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1da177e4 LT |
1 | /* |
2 | * linux/arch/arm26/lib/copypage.S | |
3 | * | |
4 | * Copyright (C) 1995-1999 Russell King | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * ASM optimised string functions | |
11 | */ | |
12 | #include <linux/linkage.h> | |
13 | #include <asm/assembler.h> | |
47003497 | 14 | #include <asm/asm-offsets.h> |
1da177e4 LT |
15 | |
16 | .text | |
17 | .align 5 | |
18 | /* | |
19 | * ARMv3 optimised copy_user_page | |
20 | * | |
21 | * FIXME: rmk do we need to handle cache stuff... | |
22 | * FIXME: im is this right on ARM26? | |
23 | */ | |
24 | ENTRY(__copy_user_page) | |
25 | stmfd sp!, {r4, lr} @ 2 | |
26 | mov r2, #PAGE_SZ/64 @ 1 | |
27 | ldmia r1!, {r3, r4, ip, lr} @ 4+1 | |
28 | 1: stmia r0!, {r3, r4, ip, lr} @ 4 | |
29 | ldmia r1!, {r3, r4, ip, lr} @ 4+1 | |
30 | stmia r0!, {r3, r4, ip, lr} @ 4 | |
31 | ldmia r1!, {r3, r4, ip, lr} @ 4+1 | |
32 | stmia r0!, {r3, r4, ip, lr} @ 4 | |
33 | ldmia r1!, {r3, r4, ip, lr} @ 4 | |
34 | subs r2, r2, #1 @ 1 | |
35 | stmia r0!, {r3, r4, ip, lr} @ 4 | |
36 | ldmneia r1!, {r3, r4, ip, lr} @ 4 | |
37 | bne 1b @ 1 | |
38 | LOADREGS(fd, sp!, {r4, pc}) @ 3 | |
39 | ||
40 | .align 5 | |
41 | /* | |
42 | * ARMv3 optimised clear_user_page | |
43 | * | |
44 | * FIXME: rmk do we need to handle cache stuff... | |
45 | */ | |
46 | ENTRY(__clear_user_page) | |
47 | str lr, [sp, #-4]! | |
48 | mov r1, #PAGE_SZ/64 @ 1 | |
49 | mov r2, #0 @ 1 | |
50 | mov r3, #0 @ 1 | |
51 | mov ip, #0 @ 1 | |
52 | mov lr, #0 @ 1 | |
53 | 1: stmia r0!, {r2, r3, ip, lr} @ 4 | |
54 | stmia r0!, {r2, r3, ip, lr} @ 4 | |
55 | stmia r0!, {r2, r3, ip, lr} @ 4 | |
56 | stmia r0!, {r2, r3, ip, lr} @ 4 | |
57 | subs r1, r1, #1 @ 1 | |
58 | bne 1b @ 1 | |
59 | ldr pc, [sp], #4 | |
60 | ||
61 | .section ".init.text", #alloc, #execinstr | |
62 |