Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/736
-gerrit
commit 6c495814c7da47fff7db57267915f5290ab1d560 Author: Stefan Reinauer reinauer@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@google.com Reviewed-by: Duncan Laurie dlaurie@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
-
Stefan Reinauer