From d8834a1323af72f6145bc81adadd75185ef6065f Mon Sep 17 00:00:00 2001 From: Matthias Weisser Date: Thu, 10 Mar 2011 21:36:32 +0000 Subject: 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 --- arch/arm/include/asm/string.h | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'arch/arm/include/asm/string.h') 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 + /* * 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 -- cgit