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| author | Michal Simek <monstr@monstr.eu> | 2010-04-22 07:28:48 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-05-06 11:21:58 +0200 |
| commit | 43f2a6e8b122378b9ad20cd8ea449cdb38f5d829 (patch) | |
| tree | 4dc5783b8c59f45d783db6fee994282bbe9b6b0d /arch/microblaze/kernel/misc.S | |
| parent | microblaze: invoke oom-killer from page fault (diff) | |
| download | linux-43f2a6e8b122378b9ad20cd8ea449cdb38f5d829.tar.xz linux-43f2a6e8b122378b9ad20cd8ea449cdb38f5d829.zip | |
microblaze: Remove "cache" optimized copy_page function
Current implementation doesn't handle dcache_line_length
correctly that's why is better to use generic memcpy.
Cache optimized function could be good way howto improve
performance but must be based on benchmarking not blind
function like this.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to '')
| -rw-r--r-- | arch/microblaze/kernel/misc.S | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/arch/microblaze/kernel/misc.S b/arch/microblaze/kernel/misc.S index 7cf86498326c..0fb5fc6c1fc2 100644 --- a/arch/microblaze/kernel/misc.S +++ b/arch/microblaze/kernel/misc.S @@ -93,39 +93,3 @@ early_console_reg_tlb_alloc: nop .size early_console_reg_tlb_alloc, . - early_console_reg_tlb_alloc - -/* - * Copy a whole page (4096 bytes). - */ -#define COPY_16_BYTES \ - lwi r7, r6, 0; \ - lwi r8, r6, 4; \ - lwi r9, r6, 8; \ - lwi r10, r6, 12; \ - swi r7, r5, 0; \ - swi r8, r5, 4; \ - swi r9, r5, 8; \ - swi r10, r5, 12 - - -/* FIXME DCACHE_LINE_BYTES (CONFIG_XILINX_MICROBLAZE0_DCACHE_LINE_LEN * 4)*/ -#define DCACHE_LINE_BYTES (4 * 4) - -.globl copy_page; -.type copy_page, @function -.align 4; -copy_page: - ori r11, r0, (PAGE_SIZE/DCACHE_LINE_BYTES) - 1 -_copy_page_loop: - COPY_16_BYTES -#if DCACHE_LINE_BYTES >= 32 - COPY_16_BYTES -#endif - addik r6, r6, DCACHE_LINE_BYTES - addik r5, r5, DCACHE_LINE_BYTES - bneid r11, _copy_page_loop - addik r11, r11, -1 - rtsd r15, 8 - nop - - .size copy_page, . - copy_page |