Commit | Line | Data |
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77c93b2f G |
1 | /* |
2 | * linux/arch/unicore32/lib/copy_page.S | |
3 | * | |
4 | * Code specific to PKUnity SoC and UniCore ISA | |
5 | * | |
6 | * Copyright (C) 2001-2010 GUAN Xue-tao | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | * | |
12 | * ASM optimised string functions | |
13 | */ | |
14 | #include <linux/linkage.h> | |
15 | #include <asm/assembler.h> | |
16 | #include <generated/asm-offsets.h> | |
17 | #include <asm/cache.h> | |
18 | ||
19 | #define COPY_COUNT (PAGE_SZ/256) | |
20 | ||
21 | .text | |
22 | .align 5 | |
23 | /* | |
24 | * UniCore optimised copy_page routine | |
25 | */ | |
26 | ENTRY(copy_page) | |
27 | stm.w (r17 - r19, lr), [sp-] | |
28 | mov r17, r0 | |
29 | mov r18, r1 | |
30 | mov r19, #COPY_COUNT | |
31 | 1: | |
32 | .rept 4 | |
33 | ldm.w (r0 - r15), [r18]+ | |
34 | stm.w (r0 - r15), [r17]+ | |
35 | .endr | |
36 | sub.a r19, r19, #1 | |
37 | bne 1b | |
38 | ldm.w (r17 - r19, pc), [sp]+ | |
39 | ENDPROC(copy_page) |