[LinuxBIOS] r2493 - trunk/LinuxBIOSv2/util/flashrom
svn at openbios.org
svn at openbios.org
Tue Nov 7 12:16:25 CET 2006
Author: uwe
Date: 2006-11-07 12:16:21 +0100 (Tue, 07 Nov 2006)
New Revision: 2493
Modified:
trunk/LinuxBIOSv2/util/flashrom/flash_enable.c
Log:
Fix some code comments of the Intel PIIX4/PIIX4E/PIIX4M code.
Add detailed instructions on how and where to get the datasheet,
its name, and order number (Closes #34).
Signed-off-by: Uwe Hermann <uwe at hermann-uwe.de>
Acked-by: Stefan Reinauer <stepan at coresystems.de>
Modified: trunk/LinuxBIOSv2/util/flashrom/flash_enable.c
===================================================================
--- trunk/LinuxBIOSv2/util/flashrom/flash_enable.c 2006-11-07 10:22:20 UTC (rev 2492)
+++ trunk/LinuxBIOSv2/util/flashrom/flash_enable.c 2006-11-07 11:16:21 UTC (rev 2493)
@@ -77,7 +77,12 @@
return 0;
}
-/* Datasheet: http://www.intel.com/design/intarch/datashts/290562.htm */
+/* Datasheet:
+ * - Name: 82371AB PCI-TO-ISA / IDE XCELERATOR (PIIX4)
+ * - URL: http://www.intel.com/design/intarch/datashts/290562.htm
+ * - PDF: http://www.intel.com/design/intarch/datashts/29056201.pdf
+ * - Order Number: 290562-001
+ */
static int enable_flash_piix4(struct pci_dev *dev, char *name)
{
uint16_t old, new;
@@ -90,10 +95,11 @@
Set bit 7: Extended BIOS Enable (PCI master accesses to
FFF80000-FFFDFFFF are forwarded to ISA).
Set bit 6: Lower BIOS Enable (PCI master, or ISA master accesses to
- the lower 64-Kbyte BIOS block (E00000EFFFF) at the top
+ the lower 64-Kbyte BIOS block (E0000-EFFFF) at the top
of 1 Mbyte, or the aliases at the top of 4 Gbyte
- (FFFE0000-FFFEFFF) result in the generation of BIOSCS#.
- Set bit 2: BIOSCS# Write Protect Enable (1=enable, 0=disable). */
+ (FFFE0000-FFFEFFFF) result in the generation of BIOSCS#.
+ Note: Accesses to FFFF0000-FFFFFFFF are always forwarded to ISA.
+ Set bit 2: BIOSCS# Write Enable (1=enable, 0=disable). */
new = old | 0x2c4;
if (new == old)
More information about the coreboot
mailing list