smallsolar/u-boot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

arm: Use optimized memcpy and memset from linux

Browse Source 
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>
This commit is contained in:
Matthias Weisser
2011-03-10 21:36:32 +00:00
committed by Albert ARIBAUD
parent b65a77a861
commit d8834a1323
6 changed files with 443 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/include/asm/string.h
View File

@@ -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