Index: lxbios/lxbios.c
===================================================================
--- lxbios/lxbios.c	(revision 0)
+++ lxbios/lxbios.c	(revision 0)
@@ -0,0 +1,754 @@
+/*****************************************************************************\
+ * lxbios.c
+ * $Id: lxbios.c,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include "common.h"
+#include "opts.h"
+#include "lbtable.h"
+#include "layout.h"
+#include "layout_file.h"
+#include "input_file.h"
+#include "cmos_ops.h"
+#include "cmos_lowlevel.h"
+#include "reg_expr.h"
+#include "hexdump.h"
+
+typedef void (*op_fn_t) (void);
+
+static void op_show_version (void);
+static void op_show_usage (void);
+static void op_lbtable_show_info (void);
+static void op_lbtable_dump (void);
+static void op_show_param_values (void);
+static void op_cmos_show_one_param (void);
+static void op_cmos_show_all_params (void);
+static void op_cmos_set_one_param (void);
+static void op_cmos_set_params_stdin (void);
+static void op_cmos_set_params_file (void);
+static void op_cmos_checksum (void);
+static void op_show_layout (void);
+static void op_write_cmos_dump (void);
+static void op_read_cmos_dump (void);
+static void op_show_cmos_hex_dump (void);
+static void op_show_cmos_dumpfile (void);
+static int list_one_param (const char name[], int show_name);
+static int list_all_params (void);
+static void list_param_enums (const char name[]);
+static void set_one_param (const char name[], const char value[]);
+static void set_params (FILE *f);
+static void parse_assignment (char arg[], const char **name,
+                              const char **value);
+static int list_cmos_entry (const cmos_entry_t *e, int show_name);
+static uint16_t convert_checksum_value (const char value[]);
+
+static const op_fn_t op_fns[] =
+ { op_show_version,
+   op_show_usage,
+   op_lbtable_show_info,
+   op_lbtable_dump,
+   op_show_param_values,
+   op_cmos_show_one_param,
+   op_cmos_show_all_params,
+   op_cmos_set_one_param,
+   op_cmos_set_params_stdin,
+   op_cmos_set_params_file,
+   op_cmos_checksum,
+   op_show_layout,
+   op_write_cmos_dump,
+   op_read_cmos_dump,
+   op_show_cmos_hex_dump,
+   op_show_cmos_dumpfile
+ };
+
+static const hexdump_format_t cmos_dump_format =
+ { 16, 2, "", " | ", " ", " | ", '.', NULL };
+
+/****************************************************************************
+ * main
+ ****************************************************************************/
+int main (int argc, char *argv[])
+ { cmos_layout_get_fn_t fn;
+
+   parse_lxbios_args(argc, argv);
+
+   if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found)
+    { set_layout_filename(
+            lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].param);
+      fn = get_layout_from_file;
+    }
+   else
+      fn = get_layout_from_cmos_table;
+
+   register_cmos_layout_get_fn(fn);
+   op_fns[lxbios_op.op]();
+   return 0;
+ }
+
+/****************************************************************************
+ * op_show_version
+ *
+ * -v
+ *
+ * Show version information for this program.
+ ****************************************************************************/
+static void op_show_version (void)
+ { printf("This is %s version %s.\n", prog_name, prog_version); }
+
+/****************************************************************************
+ * op_show_usage
+ *
+ * -h
+ *
+ * Show a usage message for this program.
+ ****************************************************************************/
+static void op_show_usage (void)
+ { usage(stdout); }
+
+/****************************************************************************
+ * op_lbtable_show_info
+ *
+ * -l [ARG]
+ *
+ * If ARG is present, show LinuxBIOS table information specified by ARG.
+ * Else show all possible values for ARG.
+ ****************************************************************************/
+static void op_lbtable_show_info (void)
+ { if (lxbios_op.param == NULL)
+      list_lbtable_choices();
+   else
+    { get_lbtable();
+      list_lbtable_item(lxbios_op.param);
+    }
+ }
+
+/****************************************************************************
+ * op_lbtable_dump
+ *
+ * -d
+ *
+ * Do low-level dump of LinuxBIOS table.
+ ****************************************************************************/
+static void op_lbtable_dump (void)
+ { get_lbtable();
+   dump_lbtable();
+ }
+
+/****************************************************************************
+ * op_show_param_values
+ *
+ * -e NAME option
+ *
+ * Show all possible values for parameter NAME.
+ ****************************************************************************/
+static void op_show_param_values (void)
+ { get_cmos_layout();
+   list_param_enums(lxbios_op.param);
+ }
+
+/****************************************************************************
+ * op_cmos_show_one_param
+ *
+ * [-n] -r NAME
+ *
+ * Show parameter NAME.  If -n is specified, show value only.  Else show name
+ * and value.
+ ****************************************************************************/
+static void op_cmos_show_one_param (void)
+ { int result;
+
+   get_cmos_layout();
+   result = list_one_param(lxbios_op.param,
+                  !lxbios_op_modifiers[LXBIOS_MOD_SHOW_VALUE_ONLY].found);
+   cmos_checksum_verify();
+
+   if (result)
+      exit(1);
+ }
+
+/****************************************************************************
+ * op_cmos_show_all_params
+ *
+ * -a
+ *
+ * Show names and values for all parameters.
+ ****************************************************************************/
+static void op_cmos_show_all_params (void)
+ { int result;
+
+   get_cmos_layout();
+   result = list_all_params();
+   cmos_checksum_verify();
+
+   if (result)
+      exit(1);
+ }
+
+/****************************************************************************
+ * op_cmos_set_one_param
+ *
+ * -w NAME=VALUE
+ *
+ * Set parameter NAME to VALUE.
+ ****************************************************************************/
+static void op_cmos_set_one_param (void)
+ { const char *name, *value;
+
+   get_cmos_layout();
+
+   /* Separate 'NAME=VALUE' syntax into two strings representing NAME and
+    * VALUE.
+    */
+   parse_assignment(lxbios_op.param, &name, &value);
+
+   set_one_param(name, value);
+ }
+
+/****************************************************************************
+ * op_cmos_set_params_stdin
+ *
+ * -i
+ *
+ * Set parameters according to standard input.
+ ****************************************************************************/
+static void op_cmos_set_params_stdin (void)
+ { get_cmos_layout();
+   set_params(stdin);
+ }
+
+/****************************************************************************
+ * op_cmos_set_params_file
+ *
+ * -p INPUT_FILE
+ *
+ * Set parameters according to INPUT_FILE.
+ ****************************************************************************/
+static void op_cmos_set_params_file (void)
+ { FILE *f;
+
+   if ((f = fopen(lxbios_op.param, "r")) == NULL)
+    { fprintf(stderr, "%s: Can not open file %s for reading: %s\n",
+              prog_name, lxbios_op.param, strerror(errno));
+      exit(1);
+    }
+
+   get_cmos_layout();
+   set_params(f);
+   fclose(f);
+ }
+
+/****************************************************************************
+ * op_cmos_checksum
+ *
+ * -c [VALUE]
+ *
+ * If VALUE is present, set LinuxBIOS CMOS checksum to VALUE.  Else show
+ * checksum value.
+ ****************************************************************************/
+static void op_cmos_checksum (void)
+ { uint16_t checksum;
+
+   get_cmos_layout();
+
+   if (lxbios_op.param == NULL)
+    { set_iopl(3);
+      checksum = cmos_checksum_read();
+      set_iopl(0);
+      printf("0x%x\n", checksum);
+    }
+   else
+    { checksum = convert_checksum_value(lxbios_op.param);
+      set_iopl(3);
+      cmos_checksum_write(checksum);
+      set_iopl(0);
+    }
+ }
+
+/****************************************************************************
+ * op_show_layout
+ *
+ * -Y
+ *
+ * Write CMOS layout information to standard output.
+ ****************************************************************************/
+static void op_show_layout (void)
+ { get_cmos_layout();
+   write_cmos_layout(stdout);
+ }
+
+/****************************************************************************
+ * op_write_cmos_dump
+ *
+ * -b OUTPUT_FILE
+ *
+ * Write the contents of CMOS memory to a binary file.
+ ****************************************************************************/
+static void op_write_cmos_dump (void)
+ { unsigned char data[CMOS_SIZE];
+   FILE *f;
+
+   if ((f = fopen(lxbios_op.param, "w")) == NULL)
+    { fprintf(stderr, "%s: Can not open file %s for writing: %s\n",
+              prog_name, lxbios_op.param, strerror(errno));
+      exit(1);
+    }
+
+   set_iopl(3);
+   cmos_read_all(data);
+   set_iopl(0);
+
+   if (fwrite(data, 1, CMOS_SIZE, f) != CMOS_SIZE)
+    { fprintf(stderr, "%s: Error writing CMOS data to file %s: %s\n",
+              prog_name, lxbios_op.param, strerror(errno));
+      exit(1);
+    }
+
+   fclose(f);
+ }
+
+/****************************************************************************
+ * op_read_cmos_dump
+ *
+ * -B INPUT_FILE
+ *
+ * Read binary data from a file and write the data to CMOS memory.
+ ****************************************************************************/
+static void op_read_cmos_dump (void)
+ { unsigned char data[CMOS_SIZE];
+   size_t nr_bytes;
+   FILE *f;
+
+   if ((f = fopen(lxbios_op.param, "r")) == NULL)
+    { fprintf(stderr, "%s: Can not open file %s for reading: %s\n",
+              prog_name, lxbios_op.param, strerror(errno));
+      exit(1);
+    }
+
+   if ((nr_bytes = fread(data, 1, CMOS_SIZE, f)) != CMOS_SIZE)
+    { fprintf(stderr, "%s: Error: Only able to read %d bytes of CMOS data "
+              "from file %s.  CMOS data is unchanged.\n", prog_name,
+              (int) nr_bytes, lxbios_op.param);
+      exit(1);
+    }
+
+   fclose(f);
+   set_iopl(3);
+   cmos_write_all(data);
+   set_iopl(0);
+ }
+
+/****************************************************************************
+ * op_show_cmos_hex_dump
+ *
+ * -x
+ *
+ * Write a hex dump of CMOS memory to standard output.
+ ****************************************************************************/
+static void op_show_cmos_hex_dump (void)
+ { unsigned char data[CMOS_SIZE];
+
+   set_iopl(3);
+   cmos_read_all(data);
+   set_iopl(0);
+   hexdump(data, CMOS_SIZE, 0, stdout, &cmos_dump_format);
+ }
+
+/****************************************************************************
+ * op_show_cmos_dumpfile
+ *
+ * -X DUMP_FILE
+ *
+ * Read binary data from a file (presumably a CMOS dump file) and display a
+ * hex dump of the CMOS data from the file.
+ ****************************************************************************/
+static void op_show_cmos_dumpfile (void)
+ { unsigned char data[CMOS_SIZE];
+   size_t nr_bytes;
+   FILE *f;
+
+   if ((f = fopen(lxbios_op.param, "r")) == NULL)
+    { fprintf(stderr, "%s: Can not open file %s for reading: %s\n",
+              prog_name, lxbios_op.param, strerror(errno));
+      exit(1);
+    }
+
+   nr_bytes = fread(data, 1, CMOS_SIZE, f);
+   fclose(f);
+   hexdump(data, nr_bytes, 0, stdout, &cmos_dump_format);
+ }
+
+/****************************************************************************
+ * list_one_param
+ *
+ * Attempt to list one CMOS parameter given by 'name'.  'show_name' is a
+ * boolean value indicating whether the parameter name should be displayed
+ * along with its value.  Return 1 if error was encountered.  Else return OK.
+ ****************************************************************************/
+static int list_one_param (const char name[], int show_name)
+ { const cmos_entry_t *e;
+
+   if (is_checksum_name(name) || ((e = find_cmos_entry(name)) == NULL))
+    { fprintf(stderr, "%s: CMOS parameter %s not found.\n", prog_name, name);
+      exit(1);
+    }
+
+   if (e->config == CMOS_ENTRY_RESERVED)
+    { fprintf(stderr, "%s: Parameter %s is reserved.\n", prog_name, name);
+      exit(1);
+    }
+
+   return (list_cmos_entry(e, show_name) != 0);
+ }
+
+/****************************************************************************
+ * list_all_params
+ *
+ * Attempt to list all CMOS parameters.  Return 1 if error was encountered.
+ * Else return OK.
+ ****************************************************************************/
+static int list_all_params (void)
+ { const cmos_entry_t *e;
+   int result;
+
+   result = OK;
+
+   for (e = first_cmos_entry(); e != NULL; e = next_cmos_entry(e))
+    { if ((e->config == CMOS_ENTRY_RESERVED) || is_checksum_name(e->name))
+         continue;
+
+      if (list_cmos_entry(e, TRUE))
+         result = 1;
+    }
+
+   return result;
+ }
+
+/****************************************************************************
+ * list_param_enums
+ *
+ * List all possible values for CMOS parameter given by 'name'.
+ ****************************************************************************/
+static void list_param_enums (const char name[])
+ { const cmos_entry_t *e;
+   const cmos_enum_t *p;
+
+   if (is_checksum_name(name) || (e = find_cmos_entry(name)) == NULL)
+    { fprintf(stderr, "%s: CMOS parameter %s not found.\n", prog_name, name);
+      exit(1);
+    }
+
+   switch (e->config)
+    { case CMOS_ENTRY_ENUM:
+         for (p = first_cmos_enum_id(e->config_id);
+              p != NULL;
+              p = next_cmos_enum_id(p))
+            printf("%s\n", p->text);
+
+         break;
+
+      case CMOS_ENTRY_HEX:
+         printf("Parameter %s requires a %u-bit unsigned integer.\n", name,
+                e->length);
+         break;
+
+      case CMOS_ENTRY_RESERVED:
+         printf("Parameter %s is reserved.\n", name);
+         break;
+
+      default:
+         BUG();
+    }
+ }
+
+/****************************************************************************
+ * set_one_param
+ *
+ * Set the CMOS parameter given by 'name' to 'value'.  The 'name' parameter
+ * is case-sensitive.  If we are setting an enum parameter, then 'value' is
+ * interpreted as a case-sensitive string that must match the option name
+ * exactly.  If we are setting a 'hex' parameter, then 'value' is treated as
+ * a string representation of an unsigned integer that may be specified in
+ * decimal, hex, or octal.
+ ****************************************************************************/
+static void set_one_param (const char name[], const char value[])
+ { const cmos_entry_t *e;
+   unsigned long long n;
+
+   if (is_checksum_name(name) || (e = find_cmos_entry(name)) == NULL)
+    { fprintf(stderr, "%s: CMOS parameter %s not found.", prog_name, name);
+      exit(1);
+    }
+
+   switch (prepare_cmos_write(e, value, &n))
+    { case OK:
+         break;
+
+      case CMOS_OP_BAD_ENUM_VALUE:
+         fprintf(stderr, "%s: Bad value for parameter %s.", prog_name, name);
+         goto fail;
+
+      case CMOS_OP_NEGATIVE_INT:
+         fprintf(stderr,
+                 "%s: This program does not support assignment of negative "
+                 "numbers to LinuxBIOS parameters.", prog_name);
+         goto fail;
+
+      case CMOS_OP_INVALID_INT:
+         fprintf(stderr, "%s: %s is not a valid integer.", prog_name, value);
+         goto fail;
+
+      case CMOS_OP_RESERVED:
+         fprintf(stderr,
+                 "%s: Can not modify reserved LinuxBIOS parameter %s.",
+                 prog_name, name);
+         goto fail;
+
+      case CMOS_OP_VALUE_TOO_WIDE:
+         fprintf(stderr,
+                 "%s: Can not write value %s to CMOS parameter %s that is "
+                 "only %d bits wide.", prog_name, value, name, e->length);
+         goto fail;
+
+      case CMOS_OP_NO_MATCHING_ENUM:
+         fprintf(stderr,
+                 "%s: LinuxBIOS parameter %s has no matching enums.",
+                 prog_name, name);
+         goto fail;
+
+      case CMOS_AREA_OUT_OF_RANGE:
+         fprintf(stderr,
+                 "%s: The CMOS area specified by the layout info for "
+                 "LinuxBIOS parameter %s is out of range.", prog_name, name);
+         goto fail;
+
+      case CMOS_AREA_OVERLAPS_RTC:
+         fprintf(stderr,
+                 "%s: The CMOS area specified by the layout info for "
+                 "LinuxBIOS parameter %s overlaps the realtime clock area.",
+                 prog_name, name);
+         goto fail;
+
+      case CMOS_AREA_TOO_WIDE:
+         fprintf(stderr,
+                 "%s: The CMOS area specified by the layout info for "
+                 "LinuxBIOS parameter %s is too wide.",
+                 prog_name, name);
+         goto fail;
+
+      default:
+         fprintf(stderr,
+                 "%s: Unknown error encountered while attempting to modify "
+                 "LinuxBIOS parameter %s.", prog_name, name);
+         goto fail;
+    }
+
+   /* write the value to nonvolatile RAM */
+   set_iopl(3);
+   cmos_write(e->bit, e->length, n);
+   cmos_checksum_write(cmos_checksum_compute());
+   set_iopl(0);
+   return;
+
+fail:
+   fprintf(stderr, "  CMOS write not performed.\n");
+   exit(1);
+ }
+
+/****************************************************************************
+ * set_params
+ *
+ * Set LinuxBIOS parameters according to the contents of file 'f'.
+ ****************************************************************************/
+static void set_params (FILE *f)
+ { /* First process the input file.  Then perform writes only if there were
+    * no problems processing the input.  Either all values will be written
+    * successfully or no values will be written.
+    */
+   do_cmos_writes(process_input_file(f));
+ }
+
+/****************************************************************************
+ * parse_assignment
+ *
+ * Parse the string 'arg' (which supposedly represents an assignment) into a
+ * NAME and a VALUE.  If 'arg' does not conform to the proper assignment
+ * syntax, exit with a usage message.  Otherwise, on return, 'arg' is broken
+ * into substrings representing NAME and VALUE, and *name and *value are set
+ * to point to these two substrings.
+ ****************************************************************************/
+static void parse_assignment (char arg[], const char **name,
+                              const char **value)
+ { static const size_t N_MATCHES = 4;
+   regmatch_t match[N_MATCHES];
+   regex_t assignment;
+
+   compile_reg_exprs(REG_EXTENDED | REG_NEWLINE, 1, assignment_regex,
+                     &assignment);
+
+   /* Does 'arg' conform to proper assignment syntax?  If not, exit with a
+    * usage message.
+    */
+   if (regexec(&assignment, arg, N_MATCHES, match, 0))
+      usage(stderr);
+
+   /* Ok, we found a valid assignment.  Break it into two strings
+    * representing NAME and VALUE.
+    */
+   arg[match[1].rm_eo] = '\0';
+   arg[match[2].rm_eo] = '\0';
+   *name = &arg[match[1].rm_so];
+   *value = &arg[match[2].rm_so];
+
+   free_reg_exprs(1, &assignment);
+ }
+
+/****************************************************************************
+ * list_cmos_entry
+ *
+ * Attempt to list the CMOS entry represented by 'e'.  'show_name' is a
+ * boolean value indicating whether the parameter name should be displayed
+ * along with its value.  On success, return OK.  On error, print an error
+ * message and return 1.
+ ****************************************************************************/
+static int list_cmos_entry (const cmos_entry_t *e, int show_name)
+ { const cmos_enum_t *p;
+   unsigned long long value;
+
+   /* sanity check CMOS entry */
+   switch (prepare_cmos_read(e))
+    { case OK:
+         break;
+
+      case CMOS_OP_RESERVED:
+         BUG();
+
+      case CMOS_AREA_OUT_OF_RANGE:
+         fprintf(stderr, "%s: Can not read LinuxBIOS parameter %s because "
+                 "layout info specifies out of range CMOS area.\n", prog_name,
+                 e->name);
+         return 1;
+
+      case CMOS_AREA_OVERLAPS_RTC:
+         fprintf(stderr, "%s: Can not read LinuxBIOS parameter %s because "
+                 "layout info specifies CMOS area that overlaps realtime "
+                 "clock area.\n", prog_name, e->name);
+         return 1;
+
+      case CMOS_AREA_TOO_WIDE:
+         fprintf(stderr, "%s: Can not read LinuxBIOS parameter %s because "
+                 "layout info specifies CMOS area that is too wide.\n",
+                 prog_name, e->name);
+         return 1;
+
+      default:
+         fprintf(stderr, "%s: Unknown error encountered while attempting to "
+                 "read LinuxBIOS parameter %s\n", prog_name, e->name);
+         return 1;
+    }
+
+   /* read the value from CMOS */
+   set_iopl(3);
+   value = cmos_read(e->bit, e->length);
+   set_iopl(0);
+
+   /* display the value */
+   switch (e->config)
+    { case CMOS_ENTRY_ENUM:
+         if ((p = find_cmos_enum(e->config_id, value)) == NULL)
+          { if (show_name)
+               printf("# Bad value -> %s = 0x%llx\n", e->name, value);
+            else
+               printf("Bad value -> 0x%llx\n", value);
+          }
+         else
+          { if (show_name)
+               printf("%s = %s\n", e->name, p->text);
+            else
+               printf("%s\n", p->text);
+          }
+
+         break;
+
+      case CMOS_ENTRY_HEX:
+         if (show_name)
+            printf("%s = 0x%llx\n", e->name, value);
+         else
+            printf("0x%llx\n", value);
+
+         break;
+
+      case CMOS_ENTRY_RESERVED:
+      default:
+         BUG();
+    }
+
+   return OK;
+ }
+
+/****************************************************************************
+ * convert_checksum_value
+ *
+ * 'value' is the string representation of a checksum value that the user
+ * wishes to set using the -c option.  Convert the string to a 16-bit
+ * unsigned integer and return the result.  Exit with an error message if
+ * 'value' is invalid.
+ ****************************************************************************/
+static uint16_t convert_checksum_value (const char value[])
+ { unsigned long n;
+   const char *p;
+   uint16_t result;
+   int negative;
+
+   for (p = value; isspace(*p); p++);
+
+   negative = (*p == '-');
+   n = strtoul(value, (char **) &p, 0);
+
+   if (*p)
+    { fprintf(stderr, "%s: Checksum value %s is not a valid integer.\n",
+              prog_name, value);
+      exit(1);
+    }
+
+   if (negative)
+    { fprintf(stderr,
+              "%s: Checksum must be an unsigned integer.\n", prog_name);
+      exit(1);
+    }
+
+   result = (uint16_t) n;
+
+   if (result != n)
+    { fprintf(stderr,
+              "%s: Checksum value must fit within 16 bits.\n", prog_name);
+      exit(1);
+    }
+
+   return result;
+ }
Index: lxbios/lbtable.c
===================================================================
--- lxbios/lbtable.c	(revision 0)
+++ lxbios/lbtable.c	(revision 0)
@@ -0,0 +1,1270 @@
+/*****************************************************************************\
+ * lbtable.c
+ * $Id: lbtable.c,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>
+ *  and Stefan Reinauer <stepan@openbios.org>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include <sys/mman.h>
+#include "common.h"
+#include "linuxbios_tables.h"
+#include "ip_checksum.h"
+#include "lbtable.h"
+#include "layout.h"
+#include "cmos_lowlevel.h"
+#include "hexdump.h"
+
+typedef void (*lbtable_print_fn_t) (const struct lb_record *rec);
+
+/* This structure represents an item in the LinuxBIOS table that may be
+ * displayed using the -l option.
+ */
+typedef struct
+ { uint32_t tag;
+   const char *name;
+   const char *description;
+   const char *nofound_msg;
+   lbtable_print_fn_t print_fn;
+ }
+lbtable_choice_t;
+
+typedef struct
+ { unsigned long start;  /* address of first byte of memory range */
+   unsigned long end;  /* address of last byte of memory range */
+ }
+mem_range_t;
+
+static const struct lb_header * lbtable_scan (unsigned long start,
+                                              unsigned long end,
+                                              int *bad_header_count,
+                                              int *bad_table_count);
+static void process_cmos_table (void);
+static void get_cmos_checksum_info (void);
+static void try_convert_checksum_layout (cmos_checksum_layout_t *layout);
+static void try_add_cmos_table_enum (cmos_enum_t *cmos_enum);
+static void try_add_cmos_table_entry (cmos_entry_t *cmos_entry);
+static const struct lb_record * find_lbrec (uint32_t tag);
+static const char * lbrec_tag_to_str (uint32_t tag);
+static const struct cmos_entries * first_cmos_table_entry (void);
+static const struct cmos_entries *
+      next_cmos_table_entry (const struct cmos_entries *last);
+static const struct cmos_enums * first_cmos_table_enum (void);
+static const struct cmos_enums * next_cmos_table_enum
+      (const struct cmos_enums *last);
+static const struct lb_record * first_cmos_rec (uint32_t tag);
+static const struct lb_record * next_cmos_rec (const struct lb_record *last,
+                                               uint32_t tag);
+static void memory_print_fn (const struct lb_record *rec);
+static void mainboard_print_fn (const struct lb_record *rec);
+static void cmos_opt_table_print_fn (const struct lb_record *rec);
+static void print_option_record (const struct cmos_entries *cmos_entry);
+static void print_enum_record (const struct cmos_enums *cmos_enum);
+static void print_defaults_record (const struct cmos_defaults *cmos_defaults);
+static void print_unknown_record (const struct lb_record *cmos_item);
+static void option_checksum_print_fn (const struct lb_record *rec);
+static void string_print_fn (const struct lb_record *rec);
+static void uint64_to_hex_string (char str[], uint64_t n);
+
+static const char memory_desc[] =
+"    This shows information about system memory.\n";
+
+static const char mainboard_desc[] =
+"    This shows information about your mainboard.\n";
+
+static const char version_desc[] =
+"    This shows LinuxBIOS version information.\n";
+
+static const char extra_version_desc[] =
+"    This shows extra LinuxBIOS version information.\n";
+
+static const char build_desc[] =
+"    This shows LinuxBIOS build information.\n";
+
+static const char compile_time_desc[] =
+"    This shows when LinuxBIOS was compiled.\n";
+
+static const char compile_by_desc[] =
+"    This shows who compiled LinuxBIOS.\n";
+
+static const char compile_host_desc[] =
+"    This shows the name of the machine that compiled LinuxBIOS.\n";
+
+static const char compile_domain_desc[] =
+"    This shows the domain name of the machine that compiled LinuxBIOS.\n";
+
+static const char compiler_desc[] =
+"    This shows the name of the compiler used to build LinuxBIOS.\n";
+
+static const char linker_desc[] =
+"    This shows the name of the linker used to build LinuxBIOS.\n";
+
+static const char assembler_desc[] =
+"    This shows the name of the assembler used to build LinuxBIOS.\n";
+
+static const char cmos_opt_table_desc[] =
+"    This does a low-level dump of the CMOS option table.  The table "
+"contains\n"
+"    information about the layout of the values that LinuxBIOS stores in\n"
+"    nonvolatile RAM.\n";
+
+static const char option_checksum_desc[] =
+"    This shows the location of the CMOS checksum and the area over which it "
+"is\n"
+"    calculated.\n";
+
+static const char generic_nofound_msg[] =
+"%s: Item %s not found in LinuxBIOS table.\n";
+
+static const char nofound_msg_cmos_opt_table[] =
+"%s: Item %s not found in LinuxBIOS table.  Apparently, the "
+"LinuxBIOS installed on this system was built without specifying "
+"HAVE_OPTION_TABLE.\n";
+
+static const char nofound_msg_option_checksum[] =
+"%s: Item %s not found in LinuxBIOS table. Apparently, you are "
+"using LinuxBIOS v1.\n";
+
+/* This is the number of items from the LinuxBIOS table that may be displayed
+ * using the -l option.
+ */
+#define NUM_LBTABLE_CHOICES 14
+
+/* These represent the various items from the LinuxBIOS table that may be
+ * displayed using the -l option.
+ */
+static const lbtable_choice_t lbtable_choices[NUM_LBTABLE_CHOICES] =
+ { { LB_TAG_MEMORY,            "memory",
+     memory_desc,              generic_nofound_msg,
+     memory_print_fn
+   },
+   { LB_TAG_MAINBOARD,         "mainboard",
+     mainboard_desc,           generic_nofound_msg,
+     mainboard_print_fn
+   },
+   { LB_TAG_VERSION,           "version",
+     version_desc,             generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_EXTRA_VERSION,     "extra_version",
+     extra_version_desc,       generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_BUILD,             "build",
+     build_desc,               generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_COMPILE_TIME,      "compile_time",
+     compile_time_desc,        generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_COMPILE_BY,        "compile_by",
+     compile_by_desc,          generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_COMPILE_HOST,      "compile_host",
+     compile_host_desc,        generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_COMPILE_DOMAIN,    "compile_domain",
+     compile_domain_desc,      generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_COMPILER,          "compiler",
+     compiler_desc,            generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_LINKER,            "linker",
+     linker_desc,              generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_ASSEMBLER,         "assembler",
+     assembler_desc,           generic_nofound_msg,
+     string_print_fn
+   },
+   { LB_TAG_CMOS_OPTION_TABLE, "cmos_opt_table",
+     cmos_opt_table_desc,      nofound_msg_cmos_opt_table,
+     cmos_opt_table_print_fn
+   },
+   { LB_TAG_OPTION_CHECKSUM, "option_checksum",
+     option_checksum_desc,     nofound_msg_option_checksum,
+     option_checksum_print_fn
+   }
+ };
+
+/* The LinuxBIOS table resides in low physical memory, which we access using
+ * /dev/mem.  These are ranges of physical memory that should be scanned for a
+ * LinuxBIOS table.
+ */
+
+#define NUM_MEM_RANGES 2
+
+static const mem_range_t mem_ranges[NUM_MEM_RANGES] =
+ { { 0x00000000, 0x00000fff },
+   { 0x000f0000, 0x000fffff }
+ };
+
+/* This is the number of bytes of physical memory to map, starting at physical
+ * address 0.  This value must be large enough to contain all memory ranges
+ * specified in mem_ranges above plus the maximum possible size of the
+ * LinuxBIOS table (since the start of the table could potentially occur at
+ * the end of the last memory range).
+ */
+static const size_t BYTES_TO_MAP = (1024 * 1024);
+
+/* Pointer to low physical memory that we access by calling mmap() on
+ * /dev/mem.
+ */
+static const void *low_phys_mem;
+
+/* Pointer to LinuxBIOS table. */
+static const struct lb_header *lbtable = NULL;
+
+/* The CMOS option table is located within the LinuxBIOS table.  It tells us
+ * where the CMOS parameters are located in the nonvolatile RAM.
+ */
+static const struct cmos_option_table *cmos_table = NULL;
+
+static const hexdump_format_t format =
+ { 12, 4, "            ", " | ", " ", " | ", '.', NULL };
+
+/****************************************************************************
+ * vtophys
+ *
+ * Convert a virtual address to a physical address.  'vaddr' is a virtual
+ * address in the address space of the current process.  It points to
+ * somewhere in the chunk of memory that we mapped by calling mmap() on
+ * /dev/mem.  This macro converts 'vaddr' to a physical address.
+ ****************************************************************************/
+#define vtophys(vaddr) (((unsigned long) vaddr) -       \
+                        ((unsigned long) low_phys_mem))
+
+/****************************************************************************
+ * phystov
+ *
+ * Convert a physical address to a virtual address.  'paddr' is a physical
+ * address.  This macro converts 'paddr' to a virtual address in the address
+ * space of the current process.  The virtual to physical mapping was set up
+ * by calling mmap() on /dev/mem.
+ ****************************************************************************/
+#define phystov(paddr) (((unsigned long) low_phys_mem) + \
+                        ((unsigned long) paddr))
+
+/****************************************************************************
+ * get_lbtable
+ *
+ * Find the LinuxBIOS table and set global variable lbtable to point to it.
+ ****************************************************************************/
+void get_lbtable (void)
+ { int fd, i, bad_header_count, bad_table_count, bad_headers, bad_tables;
+
+   if (lbtable != NULL)
+      return;
+
+   /* The LinuxBIOS table is located in low physical memory, which may be
+    * conveniently accessed by calling mmap() on /dev/mem.
+    */
+
+   if ((fd = open("/dev/mem", O_RDONLY, 0)) < 0)
+    { fprintf(stderr, "%s: Can not open /dev/mem for reading: %s\n",
+              prog_name, strerror(errno));
+      exit(1);
+    }
+
+   if ((low_phys_mem = mmap(NULL, BYTES_TO_MAP, PROT_READ, MAP_SHARED, fd, 0))
+       == MAP_FAILED)
+    { fprintf(stderr, "%s: Failed to mmap /dev/mem: %s\n", prog_name,
+              strerror(errno));
+      exit(1);
+    }
+
+   bad_header_count = 0;
+   bad_table_count = 0;
+
+   for (i = 0; i < NUM_MEM_RANGES; i++)
+    { lbtable = lbtable_scan(phystov(mem_ranges[i].start),
+                             phystov(mem_ranges[i].end),
+                             &bad_headers, &bad_tables);
+
+      if (lbtable != NULL)
+         return; /* success: we found it! */
+
+      bad_header_count += bad_headers;
+      bad_table_count += bad_tables;
+    }
+
+   fprintf(stderr,
+           "%s: LinuxBIOS table not found.  LinuxBIOS does not appear to\n"
+           "        be installed on this system.  Scanning for the table "
+           "produced the\n"
+           "        following results:\n\n"
+           "            %d valid signatures were found with bad header "
+           "checksums.\n"
+           "            %d valid headers were found with bad table "
+           "checksums.\n",
+           prog_name, bad_header_count, bad_table_count);
+   exit(1);
+ }
+
+/****************************************************************************
+ * get_layout_from_cmos_table
+ *
+ * Find the CMOS table which is stored within the LinuxBIOS table and set the
+ * global variable cmos_table to point to it.
+ ****************************************************************************/
+void get_layout_from_cmos_table (void)
+ {
+
+   get_lbtable();
+   cmos_table = (const struct cmos_option_table *)
+                find_lbrec(LB_TAG_CMOS_OPTION_TABLE);
+
+   if ((cmos_table) == NULL)
+    { fprintf(stderr,
+              "%s: CMOS option table not found in LinuxBIOS table.  "
+              "Apparently, the LinuxBIOS installed on this system was "
+              "built without specifying HAVE_OPTION_TABLE.\n",
+              prog_name);
+      exit(1);
+    }
+
+   process_cmos_table();
+   get_cmos_checksum_info();
+ }
+
+/****************************************************************************
+ * dump_lbtable
+ *
+ * Do a low-level dump of the LinuxBIOS table.
+ ****************************************************************************/
+void dump_lbtable (void)
+ { const char *p, *data;
+   uint32_t bytes_processed;
+   const struct lb_record *lbrec;
+
+   p = ((const char *) lbtable) + lbtable->header_bytes;
+   printf("LinuxBIOS table at physical address 0x%lx:\n"
+          "    signature:       0x%x (ASCII: %c%c%c%c)\n"
+          "    header_bytes:    0x%x (decimal: %d)\n"
+          "    header_checksum: 0x%x (decimal: %d)\n"
+          "    table_bytes:     0x%x (decimal: %d)\n"
+          "    table_checksum:  0x%x (decimal: %d)\n"
+          "    table_entries:   0x%x (decimal: %d)\n\n",
+          vtophys(lbtable), *((uint32_t *) lbtable->signature),
+          lbtable->signature[0], lbtable->signature[1],lbtable->signature[2],
+          lbtable->signature[3], lbtable->header_bytes, lbtable->header_bytes,
+          lbtable->header_checksum, lbtable->header_checksum,
+          lbtable->table_bytes, lbtable->table_bytes, lbtable->table_checksum,
+          lbtable->table_checksum, lbtable->table_entries,
+          lbtable->table_entries);
+
+   if ((lbtable->table_bytes == 0) != (lbtable->table_entries == 0))
+    { printf("Inconsistent values for table_bytes and table_entries!!!\n"
+             "They should be either both 0 or both nonzero.\n");
+      return;
+    }
+
+   if (lbtable->table_bytes == 0)
+    { printf("The LinuxBIOS table is empty!!!\n");
+      return;
+    }
+
+   for (bytes_processed = 0; ; )
+    { lbrec = (const struct lb_record *) &p[bytes_processed];
+      printf("    %s record at physical address 0x%lx:\n"
+             "        tag:  0x%x (decimal: %d)\n"
+             "        size: 0x%x (decimal: %d)\n"
+             "        data:\n",
+             lbrec_tag_to_str(lbrec->tag), vtophys(lbrec), lbrec->tag,
+             lbrec->tag, lbrec->size, lbrec->size);
+
+      data = ((const char *) lbrec) + sizeof(*lbrec);
+      hexdump(data, lbrec->size - sizeof(*lbrec), vtophys(data), stdout,
+              &format);
+
+      bytes_processed += lbrec->size;
+
+      if (bytes_processed >= lbtable->table_bytes)
+         break;
+
+      printf("\n");
+    }
+ }
+
+/****************************************************************************
+ * list_lbtable_choices
+ *
+ * List names and informational blurbs for items from the LinuxBIOS table
+ * that may be displayed using the -l option.
+ ****************************************************************************/
+void list_lbtable_choices (void)
+ { int i;
+
+   for (i = 0; ; )
+    { printf("%s:\n%s",
+             lbtable_choices[i].name, lbtable_choices[i].description);
+
+      if (++i >= NUM_LBTABLE_CHOICES)
+         break;
+
+      printf("\n");
+    }
+ }
+
+/****************************************************************************
+ * list_lbtable_item
+ *
+ * Show the LinuxBIOS table item specified by 'item'.
+ ****************************************************************************/
+void list_lbtable_item (const char item[])
+ { int i;
+   const struct lb_record *rec;
+
+   for (i = 0; i < NUM_LBTABLE_CHOICES; i++)
+    { if (strcmp(item, lbtable_choices[i].name) == 0)
+         break;
+    }
+
+   if (i == NUM_LBTABLE_CHOICES)
+    { fprintf(stderr, "%s: Invalid LinuxBIOS table item %s.\n", prog_name,
+              item);
+      exit(1);
+    }
+
+   if ((rec = find_lbrec(lbtable_choices[i].tag)) == NULL)
+    { fprintf(stderr, lbtable_choices[i].nofound_msg, prog_name,
+              lbtable_choices[i].name);
+      exit(1);
+    }
+
+   lbtable_choices[i].print_fn(rec);
+ }
+
+/****************************************************************************
+ * lbtable_scan
+ *
+ * Scan the chunk of memory specified by 'start' and 'end' for a LinuxBIOS
+ * table.  The first 4 bytes of the table are marked by the signature
+ * { 'L', 'B', 'I', 'O' }.  'start' and 'end' indicate the addresses of the
+ * first and last bytes of the chunk of memory to be scanned.  For instance,
+ * values of 0x10000000 and 0x1000ffff for 'start' and 'end' specify a 64k
+ * chunk of memory starting at address 0x10000000.  'start' and 'end' are
+ * virtual addresses in the address space of the current process.  They
+ * represent a chunk of memory obtained by calling mmap() on /dev/mem.
+ *
+ * If a LinuxBIOS table is found, return a pointer to it.  Otherwise return
+ * NULL.  On return, *bad_header_count and *bad_table_count are set as
+ * follows:
+ *
+ *     *bad_header_count:
+ *         Indicates the number of times in which a valid signature was found
+ *         but the header checksum was invalid.
+ *
+ *     *bad_table_count:
+ *         Indicates the number of times in which a header with a valid
+ *         checksum was found but the table checksum was invalid.
+ ****************************************************************************/
+static const struct lb_header * lbtable_scan (unsigned long start,
+                                              unsigned long end,
+                                              int *bad_header_count,
+                                              int *bad_table_count)
+ { static const char signature[] = { 'L', 'B', 'I', 'O' };
+   const struct lb_header *table;
+   const uint32_t *p;
+   uint32_t sig;
+
+   assert(end >= start);
+   sig = (*((const uint32_t *) signature));
+   table = NULL;
+   *bad_header_count = 0;
+   *bad_table_count = 0;
+
+   /* Look for signature.  Table is aligned on 16-byte boundary.  Therefore
+    * only check every fourth 32-bit memory word.  As the loop is coded below,
+    * this function will behave in a reasonable manner for ALL possible values
+    * for 'start' and 'end': even weird boundary cases like 0x00000000 and
+    * 0xffffffff on a 32-bit architecture.
+    */
+   for (p = (const uint32_t *) start;
+        (((unsigned long) p) <= end) &&
+        ((end - (unsigned long) p) >= (sizeof(uint32_t) - 1));
+        p += 4)
+    { if (*p != sig)
+         continue;
+
+      /* We found a valid signature. */
+      table = (const struct lb_header *) p;
+
+      /* validate header checksum */
+      if (compute_ip_checksum((void *) table, sizeof(*table)))
+       { (*bad_header_count)++;
+         continue;
+       }
+
+      /* validate table checksum */
+      if (table->table_checksum !=
+          compute_ip_checksum(((char *) table) + sizeof(*table),
+                              table->table_bytes))
+       { (*bad_table_count)++;
+         continue;
+       }
+
+      /* checksums are ok: we found it! */
+      return table;
+    }
+
+   return NULL;
+ }
+
+/****************************************************************************
+ * process_cmos_table
+ *
+ * Extract layout information from the CMOS option table and store it in our
+ * internal repository.
+ ****************************************************************************/
+static void process_cmos_table (void)
+ { const struct cmos_enums *p;
+   const struct cmos_entries *q;
+   cmos_enum_t cmos_enum;
+   cmos_entry_t cmos_entry;
+
+   /* First add the enums. */
+   for (p = first_cmos_table_enum(); p != NULL; p = next_cmos_table_enum(p))
+    { cmos_enum.config_id = p->config_id;
+      cmos_enum.value = p->value;
+      strncpy(cmos_enum.text, p->text, CMOS_MAX_TEXT_LENGTH);
+      cmos_enum.text[CMOS_MAX_TEXT_LENGTH] = '\0';
+      try_add_cmos_table_enum(&cmos_enum);
+    }
+
+   /* Now add the entries.  We must add the entries after the enums because
+    * the entries are sanity checked against the enums as they are added.
+    */
+   for (q = first_cmos_table_entry(); q != NULL; q = next_cmos_table_entry(q))
+    { cmos_entry.bit = q->bit;
+      cmos_entry.length = q->length;
+
+      switch (q->config)
+       { case 'e':
+            cmos_entry.config = CMOS_ENTRY_ENUM;
+            break;
+
+         case 'h':
+            cmos_entry.config = CMOS_ENTRY_HEX;
+            break;
+
+         case 'r':
+            cmos_entry.config = CMOS_ENTRY_RESERVED;
+            break;
+
+         default:
+            fprintf(stderr,
+                    "%s: Entry in CMOS option table has unknown config "
+                    "value.\n", prog_name);
+            exit(1);
+       }
+
+      cmos_entry.config_id = q->config_id;
+      strncpy(cmos_entry.name, q->name, CMOS_MAX_NAME_LENGTH);
+      cmos_entry.name[CMOS_MAX_NAME_LENGTH] = '\0';
+      try_add_cmos_table_entry(&cmos_entry);
+    }
+ }
+
+/****************************************************************************
+ * get_cmos_checksum_info
+ *
+ * Get layout information for CMOS checksum.
+ ****************************************************************************/
+static void get_cmos_checksum_info (void)
+ { const cmos_entry_t *e;
+   struct cmos_checksum *checksum;
+   cmos_checksum_layout_t layout;
+   unsigned index, index2;
+
+   checksum = (struct cmos_checksum *) find_lbrec(LB_TAG_OPTION_CHECKSUM);
+
+   if (checksum != NULL)
+    { /* We are lucky.  The LinuxBIOS table hints us to the checksum.
+       * We might have to check the type field here though.
+       */
+      layout.summed_area_start = checksum->range_start;
+      layout.summed_area_end = checksum->range_end;
+      layout.checksum_at = checksum->location;
+      try_convert_checksum_layout(&layout);
+      cmos_checksum_start = layout.summed_area_start;
+      cmos_checksum_end = layout.summed_area_end;
+      cmos_checksum_index = layout.checksum_at;
+      return;
+    }
+
+   if ((e = find_cmos_entry(checksum_param_name)) == NULL)
+      return;
+
+   /* If we get here, we are unlucky.  The CMOS option table contains the
+    * location of the CMOS checksum.  However, there is no information
+    * regarding which bytes of the CMOS area the checksum is computed over.
+    * Thus we have to hope our presets will be fine.
+    */
+
+   if (e->bit % 8)
+    { fprintf(stderr, "%s: Error: CMOS checksum is not byte-aligned.\n",
+              prog_name);
+      exit(1);
+    }
+
+   index = e->bit / 8;
+   index2 = index + 1;  /* The CMOS checksum occupies 16 bits. */
+
+   if (verify_cmos_byte_index(index) || verify_cmos_byte_index(index2))
+    { fprintf(stderr, "%s: Error: CMOS checksum location out of range.\n",
+              prog_name);
+      exit(1);
+    }
+
+   if (((index >= cmos_checksum_start) && (index <= cmos_checksum_end)) ||
+       (((index2) >= cmos_checksum_start) && ((index2) <= cmos_checksum_end)))
+    { fprintf(stderr, "%s: Error: CMOS checksum overlaps checksummed area.\n",
+              prog_name);
+      exit(1);
+    }
+
+   cmos_checksum_index = index;
+ }
+
+/****************************************************************************
+ * try_convert_checksum_layout
+ *
+ * Perform sanity checking on CMOS checksum layout information and attempt to
+ * convert information from bit positions to byte positions.  Return OK on
+ * success or an error code on failure.
+ ****************************************************************************/
+static void try_convert_checksum_layout (cmos_checksum_layout_t *layout)
+ { switch (checksum_layout_to_bytes(layout))
+    { case OK:
+         return;
+
+      case LAYOUT_SUMMED_AREA_START_NOT_ALIGNED:
+         fprintf(stderr,
+                 "%s: CMOS checksummed area start is not byte-aligned.\n",
+                 prog_name);
+         break;
+
+      case LAYOUT_SUMMED_AREA_END_NOT_ALIGNED:
+         fprintf(stderr,
+                 "%s: CMOS checksummed area end is not byte-aligned.\n",
+                 prog_name);
+         break;
+
+      case LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED:
+         fprintf(stderr,
+                 "%s: CMOS checksum location is not byte-aligned.\n",
+                 prog_name);
+         break;
+
+      case LAYOUT_INVALID_SUMMED_AREA:
+         fprintf(stderr,
+                 "%s: CMOS checksummed area end must be greater than "
+                 "CMOS checksummed area start.\n",
+                 prog_name);
+         break;
+
+      case LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA:
+         fprintf(stderr,
+                 "%s: CMOS checksum overlaps checksummed area.\n",
+                 prog_name);
+         break;
+
+      case LAYOUT_SUMMED_AREA_OUT_OF_RANGE:
+         fprintf(stderr,
+                 "%s: CMOS checksummed area out of range.\n",
+                 prog_name);
+         break;
+
+      case LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE:
+         fprintf(stderr,
+                 "%s: CMOS checksum location out of range.\n",
+                 prog_name);
+         break;
+
+      default:
+         BUG();
+    }
+
+   exit(1);
+ }
+
+/****************************************************************************
+ * try_add_cmos_table_enum
+ *
+ * Attempt to add a CMOS enum to our internal repository.  Exit with an error
+ * message on failure.
+ ****************************************************************************/
+static void try_add_cmos_table_enum (cmos_enum_t *cmos_enum)
+ { switch (add_cmos_enum(cmos_enum))
+    { case OK:
+         return;
+
+      case LAYOUT_DUPLICATE_ENUM:
+         fprintf(stderr, "%s: Duplicate enum %s found in CMOS option "
+                 "table.\n", prog_name, cmos_enum->text);
+         break;
+
+      default:
+         BUG();
+    }
+
+   exit(1);
+ }
+
+/****************************************************************************
+ * try_add_cmos_table_entry
+ *
+ * Attempt to add a CMOS entry to our internal repository.  Exit with an
+ * error message on failure.
+ ****************************************************************************/
+static void try_add_cmos_table_entry (cmos_entry_t *cmos_entry)
+ { const cmos_entry_t *conflict;
+
+   switch (add_cmos_entry(cmos_entry, &conflict))
+    { case OK:
+         return;
+
+      case CMOS_AREA_OUT_OF_RANGE:
+         fprintf(stderr,
+                 "%s: Bad CMOS option layout in CMOS option table entry "
+                 "%s.\n", prog_name, cmos_entry->name);
+         break;
+
+      case CMOS_AREA_TOO_WIDE:
+         fprintf(stderr,
+                 "%s: Area too wide for CMOS option table entry %s.\n",
+                 prog_name, cmos_entry->name);
+         break;
+
+      case LAYOUT_ENTRY_OVERLAP:
+         fprintf(stderr,
+                 "%s: CMOS option table entries %s and %s have overlapping "
+                 "layouts.\n", prog_name, cmos_entry->name, conflict->name);
+         break;
+
+      case LAYOUT_ENTRY_BAD_LENGTH:
+         /* Silently ignore entries with zero length.  Although this should
+          * never happen in practice, we should handle the case in a
+          * reasonable manner just to be safe.
+          */
+         return;
+
+      default:
+         BUG();
+    }
+
+   exit(1);
+ }
+
+/****************************************************************************
+ * find_lbrec
+ *
+ * Find the record in the LinuxBIOS table that matches 'tag'.  Return pointer
+ * to record on success or NULL if record not found.
+ ****************************************************************************/
+static const struct lb_record * find_lbrec (uint32_t tag)
+ { const char *p;
+   uint32_t bytes_processed;
+   const struct lb_record *lbrec;
+
+   p = ((const char *) lbtable) + lbtable->header_bytes;
+
+   for (bytes_processed = 0;
+        bytes_processed < lbtable->table_bytes;
+        bytes_processed += lbrec->size)
+    { lbrec = (const struct lb_record *) &p[bytes_processed];
+
+      if (lbrec->tag == tag)
+         return lbrec;
+    }
+
+   return NULL;
+ }
+
+/****************************************************************************
+ * lbrec_tag_to_str
+ *
+ * Return a pointer to the string representation of the given LinuxBIOS table
+ * tag.
+ ****************************************************************************/
+static const char * lbrec_tag_to_str (uint32_t tag)
+ { switch (tag)
+    { case LB_TAG_UNUSED:
+         return "UNUSED";
+
+      case LB_TAG_MEMORY:
+         return "MEMORY";
+
+      case LB_TAG_HWRPB:
+         return "HWRPB";
+
+      case LB_TAG_MAINBOARD:
+         return "MAINBOARD";
+
+      case LB_TAG_VERSION:
+         return "VERSION";
+
+      case LB_TAG_EXTRA_VERSION:
+         return "EXTRA_VERSION";
+
+      case LB_TAG_BUILD:
+         return "BUILD";
+
+      case LB_TAG_COMPILE_TIME:
+         return "COMPILE_TIME";
+
+      case LB_TAG_COMPILE_BY:
+         return "COMPILE_BY";
+
+      case LB_TAG_COMPILE_HOST:
+         return "COMPILE_HOST";
+
+      case LB_TAG_COMPILE_DOMAIN:
+         return "COMPILE_DOMAIN";
+
+      case LB_TAG_COMPILER:
+         return "COMPILER";
+
+      case LB_TAG_LINKER:
+         return "LINKER";
+
+      case LB_TAG_ASSEMBLER:
+         return "ASSEMBLER";
+
+      case LB_TAG_CMOS_OPTION_TABLE:
+         return "CMOS_OPTION_TABLE";
+
+      case LB_TAG_OPTION_CHECKSUM:
+         return "OPTION_CHECKSUM";
+
+      default:
+         break;
+    }
+
+   return "UNKNOWN";
+ }
+
+/****************************************************************************
+ * first_cmos_table_entry
+ *
+ * Return a pointer to the first entry in the CMOS table that represents a
+ * CMOS parameter.  Return NULL if CMOS table is empty.
+ ****************************************************************************/
+static const struct cmos_entries * first_cmos_table_entry (void)
+ { return (const struct cmos_entries *) first_cmos_rec(LB_TAG_OPTION); }
+
+/****************************************************************************
+ * next_cmos_table_entry
+ *
+ * Return a pointer to the next entry after 'last' in the CMOS table that
+ * represents a CMOS parameter.  Return NULL if there are no more parameters.
+ ****************************************************************************/
+static const struct cmos_entries *
+      next_cmos_table_entry (const struct cmos_entries *last)
+ { return (const struct cmos_entries *)
+          next_cmos_rec((const struct lb_record *) last, LB_TAG_OPTION);
+ }
+
+/****************************************************************************
+ * first_cmos_table_enum
+ *
+ * Return a pointer to the first entry in the CMOS table that represents a
+ * possible CMOS parameter value.  Return NULL if the table does not contain
+ * any such entries.
+ ****************************************************************************/
+static const struct cmos_enums * first_cmos_table_enum (void)
+ { return (const struct cmos_enums *) first_cmos_rec(LB_TAG_OPTION_ENUM); }
+
+/****************************************************************************
+ * next_cmos_table_enum
+ *
+ * Return a pointer to the next entry after 'last' in the CMOS table that
+ * represents a possible CMOS parameter value.  Return NULL if there are no
+ * more parameter values.
+ ****************************************************************************/
+static const struct cmos_enums * next_cmos_table_enum
+      (const struct cmos_enums *last)
+ { return (const struct cmos_enums *)
+          next_cmos_rec((const struct lb_record *) last, LB_TAG_OPTION_ENUM);
+ }
+
+/****************************************************************************
+ * first_cmos_rec
+ *
+ * Return a pointer to the first entry in the CMOS table whose type matches
+ * 'tag'.  Return NULL if CMOS table contains no such entry.
+ *
+ * Possible values for 'tag' are as follows:
+ *
+ *     LB_TAG_OPTION:      The entry represents a CMOS parameter.
+ *     LB_TAG_OPTION_ENUM: The entry represents a possible value for a CMOS
+ *                         parameter of type 'enum'.
+ *
+ * The CMOS table tells us where in the nonvolatile RAM to look for CMOS
+ * parameter values and specifies their types as 'enum', 'hex', or
+ * 'reserved'.
+ ****************************************************************************/
+static const struct lb_record * first_cmos_rec (uint32_t tag)
+ { const char             *p;
+   uint32_t               bytes_processed, bytes_for_entries;
+   const struct lb_record *lbrec;
+
+   p = ((const char *) cmos_table) + cmos_table->header_length;
+   bytes_for_entries = cmos_table->size - cmos_table->header_length;
+
+   for (bytes_processed = 0;
+        bytes_processed < bytes_for_entries;
+        bytes_processed += lbrec->size)
+    { lbrec = (const struct lb_record *) &p[bytes_processed];
+
+      if (lbrec->tag == tag)
+         return lbrec;
+    }
+
+   return NULL;
+ }
+
+/****************************************************************************
+ * next_cmos_rec
+ *
+ * Return a pointer to the next entry after 'last' in the CMOS table whose
+ * type matches 'tag'.  Return NULL if the table contains no more entries of
+ * this type.
+ ****************************************************************************/
+static const struct lb_record * next_cmos_rec (const struct lb_record *last,
+                                               uint32_t tag)
+ { const char *p;
+   uint32_t bytes_processed, bytes_for_entries, last_offset;
+   const struct lb_record *lbrec;
+
+   p = ((const char *) cmos_table) + cmos_table->header_length;
+   bytes_for_entries = cmos_table->size - cmos_table->header_length;
+   last_offset = ((const char *) last) - p;
+
+   for (bytes_processed = last_offset + last->size;
+        bytes_processed < bytes_for_entries;
+        bytes_processed += lbrec->size)
+    { lbrec = (const struct lb_record *) &p[bytes_processed];
+
+      if (lbrec->tag == tag)
+         return lbrec;
+    }
+
+   return NULL;
+ }
+
+/****************************************************************************
+ * memory_print_fn
+ *
+ * Display function for 'memory' item of LinuxBIOS table.
+ ****************************************************************************/
+static void memory_print_fn (const struct lb_record *rec)
+ { char start_str[19], end_str[19], size_str[19];
+   const struct lb_memory *p;
+   const char *mem_type;
+   const struct lb_memory_range *ranges;
+   uint64_t size, start, end;
+   int i, entries;
+
+   p = (const struct lb_memory *) rec;
+   entries = (p->size -  sizeof(*p)) / sizeof(p->map[0]);
+   ranges = p->map;
+
+   if (entries == 0)
+    { printf("No memory ranges were found.\n");
+      return;
+    }
+
+   for (i = 0; ; )
+    { switch (ranges[i].type)
+       { case LB_MEM_RAM:
+            mem_type = "AVAILABLE";
+            break;
+
+         case LB_MEM_RESERVED:
+            mem_type = "RESERVED";
+            break;
+
+         case LB_MEM_TABLE:
+            mem_type = "CONFIG_TABLE";
+            break;
+
+         default:
+            mem_type = "UNKNOWN";
+            break;
+       }
+
+      size = unpack_lb64(ranges[i].size);
+      start = unpack_lb64(ranges[i].start);
+      end  = start + size - 1;
+      uint64_to_hex_string(start_str, start);
+      uint64_to_hex_string(end_str, end);
+      uint64_to_hex_string(size_str, size);
+      printf("%s memory:\n"
+             "    from physical addresses %s to %s\n"
+             "    size is %s bytes (%lld in decimal)\n",
+             mem_type, start_str, end_str, size_str,
+             (unsigned long long) size);
+
+      if (++i >= entries)
+         break;
+
+      printf("\n");
+    }
+ }
+
+/****************************************************************************
+ * mainboard_print_fn
+ *
+ * Display function for 'mainboard' item of LinuxBIOS table.
+ ****************************************************************************/
+static void mainboard_print_fn (const struct lb_record *rec)
+ { const struct lb_mainboard *p;
+
+   p = (const struct lb_mainboard *) rec;
+   printf("Vendor:      %s\n"
+          "Part number: %s\n",
+          &p->strings[p->vendor_idx],
+          &p->strings[p->part_number_idx]);
+ }
+
+/****************************************************************************
+ * cmos_opt_table_print_fn
+ *
+ * Display function for 'cmos_opt_table' item of LinuxBIOS table.
+ ****************************************************************************/
+static void cmos_opt_table_print_fn (const struct lb_record *rec)
+ {
+   const struct cmos_option_table *p;
+   const struct lb_record *cmos_item;
+   uint32_t bytes_processed, bytes_for_entries;
+   const char *q;
+
+   p = (const struct cmos_option_table *) rec;
+   q = ((const char *) p) + p->header_length;
+   bytes_for_entries = p->size - p->header_length;
+
+   printf("CMOS option table at physical address 0x%lx:\n"
+          "    tag:           0x%x (decimal: %d)\n"
+          "    size:          0x%x (decimal: %d)\n"
+          "    header_length: 0x%x (decimal: %d)\n\n",
+          vtophys(p), p->tag, p->tag, p->size, p->size, p->header_length,
+          p->header_length);
+
+   if (p->header_length > p->size)
+    { printf("Header length for CMOS option table is greater than the size "
+             "of the entire table including header!!!\n");
+      return;
+    }
+
+   if (bytes_for_entries == 0)
+    { printf("The CMOS option table is empty!!!\n");
+      return;
+    }
+
+   for (bytes_processed = 0; ; )
+    { cmos_item = (const struct lb_record *) &q[bytes_processed];
+
+      switch (cmos_item->tag)
+       { case LB_TAG_OPTION:
+            print_option_record((const struct cmos_entries *) cmos_item);
+            break;
+
+         case LB_TAG_OPTION_ENUM:
+            print_enum_record((const struct cmos_enums *) cmos_item);
+            break;
+
+         case LB_TAG_OPTION_DEFAULTS:
+            print_defaults_record((const struct cmos_defaults *) cmos_item);
+            break;
+
+         default:
+            print_unknown_record(cmos_item);
+            break;
+       }
+
+      bytes_processed += cmos_item->size;
+
+      if (bytes_processed >= bytes_for_entries)
+         break;
+
+      printf("\n");
+    }
+ }
+
+/****************************************************************************
+ * print_option_record
+ *
+ * Display "option" record from CMOS option table.
+ ****************************************************************************/
+static void print_option_record (const struct cmos_entries *cmos_entry)
+ { static const size_t S_BUFSIZE = 80;
+   char s[S_BUFSIZE];
+
+   switch (cmos_entry->config)
+    { case 'e':
+         strcpy(s, "ENUM");
+         break;
+
+      case 'h':
+         strcpy(s, "HEX");
+         break;
+
+      case 'r':
+         strcpy(s, "RESERVED");
+         break;
+
+      default:
+         snprintf(s, S_BUFSIZE, "UNKNOWN: value is 0x%x (decimal: %d)",
+                  cmos_entry->config, cmos_entry->config);
+         break;
+    }
+
+   printf("    OPTION record at physical address 0x%lx:\n"
+          "        tag:       0x%x (decimal: %d)\n"
+          "        size:      0x%x (decimal: %d)\n"
+          "        bit:       0x%x (decimal: %d)\n"
+          "        length:    0x%x (decimal: %d)\n"
+          "        config:    %s\n"
+          "        config_id: 0x%x (decimal: %d)\n"
+          "        name:      %s\n",
+          vtophys(cmos_entry), cmos_entry->tag, cmos_entry->tag,
+          cmos_entry->size, cmos_entry->size, cmos_entry->bit,
+          cmos_entry->bit, cmos_entry->length, cmos_entry->length, s,
+          cmos_entry->config_id, cmos_entry->config_id, cmos_entry->name);
+ }
+
+/****************************************************************************
+ * print_enum_record
+ *
+ * Display "enum" record from CMOS option table.
+ ****************************************************************************/
+static void print_enum_record (const struct cmos_enums *cmos_enum)
+ { printf("    ENUM record at physical address 0x%lx:\n"
+          "        tag:       0x%x (decimal: %d)\n"
+          "        size:      0x%x (decimal: %d)\n"
+          "        config_id: 0x%x (decimal: %d)\n"
+          "        value:     0x%x (decimal: %d)\n"
+          "        text:      %s\n",
+          vtophys(cmos_enum), cmos_enum->tag, cmos_enum->tag, cmos_enum->size,
+          cmos_enum->size, cmos_enum->config_id, cmos_enum->config_id,
+          cmos_enum->value, cmos_enum->value, cmos_enum->text);
+ }
+
+/****************************************************************************
+ * print_defaults_record
+ *
+ * Display "defaults" record from CMOS option table.
+ ****************************************************************************/
+static void print_defaults_record (const struct cmos_defaults *cmos_defaults)
+ { printf("    DEFAULTS record at physical address 0x%lx:\n"
+          "        tag:         0x%x (decimal: %d)\n"
+          "        size:        0x%x (decimal: %d)\n"
+          "        name_length: 0x%x (decimal: %d)\n"
+          "        name:        %s\n"
+          "        default_set:\n",
+          vtophys(cmos_defaults), cmos_defaults->tag, cmos_defaults->tag,
+          cmos_defaults->size, cmos_defaults->size,
+          cmos_defaults->name_length, cmos_defaults->name_length,
+          cmos_defaults->name);
+   hexdump(cmos_defaults->default_set, CMOS_IMAGE_BUFFER_SIZE,
+           vtophys(cmos_defaults->default_set), stdout, &format);
+ }
+
+/****************************************************************************
+ * print_unknown_record
+ *
+ * Display record of unknown type from CMOS option table.
+ ****************************************************************************/
+static void print_unknown_record (const struct lb_record *cmos_item)
+ { const char *data;
+
+   printf("    UNKNOWN record at physical address 0x%lx:\n"
+          "        tag:  0x%x (decimal: %d)\n"
+          "        size: 0x%x (decimal: %d)\n"
+          "        data:\n",
+          vtophys(cmos_item), cmos_item->tag, cmos_item->tag,
+          cmos_item->size, cmos_item->size);
+   data = ((const char *) cmos_item) + sizeof(*cmos_item);
+   hexdump(data, cmos_item->size - sizeof(*cmos_item), vtophys(data), stdout,
+           &format);
+ }
+
+/****************************************************************************
+ * option_checksum_print_fn
+ *
+ * Display function for 'option_checksum' item of LinuxBIOS table.
+ ****************************************************************************/
+static void option_checksum_print_fn (const struct lb_record *rec)
+ { struct cmos_checksum *p;
+
+   p = (struct cmos_checksum *) rec;
+   printf("CMOS checksum from bit %d to bit %d\n"
+          "at position %d is type %s.\n",
+          p->range_start, p->range_end, p->location,
+          (p->type == CHECKSUM_PCBIOS) ? "PC BIOS" : "NONE");
+ }
+
+/****************************************************************************
+ * string_print_fn
+ *
+ * Display function for a generic item of LinuxBIOS table that simply
+ * consists of a string.
+ ****************************************************************************/
+static void string_print_fn (const struct lb_record *rec)
+ { const struct lb_string *p;
+
+   p = (const struct lb_string *) rec;
+   printf("%s\n", p->string);
+ }
+
+/****************************************************************************
+ * uint64_to_hex_string
+ *
+ * Convert the 64-bit integer 'n' to its hexadecimal string representation,
+ * storing the result in 's'.  's' must point to a buffer at least 19 bytes
+ * long.  The result is displayed with as many leading zeros as needed to
+ * make a 16-digit hex number including a 0x prefix (example: the number 1
+ * will be displayed as "0x0000000000000001").
+ ****************************************************************************/
+static void uint64_to_hex_string (char str[], uint64_t n)
+ { int chars_printed;
+
+   str[0] = '0';
+   str[1] = 'x';
+
+   /* Print the result right-justified with leading spaces in a
+    * 16-character field. */
+   chars_printed = sprintf(&str[2], "%016llx", (unsigned long long) n);
+   assert(chars_printed == 16);
+ }
Index: lxbios/lbtable.h
===================================================================
--- lxbios/lbtable.h	(revision 0)
+++ lxbios/lbtable.h	(revision 0)
@@ -0,0 +1,43 @@
+/*****************************************************************************\
+ * lbtable.h
+ * $Id: lbtable.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_LBTABLE_H
+#define LXBIOS_LBTABLE_H
+
+#include "common.h"
+
+void get_lbtable (void);
+void get_layout_from_cmos_table (void);
+void dump_lbtable (void);
+void list_lbtable_choices (void);
+void list_lbtable_item (const char item[]);
+
+#endif  /* LXBIOS_LBTABLE_H */
Index: lxbios/hexdump.c
===================================================================
--- lxbios/hexdump.c	(revision 0)
+++ lxbios/hexdump.c	(revision 0)
@@ -0,0 +1,248 @@
+/*****************************************************************************\
+ * hexdump.c
+ * $Id: hexdump.c,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+\*****************************************************************************/
+
+#include "hexdump.h"
+
+/* hexdump.c
+ *
+ * Copyright (C) 2002
+ *     David S. Peterson.  All rights reserved.
+ *
+ * Author: David S. Peterson <dave_peterson@pobox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions, and the entire permission notice, including
+ *    the following disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions, and the entire permission notice,
+ *    including the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 3. The name(s) of the author(s) may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of the GNU
+ * General Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions.  (This clause is necessary due
+ * to a potential bad interaction between the GPL and the restrictions
+ * contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+static void addrprint (FILE *outfile, uint64_t address, int width);
+static void hexprint (FILE *outfile, unsigned char byte);
+static void charprint (FILE *outfile, unsigned char byte,
+                       unsigned char nonprintable,
+                       is_printable_fn_t is_printable_fn);
+
+/*--------------------------------------------------------------------------
+ * hexdump
+ *
+ * Write a hex dump of 'mem' to 'outfile'.
+ *
+ * parameters:
+ *     mem:             a pointer to the memory to display
+ *     bytes:           the number of bytes of data to display
+ *     addrprint_start: The address to associate with the first byte of
+ *                      data.  For instance, a value of 0 indicates that the
+ *                      first byte displayed should be labeled as byte 0.
+ *     outfile:         The place where the hex dump should be written.
+ *                      For instance, stdout or stderr may be passed here.
+ *     format:          A structure specifying how the hex dump should be
+ *                      formatted.
+ *--------------------------------------------------------------------------*/
+void hexdump (const void *mem, int bytes, uint64_t addrprint_start,
+              FILE *outfile, const hexdump_format_t *format)
+ { int bytes_left, index, i;
+   const unsigned char *p;
+   is_printable_fn_t is_printable_fn;
+
+   /* Quietly return if the caller asks us to do something unreasonable. */
+   if ((format->bytes_per_line <= 0) || (bytes < 0))
+      return;
+
+   is_printable_fn = format->is_printable_fn;
+
+   if (is_printable_fn == NULL)
+      is_printable_fn = default_is_printable_fn;
+
+   p = (const unsigned char *) mem;
+   index = 0;
+
+   /* Each iteration handles one full line of output.  When loop terminates,
+    * the number of remaining bytes to display (if any) will not be enough to
+    * fill an entire line.
+    */
+   for (bytes_left = bytes;
+        bytes_left >= format->bytes_per_line;
+        bytes_left -= format->bytes_per_line)
+    { /* print start address for current line */
+      fprintf(outfile, format->indent);
+      addrprint(outfile, addrprint_start + index, format->addrprint_width);
+      fprintf(outfile, format->sep1);
+
+      /* display the bytes in hex */
+      for (i = 0; ; )
+       { hexprint(outfile, p[index++]);
+
+         if (++i >= format->bytes_per_line)
+            break;
+
+         fprintf(outfile, format->sep2);
+       }
+
+      index -= format->bytes_per_line;
+      fprintf(outfile, format->sep3);
+
+      /* display the bytes as characters */
+      for (i = 0; i < format->bytes_per_line; i++)
+         charprint(outfile, p[index++], format->nonprintable,
+                   is_printable_fn);
+
+      fprintf(outfile, "\n");
+    }
+
+   if (bytes_left == 0)
+      return;
+
+   /* print start address for last line */
+   fprintf(outfile, format->indent);
+   addrprint(outfile, addrprint_start + index, format->addrprint_width);
+   fprintf(outfile, format->sep1);
+
+   /* display bytes for last line in hex */
+   for (i = 0; i < bytes_left; i++)
+    { hexprint(outfile, p[index++]);
+      fprintf(outfile, format->sep2);
+    }
+
+   index -= bytes_left;
+
+   /* pad the rest of the hex byte area with spaces */
+   for (; ; )
+    { fprintf(outfile, "  ");
+
+      if (++i >= format->bytes_per_line)
+         break;
+
+      fprintf(outfile, format->sep2);
+    }
+
+   fprintf(outfile, format->sep3);
+
+   /* display bytes for last line as characters */
+   for (i = 0; i < bytes_left; i++)
+      charprint(outfile, p[index++], format->nonprintable, is_printable_fn);
+
+   /* pad the rest of the character area with spaces */
+   for (; i < format->bytes_per_line; i++)
+      fprintf(outfile, " ");
+
+   fprintf(outfile, "\n");
+ }
+
+/*--------------------------------------------------------------------------
+ * default_is_printable_fn
+ *
+ * Determine whether the input character is printable.  The proper behavior
+ * for this type of function may be system-dependent.  This function takes a
+ * conservative approach.  If it is not adequate for your purposes, you can
+ * write your own.
+ *
+ * parameters:
+ *     c: the input character
+ *
+ * return value:
+ *     Return 1 if the input character is printable.  Otherwise return 0.
+ *--------------------------------------------------------------------------*/
+int default_is_printable_fn (unsigned char c)
+ { return (c >= 0x20) && (c <= 0x7e); }
+
+/*--------------------------------------------------------------------------
+ * addrprint
+ *
+ * Display an address as a hexadecimal number.
+ *
+ * parameters:
+ *     outfile: the place where the output should be written
+ *     address: the address to display
+ *     width:   The number of bytes wide the address should be displayed as.
+ *              Must be a value from 1 to 8.
+ *--------------------------------------------------------------------------*/
+static void addrprint (FILE *outfile, uint64_t address, int width)
+ { char s[17];
+   int i;
+
+   /* force the user's input to be valid */
+   if (width < 1)
+      width = 1;
+   else if (width > 8)
+      width = 8;
+
+   /* convert address to string */
+   sprintf(s, "%016llx", (unsigned long long) address);
+
+   /* write it out, with colons separating consecutive 16-bit chunks of the
+    * address
+    */
+   for (i = 16 - (2 * width); ; )
+    { fprintf(outfile, "%c", s[i]);
+
+      if (++i >= 16)
+         break;
+
+      if ((i % 4) == 0)
+         fprintf(outfile, ":");
+    }
+ }
+
+/*--------------------------------------------------------------------------
+ * hexprint
+ *
+ * Display a byte as a two digit hex value.
+ *
+ * parameters:
+ *     outfile: the place where the output should be written
+ *     byte:    the byte to display
+ *--------------------------------------------------------------------------*/
+static void hexprint (FILE *outfile, unsigned char byte)
+ { static const char tbl[] =
+    { '0', '1', '2', '3', '4', '5', '6', '7',
+      '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+    };
+
+   fprintf(outfile, "%c%c", tbl[byte >> 4], tbl[byte & 0x0f]);
+ }
+
+/*--------------------------------------------------------------------------
+ * charprint
+ *
+ * Display a byte as its character representation.
+ *
+ * parameters:
+ *     outfile:         the place where the output should be written
+ *     byte:            the byte to display
+ *     nonprintable:    a substitute character to display if the byte
+ *                      represents a nonprintable character
+ *     is_printable_fn: a function that returns a boolean value indicating
+ *                      whether a given character is printable
+ *--------------------------------------------------------------------------*/
+static void charprint (FILE *outfile, unsigned char byte,
+                       unsigned char nonprintable,
+                       is_printable_fn_t is_printable_fn)
+ { fprintf(outfile, "%c", is_printable_fn(byte) ? byte : nonprintable); }
Index: lxbios/lxbios.1
===================================================================
--- lxbios/lxbios.1	(revision 0)
+++ lxbios/lxbios.1	(revision 0)
@@ -0,0 +1,255 @@
+.\"***************************************************************************\
+.\" lxbios.1
+.\" $Id: lxbios.1,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+.\"***************************************************************************
+.\"  Copyright (C) 2002, 2003 The Regents of the University of California.
+.\"  Produced at the Lawrence Livermore National Laboratory.
+.\"  Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+.\"  UCRL-CODE-2003-012
+.\"  All rights reserved.
+.\"
+.\"  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+.\"  parameters and displaying information from the LinuxBIOS table.
+.\"  For details, see <http://www.llnl.gov/linux/lxbios/>.
+.\"
+.\"  Please also read the file DISCLAIMER which is included in this software
+.\"  distribution.
+.\"
+.\"  This program is free software; you can redistribute it and/or modify it
+.\"  under the terms of the GNU General Public License (as published by the
+.\"  Free Software Foundation) version 2, dated June 1991.
+.\"
+.\"  This program is distributed in the hope that it will be useful, but
+.\"  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+.\"  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+.\"  conditions of the GNU General Public License for more details.
+.\"
+.\"  You should have received a copy of the GNU General Public License along
+.\"  with this program; if not, write to the Free Software Foundation, Inc.,
+.\"  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+.\"***************************************************************************/
+.TH LXBIOS 1 "December 2005" Linux
+.SH NAME
+lxbios \- read/write LinuxBIOS-related information
+.SH SYNOPSIS
+.B "lxbios [OPTS] [-n] -r NAME"
+.br
+.B "lxbios [OPTS] -e NAME"
+.br
+.B "lxbios [OPTS] -a"
+.br
+.B "lxbios [OPTS] -w NAME=VALUE"
+.br
+.B "lxbios [OPTS] -p INPUT_FILE"
+.br
+.B "lxbios [OPTS] -i"
+.br
+.B "lxbios [OPTS] -c [VALUE]"
+.br
+.B "lxbios [OPTS] -l [ARG]"
+.br
+.B "lxbios [OPTS] -d"
+.br
+.B "lxbios [OPTS] -Y"
+.br
+.B "lxbios [OPTS] -b OUTPUT_FILE"
+.br
+.B "lxbios [OPTS] -B INPUT_FILE"
+.br
+.B "lxbios [OPTS] -x"
+.br
+.B "lxbios [OPTS] -X DUMPFILE"
+.br
+.B "lxbios [OPTS] -v"
+.br
+.B "lxbios [OPTS] -h"
+.SH DESCRIPTION
+.B "lxbios"
+is a utility for reading/writing LinuxBIOS parameters and displaying
+information from the LinuxBIOS table.
+
+The LinuxBIOS table resides in low physical memory.  It is created at boot
+time by LinuxBIOS, and contains various system information such as the type
+of mainboard in use.  It specifies locations in the CMOS (nonvolatile RAM)
+where the LinuxBIOS parameters are stored.
+
+This program is intended for x86-based systems that use LinuxBIOS.  For
+information about LinuxBIOS, see
+.br
+http://www.linuxbios.org/.
+.SH PARAMETERS
+.TP
+.B "[-n] -r NAME"
+Show the value of the LinuxBIOS parameter given by
+.B "NAME."
+If
+.B "-n"
+is specified, show only the value.  Otherwise show both parameter name and
+value.
+.TP
+.B "-e NAME"
+Show all possible values for parameter given by
+.B "NAME."
+.TP
+.B "-a"
+Show the names and values for all LinuxBIOS parameters.
+.TP
+.B "-w NAME=VALUE"
+Assign
+.B "VALUE"
+to LinuxBIOS parameter given by
+.B "NAME."
+.TP
+.B "-p INPUT_FILE"
+Assign values to LinuxBIOS parameters according to the contents of
+.B "INPUT_FILE."
+The format of this file is described below.
+.TP
+.B "-i"
+This is similar to the
+.B "-p"
+option, except that the contents of the input file are taken from standard
+input.
+.TP
+.B "-c [VALUE]"
+If
+.B "VALUE"
+is present then set the CMOS checksum for the LinuxBIOS parameters to
+.B "VALUE." 
+Otherwise, show the checksum value.
+.TP
+.B "-l [ARG]"
+If
+.B "ARG"
+is present then show information from the LinuxBIOS table as specified by
+.B "ARG."
+Otherwise show all possible values for
+.B "ARG."
+.TP
+.B "-d"
+Do a low-level dump of the LinuxBIOS table.
+.TP
+.B "-Y"
+Write CMOS layout information to standard output.  If redirected to a file,
+the layout information may be used as input for the
+.B "'-y LAYOUT_FILE'"
+option (see below).
+.TP
+.B "-b OUTPUT_FILE"
+Write the contents of CMOS memory to the binary file
+.B "OUTPUT_FILE."
+The first 14 bytes of
+.B "OUTPUT_FILE"
+do not contain actual CMOS data, and are always written as zeros.  This is
+because the first 14 bytes of the CMOS area do not contain CMOS memory.  These
+bytes are involved with the functioning of the real time clock.
+.TP
+.B "-B INPUT_FILE"
+Read binary data from
+.B "INPUT_FILE"
+and write the data to CMOS memory.  The first 14 bytes of
+.B "INPUT_FILE"
+are skipped and data is written to CMOS starting at the 15th byte of the CMOS
+area.  This is because the first 14 bytes of the CMOS area do not contain CMOS
+memory.  These bytes are involved with the functioning of the real time clock.
+.TP
+.B "-x"
+Show a hex dump of all CMOS data.  The first 14 bytes of the dump do not
+contain actual CMOS data, and are always shown as zeros.  This is because the
+first 14 bytes of the CMOS area do not contain CMOS memory.  These bytes are
+involved with the functioning of the real time clock.
+.TP
+.B "-X DUMPFILE"
+Read binary data from
+.B "DUMPFILE"
+(presumably a CMOS dumpfile created using the
+.B "-b OUTPUT_FILE"
+option) and show a hex dump of the data.
+.TP
+.B "-v"
+Show version information for this program.
+.TP
+.B "-h"
+Show a help message for this program.
+.SH "OPTIONS"
+In all cases above,
+.B "[OPTS]"
+evaluates to the following:
+
+.B "    [-y LAYOUT_FILE | -t]"
+
+The
+.B "'-y LAYOUT_FILE'"
+option tells lxbios to obtain CMOS layout information from the contents of
+.B "LAYOUT_FILE."
+Likewise, the
+.B "'-t'"
+option tells lxbios to obtain CMOS layout information from the CMOS option
+table (contained within the LinuxBIOS table).  If neither option is
+specified, the CMOS option table is used by default.
+.B "LAYOUT_FILE"
+follows the format of the
+.B "cmos.layout"
+files provided by LinuxBIOS.
+
+If the LinuxBIOS installed on your system was built without specifying
+.B "HAVE_OPTION_TABLE,"
+then the LinuxBIOS table will not contain a CMOS option table.  In this case,
+the
+.B "'-y LAYOUT_FILE'"
+option must be used.
+
+These two options are silently ignored when used in combination with other
+options (such as
+.B "-h,"
+for instance) for which they are not applicable.
+.SH FILE FORMAT
+For the
+.B "-p"
+option,
+.B "INPUT_FILE"
+must consist of a sequence of lines such that each line is either a blank
+line, a comment, or an assignment.  A blank line consists only of zero or
+more whitespace characters (spaces and tabs).  A comment is constructed as
+follows:
+
+.B "    [ws]#[text]"
+
+Here,
+.B "[ws]"
+indicates optional whitespace characters and
+.B "[text]"
+indicates optional text.  Blank lines and comments are both ignored.  An
+assignment is constructed as follows:
+
+.B "    [ws]NAME[ws]=[ws]VALUE[ws]"
+
+Here,
+.B "NAME"
+is the name of a LinuxBIOS parameter and
+.B "VALUE"
+is the value that will be assigned to
+.B "NAME."
+.B "VALUE"
+is allowed to contain whitespace characters, but it must begin and end with
+nonwhitespace characters.  Note that each comment must appear on a line by
+itself.  If you attempt to add a comment to the end of an assignment, then the
+comment will be interpreted as part of
+.B "VALUE."
+It is useful to observe that the output produced by both the
+.B "-a"
+and the
+.B "'[-n] NAME'"
+options (without
+.B "-n"
+specified) adheres to this file format.
+.SH BUGS
+This program does not implement any type of synchronization to ensure that
+different processes don't stomp on each other when trying to access the
+nonvolatile RAM simultaneously.  Therefore, corruption of the BIOS parameter
+values may occur if multiple instances of this program are executed
+concurrently.
+.SH AUTHORS
+David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>
+.br
+Stefan Reinauer <stepan@openbios.org>
Index: lxbios/hexdump.h
===================================================================
--- lxbios/hexdump.h	(revision 0)
+++ lxbios/hexdump.h	(revision 0)
@@ -0,0 +1,132 @@
+/*****************************************************************************\
+ * hexdump.h
+ * $Id: hexdump.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+\*****************************************************************************/
+
+#ifndef _HEXDUMP_H
+#define _HEXDUMP_H
+
+/* hexdump.h
+ *
+ * Copyright (C) 2002
+ *     David S. Peterson.  All rights reserved.
+ *
+ * Author: David S. Peterson <dave_peterson@pobox.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions, and the entire permission notice, including
+ *    the following disclaimer of warranties.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions, and the entire permission notice,
+ *    including the following disclaimer in the documentation and/or other
+ *    materials provided with the distribution.
+ * 3. The name(s) of the author(s) may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
+ *
+ * ALTERNATIVELY, this product may be distributed under the terms of the GNU
+ * General Public License, in which case the provisions of the GPL are
+ * required INSTEAD OF the above restrictions.  (This clause is necessary due
+ * to a potential bad interaction between the GPL and the restrictions
+ * contained in a BSD-style copyright.)
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <stdio.h>
+
+typedef int (*is_printable_fn_t) (unsigned char c);
+
+/*--------------------------------------------------------------------------
+ * hexdump_format_t
+ *
+ * This specifies how the output of the 'hexdump' function should look.
+ *
+ * fields:
+ *     bytes_per_line:  the number of data bytes to display per line of
+ *                      output
+ *     addrprint_width: Each line of output begins with the address of the
+ *                      first data byte displayed on that line.  This
+ *                      specifies the number of bytes wide the address
+ *                      should be displayed as.  This value must be from 1
+ *                      to 8.
+ *     indent:          This is a string to display at the start of each
+ *                      output line.  Its purpose is to indent the output.
+ *     sep1:            This is a string to display between the address and
+ *                      the bytes of data displayed in hex.  It serves as a
+ *                      separator.
+ *     sep2:            This is a string to display between individual hex
+ *                      values.  It serves as a separator.
+ *     sep3:            This is a string to display between the bytes of
+ *                      data in hex and the bytes of data displayed as
+ *                      characters.  It serves as a separator.
+ *     nonprintable:    This is a substitute character to display in place
+ *                      of nonprintable characters.
+ *     is_printable_fn: This is a user-supplied function that takes a byte
+ *                      value as input and returns a boolean value
+ *                      indicating whether the corresponding character is
+ *                      printable.  A value of NULL will cause
+ *                      default_is_printable_fn to be used.
+ *--------------------------------------------------------------------------*/
+typedef struct
+ { int bytes_per_line;
+   int addrprint_width;
+   const char *indent;
+   const char *sep1;
+   const char *sep2;
+   const char *sep3;
+   unsigned char nonprintable;
+   is_printable_fn_t is_printable_fn;
+ }
+hexdump_format_t;
+
+/*--------------------------------------------------------------------------
+ * hexdump
+ *
+ * Write a hex dump of 'mem' to 'outfile'.
+ *
+ * parameters:
+ *     mem:             a pointer to the memory to display
+ *     bytes:           the number of bytes of data to display
+ *     addrprint_start: The address to associate with the first byte of
+ *                      data.  For instance, a value of 0 indicates that the
+ *                      first byte displayed should be labeled as byte 0.
+ *     outfile:         The place where the hex dump should be written.
+ *                      For instance, stdout or stderr may be passed here.
+ *     format:          A structure specifying how the hex dump should be
+ *                      formatted.
+ *--------------------------------------------------------------------------*/
+void hexdump (const void *mem, int bytes, uint64_t addrprint_start,
+              FILE *outfile, const hexdump_format_t *format);
+
+/*--------------------------------------------------------------------------
+ * default_is_printable_fn
+ *
+ * Determine whether the input character is printable.  The proper behavior
+ * for this type of function may be system-dependent.  This function appears
+ * to work well on a Linux system.  However, if it is not adequate for your
+ * purposes, you can write your own.
+ *
+ * parameters:
+ *     c: the input character
+ *
+ * return value:
+ *     Return 1 if the input character is printable.  Otherwise return 0.
+ *--------------------------------------------------------------------------*/
+int default_is_printable_fn (unsigned char c);
+
+#endif  /* _HEXDUMP_H */
Index: lxbios/cmos_ops.c
===================================================================
--- lxbios/cmos_ops.c	(revision 0)
+++ lxbios/cmos_ops.c	(revision 0)
@@ -0,0 +1,221 @@
+/*****************************************************************************\
+ * cmos_ops.c
+ * $Id: cmos_ops.c,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include "common.h"
+#include "cmos_ops.h"
+#include "cmos_lowlevel.h"
+
+static int prepare_cmos_op_common (const cmos_entry_t *e);
+
+/****************************************************************************
+ * prepare_cmos_op_common
+ *
+ * Perform a few checks common to both reads and writes.
+ ****************************************************************************/
+static int prepare_cmos_op_common (const cmos_entry_t *e)
+ { int result;
+
+   if (e->config == CMOS_ENTRY_RESERVED)
+      /* Access to reserved parameters is not permitted. */
+      return CMOS_OP_RESERVED;
+
+   if ((result = verify_cmos_op(e->bit, e->length)) != OK)
+      return result;
+
+   assert(e->length > 0);
+   return OK;
+ }
+
+/****************************************************************************
+ * prepare_cmos_read
+ *
+ * The caller wishes to read a CMOS parameter represented by 'e'.  Perform
+ * sanity checking on 'e'.  If a problem was found with e, return an error
+ * code.  Else return OK.
+ ****************************************************************************/
+int prepare_cmos_read (const cmos_entry_t *e)
+ { int result;
+
+   if ((result = prepare_cmos_op_common(e)) != OK)
+      return result;
+
+   switch (e->config)
+    { case CMOS_ENTRY_ENUM:
+      case CMOS_ENTRY_HEX:
+         break;
+
+      default:
+         BUG();
+    }
+
+   return OK;
+ }
+
+/****************************************************************************
+ * prepare_cmos_write
+ *
+ * The caller wishes to set a CMOS parameter represented by 'e' to a value
+ * whose string representation is stored in 'value_str'.  Perform sanity
+ * checking on 'value_str'.  On error, return an error code.  Else store the
+ * numeric equivalent of 'value_str' in '*value' and return OK.
+ ****************************************************************************/
+int prepare_cmos_write (const cmos_entry_t *e, const char value_str[],
+                        unsigned long long *value)
+ { const cmos_enum_t *q;
+   unsigned long long out;
+   const char *p;
+   int negative, result, found_one;
+
+   if ((result = prepare_cmos_op_common(e)) != OK)
+      return result;
+
+   switch (e->config)
+    { case CMOS_ENTRY_ENUM:
+         /* Make sure the user's input corresponds to a valid option. */
+         for (q = first_cmos_enum_id(e->config_id), found_one = 0;
+              q != NULL;
+              q = next_cmos_enum_id(q))
+          { found_one = 1;
+
+            if (!strncmp(q->text, value_str, CMOS_MAX_TEXT_LENGTH))
+               break;
+          }
+
+         if (!found_one)
+            return CMOS_OP_NO_MATCHING_ENUM;
+
+         if (q == NULL)
+            return CMOS_OP_BAD_ENUM_VALUE;
+
+         out = q->value;
+         break;
+
+      case CMOS_ENTRY_HEX:
+         /* See if the first character of 'value_str' (excluding any initial
+          * whitespace) is a minus sign.
+          */
+         for (p = value_str; isspace(*p); p++);
+         negative = (*p == '-');
+
+         out = strtoull(value_str, (char **) &p, 0);
+
+         if (*p)
+            return CMOS_OP_INVALID_INT;
+
+         /* If we get this far, the user specified a valid integer.  However
+          * we do not currently support the use of negative numbers as CMOS
+          * parameter values.
+          */
+         if (negative)
+            return CMOS_OP_NEGATIVE_INT;
+
+         break;
+
+      default:
+         BUG();
+    }
+
+   if ((e->length < (8 * sizeof(*value))) &&
+       (out >= (1ull << e->length)))
+      return CMOS_OP_VALUE_TOO_WIDE;
+
+   *value = out;
+   return OK;
+ }
+
+/****************************************************************************
+ * cmos_checksum_read
+ *
+ * Read the checksum for the LinuxBIOS parameters stored in CMOS and return
+ * this value.
+ ****************************************************************************/
+uint16_t cmos_checksum_read (void)
+ { uint16_t lo, hi;
+
+   /* The checksum is stored in a big-endian format. */
+   hi = cmos_read_byte(cmos_checksum_index);
+   lo = cmos_read_byte(cmos_checksum_index + 1);
+   return (hi << 8) + lo;
+ }
+
+/****************************************************************************
+ * cmos_checksum_write
+ *
+ * Set the checksum for the LinuxBIOS parameters stored in CMOS to
+ * 'checksum'.
+ ****************************************************************************/
+void cmos_checksum_write (uint16_t checksum)
+ { unsigned char lo, hi;
+
+   /* The checksum is stored in a big-endian format. */
+   hi = (unsigned char) (checksum >> 8);
+   lo = (unsigned char) (checksum & 0x00ff);
+   cmos_write_byte(cmos_checksum_index, hi);
+   cmos_write_byte(cmos_checksum_index + 1, lo);
+ }
+
+/****************************************************************************
+ * cmos_checksum_compute
+ *
+ * Compute a checksum for the LinuxBIOS parameter values currently stored in
+ * CMOS and return this checksum.
+ ****************************************************************************/
+uint16_t cmos_checksum_compute (void)
+ { unsigned i, sum;
+
+   sum = 0;
+
+   for (i = cmos_checksum_start; i <= cmos_checksum_end; i++)
+      sum += cmos_read_byte(i);
+
+   return ~((uint16_t) (sum & 0xffff));
+ }
+
+/****************************************************************************
+ * cmos_checksum_verify
+ *
+ * Verify that the LinuxBIOS CMOS checksum is valid.  If checksum is not
+ * valid then print warning message and exit.
+ ****************************************************************************/
+void cmos_checksum_verify (void)
+ { uint16_t computed, actual;
+
+   set_iopl(3);
+   computed = cmos_checksum_compute();
+   actual = cmos_checksum_read();
+   set_iopl(0);
+
+   if (computed != actual)
+    { fprintf(stderr, "%s: Warning: LinuxBIOS CMOS checksum is bad.\n",
+              prog_name);
+      exit(1);
+    }
+ }
Index: lxbios/COPYING
===================================================================
--- lxbios/COPYING	(revision 0)
+++ lxbios/COPYING	(revision 0)
@@ -0,0 +1,339 @@
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+                          675 Mass Ave, Cambridge, MA 02139, USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+			    Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+		    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+			    NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+		     END OF TERMS AND CONDITIONS
+
+	Appendix: How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) 19yy  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) 19yy name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Library General
+Public License instead of this License.
Index: lxbios/cmos_ops.h
===================================================================
--- lxbios/cmos_ops.h	(revision 0)
+++ lxbios/cmos_ops.h	(revision 0)
@@ -0,0 +1,53 @@
+/*****************************************************************************\
+ * cmos_ops.h
+ * $Id: cmos_ops.h,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_CMOS_OPS_H
+#define LXBIOS_CMOS_OPS_H
+
+#include "common.h"
+#include "layout.h"
+
+#define CMOS_OP_BAD_ENUM_VALUE (CMOS_OP_RESULT_START + 0)
+#define CMOS_OP_NEGATIVE_INT (CMOS_OP_RESULT_START + 1)
+#define CMOS_OP_INVALID_INT (CMOS_OP_RESULT_START + 2)
+#define CMOS_OP_RESERVED (CMOS_OP_RESULT_START + 3)
+#define CMOS_OP_VALUE_TOO_WIDE (CMOS_OP_RESULT_START + 4)
+#define CMOS_OP_NO_MATCHING_ENUM (CMOS_OP_RESULT_START + 5)
+
+int prepare_cmos_read (const cmos_entry_t *e);
+int prepare_cmos_write (const cmos_entry_t *e, const char value_str[],
+                        unsigned long long *value);
+uint16_t cmos_checksum_read (void);
+void cmos_checksum_write (uint16_t checksum);
+uint16_t cmos_checksum_compute (void);
+void cmos_checksum_verify (void);
+
+#endif  /* LXBIOS_CMOS_OPS_H */
Index: lxbios/Makefile
===================================================================
--- lxbios/Makefile	(revision 0)
+++ lxbios/Makefile	(revision 0)
@@ -0,0 +1,28 @@
+# $Id: Makefile,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+
+PROJECT = lxbios
+CC = gcc
+CFLAGS = -O2 -W -Wall
+LDFLAGS =
+OBJS = common.o compute_ip_checksum.o hexdump.o cmos_lowlevel.o \
+       reg_expr.o layout.o layout_file.o lbtable.o cmos_ops.o input_file.o \
+       opts.o lxbios.o
+HEADERS = common.h ip_checksum.h linuxbios_tables.h hexdump.h \
+          cmos_lowlevel.h reg_expr.h layout.h layout_file.h lbtable.h \
+          cmos_ops.h input_file.h opts.h
+
+all: lxbios man
+
+lxbios: $(OBJS)
+	$(CC) $(LDFLAGS) -o $@ $(OBJS)
+
+man: lxbios.1.gz
+
+$(OBJS): $(HEADERS)
+
+lxbios.1.gz: lxbios.1
+	gzip -c --best lxbios.1 > lxbios.1.gz
+
+clean:
+	rm -f *.o lxbios lxbios.1.gz
+
Index: lxbios/input_file.c
===================================================================
--- lxbios/input_file.c	(revision 0)
+++ lxbios/input_file.c	(revision 0)
@@ -0,0 +1,280 @@
+/*****************************************************************************\
+ * input_file.c
+ * $Id: input_file.c,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include "common.h"
+#include "input_file.h"
+#include "layout.h"
+#include "cmos_ops.h"
+#include "cmos_lowlevel.h"
+#include "reg_expr.h"
+
+static int get_input_file_line (FILE *f, char line[], int line_buf_size);
+static unsigned long long try_prepare_cmos_write (const cmos_entry_t *e,
+                                                  const char value_str[]);
+
+/* matches either a blank line or a comment line */
+static const char blank_or_comment_regex[] =
+   /* a blank line */
+   "(^[[:space:]]+$)"
+
+   "|"  /* or ... */
+
+   /* a line consisting of: optional whitespace followed by */
+   "(^[[:space:]]*"
+   /* a '#' character and optionally, additional characters */
+   "#.*$)";
+
+/* matches an assignment line */
+const char assignment_regex[] =
+   /* optional whitespace */
+   "^[[:space:]]*"
+   /* followed by a LinuxBIOS parameter name */
+   "([^[:space:]]+)"
+   /* followed by optional whitespace */
+   "[[:space:]]*"
+   /* followed by an '=' character */
+   "="
+   /* followed by optional whitespace */
+   "[[:space:]]*"
+   /* followed by a value that may contain embedded whitespace */
+   "([^[:space:]]+([[:space:]]+[^[:space:]]+)*)+"
+   /* followed by optional whitespace */
+   "[[:space:]]*$";
+
+static int line_num;
+
+/****************************************************************************
+ * process_input_file
+ *
+ * Read the contents of file 'f' and return a pointer to a list of pending
+ * write operations.  Perform sanity checking on all write operations and
+ * exit with an error message if there is a problem.
+ ****************************************************************************/
+cmos_write_t * process_input_file (FILE *f)
+ {
+   static const int LINE_BUF_SIZE = 256;
+   static const size_t N_MATCHES = 4;
+   char line[LINE_BUF_SIZE];
+   const char *name, *value;
+   cmos_write_t *list, *item, **p;
+   regex_t blank_or_comment, assignment;
+   regmatch_t match[N_MATCHES];
+   const cmos_entry_t *e;
+
+   list = NULL;
+   p = &list;
+
+   compile_reg_exprs(REG_EXTENDED | REG_NEWLINE, 2, blank_or_comment_regex,
+                     &blank_or_comment, assignment_regex, &assignment);
+
+   /* each iteration processes one line from input file */
+   for (line_num = 1;
+        get_input_file_line(f, line, LINE_BUF_SIZE) == OK;
+        line_num++)
+    { /* skip comments and blank lines */
+      if (!regexec(&blank_or_comment, line, 0, NULL, 0))
+         continue;
+
+      /* Is this a valid assignment line?  If not, then it's a syntax
+       * error.
+       */
+      if (regexec(&assignment, line, N_MATCHES, match, 0))
+       { fprintf(stderr, "%s: Syntax error on line %d of input file.\n",
+                 prog_name, line_num);
+         exit(1);
+       }
+
+      /* OK, we found an assignment.  Break the line into substrings
+       * representing the lefthand and righthand sides of the assignment.
+       */
+      line[match[1].rm_eo] = '\0';
+      line[match[2].rm_eo] = '\0';
+      name = &line[match[1].rm_so];
+      value = &line[match[2].rm_so];
+
+      /* now look up the LinuxBIOS parameter name */
+      if (is_checksum_name(name) || (e = find_cmos_entry(name)) == NULL)
+       { fprintf(stderr, "%s: Error on line %d of input file: CMOS parameter "
+                 "%s not found.\n", prog_name, line_num, name);
+         exit(1);
+       }
+
+      /* At this point, we figure out what numeric value needs to be written
+       * to which location.  At the same time, we perform sanity checking on
+       * the write operation.
+       */
+
+      if ((item = (cmos_write_t *) malloc(sizeof(*item))) == NULL)
+         out_of_memory();
+
+      item->bit = e->bit;
+      item->length = e->length;
+      item->value = try_prepare_cmos_write(e, value);
+
+      /* Append write operation to pending write list. */
+      item->next = NULL;
+      *p = item;
+      p = &item->next;
+    }
+
+   free_reg_exprs(2, &blank_or_comment, &assignment);
+   return list;
+ }
+
+/****************************************************************************
+ * do_cmos_writes
+ *
+ * 'list' is a linked list of pending CMOS write operations that have passed
+ * all sanity checks.  Perform all write operations, destroying the list as
+ * we go.
+ ****************************************************************************/
+void do_cmos_writes (cmos_write_t *list)
+ { cmos_write_t *item;
+
+   set_iopl(3);
+
+   while (list != NULL)
+    { item = list;
+      list = item->next;
+      cmos_write(item->bit, item->length, item->value);
+      free(item);
+    }
+
+   cmos_checksum_write(cmos_checksum_compute());
+   set_iopl(0);
+ }
+
+/****************************************************************************
+ * get_input_file_line
+ *
+ * Get a line of input from file 'f'.  Store result in 'line' which is an
+ * array of 'line_buf_size' bytes.  Return OK on success or an error code on
+ * error.
+ ****************************************************************************/
+static int get_input_file_line (FILE *f, char line[], int line_buf_size)
+ { switch (get_line_from_file(f, line, line_buf_size))
+    { case OK:
+         return OK;
+
+      case LINE_EOF:
+         return LINE_EOF;
+
+      case LINE_TOO_LONG:
+         fprintf(stderr, "%s: Error on line %d of input file: Maximum line "
+                 "length exceeded.  Max is %d characters.\n", prog_name,
+                 line_num, line_buf_size - 2);
+         break;
+
+      default:
+         BUG();
+    }
+
+   exit(1);
+   return 1;  /* keep compiler happy */
+ }
+
+/****************************************************************************
+ * try_prepare_cmos_write
+ *
+ * Attempt to convert 'value_str' to an integer representation for storage in
+ * CMOS memory.  On success, return the converted value.  On error, exit with
+ * an error message.
+ ****************************************************************************/
+static unsigned long long try_prepare_cmos_write (const cmos_entry_t *e,
+                                                  const char value_str[])
+ { unsigned long long value;
+
+   switch (prepare_cmos_write(e, value_str, &value))
+    { case OK:
+         return value;
+
+      case CMOS_OP_BAD_ENUM_VALUE:
+         fprintf(stderr, "%s: Error on line %d of input file: Bad value for "
+                 "parameter %s.", prog_name, line_num, e->name);
+         break;
+
+      case CMOS_OP_NEGATIVE_INT:
+         fprintf(stderr, "%s: Error on line %d of input file: This program "
+                 "does not support assignment of negative numbers to "
+                 "LinuxBIOS parameters.", prog_name, line_num);
+         break;
+
+      case CMOS_OP_INVALID_INT:
+         fprintf(stderr, "%s: Error on line %d of input file: %s is not a "
+                 "valid integer.", prog_name, line_num, value_str);
+         break;
+
+      case CMOS_OP_RESERVED:
+         fprintf(stderr, "%s: Error on line %d of input file: Can not modify "
+                 "reserved LinuxBIOS parameter %s.", prog_name, line_num,
+                 e->name);
+         break;
+
+      case CMOS_OP_VALUE_TOO_WIDE:
+         fprintf(stderr, "%s: Error on line %d of input file: Can not write "
+                 "value %s to CMOS parameter %s that is only %d bits wide.",
+                 prog_name, line_num, value_str, e->name, e->length);
+         break;
+
+      case CMOS_OP_NO_MATCHING_ENUM:
+         fprintf(stderr, "%s: LinuxBIOS parameter %s has no matching enums.",
+                 prog_name, e->name);
+         break;
+
+      case CMOS_AREA_OUT_OF_RANGE:
+         fprintf(stderr, "%s: The CMOS area specified by the layout info for "
+                 "LinuxBIOS parameter %s is out of range.", prog_name,
+                 e->name);
+         break;
+
+      case CMOS_AREA_OVERLAPS_RTC:
+         fprintf(stderr, "%s: The CMOS area specified by the layout info for "
+                 "LinuxBIOS parameter %s overlaps the realtime clock area.",
+                 prog_name, e->name);
+         break;
+
+      case CMOS_AREA_TOO_WIDE:
+         fprintf(stderr, "%s: The CMOS area specified by the layout info for "
+                 "LinuxBIOS parameter %s is too wide.",
+                 prog_name, e->name);
+         break;
+
+      default:
+         fprintf(stderr,
+                 "%s: Unknown error encountered while attempting to modify "
+                 "LinuxBIOS parameter %s.", prog_name, e->name);
+         break;
+    }
+
+   fprintf(stderr, "  No CMOS writes performed.\n");
+   exit(1);
+   return 0;  /* keep compiler happy */
+ }
Index: lxbios/ip_checksum.h
===================================================================
--- lxbios/ip_checksum.h	(revision 0)
+++ lxbios/ip_checksum.h	(revision 0)
@@ -0,0 +1,16 @@
+/*****************************************************************************\
+ * ip_checksum.h
+ * $Id: ip_checksum.h,v 1.1.1.1 2005/12/02 22:35:19 dsp_llnl Exp $
+\*****************************************************************************/
+
+#ifndef IP_CHECKSUM_H
+#define IP_CHECKSUM_H
+
+/* Note: The contents of this file were borrowed from the LinuxBIOS source
+ *       code which may be obtained from http://www.linuxbios.org.
+ *       Specifically, this code was obtained from LinuxBIOS version 1.0.0.8.
+ */
+
+unsigned long compute_ip_checksum(void *addr, unsigned long length);
+
+#endif /* IP_CHECKSUM_H */
Index: lxbios/input_file.h
===================================================================
--- lxbios/input_file.h	(revision 0)
+++ lxbios/input_file.h	(revision 0)
@@ -0,0 +1,56 @@
+/*****************************************************************************\
+ * input_file.h
+ * $Id: input_file.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_INPUT_FILE_H
+#define LXBIOS_INPUT_FILE_H
+
+#include "common.h"
+
+typedef struct cmos_write_t cmos_write_t;
+
+/* This represents a pending CMOS write operation.  When changing multiple
+ * CMOS parameter values, we first represent the changes as a list of pending
+ * write operations.  This allows us to sanity check all write operations
+ * before any of them are performed.
+ */
+struct cmos_write_t
+ { unsigned bit;
+   unsigned length;
+   unsigned long long value;
+   cmos_write_t *next;
+ };
+
+cmos_write_t * process_input_file (FILE *f);
+void do_cmos_writes (cmos_write_t *list);
+
+extern const char assignment_regex[];
+
+#endif  /* LXBIOS_INPUT_FILE_H */
Index: lxbios/ChangeLog
===================================================================
--- lxbios/ChangeLog	(revision 0)
+++ lxbios/ChangeLog	(revision 0)
@@ -0,0 +1,132 @@
+Mon Jan 23 16:00:00 PST 2006  David S. Peterson (dsp@llnl.gov)
+
+	Version 2.0.1
+
+	* Postpone most sanity checking of CMOS layout information until right
+	  before a CMOS read or write operation is attempted.  This fixes a
+	  problem discovered by Stefan Reinauer in which lxbios was failing on
+	  Opteron due to the existence of a "user_data" parameter that is 256
+	  bits long.  In general, postponing the sanity checks will make
+	  lxbios more adaptable to changes in how LinuxBIOS stores CMOS
+	  parameters.
+
+	* Merge fix from Stefan Reinauer that makes hex dumps look a bit
+	  nicer.
+
+	* Merge fix from Stefan Reinauer that allows lxbios to access CMOS
+	  memory beyond the first 128 bytes.
+
+Fri Dec 16 14:30:00 PST 2005  David S. Peterson (dsp@llnl.gov)
+
+	Version 2.0.0
+
+	* Added the following options:
+
+	      -Y
+		  Write CMOS layout information to standard output.
+
+	      -b OUTPUT_FILE
+		  Write the contents of CMOS memory to a binary file.
+
+	      -B INPUT_FILE
+		  Read binary data from file and write it to CMOS memory.
+
+	      -x
+		  Show a hex dump of all CMOS data.
+
+	      -X DUMPFILE
+		  Read binary data from a CMOS dumpfile and show a hex dump of
+		  the data.
+
+	  Thanks to Stefan Reinauer for suggesting the ideas for the "-Y",
+	  "-b OUTPUT_FILE", and "-B INPUT_FILE" options.
+
+	* Added support for reading/writing CMOS parameters between 1 and 64
+	  bits in size that are not necessarily aligned on byte boundaries.
+
+	* Reworked much of the code, cleaning up some ugly parts.
+
+	* Made a number of minor improvements.
+
+Wed Nov 30 16:30:00 PST 2005  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.4.0
+
+	* Merge patch from Stefan Reinauer <stepan@openbios.org> that makes
+	  lxbios recognize the LB_TAG_OPTION_CHECKSUM entry placed in the
+	  LinuxBIOS table by newer versions of LinuxBIOS.
+
+	* Tweak formatting of code to facilitate merging future patches.
+
+	* Minor code cleanup.
+
+Fri Jun 25 18:30:00 PDT 2004  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.3.2.
+
+	* Changed default_is_printable_fn to avoid problems displaying hex
+	  dumps.
+
+Thu Jun 10 14:00:00 PDT 2004  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.3.1.
+
+	* Minor code cleanup.
+
+Fri Mar  7 18:00:00 PST 2003  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.3.0.
+
+	* Added -y option that tells lxbios to get CMOS layout information
+	  from a file instead of from the CMOS option table.
+
+	* Modified command syntax so that -r flag is required for reading a
+	  single CMOS parameter.
+
+	* Fixed bug where CMOS checksum was being displayed with bytes
+	  reversed.
+
+Thu Dec  5 14:30:00 PST 2002  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.2.3.
+
+	* Fixed bug where checksum was not being updated after changing CMOS
+	  parameter values.
+
+	* Added code to verify checksum when reading CMOS parameters.
+
+	* Modified program so that check_sum parameter is treated differently
+	  from other CMOS parameters.  Now, -c option must be used to
+	  read/write check_sum parameter.
+
+Thu Nov 14 15:15:00 PST 2002  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.2.2.
+
+	* Shortened output of usage message.
+
+Mon Nov 11 18:00:00 PST 2002  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.2.1.
+
+	* Fixed typo in man page.
+
+Mon Nov 11 10:00:00 PST 2002  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.2.0.
+
+	* Added hex dump stuff.
+
+Fri Nov  8 17:00:00 PST 2002  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.1.0.
+
+	* Added -l option for displaying entries from LinuxBIOS table.
+
+	* Added -d option for low-level dump of LinuxBIOS table.
+
+	* Improved code that searches for LinuxBIOS table.
+
+Wed Nov  6 09:30:00 PST 2002  David S. Peterson (dsp@llnl.gov)
+
+	Version 1.0.0.
Index: lxbios/lxbios.spec
===================================================================
--- lxbios/lxbios.spec	(revision 0)
+++ lxbios/lxbios.spec	(revision 0)
@@ -0,0 +1,50 @@
+##
+# $Id: lxbios.spec,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+##
+
+Name:    lxbios
+Version: 2.0.1
+Release: 0
+
+Summary: LinuxBIOS utility program
+Group:   System Environment/Base
+License: GPL
+Provides: lxbios
+
+BuildRoot: %{_tmppath}/%{name}-%{version}
+
+Source0: %{name}-%{version}.tgz
+
+%description
+lxbios is a utility for reading/writing LinuxBIOS parameters and displaying
+information from the LinuxBIOS table.
+
+At boot time, LinuxBIOS places a table (known as the LinuxBIOS table) in low
+physical memory.  The contents of this table are preserved even after
+LinuxBIOS transfers control to the kernel and the kernel initializes itself.
+The LinuxBIOS table contains various system information such as the type of
+mainboard in use.  It also specifies locations in the CMOS (nonvolatile RAM)
+where the LinuxBIOS parameters are stored.
+
+%prep
+%setup -n %{name}-%{version}
+
+%build
+make
+
+%install
+rm -rf "$RPM_BUILD_ROOT"
+mkdir -p "$RPM_BUILD_ROOT/usr/bin"
+mkdir -p "$RPM_BUILD_ROOT/usr/man/man1"
+cp lxbios "$RPM_BUILD_ROOT/usr/bin"
+cp lxbios.1.gz $RPM_BUILD_ROOT/usr/man/man1
+
+%clean
+rm -rf "$RPM_BUILD_ROOT"
+
+%files
+%defattr(-,root,root,0755)
+%doc ChangeLog README
+%doc README
+/usr/bin/lxbios
+/usr/man/man1/lxbios.1.gz
Index: lxbios/cmos_lowlevel.c
===================================================================
--- lxbios/cmos_lowlevel.c	(revision 0)
+++ lxbios/cmos_lowlevel.c	(revision 0)
@@ -0,0 +1,299 @@
+/*****************************************************************************\
+ * cmos_lowlevel.c
+ * $Id: cmos_lowlevel.c,v 1.3 2006/01/24 00:25:39 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include <sys/io.h>
+#include "common.h"
+#include "cmos_lowlevel.h"
+
+typedef struct
+ { unsigned byte_index;
+   unsigned bit_offset;
+ }
+cmos_bit_op_location_t;
+
+static unsigned cmos_bit_op_strategy (unsigned bit, unsigned bits_left,
+                                      cmos_bit_op_location_t *where);
+static unsigned char cmos_read_bits (const cmos_bit_op_location_t *where,
+                                     unsigned nr_bits);
+static void cmos_write_bits (const cmos_bit_op_location_t *where,
+                             unsigned nr_bits, unsigned char value);
+static unsigned char get_bits (unsigned long long value, unsigned bit,
+                               unsigned nr_bits);
+static void put_bits (unsigned char value, unsigned bit, unsigned nr_bits,
+                      unsigned long long *result);
+
+/****************************************************************************
+ * get_bits
+ *
+ * Extract a value 'nr_bits' bits wide starting at bit position 'bit' from
+ * 'value' and return the result.  It is assumed that 'nr_bits' is at most 8.
+ ****************************************************************************/
+static inline unsigned char get_bits (unsigned long long value, unsigned bit,
+                                      unsigned nr_bits)
+ { return (value >> bit) & ((unsigned char) ((1 << nr_bits) - 1)); }
+
+/****************************************************************************
+ * put_bits
+ *
+ * Extract the low order 'nr_bits' bits from 'value' and store them in the
+ * value pointed to by 'result' starting at bit position 'bit'.  The bit
+ * positions in 'result' where the result is stored are assumed to be
+ * initially zero.
+ ****************************************************************************/
+static inline void put_bits (unsigned char value, unsigned bit,
+                             unsigned nr_bits, unsigned long long *result)
+ { *result += (value & ((unsigned char) ((1 << nr_bits) - 1))) << bit; }
+
+/****************************************************************************
+ * cmos_read
+ *
+ * Read value from nonvolatile RAM at position given by 'bit' and 'length'
+ * and return this value.  The I/O privilege level of the currently executing
+ * process must be set appropriately.
+ ****************************************************************************/
+unsigned long long cmos_read (unsigned bit, unsigned length)
+ { cmos_bit_op_location_t where;
+   unsigned next_bit, bits_left, nr_bits;
+   unsigned long long result;
+   unsigned char value;
+
+   assert(!verify_cmos_op(bit, length));
+   result = 0;
+
+   for (next_bit = 0, bits_left = length;
+        bits_left;
+        next_bit += nr_bits, bits_left -= nr_bits)
+    { nr_bits = cmos_bit_op_strategy(bit + next_bit, bits_left, &where);
+      value = cmos_read_bits(&where, nr_bits);
+      put_bits(value, next_bit, nr_bits, &result);
+    }
+
+   return result;
+ }
+
+/****************************************************************************
+ * cmos_write
+ *
+ * Write 'data' to nonvolatile RAM at position given by 'bit' and 'length'.
+ * The I/O privilege level of the currently executing process must be set
+ * appropriately.
+ ****************************************************************************/
+void cmos_write (unsigned bit, unsigned length, unsigned long long value)
+ { cmos_bit_op_location_t where;
+   unsigned next_bit, bits_left, nr_bits;
+
+   assert(!verify_cmos_op(bit, length));
+
+   for (next_bit = 0, bits_left = length;
+        bits_left;
+        next_bit += nr_bits, bits_left -= nr_bits)
+    { nr_bits = cmos_bit_op_strategy(bit + next_bit, bits_left, &where);
+      cmos_write_bits(&where, nr_bits, get_bits(value, next_bit, nr_bits));
+    }
+ }
+
+/****************************************************************************
+ * cmos_read_byte
+ *
+ * Read a byte from nonvolatile RAM at a position given by 'index' and return
+ * the result.  An 'index' value of 0 represents the first byte of
+ * nonvolatile RAM.
+ *
+ * Note: the first 14 bytes of nonvolatile RAM provide an interface to the
+ *       real time clock.
+ ****************************************************************************/
+unsigned char cmos_read_byte (unsigned index)
+ { unsigned short port_0, port_1;
+
+   assert(!verify_cmos_byte_index(index));
+
+   if (index < 128)
+    { port_0 = 0x70;
+      port_1 = 0x71;
+    }
+   else
+    { port_0 = 0x72;
+      port_1 = 0x73;
+    }
+
+   outb(index, port_0);
+   return inb(port_1);
+ }
+
+/****************************************************************************
+ * cmos_write_byte
+ *
+ * Write 'value' to nonvolatile RAM at a position given by 'index'.  An
+ * 'index' of 0 represents the first byte of nonvolatile RAM.
+ *
+ * Note: the first 14 bytes of nonvolatile RAM provide an interface to the
+ *       real time clock.  Writing to any of these bytes will therefore
+ *       affect its functioning.
+ ****************************************************************************/
+void cmos_write_byte (unsigned index, unsigned char value)
+ { unsigned short port_0, port_1;
+
+   assert(!verify_cmos_byte_index(index));
+
+   if (index < 128)
+    { port_0 = 0x70;
+      port_1 = 0x71;
+    }
+   else
+    { port_0 = 0x72;
+      port_1 = 0x73;
+    }
+
+   outb(index, port_0);
+   outb(value, port_1);
+ }
+
+/****************************************************************************
+ * cmos_read_all
+ *
+ * Read all contents of CMOS memory into array 'data'.  The first 14 bytes of
+ * 'data' are set to zero since this corresponds to the real time clock area.
+ ****************************************************************************/
+void cmos_read_all (unsigned char data[])
+ { unsigned i;
+
+   for (i = 0; i < CMOS_RTC_AREA_SIZE; i++)
+      data[i] = 0;
+
+   for (; i < CMOS_SIZE; i++)
+      data[i] = cmos_read_byte(i);
+ }
+
+/****************************************************************************
+ * cmos_write_all
+ *
+ * Update all of CMOS memory with the contents of array 'data'.  The first 14
+ * bytes of 'data' are ignored since this corresponds to the real time clock
+ * area.
+ ****************************************************************************/
+void cmos_write_all (unsigned char data[])
+ { unsigned i;
+
+   for (i = CMOS_RTC_AREA_SIZE; i < CMOS_SIZE; i++)
+      cmos_write_byte(i, data[i]);
+ }
+
+/****************************************************************************
+ * set_iopl
+ *
+ * Set the I/O privilege level of the executing process.  Root privileges are
+ * required for performing this action.  A sufficient I/O privilege level
+ * allows the process to access x86 I/O address space and to disable/reenable
+ * interrupts while executing in user space.  Messing with the I/O privilege
+ * level is therefore somewhat dangerous.
+ ****************************************************************************/
+void set_iopl (int level)
+ { assert((level >= 0) && (level <= 3));
+
+   if (iopl(level))
+    { fprintf(stderr,
+              "%s: iopl() system call failed.  You must be root to do "
+              "this.\n",
+              prog_name);
+      exit(1);
+    }
+ }
+
+/****************************************************************************
+ * verify_cmos_op
+ *
+ * 'bit' represents a bit position in the nonvolatile RAM.  The first bit
+ * (i.e. the lowest order bit of the first byte) of nonvolatile RAM is
+ * labeled as bit 0.  'length' represents the width in bits of a value we
+ * wish to read or write.  Perform sanity checking on 'bit' and 'length'.  If
+ * no problems were encountered, return OK.  Else return an error code.
+ ****************************************************************************/
+int verify_cmos_op (unsigned bit, unsigned length)
+ { if ((bit >= (8 * CMOS_SIZE)) || ((bit + length) > (8 * CMOS_SIZE)))
+      return CMOS_AREA_OUT_OF_RANGE;
+
+   if (bit < (8 * CMOS_RTC_AREA_SIZE))
+      return CMOS_AREA_OVERLAPS_RTC;
+
+   if (length > (8 * sizeof(unsigned long long)))
+      return CMOS_AREA_TOO_WIDE;
+
+   return OK;
+ }
+
+/****************************************************************************
+ * cmos_bit_op_strategy
+ *
+ * Helper function used by cmos_read() and cmos_write() to determine which
+ * bits to read or write next.
+ ****************************************************************************/
+static unsigned cmos_bit_op_strategy (unsigned bit, unsigned bits_left,
+                                      cmos_bit_op_location_t *where)
+ { unsigned max_bits;
+
+   where->byte_index = bit >> 3;
+   where->bit_offset = bit & 0x07;
+   max_bits = 8 - where->bit_offset;
+   return (bits_left > max_bits) ? max_bits : bits_left;
+ }
+
+/****************************************************************************
+ * cmos_read_bits
+ *
+ * Read a chunk of bits from a byte location within CMOS memory.  Return the
+ * value represented by the chunk of bits.
+ ****************************************************************************/
+static unsigned char cmos_read_bits (const cmos_bit_op_location_t *where,
+                                     unsigned nr_bits)
+ { return (cmos_read_byte(where->byte_index) >> where->bit_offset) &
+          ((unsigned char) ((1 << nr_bits) - 1));
+ }
+
+/****************************************************************************
+ * cmos_write_bits
+ *
+ * Write a chunk of bits (the low order 'nr_bits' bits of 'value') to an area
+ * within a particular byte of CMOS memory.
+ ****************************************************************************/
+static void cmos_write_bits (const cmos_bit_op_location_t *where,
+                             unsigned nr_bits, unsigned char value)
+ { unsigned char n, mask;
+
+   if (nr_bits == 8)
+    { cmos_write_byte(where->byte_index, value);
+      return;
+    }
+
+   n = cmos_read_byte(where->byte_index);
+   mask = ((unsigned char) ((1 << nr_bits) - 1)) << where->bit_offset;
+   n = (n & ~mask) + ((value << where->bit_offset) & mask);
+   cmos_write_byte(where->byte_index, n);
+ }
Index: lxbios/reg_expr.c
===================================================================
--- lxbios/reg_expr.c	(revision 0)
+++ lxbios/reg_expr.c	(revision 0)
@@ -0,0 +1,81 @@
+/*****************************************************************************\
+ * reg_expr.c
+ * $Id: reg_expr.c,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include <stdarg.h>
+#include "common.h"
+#include "reg_expr.h"
+
+/****************************************************************************
+ * compile_reg_exprs
+ *
+ * Compile a bunch of regular expressions.
+ ****************************************************************************/
+void compile_reg_exprs (int cflags, int num_exprs,
+                        /* const char *expr1, regex_t *reg1, */ ...)
+ { static const size_t ERROR_BUF_SIZE = 256;
+   char error_msg[ERROR_BUF_SIZE];
+   va_list ap;
+   regex_t *reg;
+   const char *expr;
+   int i, result;
+
+   va_start(ap, num_exprs);
+
+   for (i = 0; i < num_exprs; i++)
+    { expr = va_arg(ap, const char *);
+      reg  = va_arg(ap, regex_t *);
+
+      if ((result = regcomp(reg, expr, cflags)) != 0)
+       { regerror(result, reg, error_msg, ERROR_BUF_SIZE);
+         fprintf(stderr, "%s: %s\n", prog_name, error_msg);
+         exit(1);
+       }
+    }
+
+   va_end(ap);
+ }
+
+/****************************************************************************
+ * free_reg_exprs
+ *
+ * Destroy a bunch of previously compiled regular expressions.
+ ****************************************************************************/
+void free_reg_exprs (int num_exprs, /* regex_t *reg1, */ ...)
+ { va_list ap;
+   int i;
+
+   va_start(ap, num_exprs);
+
+   for (i = 0; i < num_exprs; i++)
+      regfree(va_arg(ap, regex_t *));
+
+   va_end(ap);
+ }
Index: lxbios/linuxbios_tables.h
===================================================================
--- lxbios/linuxbios_tables.h	(revision 0)
+++ lxbios/linuxbios_tables.h	(revision 0)
@@ -0,0 +1,226 @@
+/*****************************************************************************\
+ * linuxbios_tables.h
+ * $Id: linuxbios_tables.h,v 1.1.1.1 2005/12/02 22:35:19 dsp_llnl Exp $
+\*****************************************************************************/
+
+#ifndef LINUXBIOS_TABLES_H
+#define LINUXBIOS_TABLES_H
+
+#include <stdint.h>
+
+/* Note: The contents of this file were borrowed from the LinuxBIOS source
+ *       code which may be obtained from http://www.linuxbios.org/.
+ *       Specifically, this code was obtained from LinuxBIOS version 1.1.8.
+ */
+
+/* The linuxbios table information is for conveying information
+ * from the firmware to the loaded OS image.  Primarily this
+ * is expected to be information that cannot be discovered by
+ * other means, such as quering the hardware directly.
+ *
+ * All of the information should be Position Independent Data.  
+ * That is it should be safe to relocated any of the information
+ * without it's meaning/correctnes changing.   For table that
+ * can reasonably be used on multiple architectures the data
+ * size should be fixed.  This should ease the transition between
+ * 32 bit and 64 bit architectures etc.
+ *
+ * The completeness test for the information in this table is:
+ * - Can all of the hardware be detected?
+ * - Are the per motherboard constants available?
+ * - Is there enough to allow a kernel to run that was written before
+ *   a particular motherboard is constructed? (Assuming the kernel
+ *   has drivers for all of the hardware but it does not have
+ *   assumptions on how the hardware is connected together).
+ *
+ * With this test it should be straight forward to determine if a
+ * table entry is required or not.  This should remove much of the
+ * long term compatibility burden as table entries which are
+ * irrelevant or have been replaced by better alternatives may be
+ * dropped.  Of course it is polite and expidite to include extra
+ * table entries and be backwards compatible, but it is not required.
+ */
+
+/* Since LinuxBIOS is usually compiled 32bit, gcc will align 64bit 
+ * types to 32bit boundaries. If the LinuxBIOS table is dumped on a 
+ * 64bit system, a uint64_t would be aligned to 64bit boundaries, 
+ * breaking the table format.
+ *
+ * lb_uint64 will keep 64bit LinuxBIOS table values aligned to 32bit
+ * to ensure compatibility. They can be accessed with the two functions
+ * below: unpack_lb64() and pack_lb64()
+ *
+ * See also: util/lbtdump/lbtdump.c
+ */
+
+struct lb_uint64 {
+	uint32_t lo;
+	uint32_t hi;
+};
+
+static inline uint64_t unpack_lb64(struct lb_uint64 value)
+{
+        uint64_t result;
+        result = value.hi;
+        result = (result << 32) + value.lo;
+        return result;
+}
+
+static inline struct lb_uint64 pack_lb64(uint64_t value)
+{
+        struct lb_uint64 result;
+        result.lo = (value >> 0) & 0xffffffff;
+        result.hi = (value >> 32) & 0xffffffff;
+        return result;
+}
+
+
+
+struct lb_header
+{
+        uint8_t  signature[4]; /* LBIO */
+        uint32_t header_bytes;
+        uint32_t header_checksum;
+        uint32_t table_bytes;
+        uint32_t table_checksum;
+        uint32_t table_entries;
+};
+
+/* Every entry in the boot enviroment list will correspond to a boot
+ * info record.  Encoding both type and size.  The type is obviously
+ * so you can tell what it is.  The size allows you to skip that
+ * boot enviroment record if you don't know what it easy.  This allows
+ * forward compatibility with records not yet defined.
+ */
+struct lb_record {
+        uint32_t tag;                /* tag ID */
+        uint32_t size;                /* size of record (in bytes) */
+};
+
+#define LB_TAG_UNUSED        0x0000
+
+#define LB_TAG_MEMORY        0x0001
+
+struct lb_memory_range {
+	struct lb_uint64 start;
+	struct lb_uint64 size;
+        uint32_t type;
+#define LB_MEM_RAM       1        /* Memory anyone can use */
+#define LB_MEM_RESERVED  2        /* Don't use this memory region */
+#define LB_MEM_TABLE     16        /* Ram configuration tables are kept in */
+};
+
+struct lb_memory {
+        uint32_t tag;
+        uint32_t size;
+        struct lb_memory_range map[0];
+};
+
+#define LB_TAG_HWRPB        0x0002
+struct lb_hwrpb {
+        uint32_t tag;
+        uint32_t size;
+        uint64_t hwrpb;
+};
+
+#define LB_TAG_MAINBOARD        0x0003
+struct lb_mainboard {
+        uint32_t tag;
+        uint32_t size;
+        uint8_t  vendor_idx;
+        uint8_t  part_number_idx;
+        uint8_t  strings[0];
+};
+
+#define LB_TAG_VERSION                0x0004
+#define LB_TAG_EXTRA_VERSION        0x0005
+#define LB_TAG_BUILD                0x0006
+#define LB_TAG_COMPILE_TIME        0x0007
+#define LB_TAG_COMPILE_BY        0x0008
+#define LB_TAG_COMPILE_HOST        0x0009
+#define LB_TAG_COMPILE_DOMAIN        0x000a
+#define LB_TAG_COMPILER                0x000b
+#define LB_TAG_LINKER                0x000c
+#define LB_TAG_ASSEMBLER        0x000d
+struct lb_string {
+        uint32_t tag;
+        uint32_t size;
+        uint8_t  string[0];
+};
+
+/* The following structures are for the cmos definitions table */
+#define LB_TAG_CMOS_OPTION_TABLE 200
+/* cmos header record */
+struct cmos_option_table {
+        uint32_t tag;               /* CMOS definitions table type */
+        uint32_t size;               /* size of the entire table */
+        uint32_t header_length;      /* length of header */
+};
+
+/* cmos entry record
+        This record is variable length.  The name field may be
+        shorter than CMOS_MAX_NAME_LENGTH. The entry may start
+        anywhere in the byte, but can not span bytes unless it
+        starts at the beginning of the byte and the length is
+        fills complete bytes.
+*/
+#define LB_TAG_OPTION 201
+struct cmos_entries {
+        uint32_t tag;                /* entry type */
+        uint32_t size;               /* length of this record */
+        uint32_t bit;                /* starting bit from start of image */
+        uint32_t length;             /* length of field in bits */
+        uint32_t config;             /* e=enumeration, h=hex, r=reserved */
+        uint32_t config_id;          /* a number linking to an enumeration record */
+#define CMOS_MAX_NAME_LENGTH 32
+        uint8_t name[CMOS_MAX_NAME_LENGTH]; /* name of entry in ascii, 
+                                               variable length int aligned */
+};
+
+
+/* cmos enumerations record
+        This record is variable length.  The text field may be
+        shorter than CMOS_MAX_TEXT_LENGTH.
+*/
+#define LB_TAG_OPTION_ENUM 202
+struct cmos_enums {
+        uint32_t tag;                     /* enumeration type */
+        uint32_t size;                      /* length of this record */
+        uint32_t config_id;          /* a number identifying the config id */
+        uint32_t value;              /* the value associated with the text */
+#define CMOS_MAX_TEXT_LENGTH 32
+        uint8_t text[CMOS_MAX_TEXT_LENGTH]; /* enum description in ascii, 
+                                                variable length int aligned */
+};
+
+/* cmos defaults record
+        This record contains default settings for the cmos ram.
+*/
+#define LB_TAG_OPTION_DEFAULTS 203
+struct cmos_defaults {
+        uint32_t tag;                /* default type */
+        uint32_t size;               /* length of this record */
+        uint32_t name_length;        /* length of the following name field */
+        uint8_t name[CMOS_MAX_NAME_LENGTH]; /* name identifying the default */
+#define CMOS_IMAGE_BUFFER_SIZE 128
+        uint8_t default_set[CMOS_IMAGE_BUFFER_SIZE]; /* default settings */
+};
+
+#define LB_TAG_OPTION_CHECKSUM 204
+struct	cmos_checksum {
+	uint32_t tag;
+	uint32_t size;
+	/* In practice everything is byte aligned, but things are measured
+	 * in bits to be consistent.
+	 */
+	uint32_t range_start;	/* First bit that is checksummed (byte aligned) */
+	uint32_t range_end;	/* Last bit that is checksummed (byte aligned) */
+	uint32_t location;	/* First bit of the checksum (byte aligned) */
+	uint32_t type;		/* Checksum algorithm that is used */
+#define CHECKSUM_NONE	0
+#define CHECKSUM_PCBIOS	1
+};
+
+
+
+#endif /* LINUXBIOS_TABLES_H */
Index: lxbios/README
===================================================================
--- lxbios/README	(revision 0)
+++ lxbios/README	(revision 0)
@@ -0,0 +1,21 @@
+$Id: README,v 1.3 2006/01/24 00:25:39 dsp_llnl Exp $
+
+Summary of Operation
+--------------------
+lxbios is a utility for reading/writing LinuxBIOS parameters and
+displaying information from the LinuxBIOS table.  It is intended for x86-based
+systems (both 32-bit and 64-bit) that use LinuxBIOS.
+
+The LinuxBIOS table resides in low physical memory, and may be accessed
+through the /dev/mem interface.  It is created at boot time by LinuxBIOS, and
+contains various system information such as the type of mainboard in use.  It
+specifies locations in the CMOS (nonvolatile RAM) where the LinuxBIOS
+parameters are stored.
+
+For information about LinuxBIOS, see http://www.linuxbios.org/.
+
+Ideas for Future Improvements
+-----------------------------
+1.  Move the core functionality of this program into a shared library.
+2.  Consider adding options for displaying other BIOS-provided information
+    such as the MP table, ACPI table, PCI IRQ routing table, etc.
Index: lxbios/layout_file.c
===================================================================
--- lxbios/layout_file.c	(revision 0)
+++ lxbios/layout_file.c	(revision 0)
@@ -0,0 +1,848 @@
+/*****************************************************************************\
+ * layout_file.c
+ * $Id: layout_file.c,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include "common.h"
+#include "layout_file.h"
+#include "layout.h"
+#include "cmos_lowlevel.h"
+#include "reg_expr.h"
+
+static void process_layout_file (FILE *f);
+static void skip_past_start (FILE *f);
+static int process_entry (FILE *f, int skip_add);
+static int process_enum (FILE *f, int skip_add);
+static void process_checksum_info (FILE *f);
+static void skip_remaining_lines (FILE *f);
+static void create_entry (cmos_entry_t *cmos_entry,
+                          const char start_bit_str[], const char length_str[],
+                          const char config_str[], const char config_id_str[],
+                          const char name_str[]);
+static void try_add_layout_file_entry (const cmos_entry_t *cmos_entry);
+static void create_enum (cmos_enum_t *cmos_enum, const char id_str[],
+                         const char value_str[], const char text_str[]);
+static void try_add_cmos_enum (const cmos_enum_t *cmos_enum);
+static void set_checksum_info (const char start_str[], const char end_str[],
+                               const char index_str[]);
+static char cmos_entry_char_value (cmos_entry_config_t config);
+static int get_layout_file_line (FILE *f, char line[], int line_buf_size);
+static unsigned string_to_unsigned (const char str[], const char str_name[]);
+static unsigned long string_to_unsigned_long (const char str[],
+                                              const char str_name[]);
+static unsigned long do_string_to_unsigned_long (const char str[],
+                                                 const char str_name[],
+                                                 const char blurb[]);
+
+/* matches either a blank line or a comment line */
+static const char blank_or_comment_regex[] =
+   /* a blank line */
+   "(^[[:space:]]+$)"
+
+   "|"  /* or ... */
+
+   /* a line consisting of: optional whitespace followed by */
+   "(^[[:space:]]*"
+   /* a '#' character and optionally, additional characters */
+   "#.*$)";
+
+static regex_t blank_or_comment_expr;
+
+/* matches the line in a CMOS layout file indicating the start of the
+ * "entries" section.
+ */
+static const char start_entries_regex[] =
+   /* optional whitespace */
+   "^[[:space:]]*"
+   /* followed by "entries" */
+   "entries"
+   /* followed by optional whitespace */
+   "[[:space:]]*$";
+
+static regex_t start_entries_expr;
+
+/* matches the line in a CMOS layout file indicating the start of the
+ * "enumerations" section
+ */
+static const char start_enums_regex[] =
+   /* optional whitespace */
+   "^[[:space:]]*"
+   /* followed by "enumerations" */
+   "enumerations"
+   /* followed by optional whitespace */
+   "[[:space:]]*$";
+
+static regex_t start_enums_expr;
+
+/* matches the line in a CMOS layout file indicating the start of the
+ * "checksums" section
+ */
+static const char start_checksums_regex[] =
+   /* optional whitespace */
+   "^[[:space:]]*"
+   /* followed by "checksums" */
+   "checksums"
+   /* followed by optional whitespace */
+   "[[:space:]]*$";
+
+static regex_t start_checksums_expr;
+
+/* matches a line in a CMOS layout file specifying a CMOS entry */
+static const char entries_line_regex[] =
+   /* optional whitespace */
+   "^[[:space:]]*"
+   /* followed by a chunk of nonwhitespace for start-bit field */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for length field */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for config field */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for config-ID field */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for name field */
+   "([^[:space:]]+)"
+   /* followed by optional whitespace */
+   "[[:space:]]*$";
+
+static regex_t entries_line_expr;
+
+/* matches a line in a CMOS layout file specifying a CMOS enumeration */
+static const char enums_line_regex[] =
+   /* optional whitespace */
+   "^[[:space:]]*"
+   /* followed by a chunk of nonwhitespace for ID field */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for value field */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for text field */
+   "([^[:space:]]+)"
+   /* followed by optional whitespace */
+   "[[:space:]]*$";
+
+static regex_t enums_line_expr;
+
+/* matches the line in a CMOS layout file specifying CMOS checksum
+ * information
+ */
+static const char checksum_line_regex[] =
+   /* optional whitespace */
+   "^[[:space:]]*"
+   /* followed by "checksum" */
+   "checksum"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for first bit of summed area */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for last bit of summed area */
+   "([^[:space:]]+)"
+   /* followed by one or more whitespace characters */
+   "[[:space:]]+"
+   /* followed by a chunk of nonwhitespace for checksum location bit */
+   "([^[:space:]]+)"
+   /* followed by optional whitespace */
+   "[[:space:]]*$";
+
+static regex_t checksum_line_expr;
+
+static const int LINE_BUF_SIZE = 256;
+
+static int line_num;
+
+static const char *layout_filename = NULL;
+
+/****************************************************************************
+ * set_layout_filename
+ *
+ * Set the name of the file we will obtain CMOS layout information from.
+ ****************************************************************************/
+void set_layout_filename (const char filename[])
+ { layout_filename = filename; }
+
+/****************************************************************************
+ * get_layout_from_file
+ *
+ * Read CMOS layout information from the user-specified CMOS layout file.
+ ****************************************************************************/
+void get_layout_from_file (void)
+ { FILE *f;
+
+   assert(layout_filename != NULL);
+
+   if ((f = fopen(layout_filename, "r")) == NULL)
+    { fprintf(stderr, "%s: Can not open CMOS layout file %s for reading: "
+              "%s\n", prog_name, layout_filename, strerror(errno));
+      exit(1);
+    }
+
+   process_layout_file(f);
+   fclose(f);
+ }
+
+/****************************************************************************
+ * write_cmos_layout
+ *
+ * Write CMOS layout information to file 'f'.  The output is written in the
+ * format that CMOS layout files adhere to.
+ ****************************************************************************/
+void write_cmos_layout (FILE *f)
+ { const cmos_entry_t *cmos_entry;
+   const cmos_enum_t *cmos_enum;
+   cmos_checksum_layout_t layout;
+
+   fprintf(f, "entries\n");
+
+   for (cmos_entry = first_cmos_entry();
+        cmos_entry != NULL;
+        cmos_entry = next_cmos_entry(cmos_entry))
+      fprintf(f, "%u %u %c %u %s\n", cmos_entry->bit, cmos_entry->length,
+              cmos_entry_char_value(cmos_entry->config),
+              cmos_entry->config_id, cmos_entry->name);
+
+   fprintf(f, "\nenumerations\n");
+
+   for (cmos_enum = first_cmos_enum();
+        cmos_enum != NULL;
+        cmos_enum = next_cmos_enum(cmos_enum))
+      fprintf(f, "%u %llu %s\n", cmos_enum->config_id, cmos_enum->value,
+              cmos_enum->text);
+
+   layout.summed_area_start = cmos_checksum_start;
+   layout.summed_area_end = cmos_checksum_end;
+   layout.checksum_at = cmos_checksum_index;
+   checksum_layout_to_bits(&layout);
+   fprintf(f, "\nchecksums\nchecksum %u %u %u\n", layout.summed_area_start,
+           layout.summed_area_end, layout.checksum_at);
+ }
+
+/****************************************************************************
+ * process_layout_file
+ *
+ * Read CMOS layout information from file 'f' and add it to our internal
+ * repository.
+ ****************************************************************************/
+static void process_layout_file (FILE *f)
+ { compile_reg_exprs(REG_EXTENDED | REG_NEWLINE, 7,
+                     blank_or_comment_regex, &blank_or_comment_expr,
+                     start_entries_regex, &start_entries_expr,
+                     entries_line_regex, &entries_line_expr,
+                     start_enums_regex, &start_enums_expr,
+                     enums_line_regex, &enums_line_expr,
+                     start_checksums_regex, &start_checksums_expr,
+                     checksum_line_regex, &checksum_line_expr);
+   line_num = 1;
+   skip_past_start(f);
+
+   /* Skip past all entries.  We will process these later when we make a
+    * second pass through the file.
+    */
+   while (!process_entry(f, 1));
+
+   /* Process all enums, adding them to our internal repository as we go. */
+
+   if (process_enum(f, 0))
+    { fprintf(stderr, "%s: Error: CMOS layout file contains no "
+              "enumerations.\n", prog_name);
+      exit(1);
+    }
+
+   while (!process_enum(f, 0));
+
+   /* Go back to start of file. */
+   line_num = 1;
+   fseek(f, 0, SEEK_SET);
+
+   skip_past_start(f);
+
+   /* Process all entries, adding them to the repository as we go.  We must
+    * add the entries after the enums, even though they appear in the layout
+    * file before the enums.  This is because the entries are sanity checked
+    * against the enums as they are added.
+    */
+
+   if (process_entry(f, 0))
+    { fprintf(stderr, "%s: Error: CMOS layout file contains no entries.\n",
+              prog_name);
+      exit(1);
+    }
+
+   while (!process_entry(f, 0));
+
+   /* Skip past all enums.  They have already been processed. */
+   while (!process_enum(f, 1));
+
+   /* Process CMOS checksum info. */
+   process_checksum_info(f);
+
+   /* See if there are any lines left to process.  If so, verify that they are
+    * all either blank lines or comments.
+    */
+   skip_remaining_lines(f);
+
+   free_reg_exprs(7, &blank_or_comment_expr, &start_entries_expr,
+                  &entries_line_expr, &start_enums_expr,
+                  &enums_line_expr, &start_checksums_expr,
+                  &checksum_line_expr);
+ }
+
+/****************************************************************************
+ * skip_past_start
+ *
+ * Skip past the line that marks the start of the "entries" section.
+ ****************************************************************************/
+static void skip_past_start (FILE *f)
+ { char line[LINE_BUF_SIZE];
+
+   for (; ; line_num++)
+    { if (get_layout_file_line(f, line, LINE_BUF_SIZE))
+       { fprintf(stderr,
+                 "%s: \"entries\" line not found in CMOS layout file.\n",
+                 prog_name);
+         exit(1);
+       }
+
+      if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
+         continue;
+
+      if (!regexec(&start_entries_expr, line, 0, NULL, 0))
+         break;
+
+      fprintf(stderr, "%s: Syntax error on line %d of CMOS layout file.  "
+              "\"entries\" line expected.\n", prog_name, line_num);
+      exit(1);
+    }
+
+   line_num++;
+ }
+
+/****************************************************************************
+ * process_entry
+ *
+ * Get an entry from "entries" section of file and add it to our repository
+ * of layout information.  Return 0 if an entry was found and processed.
+ * Return 1 if there are no more entries.
+ ****************************************************************************/
+static int process_entry (FILE *f, int skip_add)
+ { static const size_t N_MATCHES = 6;
+   char line[LINE_BUF_SIZE];
+   regmatch_t match[N_MATCHES];
+   cmos_entry_t cmos_entry;
+   int result;
+
+   result = 1;
+
+   for (; ; line_num++)
+    { if (get_layout_file_line(f, line, LINE_BUF_SIZE))
+       { fprintf(stderr,
+                 "%s: Unexpected end of CMOS layout file reached while "
+                 "reading \"entries\" section.\n", prog_name);
+         exit(1);
+       }
+
+      if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
+         continue;
+
+      if (regexec(&entries_line_expr, line, N_MATCHES, match, 0))
+       { if (regexec(&start_enums_expr, line, 0, NULL, 0))
+          { fprintf(stderr, "%s: Syntax error on line %d of CMOS layout "
+                    "file.\n", prog_name, line_num);
+            exit(1);
+          }
+
+         break;  /* start of enumerations reached: no more entries */
+       }
+
+      result = 0;  /* next layout entry found */
+
+      if (skip_add)
+         break;
+
+      line[match[1].rm_eo] = '\0';
+      line[match[2].rm_eo] = '\0';
+      line[match[3].rm_eo] = '\0';
+      line[match[4].rm_eo] = '\0';
+      line[match[5].rm_eo] = '\0';
+      create_entry(&cmos_entry, &line[match[1].rm_so], &line[match[2].rm_so],
+                   &line[match[3].rm_so], &line[match[4].rm_so],
+                   &line[match[5].rm_so]);
+      try_add_layout_file_entry(&cmos_entry);
+      break;
+    }
+
+   line_num++;
+   return result;
+ }
+
+/****************************************************************************
+ * process_enum
+ *
+ * Get an enuneration from "enumerations" section of file and add it to our
+ * repository of layout information.  Return 0 if an enumeration was found
+ * and processed.  Return 1 if there are no more enumerations.
+ ****************************************************************************/
+static int process_enum (FILE *f, int skip_add)
+ { static const size_t N_MATCHES = 4;
+   char line[LINE_BUF_SIZE];
+   regmatch_t match[N_MATCHES];
+   cmos_enum_t cmos_enum;
+   int result;
+
+   result = 1;
+
+   for (; ; line_num++)
+    { if (get_layout_file_line(f, line, LINE_BUF_SIZE))
+       { fprintf(stderr,
+                 "%s: Unexpected end of CMOS layout file reached while "
+                 "reading \"enumerations\" section.\n", prog_name);
+         exit(1);
+       }
+
+      if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
+         continue;
+
+      if (regexec(&enums_line_expr, line, N_MATCHES, match, 0))
+       { if (regexec(&start_checksums_expr, line, 0, NULL, 0))
+          { fprintf(stderr, "%s: Syntax error on line %d of CMOS layout "
+                    "file.\n", prog_name, line_num);
+            exit(1);
+          }
+
+         break;  /* start of checksums reached: no more enumerations */
+       }
+
+      result = 0;  /* next layout enumeration found */
+
+      if (skip_add)
+         break;
+
+      line[match[1].rm_eo] = '\0';
+      line[match[2].rm_eo] = '\0';
+      line[match[3].rm_eo] = '\0';
+      create_enum(&cmos_enum, &line[match[1].rm_so], &line[match[2].rm_so],
+                  &line[match[3].rm_so]);
+      try_add_cmos_enum(&cmos_enum);
+      break;
+    }
+
+   line_num++;
+   return result;
+ }
+
+/****************************************************************************
+ * process_checksum_info
+ *
+ * Get line conatining CMOS checksum information.
+ ****************************************************************************/
+static void process_checksum_info (FILE *f)
+ { static const size_t N_MATCHES = 4;
+   char line[LINE_BUF_SIZE];
+   regmatch_t match[N_MATCHES];
+
+   for (; ; line_num++)
+    { if (get_layout_file_line(f, line, LINE_BUF_SIZE))
+       { fprintf(stderr,
+                 "%s: Unexpected end of CMOS layout file reached while "
+                 "reading \"checksums\" section.\n", prog_name);
+         exit(1);
+       }
+
+      if (!regexec(&blank_or_comment_expr, line, 0, NULL, 0))
+         continue;
+
+      if (regexec(&checksum_line_expr, line, N_MATCHES, match, 0))
+       { fprintf(stderr, "%s: Syntax error on line %d of CMOS layout "
+                 "file.  \"checksum\" line expected.\n", prog_name,
+                 line_num);
+         exit(1);
+       }
+
+      /* checksum line found */
+      line[match[1].rm_eo] = '\0';
+      line[match[2].rm_eo] = '\0';
+      line[match[3].rm_eo] = '\0';
+      set_checksum_info(&line[match[1].rm_so], &line[match[2].rm_so],
+                        &line[match[3].rm_so]);
+      break;
+    }
+ }
+
+/****************************************************************************
+ * skip_remaining_lines
+ *
+ * Get any remaining lines of unprocessed input.  Complain if we find a line
+ * that contains anything other than comments and whitespace.
+ ****************************************************************************/
+static void skip_remaining_lines (FILE *f)
+ { char line[LINE_BUF_SIZE];
+
+   for (line_num++;
+        get_layout_file_line(f, line, LINE_BUF_SIZE) == OK;
+        line_num++)
+    { if (regexec(&blank_or_comment_expr, line, 0, NULL, 0))
+       { fprintf(stderr, "%s: Syntax error on line %d of CMOS layout file: "
+                 "Only comments and/or whitespace allowed after "
+                 "\"checksum\" line.\n", prog_name, line_num);
+         exit(1);
+       }
+    }
+ }
+
+/****************************************************************************
+ * create_entry
+ *
+ * Create a CMOS entry structure representing the given information.  Perform
+ * sanity checking on input parameters.
+ ****************************************************************************/
+static void create_entry (cmos_entry_t *cmos_entry,
+                          const char start_bit_str[], const char length_str[],
+                          const char config_str[], const char config_id_str[],
+                          const char name_str[])
+ { cmos_entry->bit = string_to_unsigned(start_bit_str, "start-bit");
+   cmos_entry->length = string_to_unsigned(length_str, "length");
+
+   if (config_str[1] != '\0')
+      goto bad_config_str;
+
+   switch (config_str[0])
+    { case 'e':
+         cmos_entry->config = CMOS_ENTRY_ENUM;
+         break;
+
+      case 'h':
+         cmos_entry->config = CMOS_ENTRY_HEX;
+         break;
+
+      case 'r':
+         cmos_entry->config = CMOS_ENTRY_RESERVED;
+         break;
+
+      default:
+         goto bad_config_str;
+    }
+
+   cmos_entry->config_id = string_to_unsigned(config_id_str, "config-ID");
+
+   if (strlen(name_str) >= CMOS_MAX_NAME_LENGTH)
+    { fprintf(stderr, "%s: Error on line %d of CMOS layout file: name too "
+              "long (max length is %d).\n", prog_name, line_num,
+              CMOS_MAX_NAME_LENGTH - 1);
+      exit(1);
+    }
+
+   strcpy(cmos_entry->name, name_str);
+   return;
+
+bad_config_str:
+   fprintf(stderr, "%s: Error on line %d of CMOS layout file: 'e', 'h', or "
+           "'r' expected for config value.\n", prog_name, line_num);
+   exit(1);
+ }
+
+/****************************************************************************
+ * try_add_layout_file_entry
+ *
+ * Attempt to add the given CMOS entry to our internal repository.  Exit with
+ * an error message on failure.
+ ****************************************************************************/
+static void try_add_layout_file_entry (const cmos_entry_t *cmos_entry)
+ { const cmos_entry_t *conflict;
+
+   switch (add_cmos_entry(cmos_entry, &conflict))
+    { case OK:
+         return;
+
+      case CMOS_AREA_OUT_OF_RANGE:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  Area "
+                 "covered by entry %s is out of range.\n", prog_name,
+                 line_num, cmos_entry->name);
+         break;
+
+      case CMOS_AREA_TOO_WIDE:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  Area "
+                 "covered by entry %s is too wide.\n", prog_name, line_num,
+                 cmos_entry->name);
+         break;
+
+      case LAYOUT_ENTRY_OVERLAP:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  Layouts "
+                 "overlap for entries %s and %s.\n", prog_name, line_num,
+                 cmos_entry->name, conflict->name);
+         break;
+
+      case LAYOUT_ENTRY_BAD_LENGTH:
+         /* Silently ignore entries with zero length.  Although this should
+          * never happen in practice, we should handle the case in a
+          * reasonable manner just to be safe.
+          */
+         return;
+
+      default:
+         BUG();
+    }
+
+   exit(1);
+ }
+
+/****************************************************************************
+ * create_enum
+ *
+ * Create a CMOS enumeration structure representing the given information.
+ * Perform sanity checking on input parameters.
+ ****************************************************************************/
+static void create_enum (cmos_enum_t *cmos_enum, const char id_str[],
+                         const char value_str[], const char text_str[])
+ { cmos_enum->config_id = string_to_unsigned(id_str, "ID");
+   cmos_enum->value = string_to_unsigned_long(value_str, "value");
+
+   if (strlen(text_str) >= CMOS_MAX_TEXT_LENGTH)
+    { fprintf(stderr, "%s: Error on line %d of CMOS layout file: text too "
+              "long (max length is %d).\n", prog_name, line_num,
+              CMOS_MAX_TEXT_LENGTH - 1);
+      exit(1);
+    }
+
+   strcpy(cmos_enum->text, text_str);
+ }
+
+/****************************************************************************
+ * try_add_cmos_enum
+ *
+ * Attempt to add the given CMOS enum to our internal repository.  Exit with
+ * an error message on failure.
+ ****************************************************************************/
+static void try_add_cmos_enum (const cmos_enum_t *cmos_enum)
+ { switch (add_cmos_enum(cmos_enum))
+    { case OK:
+         return;
+
+      case LAYOUT_DUPLICATE_ENUM:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file: "
+                 "Enumeration found with duplicate ID/value combination.\n",
+                 prog_name, line_num);
+         break;
+
+      default:
+         BUG();
+    }
+
+   exit(1);
+ }
+
+/****************************************************************************
+ * set_checksum_info
+ *
+ * Set CMOS checksum information according to input parameters and perform
+ * sanity checking on input parameters.
+ ****************************************************************************/
+static void set_checksum_info (const char start_str[], const char end_str[],
+                               const char index_str[])
+ { cmos_checksum_layout_t layout;
+
+   /* These are bit positions that we want to convert to byte positions. */
+   layout.summed_area_start =
+         string_to_unsigned(start_str, "CMOS checksummed area start");
+   layout.summed_area_end =
+         string_to_unsigned(end_str, "CMOS checksummed area end");
+   layout.checksum_at =
+         string_to_unsigned(index_str, "CMOS checksum location");
+
+   switch (checksum_layout_to_bytes(&layout))
+    { case OK:
+         break;
+
+      case LAYOUT_SUMMED_AREA_START_NOT_ALIGNED:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  CMOS "
+                 "checksummed area start is not byte-aligned.\n", prog_name,
+                 line_num);
+         goto fail;
+
+      case LAYOUT_SUMMED_AREA_END_NOT_ALIGNED:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  CMOS "
+                 "checksummed area end is not byte-aligned.\n", prog_name,
+                 line_num);
+         goto fail;
+
+      case LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  CMOS "
+                 "checksum location is not byte-aligned.\n", prog_name,
+                 line_num);
+         goto fail;
+
+      case LAYOUT_INVALID_SUMMED_AREA:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  CMOS "
+                 "checksummed area end must be greater than CMOS checksummed "
+                 "area start.\n", prog_name, line_num);
+         goto fail;
+
+      case LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  CMOS "
+                 "checksum overlaps checksummed area.\n", prog_name,
+                 line_num);
+         goto fail;
+
+      case LAYOUT_SUMMED_AREA_OUT_OF_RANGE:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  CMOS "
+                 "checksummed area out of range.\n", prog_name, line_num);
+         goto fail;
+
+      case LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file.  CMOS "
+                 "checksum location out of range.\n", prog_name, line_num);
+         goto fail;
+
+      default:
+         BUG();
+    }
+
+   cmos_checksum_start = layout.summed_area_start;
+   cmos_checksum_end = layout.summed_area_end;
+   cmos_checksum_index = layout.checksum_at;
+   return;
+
+fail:
+   exit(1);
+ }
+
+/****************************************************************************
+ * cmos_entry_char_value
+ *
+ * Return the character representation of 'config'.
+ ****************************************************************************/
+static char cmos_entry_char_value (cmos_entry_config_t config)
+ { switch (config)
+    { case CMOS_ENTRY_ENUM:
+         return 'e';
+
+      case CMOS_ENTRY_HEX:
+         return 'h';
+
+      case CMOS_ENTRY_RESERVED:
+         return 'r';
+
+      default:
+         BUG();
+    }
+
+   return 0;  /* not reached */
+ }
+
+/****************************************************************************
+ * get_layout_file_line
+ *
+ * Get a line of input from file 'f'.  Store result in 'line' which is an
+ * array of 'line_buf_size' bytes.  Return OK on success or an error code on
+ * failure.
+ ****************************************************************************/
+static int get_layout_file_line (FILE *f, char line[], int line_buf_size)
+ { switch (get_line_from_file(f, line, line_buf_size))
+    { case OK:
+         return OK;
+
+      case LINE_EOF:
+         return LINE_EOF;
+
+      case LINE_TOO_LONG:
+         fprintf(stderr, "%s: Error on line %d of CMOS layout file: Maximum "
+                 "line length exceeded.  Max is %d characters.\n", prog_name,
+                 line_num, line_buf_size - 2);
+         break;
+    }
+
+   exit(1);
+   return 1;  /* keep compiler happy */
+ }
+
+/****************************************************************************
+ * string_to_unsigned
+ *
+ * Convert the string 'str' to an unsigned and return the result.
+ ****************************************************************************/
+static unsigned string_to_unsigned (const char str[], const char str_name[])
+ { unsigned long n;
+   unsigned z;
+
+   n = do_string_to_unsigned_long(str, str_name, "");
+
+   if ((z = (unsigned) n) != n)
+    { /* This could happen on an architecture in which sizeof(unsigned) <
+       * sizeof(unsigned long).
+       */
+      fprintf(stderr, "%s: Error on line %d of CMOS layout file: %s value is "
+              "out of range.\n", prog_name, line_num, str_name);
+      exit(1);
+    }
+
+   return z;
+ }
+
+/****************************************************************************
+ * string_to_unsigned_long
+ *
+ * Convert the string 'str' to an unsigned long and return the result.
+ ****************************************************************************/
+static unsigned long string_to_unsigned_long (const char str[],
+                                              const char str_name[])
+ { return do_string_to_unsigned_long(str, str_name, " long"); }
+
+/****************************************************************************
+ * do_string_to_unsigned_long
+ *
+ * Convert the string 'str' to an unsigned long and return the result.  Exit
+ * with an appropriate error message on failure.
+ ****************************************************************************/
+static unsigned long do_string_to_unsigned_long (const char str[],
+                                                 const char str_name[],
+                                                 const char blurb[])
+ { unsigned long n;
+   char *p;
+
+   n = strtoul(str, &p, 0);
+
+   if (*p != '\0')
+    { fprintf(stderr, "%s: Error on line %d of CMOS layout file: %s is not a "
+              "valid unsigned%s integer.\n", prog_name,
+              line_num, str_name, blurb);
+      exit(1);
+    }
+
+   return n;
+ }
Index: lxbios/layout.c
===================================================================
--- lxbios/layout.c	(revision 0)
+++ lxbios/layout.c	(revision 0)
@@ -0,0 +1,513 @@
+/*****************************************************************************\
+ * layout.c
+ * $Id: layout.c,v 1.2 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include "common.h"
+#include "layout.h"
+#include "cmos_lowlevel.h"
+
+typedef struct cmos_entry_item_t cmos_entry_item_t;
+
+struct cmos_entry_item_t
+ { cmos_entry_t item;
+   cmos_entry_item_t *next;
+ };
+
+typedef struct cmos_enum_item_t cmos_enum_item_t;
+
+struct cmos_enum_item_t
+ { cmos_enum_t item;
+   cmos_enum_item_t *next;
+ };
+
+static void default_cmos_layout_get_fn (void);
+static int areas_overlap (unsigned area_0_start, unsigned area_0_length,
+                          unsigned area_1_start, unsigned area_1_length);
+static int entries_overlap (const cmos_entry_t *p, const cmos_entry_t *q);
+static const cmos_enum_item_t * find_first_cmos_enum_id (unsigned config_id);
+
+const char checksum_param_name[] = "check_sum";
+
+/* Newer versions of LinuxBIOS store the 3 pieces of information below in the
+ * LinuxBIOS table so we don't have to rely on hardcoded values.
+ */
+
+/* This is the offset from the start of CMOS of the first byte that the
+ * checksum is calculated over.
+ */
+#define CMOS_CHECKSUM_START 49
+
+/* This is the offset from the start of CMOS of the last byte that the
+ * checksum is calculated over.
+ */
+#define CMOS_CHECKSUM_END 125
+
+/* This is the offset from the start of CMOS where the LinuxBIOS checksum is
+ * stored.
+ */
+#define CMOS_CHECKSUM_INDEX 126
+
+/* index of first byte of checksummed area */
+unsigned cmos_checksum_start = CMOS_CHECKSUM_START;
+
+/* index of last byte of checksummed area */
+unsigned cmos_checksum_end = CMOS_CHECKSUM_END;
+
+/* index of first byte of CMOS checksum (a big-endian 16-bit value) */
+unsigned cmos_checksum_index = CMOS_CHECKSUM_INDEX;
+
+/* List is sorted in ascending order according to 'bit' field in
+ * cmos_entry_t.
+ */
+static cmos_entry_item_t *cmos_entry_list = NULL;
+
+/* List is sorted in ascending order: first by 'config_id' and then by
+ * 'value'.
+ */
+static cmos_enum_item_t *cmos_enum_list = NULL;
+
+static cmos_layout_get_fn_t cmos_layout_get_fn = default_cmos_layout_get_fn;
+
+/****************************************************************************
+ * entries_overlap
+ *
+ * Return 1 if cmos entries 'p' and 'q' overlap.  Else return 0.
+ ****************************************************************************/
+static inline int entries_overlap (const cmos_entry_t *p,
+                                   const cmos_entry_t *q)
+ { return areas_overlap(p->bit, p->length, q->bit, q->length); }
+
+/****************************************************************************
+ * cmos_entry_to_const_item
+ *
+ * Return a pointer to the cmos_entry_item_t that 'p' is embedded within.
+ ****************************************************************************/
+static inline const cmos_entry_item_t * cmos_entry_to_const_item
+      (const cmos_entry_t *p)
+ { static const cmos_entry_t *pos = &((cmos_entry_item_t *) 0)->item;
+   unsigned long offset, address;
+
+   offset = (unsigned long) pos;
+   address = ((unsigned long) p) - offset;
+   return (const cmos_entry_item_t *) address;
+ }
+
+/****************************************************************************
+ * cmos_enum_to_const_item
+ *
+ * Return a pointer to the cmos_enum_item_t that 'p' is embedded within.
+ ****************************************************************************/
+static inline const cmos_enum_item_t * cmos_enum_to_const_item
+      (const cmos_enum_t *p)
+ { static const cmos_enum_t *pos = &((cmos_enum_item_t *) 0)->item;
+   unsigned long offset, address;
+
+   offset = (unsigned long) pos;
+   address = ((unsigned long) p) - offset;
+   return (const cmos_enum_item_t *) address;
+ }
+
+/****************************************************************************
+ * register_cmos_layout_get_fn
+ *
+ * Set 'fn' as the function that will be called to retrieve CMOS layout
+ * information.
+ ****************************************************************************/
+void register_cmos_layout_get_fn (cmos_layout_get_fn_t fn)
+ { cmos_layout_get_fn = fn; }
+
+/****************************************************************************
+ * get_cmos_layout
+ *
+ * Retrieve CMOS layout information and store it in our internal repository.
+ ****************************************************************************/
+void get_cmos_layout (void)
+ { cmos_layout_get_fn(); }
+
+/****************************************************************************
+ * add_cmos_entry
+ *
+ * Attempt to add CMOS entry 'e' to our internal repository of layout
+ * information.  Return OK on success or an error code on failure.  If
+ * operation fails because 'e' overlaps an existing CMOS entry, '*conflict'
+ * will be set to point to the overlapping entry.
+ ****************************************************************************/
+int add_cmos_entry (const cmos_entry_t *e, const cmos_entry_t **conflict)
+ { cmos_entry_item_t *item, *prev, *new_entry;
+
+   *conflict = NULL;
+
+   if (e->length < 1)
+      return LAYOUT_ENTRY_BAD_LENGTH;
+
+   if ((new_entry = (cmos_entry_item_t *) malloc(sizeof(*new_entry))) == NULL)
+      out_of_memory();
+
+   new_entry->item = *e;
+
+   if (cmos_entry_list == NULL)
+    { new_entry->next = NULL;
+      cmos_entry_list = new_entry;
+      return OK;
+    }
+
+   /* Find place in list to insert new entry.  List is sorted in ascending
+    * order.
+    */
+   for (item = cmos_entry_list, prev = NULL;
+        (item != NULL) && (item->item.bit < e->bit);
+        prev = item, item = item->next);
+
+   if (prev == NULL)
+    { if (entries_overlap(e, &cmos_entry_list->item))
+       { *conflict = &cmos_entry_list->item;
+         goto fail;
+       }
+
+      new_entry->next = cmos_entry_list;
+      cmos_entry_list = new_entry;
+      return OK;
+    }
+
+   if (entries_overlap(&prev->item, e))
+    { *conflict = &prev->item;
+      goto fail;
+    }
+
+   if ((item != NULL) && entries_overlap(e, &item->item))
+    { *conflict = &item->item;
+      goto fail;
+    }
+
+   new_entry->next = item;
+   prev->next = new_entry;
+   return OK;
+
+fail:
+   free(new_entry);
+   return LAYOUT_ENTRY_OVERLAP;
+ }
+
+/****************************************************************************
+ * find_cmos_entry
+ *
+ * Search for a CMOS entry whose name is 'name'.  Return pointer to matching
+ * entry or NULL if entry not found.
+ ****************************************************************************/
+const cmos_entry_t * find_cmos_entry (const char name[])
+ { cmos_entry_item_t *item;
+
+   for (item = cmos_entry_list; item != NULL; item = item->next)
+    { if (!strcmp(item->item.name, name))
+         return &item->item;
+    }
+
+   return NULL;
+ }
+
+/****************************************************************************
+ * first_cmos_entry
+ *
+ * Return a pointer to the first CMOS entry in our list or NULL if list is
+ * empty.
+ ****************************************************************************/
+const cmos_entry_t * first_cmos_entry (void)
+ { return (cmos_entry_list == NULL) ? NULL : &cmos_entry_list->item; }
+
+/****************************************************************************
+ * next_cmos_entry
+ *
+ * Return a pointer to next entry in list after 'last' or NULL if no more
+ * entries.
+ ****************************************************************************/
+const cmos_entry_t * next_cmos_entry (const cmos_entry_t *last)
+ { const cmos_entry_item_t *last_item, *next_item;
+
+   last_item = cmos_entry_to_const_item(last);
+   next_item = last_item->next;
+   return (next_item == NULL) ? NULL : &next_item->item;
+ }
+
+/****************************************************************************
+ * add_cmos_enum
+ *
+ * Attempt to add CMOS enum 'e' to our internal repository of layout
+ * information.  Return OK on success or an error code on failure.
+ ****************************************************************************/
+int add_cmos_enum (const cmos_enum_t *e)
+ { cmos_enum_item_t *item, *prev, *new_enum;
+
+   if ((new_enum = (cmos_enum_item_t *) malloc(sizeof(*new_enum))) == NULL)
+      out_of_memory();
+
+   new_enum->item = *e;
+
+   if (cmos_enum_list == NULL)
+    { new_enum->next = NULL;
+      cmos_enum_list = new_enum;
+      return OK;
+    }
+
+   /* The list of enums is sorted in ascending order, first by 'config_id' and
+    * then by 'value'.  Look for the first enum whose 'config_id' field
+    * matches 'e'.
+    */
+   for (item = cmos_enum_list, prev = NULL;
+        (item != NULL) && (item->item.config_id < e->config_id);
+        prev = item, item = item->next);
+
+   if (item == NULL)
+    { new_enum->next = NULL;
+      prev->next = new_enum;
+      return OK;
+    }
+
+   if (item->item.config_id > e->config_id)
+    { new_enum->next = item;
+
+      if (prev == NULL)
+         cmos_enum_list = new_enum;
+      else
+         prev->next = new_enum;
+
+      return OK;
+    }
+
+   /* List already contains at least one enum whose 'config_id' matches 'e'.
+    * Now find proper place to insert 'e' based on 'value'.
+    */
+   while (item->item.value < e->value)
+    { prev = item;
+      item = item->next;
+
+      if ((item == NULL) || (item->item.config_id != e->config_id))
+       { new_enum->next = item;
+         prev->next = new_enum;
+         return OK;
+       }
+    }
+
+   if (item->item.value == e->value)
+    { free(new_enum);
+      return LAYOUT_DUPLICATE_ENUM;
+    }
+
+   new_enum->next = item;
+
+   if (prev == NULL)
+      cmos_enum_list = new_enum;
+   else
+      prev->next = new_enum;
+
+   return OK;
+ }
+
+/****************************************************************************
+ * find_cmos_enum
+ *
+ * Search for an enum that matches 'config_id' and 'value'.  If found, return
+ * a pointer to the mathcing enum.  Else return NULL.
+ ****************************************************************************/
+const cmos_enum_t * find_cmos_enum (unsigned config_id,
+                                    unsigned long long value)
+ { const cmos_enum_item_t *item;
+
+   if ((item = find_first_cmos_enum_id(config_id)) == NULL)
+      return NULL;
+
+   while (item->item.value < value)
+    { item = item->next;
+
+      if ((item == NULL) || (item->item.config_id != config_id))
+         return NULL;
+    }
+
+   return (item->item.value == value) ? &item->item : NULL;
+ }
+
+/****************************************************************************
+ * first_cmos_enum
+ *
+ * Return a pointer to the first CMOS enum in our list or NULL if list is
+ * empty.
+ ****************************************************************************/
+const cmos_enum_t * first_cmos_enum (void)
+ { return (cmos_enum_list == NULL) ? NULL : &cmos_enum_list->item; }
+
+/****************************************************************************
+ * next_cmos_enum
+ *
+ * Return a pointer to next enum in list after 'last' or NULL if no more
+ * enums.
+ ****************************************************************************/
+const cmos_enum_t * next_cmos_enum (const cmos_enum_t *last)
+ { const cmos_enum_item_t *last_item, *next_item;
+
+   last_item = cmos_enum_to_const_item(last);
+   next_item = last_item->next;
+   return (next_item == NULL) ? NULL : &next_item->item;
+ }
+
+/****************************************************************************
+ * first_cmos_enum_id
+ *
+ * Return a pointer to the first CMOS enum in our list that matches
+ * 'config_id' or NULL if there are no matching enums.
+ ****************************************************************************/
+const cmos_enum_t * first_cmos_enum_id (unsigned config_id)
+ { const cmos_enum_item_t *item;
+
+   item = find_first_cmos_enum_id(config_id);
+   return (item == NULL) ? NULL : &item->item;
+ }
+
+/****************************************************************************
+ * next_cmos_enum_id
+ *
+ * Return a pointer to next enum in list after 'last' that matches the
+ * 'config_id' field of 'last' or NULL if there are no more matching enums.
+ ****************************************************************************/
+const cmos_enum_t * next_cmos_enum_id (const cmos_enum_t *last)
+ { const cmos_enum_item_t *item;
+
+   item = cmos_enum_to_const_item(last)->next;
+   return ((item == NULL) || (item->item.config_id != last->config_id)) ?
+          NULL : &item->item;
+ }
+
+/****************************************************************************
+ * is_checksum_name
+ *
+ * Return 1 if 'name' matches the name of the parameter representing the CMOS
+ * checksum.  Else return 0.
+ ****************************************************************************/
+int is_checksum_name (const char name[])
+ { return !strcmp(name, checksum_param_name); }
+
+/****************************************************************************
+ * checksum_layout_to_bytes
+ *
+ * On entry, '*layout' contains checksum-related layout information expressed
+ * in bits.  Perform sanity checking on the information and convert it from
+ * bit positions to byte positions.  Return OK on success or an error code if
+ * a sanity check fails.
+ ****************************************************************************/
+int checksum_layout_to_bytes (cmos_checksum_layout_t *layout)
+ { unsigned start, end, index;
+
+   start = layout->summed_area_start;
+   end = layout->summed_area_end;
+   index = layout->checksum_at;
+
+   if (start % 8)
+      return LAYOUT_SUMMED_AREA_START_NOT_ALIGNED;
+
+   if ((end % 8) != 7)
+      return LAYOUT_SUMMED_AREA_END_NOT_ALIGNED;
+
+   if (index % 8)
+      return LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED;
+
+   if (end <= start)
+      return LAYOUT_INVALID_SUMMED_AREA;
+
+   /* Convert bit positions to byte positions. */
+   start /= 8;
+   end /= 8;  /* equivalent to "end = ((end - 7) / 8)" */
+   index /= 8;
+
+   if (verify_cmos_byte_index(start) || verify_cmos_byte_index(end))
+      return LAYOUT_SUMMED_AREA_OUT_OF_RANGE;
+
+   if (verify_cmos_byte_index(index))
+      return LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE;
+
+   /* checksum occupies 16 bits */
+   if (areas_overlap(start, end - start + 1, index, index + 1))
+      return LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA;
+
+   layout->summed_area_start = start;
+   layout->summed_area_end = end;
+   layout->checksum_at = index;
+   return OK;
+ }
+
+/****************************************************************************
+ * checksum_layout_to_bits
+ *
+ * On entry, '*layout' contains checksum-related layout information expressed
+ * in bytes.  Convert this information to bit positions.
+ ****************************************************************************/
+void checksum_layout_to_bits (cmos_checksum_layout_t *layout)
+ { layout->summed_area_start *= 8;
+   layout->summed_area_end = (layout->summed_area_end * 8) + 7;
+   layout->checksum_at *= 8;
+ }
+
+/****************************************************************************
+ * default_cmos_layout_get_fn
+ *
+ * If this function is ever called, it means that an appropriate callback for
+ * obtaining CMOS layout information was not set before attempting to
+ * retrieve layout information.
+ ****************************************************************************/
+static void default_cmos_layout_get_fn (void)
+ { BUG(); }
+
+/****************************************************************************
+ * areas_overlap
+ *
+ * Return 1 if the two given areas overlap.  Else return 0.
+ ****************************************************************************/
+static int areas_overlap (unsigned area_0_start, unsigned area_0_length,
+                          unsigned area_1_start, unsigned area_1_length)
+ { unsigned area_0_end, area_1_end;
+
+   area_0_end = area_0_start + area_0_length - 1;
+   area_1_end = area_1_start + area_1_length - 1;
+   return ((area_1_start <= area_0_end) && (area_0_start <= area_1_end));
+ }
+
+/****************************************************************************
+ * find_first_cmos_enum_id
+ *
+ * Return a pointer to the first item in our list of enums that matches
+ * 'config_id'.  Return NULL if there is no matching enum.
+ ****************************************************************************/
+static const cmos_enum_item_t * find_first_cmos_enum_id (unsigned config_id)
+ { cmos_enum_item_t *item;
+
+   for (item = cmos_enum_list;
+        (item != NULL) && (item->item.config_id < config_id);
+        item = item->next);
+
+   return ((item == NULL) || (item->item.config_id > config_id)) ?
+          NULL : item;
+ }
Index: lxbios/cmos_lowlevel.h
===================================================================
--- lxbios/cmos_lowlevel.h	(revision 0)
+++ lxbios/cmos_lowlevel.h	(revision 0)
@@ -0,0 +1,62 @@
+/*****************************************************************************\
+ * cmos_lowlevel.h
+ * $Id: cmos_lowlevel.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by David S. Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_CMOS_LOWLEVEL_H
+#define LXBIOS_CMOS_LOWLEVEL_H
+
+#include "common.h"
+
+#define CMOS_AREA_OUT_OF_RANGE (CMOS_RESULT_START + 0)
+#define CMOS_AREA_OVERLAPS_RTC (CMOS_RESULT_START + 1)
+#define CMOS_AREA_TOO_WIDE (CMOS_RESULT_START + 2)
+
+unsigned long long cmos_read (unsigned bit, unsigned length);
+void cmos_write (unsigned bit, unsigned length, unsigned long long value);
+unsigned char cmos_read_byte (unsigned index);
+void cmos_write_byte (unsigned index, unsigned char value);
+void cmos_read_all (unsigned char data[]);
+void cmos_write_all (unsigned char data[]);
+void set_iopl (int level);
+int verify_cmos_op (unsigned bit, unsigned length);
+
+#define CMOS_SIZE 256  /* size of CMOS memory in bytes */
+#define CMOS_RTC_AREA_SIZE 14  /* first 14 bytes control real time clock */
+
+/****************************************************************************
+ * verify_cmos_byte_index
+ *
+ * Return 1 if 'index' does NOT specify a valid CMOS memory location.  Else
+ * return 0.
+ ****************************************************************************/
+static inline int verify_cmos_byte_index (unsigned index)
+ { return (index < CMOS_RTC_AREA_SIZE) || (index >= CMOS_SIZE); }
+
+#endif  /* LXBIOS_CMOS_LOWLEVEL_H */
Index: lxbios/reg_expr.h
===================================================================
--- lxbios/reg_expr.h	(revision 0)
+++ lxbios/reg_expr.h	(revision 0)
@@ -0,0 +1,42 @@
+/*****************************************************************************\
+ * reg_expr.h
+ * $Id: reg_expr.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_REG_EXPR_H
+#define LXBIOS_REG_EXPR_H
+
+#include <regex.h>
+#include "common.h"
+
+void compile_reg_exprs (int cflags, int num_exprs,
+                        /* const char *expr1, regex_t *reg1, */ ...);
+void free_reg_exprs (int num_exprs, /* regex_t *reg1, */ ...);
+
+#endif  /* LXBIOS_REG_EXPR_H */
Index: lxbios/layout_file.h
===================================================================
--- lxbios/layout_file.h	(revision 0)
+++ lxbios/layout_file.h	(revision 0)
@@ -0,0 +1,42 @@
+/*****************************************************************************\
+ * layout_file.h
+ * $Id: layout_file.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_LAYOUT_FILE_H
+#define LXBIOS_LAYOUT_FILE_H
+
+#include "common.h"
+#include "linuxbios_tables.h"
+
+void set_layout_filename (const char filename[]);
+void get_layout_from_file (void);
+void write_cmos_layout (FILE *f);
+
+#endif  /* LXBIOS_LAYOUT_FILE_H */
Index: lxbios/layout.h
===================================================================
--- lxbios/layout.h	(revision 0)
+++ lxbios/layout.h	(revision 0)
@@ -0,0 +1,114 @@
+/*****************************************************************************\
+ * layout.h
+ * $Id: layout.h,v 1.2 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_LAYOUT_H
+#define LXBIOS_LAYOUT_H
+
+#include "common.h"
+#include "linuxbios_tables.h"
+
+#define LAYOUT_ENTRY_OVERLAP (LAYOUT_RESULT_START + 0)
+#define LAYOUT_ENTRY_BAD_LENGTH (LAYOUT_RESULT_START + 1)
+#define LAYOUT_DUPLICATE_ENUM (LAYOUT_RESULT_START + 2)
+#define LAYOUT_SUMMED_AREA_START_NOT_ALIGNED (LAYOUT_RESULT_START + 3)
+#define LAYOUT_SUMMED_AREA_END_NOT_ALIGNED (LAYOUT_RESULT_START + 4)
+#define LAYOUT_CHECKSUM_LOCATION_NOT_ALIGNED (LAYOUT_RESULT_START + 5)
+#define LAYOUT_INVALID_SUMMED_AREA (LAYOUT_RESULT_START + 6)
+#define LAYOUT_CHECKSUM_OVERLAPS_SUMMED_AREA (LAYOUT_RESULT_START + 7)
+#define LAYOUT_SUMMED_AREA_OUT_OF_RANGE (LAYOUT_RESULT_START + 8)
+#define LAYOUT_CHECKSUM_LOCATION_OUT_OF_RANGE (LAYOUT_RESULT_START + 9)
+
+typedef enum
+ { CMOS_ENTRY_ENUM,
+   CMOS_ENTRY_HEX,
+   CMOS_ENTRY_RESERVED
+ }
+cmos_entry_config_t;
+
+/* This represents a CMOS parameter. */
+typedef struct
+ { unsigned bit;
+   unsigned length;
+   cmos_entry_config_t config;
+   unsigned config_id;
+   char name[CMOS_MAX_NAME_LENGTH];
+ }
+cmos_entry_t;
+
+/* This represents a possible value for a CMOS parameter of type
+ * CMOS_ENTRY_ENUM.
+ */
+typedef struct
+ { unsigned config_id;
+   unsigned long long value;
+   char text[CMOS_MAX_TEXT_LENGTH];
+ }
+cmos_enum_t;
+
+/* This represents the location of the CMOS checksum and the area over which
+ * it is computed.  Depending on the context, the values may be represented as
+ * either bit positions or byte positions.
+ */
+typedef struct
+ { unsigned summed_area_start;  /* first checksummed location */
+   unsigned summed_area_end;  /* last checksummed location */
+   unsigned checksum_at;  /* location of checksum */
+ }
+cmos_checksum_layout_t;
+
+extern const char checksum_param_name[];
+
+extern unsigned cmos_checksum_start;
+
+extern unsigned cmos_checksum_end;
+
+extern unsigned cmos_checksum_index;
+
+typedef void (*cmos_layout_get_fn_t) (void);
+
+void register_cmos_layout_get_fn (cmos_layout_get_fn_t fn);
+void get_cmos_layout (void);
+int add_cmos_entry (const cmos_entry_t *e, const cmos_entry_t **conflict);
+const cmos_entry_t * find_cmos_entry (const char name[]);
+const cmos_entry_t * first_cmos_entry (void);
+const cmos_entry_t * next_cmos_entry (const cmos_entry_t *last);
+int add_cmos_enum (const cmos_enum_t *e);
+const cmos_enum_t * find_cmos_enum (unsigned config_id,
+                                    unsigned long long value);
+const cmos_enum_t * first_cmos_enum (void);
+const cmos_enum_t * next_cmos_enum (const cmos_enum_t *last);
+const cmos_enum_t * first_cmos_enum_id (unsigned config_id);
+const cmos_enum_t * next_cmos_enum_id (const cmos_enum_t *last);
+int is_checksum_name (const char name[]);
+int checksum_layout_to_bytes (cmos_checksum_layout_t *layout);
+void checksum_layout_to_bits (cmos_checksum_layout_t *layout);
+
+#endif  /* LXBIOS_LAYOUT_H */
Index: lxbios/opts.c
===================================================================
--- lxbios/opts.c	(revision 0)
+++ lxbios/opts.c	(revision 0)
@@ -0,0 +1,232 @@
+/*****************************************************************************\
+ * opts.c
+ * $Id: opts.c,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include "common.h"
+#include "opts.h"
+
+lxbios_op_info_t lxbios_op;
+
+lxbios_op_modifier_info_t lxbios_op_modifiers[LXBIOS_NUM_OP_MODIFIERS];
+
+static char * handle_optional_arg (int argc, char *argv[]);
+static void register_op (int *op_found, lxbios_op_t op, char op_param[]);
+static void register_op_modifier (lxbios_op_modifier_t mod, char mod_param[]);
+static void resolve_op_modifiers (void);
+static void sanity_check_args (void);
+
+static const char getopt_string[] = "-ab:B:c::de:hil::np:r:tvw:xX:y:Y";
+
+/****************************************************************************
+ * parse_lxbios_args
+ *
+ * Parse command line arguments.
+ ****************************************************************************/
+void parse_lxbios_args (int argc, char *argv[])
+ { lxbios_op_modifier_info_t *mod_info;
+   int i, op_found;
+   char c;
+
+   for (i = 0, mod_info = lxbios_op_modifiers;
+        i < LXBIOS_NUM_OP_MODIFIERS;
+        i++, mod_info++)
+    { mod_info->found = FALSE;
+      mod_info->found_seq = 0;
+      mod_info->param = NULL;
+    }
+
+   op_found = FALSE;
+   opterr = 0;
+
+   do
+    { switch (c = getopt(argc, argv, getopt_string))
+       { case 'a':
+            register_op(&op_found, LXBIOS_OP_CMOS_SHOW_ALL_PARAMS, NULL);
+            break;
+         case 'b':
+            register_op(&op_found, LXBIOS_OP_WRITE_CMOS_DUMP, optarg);
+            break;
+         case 'B':
+            register_op(&op_found, LXBIOS_OP_READ_CMOS_DUMP, optarg);
+            break;
+         case 'c':
+            register_op(&op_found, LXBIOS_OP_CMOS_CHECKSUM,
+                        handle_optional_arg(argc, argv));
+            break;
+         case 'd':
+            register_op(&op_found, LXBIOS_OP_LBTABLE_DUMP, NULL);
+            break;
+         case 'e':
+            register_op(&op_found, LXBIOS_OP_SHOW_PARAM_VALUES, optarg);
+            break;
+         case 'h':
+            register_op(&op_found, LXBIOS_OP_SHOW_USAGE, NULL);
+            break;
+         case 'i':
+            register_op(&op_found, LXBIOS_OP_CMOS_SET_PARAMS_STDIN, NULL);
+            break;
+         case 'l':
+            register_op(&op_found, LXBIOS_OP_LBTABLE_SHOW_INFO,
+                        handle_optional_arg(argc, argv));
+            break;
+         case 'n':
+            register_op_modifier(LXBIOS_MOD_SHOW_VALUE_ONLY, NULL);
+            break;
+         case 'p':
+            register_op(&op_found, LXBIOS_OP_CMOS_SET_PARAMS_FILE, optarg);
+            break;
+         case 'r':
+            register_op(&op_found, LXBIOS_OP_CMOS_SHOW_ONE_PARAM, optarg);
+            break;
+         case 't':
+            register_op_modifier(LXBIOS_MOD_USE_CMOS_OPT_TABLE, NULL);
+            break;
+         case 'v':
+            register_op(&op_found, LXBIOS_OP_SHOW_VERSION, NULL);
+            break;
+         case 'w':
+            register_op(&op_found, LXBIOS_OP_CMOS_SET_ONE_PARAM, optarg);
+            break;
+         case 'x':
+            register_op(&op_found, LXBIOS_OP_SHOW_CMOS_HEX_DUMP, NULL);
+            break;
+         case 'X':
+            register_op(&op_found, LXBIOS_OP_SHOW_CMOS_DUMPFILE, optarg);
+            break;
+         case 'y':
+            register_op_modifier(LXBIOS_MOD_USE_CMOS_LAYOUT_FILE, optarg);
+            break;
+         case 'Y':
+            register_op(&op_found, LXBIOS_OP_SHOW_LAYOUT, NULL);
+            break;
+         case -1:  /* no more command line args */
+            break;
+         case '?':  /* unknown option found */
+         case 1:  /* nonoption command line arg found */
+         default:
+            usage(stderr);
+            break;
+       }
+    }
+   while (c != -1);
+
+   if (!op_found)
+      usage(stderr);
+
+   resolve_op_modifiers();
+   sanity_check_args();
+ }
+
+/****************************************************************************
+ * handle_optional_arg
+ *
+ * Handle a command line option with an optional argument.
+ ****************************************************************************/
+static char * handle_optional_arg (int argc, char *argv[])
+ { char *arg;
+
+   if (optarg != NULL)
+    { /* optional arg is present and arg was specified as "-zarg" (with no
+       * whitespace between "z" and "arg"), where -z is the option and "arg"
+       * is the value of the optional arg
+       */
+      return optarg;
+    }
+
+   if ((argv[optind] == NULL) || (argv[optind][0] == '-'))
+      return NULL;
+
+   arg = argv[optind];  /* optional arg is present */
+
+   /* This call to getopt yields the optional arg we just found, which we want
+    * to skip.
+    */
+   getopt(argc, argv, getopt_string);
+
+   return arg;
+ }
+
+/****************************************************************************
+ * register_op
+ *
+ * Store the user's selection of which operation this program should perform.
+ ****************************************************************************/
+static void register_op (int *op_found, lxbios_op_t op, char op_param[])
+ { if (*op_found && (op != lxbios_op.op))
+      usage(stderr);
+
+   *op_found = TRUE;
+   lxbios_op.op = op;
+   lxbios_op.param = op_param;
+ }
+
+/****************************************************************************
+ * register_op_modifier
+ *
+ * Store information regarding an optional argument specified in addition to
+ * the user's selection of which operation this program should perform.
+ ****************************************************************************/
+static void register_op_modifier (lxbios_op_modifier_t mod, char mod_param[])
+ { static int found_seq = 0;
+   lxbios_op_modifier_info_t *mod_info;
+
+   mod_info = &lxbios_op_modifiers[mod];
+   mod_info->found = TRUE;
+   mod_info->found_seq = ++found_seq;
+   mod_info->param = mod_param;
+ }
+
+/****************************************************************************
+ * resolve_op_modifiers
+ *
+ * If the user specifies multiple arguments that conflict with each other,
+ * the last specified argument overrides previous conflicting arguments.
+ ****************************************************************************/
+static void resolve_op_modifiers (void)
+ { if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found &&
+       lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found)
+    { if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found_seq >
+          lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found_seq)
+         lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found = FALSE;
+      else
+         lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found = FALSE;
+    }
+ }
+
+/****************************************************************************
+ * sanity_check_args
+ *
+ * Perform sanity checking on command line arguments.
+ ****************************************************************************/
+static void sanity_check_args (void)
+ { if ((lxbios_op_modifiers[LXBIOS_MOD_SHOW_VALUE_ONLY].found) &&
+       (lxbios_op.op != LXBIOS_OP_CMOS_SHOW_ONE_PARAM))
+      usage(stderr);
+ }
Index: lxbios/compute_ip_checksum.c
===================================================================
--- lxbios/compute_ip_checksum.c	(revision 0)
+++ lxbios/compute_ip_checksum.c	(revision 0)
@@ -0,0 +1,44 @@
+/*****************************************************************************\
+ * compute_ip_checksum.c
+ * $Id: compute_ip_checksum.c,v 1.1.1.1 2005/12/02 22:35:19 dsp_llnl Exp $
+\*****************************************************************************/
+
+#include <stdint.h>
+#include "ip_checksum.h"
+
+/* Note: The contents of this file were borrowed from the LinuxBIOS source
+ *       code which may be obtained from http://www.linuxbios.org.
+ *       Specifically, this code was obtained from LinuxBIOS version 1.0.0.8.
+ */
+
+unsigned long compute_ip_checksum(void *addr, unsigned long length)
+{
+        uint8_t *ptr;
+        volatile union {
+                uint8_t  byte[2];
+                uint16_t word;
+        } value;
+        unsigned long sum;
+        unsigned long i;
+        /* In the most straight forward way possible,
+         * compute an ip style checksum.
+         */
+        sum = 0;
+        ptr = addr;
+        for(i = 0; i < length; i++) {
+                unsigned long value;
+                value = ptr[i];
+                if (i & 1) {
+                        value <<= 8;
+                }
+                /* Add the new value */
+                sum += value;
+                /* Wrap around the carry */
+                if (sum > 0xFFFF) {
+                        sum = (sum + (sum >> 16)) & 0xFFFF;
+                }
+        }
+        value.byte[0] = sum & 0xff;
+        value.byte[1] = (sum >> 8) & 0xff;
+        return (~value.word) & 0xFFFF;
+}
Index: lxbios/common.c
===================================================================
--- lxbios/common.c	(revision 0)
+++ lxbios/common.c	(revision 0)
@@ -0,0 +1,106 @@
+/*****************************************************************************\
+ * common.c
+ * $Id: common.c,v 1.3 2006/01/24 00:25:40 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#include "common.h"
+
+/* basename of this program, as reported by argv[0] */
+const char prog_name[] = "lxbios";
+
+/* version of this program */
+const char prog_version[] = "2.0.1";
+
+/****************************************************************************
+ * get_line_from_file
+ *
+ * Get a line of input from file 'f'.  Store result in 'line' which is an
+ * array of 'line_buf_size' bytes.
+ ****************************************************************************/
+int get_line_from_file (FILE *f, char line[], int line_buf_size)
+ { if (fgets(line, line_buf_size, f) == NULL)
+      return LINE_EOF;
+
+   /* If the file contains a line that is too long, then it's best to let the
+    * user know right away rather than passing back a truncated result that
+    * will lead to problems later on.
+    */
+   return (strlen(line) == ((size_t) (line_buf_size - 1))) ?
+          LINE_TOO_LONG : OK;
+ }
+
+/****************************************************************************
+ * out_of_memory
+ *
+ * We ran out of memory.  Print an error message and die.
+ ****************************************************************************/
+void out_of_memory (void)
+ { fprintf(stderr, "%s: Out of memory.\n", prog_name);
+   exit(1);
+ }
+
+/****************************************************************************
+ * usage
+ *
+ * Write a usage message to 'outfile'.  If 'outfile' is 'stderr' then exit
+ * with a value of 1.  Otherwise exit with a value of 0.
+ ****************************************************************************/
+void usage (FILE *outfile)
+ { fprintf(outfile,
+           "Usage: %s [-y LAYOUT_FILE | -t] PARAMETER ...\n\n"
+           "       Read/write LinuxBIOS parameters or show info from "
+           "LinuxBIOS table.\n\n"
+           "       -y LAYOUT_FILE: Use CMOS layout specified by "
+           "LAYOUT_FILE.\n"
+           "       -t:             Use CMOS layout specified by CMOS option "
+           "table.\n"
+           "       [-n] -r NAME:   Show parameter NAME.  If -n is given, "
+           "show value only.\n"
+           "       -e NAME:        Show all possible values for parameter "
+           "NAME.\n"
+           "       -a:             Show names and values for all "
+           "parameters.\n"
+           "       -w NAME=VALUE:  Set parameter NAME to VALUE.\n"
+           "       -p INPUT_FILE:  Set parameters according to INPUT_FILE.\n"
+           "       -i:             Same as -p but file contents taken from "
+           "standard input.\n"
+           "       -c [VALUE]:     Show CMOS checksum or set checksum to "
+           "VALUE.\n"
+           "       -l [ARG]:       Show LinuxBIOS table info for ARG, or "
+           "all ARG choices.\n"
+           "       -d:             Show low-level dump of LinuxBIOS table.\n"
+           "       -Y:             Show CMOS layout info.\n"
+           "       -b OUTPUT_FILE: Dump CMOS memory contents to file.\n"
+           "       -B INPUT_FILE:  Write file contents to CMOS memory.\n"
+           "       -x:             Show hex dump of CMOS memory.\n"
+           "       -X DUMPFILE:    Show hex dump of CMOS dumpfile.\n"
+           "       -v:             Show version info for this program.\n"
+           "       -h:             Show this message.\n", prog_name);
+   exit(outfile == stderr);
+ }
Index: lxbios/opts.h
===================================================================
--- lxbios/opts.h	(revision 0)
+++ lxbios/opts.h	(revision 0)
@@ -0,0 +1,84 @@
+/*****************************************************************************\
+ * opts.h
+ * $Id: opts.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_OPTS_H
+#define LXBIOS_OPTS_H
+
+#include "common.h"
+
+typedef enum
+ { LXBIOS_OP_SHOW_VERSION = 0,
+   LXBIOS_OP_SHOW_USAGE,
+   LXBIOS_OP_LBTABLE_SHOW_INFO,
+   LXBIOS_OP_LBTABLE_DUMP,
+   LXBIOS_OP_SHOW_PARAM_VALUES,
+   LXBIOS_OP_CMOS_SHOW_ONE_PARAM,
+   LXBIOS_OP_CMOS_SHOW_ALL_PARAMS,
+   LXBIOS_OP_CMOS_SET_ONE_PARAM,
+   LXBIOS_OP_CMOS_SET_PARAMS_STDIN,
+   LXBIOS_OP_CMOS_SET_PARAMS_FILE,
+   LXBIOS_OP_CMOS_CHECKSUM,
+   LXBIOS_OP_SHOW_LAYOUT,
+   LXBIOS_OP_WRITE_CMOS_DUMP,
+   LXBIOS_OP_READ_CMOS_DUMP,
+   LXBIOS_OP_SHOW_CMOS_HEX_DUMP,
+   LXBIOS_OP_SHOW_CMOS_DUMPFILE
+ }
+lxbios_op_t;
+
+typedef struct
+ { lxbios_op_t op;
+   char *param;
+ }
+lxbios_op_info_t;
+
+typedef enum
+ { LXBIOS_MOD_SHOW_VALUE_ONLY = 0,
+   LXBIOS_MOD_USE_CMOS_LAYOUT_FILE,
+   LXBIOS_MOD_USE_CMOS_OPT_TABLE,
+   LXBIOS_NUM_OP_MODIFIERS  /* must always be last */
+ }
+lxbios_op_modifier_t;
+
+typedef struct
+ { int found;
+   int found_seq;
+   char *param;
+ }
+lxbios_op_modifier_info_t;
+
+extern lxbios_op_info_t lxbios_op;
+
+extern lxbios_op_modifier_info_t lxbios_op_modifiers[];
+
+void parse_lxbios_args (int argc, char *argv[]);
+
+#endif  /* LXBIOS_OPTS_H */
Index: lxbios/DISCLAIMER
===================================================================
--- lxbios/DISCLAIMER	(revision 0)
+++ lxbios/DISCLAIMER	(revision 0)
@@ -0,0 +1,70 @@
+####################################################################
+# $Id: DISCLAIMER,v 1.1.1.1 2005/12/02 22:35:19 dsp_llnl Exp $
+####################################################################
+
+Copyright (C) 2002 The Regents of the University of California.
+Produced at the Lawrence Livermore National Laboratory.
+Written by David S. Peterson <dsp@llnl.gov>.
+UCRL-CODE-2003-012
+All rights reserved.
+
+This file is part of lxbios, a utility for reading/writing LinuxBIOS
+parameters and displaying information from the LinuxBIOS table.
+For details, see <http://www.llnl.gov/linux/lxbios/>.
+
+This program is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License (as published by the
+Free Software Foundation) version 2, dated June 1991.
+
+This program is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+conditions of the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+
+This work was produced at the University of California, Lawrence Livermore
+National Laboratory (UC LLNL) under contract no. W-7405-ENG-48 (Contract 48)
+between the U.S. Department of Energy (DOE) and The Regents of the
+University of California (University) for the operation of UC LLNL.
+The rights of the Federal Government are reserved under Contract 48 subject
+to the restrictions agreed upon by the DOE and University as allowed under
+DOE Acquisition Letter 97-1.
+
+#############################################################################
+
+OUR NOTICE AND TERMS AND CONDITIONS OF THE GNU GENERAL PUBLIC LICENSE
+
+Our Preamble Notice
+-------------------
+
+A.  This notice is required to be provided under our contract with the U.S.
+    Department of Energy (DOE).  This work was produced at the University of
+    California, Lawrence Livermore National Laboratory under Contract No.
+    W-7405-ENG-48 with the DOE.
+
+B.  Neither the United States Government nor the University of California nor
+    any of their employees, makes any warranty, express or implied, or
+    assumes any liability or responsibility for the accuracy, completeness,
+    or usefulness of any information, apparatus, product, or process
+    disclosed, or represents that its use would not infringe privately-owned
+    rights.
+
+C.  Also, reference herein to any specific commercial products, process, or
+    services by trade name, trademark, manufacturer or otherwise does not
+    necessarily constitute or imply its endorsement, recommendation, or
+    favoring by the United States Government or the University of California.
+    The views and opinions of authors expressed herein do not necessarily
+    state or reflect those of the United States Government or the University
+    of California, and shall not be used for advertising or product
+    endorsement purposes.  The precise terms and conditions for copying,
+    distribution and modification follows.
+
+GNU Terms and Conditions for Copying, Distribution, and Modification
+--------------------------------------------------------------------
+
+The precise terms and conditions of the GNU General Public License
+(version 2, dated June 1991) are contained in the file COPYING which is
+included in this software distribution.
Index: lxbios/common.h
===================================================================
--- lxbios/common.h	(revision 0)
+++ lxbios/common.h	(revision 0)
@@ -0,0 +1,72 @@
+/*****************************************************************************\
+ * common.h
+ * $Id: common.h,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
+ *****************************************************************************
+ *  Copyright (C) 2002-2005 The Regents of the University of California.
+ *  Produced at the Lawrence Livermore National Laboratory.
+ *  Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
+ *  UCRL-CODE-2003-012
+ *  All rights reserved.
+ *
+ *  This file is part of lxbios, a utility for reading/writing LinuxBIOS
+ *  parameters and displaying information from the LinuxBIOS table.
+ *  For details, see <http://www.llnl.gov/linux/lxbios/>.
+ *
+ *  Please also read the file DISCLAIMER which is included in this software
+ *  distribution.
+ *
+ *  This program is free software; you can redistribute it and/or modify it
+ *  under the terms of the GNU General Public License (as published by the
+ *  Free Software Foundation) version 2, dated June 1991.
+ *
+ *  This program is distributed in the hope that it will be useful, but
+ *  WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the terms and
+ *  conditions of the GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+\*****************************************************************************/
+
+#ifndef LXBIOS_COMMON_H
+#define LXBIOS_COMMON_H
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <assert.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#define FALSE 0
+#define TRUE 1
+
+#define BUG() assert(0)
+
+#define COMMON_RESULT_START 0x10000
+#define LAYOUT_RESULT_START 0x20000
+#define CMOS_RESULT_START 0x30000
+#define CMOS_OP_RESULT_START 0x40000
+
+#define OK 0  /* 0 is used universally to indicate success. */
+
+#define LINE_EOF (COMMON_RESULT_START + 0)
+#define LINE_TOO_LONG (COMMON_RESULT_START + 1)
+
+/* basename of this program, as reported by argv[0] */
+extern const char prog_name[];
+
+/* version of this program */
+extern const char prog_version[];
+
+int get_line_from_file (FILE *f, char line[], int line_buf_size);
+void out_of_memory (void);
+void usage (FILE *outfile);
+
+#endif  /* LXBIOS_COMMON_H */
