summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorStefan Reinauer <reinauer@chromium.org>2011-10-25 23:43:34 +0000
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-03-30 00:51:31 +0200
commit0054afa11daa8db78dbe6aa55150238525187596 (patch)
tree4abd0ccc44c48378c3257816b9e0f6c878a3abd2
parent19e7e7d2e7cb4ff0ae821448355ec8b14e0bd2bf (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)
-rw-r--r--src/arch/x86/Kconfig4
-rw-r--r--src/arch/x86/lib/Makefile.inc4
-rw-r--r--src/arch/x86/lib/memcpy.c13
-rw-r--r--src/lib/Makefile.inc9
4 files changed, 29 insertions, 1 deletions
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig
index 314646fdb9..5ee7c4ac77 100644
--- a/src/arch/x86/Kconfig
+++ b/src/arch/x86/Kconfig
@@ -76,6 +76,10 @@ 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 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 :: $(obj)/build.h
diff --git a/src/arch/x86/lib/memcpy.c b/src/arch/x86/lib/memcpy.c
new file mode 100644
index 0000000000..de210928a3
--- /dev/null
+++ b/src/arch/x86/lib/memcpy.c
@@ -0,0 +1,13 @@
+#include <string.h>
+
+void *memcpy(void *__restrict __dest,
+ __const void *__restrict __src, size_t __n)
+{
+ asm("cld\n"
+ "rep\n"
+ "movsb"
+ : /* no input (?) */
+ :"S"(__src), "D"(__dest), "c"(__n)
+ );
+ return __dest;
+}
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 45cb7887a0..61b6451d0b 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -2,7 +2,9 @@
romstage-y += memset.c
romstage-y += memchr.c
+ifneq ($(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