diff options
| author | Stefan Reinauer <reinauer@chromium.org> | 2011-10-25 23:43:34 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2012-03-30 00:51:31 +0200 |
| commit | 0054afa11daa8db78dbe6aa55150238525187596 (patch) | |
| tree | 4abd0ccc44c48378c3257816b9e0f6c878a3abd2 /src/arch/x86/lib | |
| parent | 19e7e7d2e7cb4ff0ae821448355ec8b14e0bd2bf (diff) | |
Add faster, architecture dependent memcpy()
Change-Id: I38d15f3f1ec65f0cb7974d2dd4ae6356433bddd8
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-by: Duncan Laurie <dlaurie@google.com>
Reviewed-on: http://review.coreboot.org/736
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/arch/x86/lib')
| -rw-r--r-- | src/arch/x86/lib/Makefile.inc | 4 | ||||
| -rw-r--r-- | src/arch/x86/lib/memcpy.c | 13 |
2 files changed, 17 insertions, 0 deletions
diff --git a/src/arch/x86/lib/Makefile.inc b/src/arch/x86/lib/Makefile.inc index 3388a9dea3..f99e429eef 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 0000000000..de210928a3 --- /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; +} |