[coreboot] Patch set updated for coreboot: cd9b58d Add faster, architecture dependent memcpy()
Stefan Reinauer (stefan.reinauer@coreboot.org)
gerrit at coreboot.org
Fri Mar 9 17:01:31 CET 2012
Stefan Reinauer (stefan.reinauer at coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/736
-gerrit
commit cd9b58d837659425fe8641d2938f99d0aba01fef
Author: Stefan Reinauer <reinauer at chromium.org>
Date: Tue Oct 25 23:43:34 2011 +0000
Add faster, architecture dependent memcpy()
Change-Id: I38d15f3f1ec65f0cb7974d2dd4ae6356433bddd8
Signed-off-by: Stefan Reinauer <reinauer at google.com>
Reviewed-by: Duncan Laurie <dlaurie at google.com>
---
src/arch/x86/Kconfig | 4 ++++
src/arch/x86/lib/Makefile.inc | 4 ++++
src/arch/x86/lib/memcpy.c | 13 +++++++++++++
src/lib/Makefile.inc | 9 ++++++++-
4 files changed, 29 insertions(+), 1 deletions(-)
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index e71d0f3..74933af 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -80,6 +80,10 @@ config CMOS_DEFAULT_FILE
config BOOTBLOCK_SOUTHBRIDGE_INIT
string
+config HAVE_ARCH_MEMCPY
+ bool
+ default y
+
config BIG_ENDIAN
bool
default n
diff --git a/src/arch/x86/lib/Makefile.inc b/src/arch/x86/lib/Makefile.inc
index 3388a9d..f99e429 100644
--- a/src/arch/x86/lib/Makefile.inc
+++ b/src/arch/x86/lib/Makefile.inc
@@ -8,8 +8,12 @@ ramstage-$(CONFIG_MMCONF_SUPPORT) += pci_ops_mmconf.c
ramstage-y += pci_ops_auto.c
ramstage-y += exception.c
ramstage-$(CONFIG_IOAPIC) += ioapic.c
+ramstage-y += memcpy.c
romstage-y += romstage_console.c
romstage-y += cbfs_and_run.c
+romstage-y += memcpy.c
+
+smm-y += memcpy.c
$(obj)/arch/x86/lib/console.ramstage.o :: $(obj)/build.h
diff --git a/src/arch/x86/lib/memcpy.c b/src/arch/x86/lib/memcpy.c
new file mode 100644
index 0000000..de21092
--- /dev/null
+++ b/src/arch/x86/lib/memcpy.c
@@ -0,0 +1,13 @@
+#include <string.h>
+
+void *memcpy(void *__restrict __dest,
+ __const void *__restrict __src, size_t __n)
+{
+ asm("cld\n"
+ "rep\n"
+ "movsb"
+ : /* no input (?) */
+ :"S"(__src), "D"(__dest), "c"(__n)
+ );
+ return __dest;
+}
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 45cb788..61b6451 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -2,7 +2,9 @@
romstage-y += memset.c
romstage-y += memchr.c
+ifneq ($(CONFIG_HAVE_ARCH_MEMCPY),y)
romstage-y += memcpy.c
+endif
romstage-y += memcmp.c
romstage-y += cbfs.c
romstage-y += lzma.c
@@ -19,7 +21,9 @@ romstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
ramstage-y += memset.c
ramstage-y += memchr.c
+ifneq ($(CONFIG_HAVE_ARCH_MEMCPY),y)
ramstage-y += memcpy.c
+endif
ramstage-y += memcmp.c
ramstage-y += memmove.c
ramstage-y += malloc.c
@@ -43,7 +47,10 @@ ramstage-$(CONFIG_COLLECT_TIMESTAMPS) += timestamp.c
driver-$(CONFIG_CONSOLE_NE2K) += ne2k.c
-smm-y += memcpy.c cbfs.c memset.c memcmp.c
+ifneq ($(CONFIG_HAVE_ARCH_MEMCPY),y)
+smm-y += memcpy.c
+endif
+smm-y += cbfs.c memset.c memcmp.c
smm-$(CONFIG_CONSOLE_SERIAL8250) += uart8250.c
smm-$(CONFIG_CONSOLE_SERIAL8250MEM) += uart8250mem.c
smm-$(CONFIG_USBDEBUG) += usbdebug.c
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