[U-Boot] [PATCH V2] arm: Use optimized memcpy and memset from linux

[Albert ARIBAUD <albert.aribaud@free.fr>]

Hi Matthias,

Le 26/01/2011 11:45, Matthias Weisser a ?crit :
> 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
>
> Changes since V1:
>    - Made the usage of these functions optional be CONFIG_USE_ARCH_MEM
>    - Usage of PLD instruction on all architectures supporting it
>    - Added a README entry
>    - Minor style fixes
>
> Signed-off-by: Matthias Weisser<weisserm@arcor.de>
> ---

Sorry for leaving this patch alone for so long.

Can you please just repost a (rebased) V3 with the history below the cut 
line so that it does not appear in the commit message? As it is not a 
fix but was tested on two different ARM archs, I think I'll add it to 
master rather than next so that it goes into mainline without delay.

Amicalement,
-- 
Albert.