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Diffstat (limited to 'arch/unicore32/lib/copy_page.S')
| -rw-r--r-- | arch/unicore32/lib/copy_page.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/unicore32/lib/copy_page.S b/arch/unicore32/lib/copy_page.S new file mode 100644 index 000000000..3a448d755 --- /dev/null +++ b/arch/unicore32/lib/copy_page.S @@ -0,0 +1,39 @@ +/* + * linux/arch/unicore32/lib/copy_page.S + * + * Code specific to PKUnity SoC and UniCore ISA + * + * Copyright (C) 2001-2010 GUAN Xue-tao + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * ASM optimised string functions + */ +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <generated/asm-offsets.h> +#include <asm/cache.h> + +#define COPY_COUNT (PAGE_SZ/256) + + .text + .align 5 +/* + * UniCore optimised copy_page routine + */ +ENTRY(copy_page) + stm.w (r17 - r19, lr), [sp-] + mov r17, r0 + mov r18, r1 + mov r19, #COPY_COUNT +1: + .rept 4 + ldm.w (r0 - r15), [r18]+ + stm.w (r0 - r15), [r17]+ + .endr + sub.a r19, r19, #1 + bne 1b + ldm.w (r17 - r19, pc), [sp]+ +ENDPROC(copy_page) |