diff options
| author | Matthias Weisser <weisserm@arcor.de> | 2011-03-10 21:36:32 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-04-27 19:38:07 +0200 |
| commit | d8834a1323af72f6145bc81adadd75185ef6065f (patch) | |
| tree | c8e04b59f251c9ea1e8dc0097ba8ca83a6fef31f /arch/arm/include/asm/string.h | |
| parent | b65a77a8613d974cb665d14c51a012a8c12b8ba1 (diff) | |
arm: Use optimized memcpy and memset from linux
Using optimized versions of memset and memcpy from linux brings a quite
noticeable speed (x2 or better) improvement for these two functions.
Here are some numbers for test done with jadecpu
| HEAD(1)| HEAD(1)| HEAD(2)| HEAD(2)|
| | +patch | | +patch |
---------------------------+--------+--------+--------+--------+
Reset to prompt | 438ms | 330ms | 228ms | 120ms |
| | | | |
TFTP a 3MB img | 4782ms | 3428ms | 3245ms | 2820ms |
| | | | |
FATLOAD USB a 3MB img* | 8515ms | 8510ms | ------ | ------ |
| | | | |
BOOTM LZO img in RAM | 3473ms | 3168ms | 592ms | 592ms |
where CRC is | 615ms | 615ms | 54ms | 54ms |
uncompress | 2460ms | 2462ms | 450ms | 451ms |
final boot_elf | 376ms | 68ms | 65ms | 65ms |
| | | | |
BOOTM LZO img in FLASH | 3207ms | 2902ms | 1050ms | 1050ms |
where CRC is | 600ms | 600ms | 135ms | 135ms |
uncompress | 2209ms | 2211ms | 828ms | 828ms |
| | | | |
Copy 1.4MB from NOR to RAM | 134ms | 72ms | 120ms | 70ms |
(1) No dcache
(2) dcache enabled in board_init
*Does not work when dcache is on
Size impact:
C version:
text data bss dec hex filename
202862 18912 266456 488230 77326 u-boot
ASM version:
text data bss dec hex filename
203798 18912 266288 488998 77626 u-boot
222712 u-boot.bin
Signed-off-by: Matthias Weisser <weisserm@arcor.de>
Diffstat (limited to 'arch/arm/include/asm/string.h')
| -rw-r--r-- | arch/arm/include/asm/string.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/arm/include/asm/string.h b/arch/arm/include/asm/string.h index c3ea582cab..c6dfb254b5 100644 --- a/arch/arm/include/asm/string.h +++ b/arch/arm/include/asm/string.h @@ -1,6 +1,8 @@ #ifndef __ASM_ARM_STRING_H #define __ASM_ARM_STRING_H +#include <config.h> + /* * We don't do inline string functions, since the * optimised inline asm versions are not small. @@ -12,7 +14,9 @@ extern char * strrchr(const char * s, int c); #undef __HAVE_ARCH_STRCHR extern char * strchr(const char * s, int c); -#undef __HAVE_ARCH_MEMCPY +#ifdef CONFIG_USE_ARCH_MEMCPY +#define __HAVE_ARCH_MEMCPY +#endif extern void * memcpy(void *, const void *, __kernel_size_t); #undef __HAVE_ARCH_MEMMOVE @@ -22,7 +26,9 @@ extern void * memmove(void *, const void *, __kernel_size_t); extern void * memchr(const void *, int, __kernel_size_t); #undef __HAVE_ARCH_MEMZERO -#undef __HAVE_ARCH_MEMSET +#ifdef CONFIG_USE_ARCH_MEMSET +#define __HAVE_ARCH_MEMSET +#endif extern void * memset(void *, int, __kernel_size_t); #if 0 |