Commit | Line | Data |
---|---|---|
d73e60b7 RK |
1 | /* |
2 | * linux/arch/arm/mm/copypage-v3.c | |
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 | #include <linux/init.h> | |
11 | ||
12 | #include <asm/page.h> | |
13 | ||
14 | /* | |
15 | * ARMv3 optimised copy_user_page | |
16 | * | |
17 | * FIXME: do we need to handle cache stuff... | |
18 | */ | |
19 | void __attribute__((naked)) | |
20 | v3_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr) | |
21 | { | |
22 | asm("\n\ | |
23 | stmfd sp!, {r4, lr} @ 2\n\ | |
24 | mov r2, %2 @ 1\n\ | |
25 | ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\ | |
26 | 1: stmia %1!, {r3, r4, ip, lr} @ 4\n\ | |
27 | ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\ | |
28 | stmia %1!, {r3, r4, ip, lr} @ 4\n\ | |
29 | ldmia %0!, {r3, r4, ip, lr} @ 4+1\n\ | |
30 | stmia %1!, {r3, r4, ip, lr} @ 4\n\ | |
31 | ldmia %0!, {r3, r4, ip, lr} @ 4\n\ | |
32 | subs r2, r2, #1 @ 1\n\ | |
33 | stmia %1!, {r3, r4, ip, lr} @ 4\n\ | |
34 | ldmneia %0!, {r3, r4, ip, lr} @ 4\n\ | |
35 | bne 1b @ 1\n\ | |
36 | ldmfd sp!, {r4, pc} @ 3" | |
37 | : | |
38 | : "r" (kfrom), "r" (kto), "I" (PAGE_SIZE / 64)); | |
39 | } | |
40 | ||
41 | /* | |
42 | * ARMv3 optimised clear_user_page | |
43 | * | |
44 | * FIXME: do we need to handle cache stuff... | |
45 | */ | |
46 | void __attribute__((naked)) v3_clear_user_page(void *kaddr, unsigned long vaddr) | |
47 | { | |
48 | asm("\n\ | |
49 | str lr, [sp, #-4]!\n\ | |
50 | mov r1, %1 @ 1\n\ | |
51 | mov r2, #0 @ 1\n\ | |
52 | mov r3, #0 @ 1\n\ | |
53 | mov ip, #0 @ 1\n\ | |
54 | mov lr, #0 @ 1\n\ | |
55 | 1: stmia %0!, {r2, r3, ip, lr} @ 4\n\ | |
56 | stmia %0!, {r2, r3, ip, lr} @ 4\n\ | |
57 | stmia %0!, {r2, r3, ip, lr} @ 4\n\ | |
58 | stmia %0!, {r2, r3, ip, lr} @ 4\n\ | |
59 | subs r1, r1, #1 @ 1\n\ | |
60 | bne 1b @ 1\n\ | |
61 | ldr pc, [sp], #4" | |
62 | : | |
63 | : "r" (kaddr), "I" (PAGE_SIZE / 64)); | |
64 | } | |
65 | ||
66 | struct cpu_user_fns v3_user_fns __initdata = { | |
67 | .cpu_clear_user_page = v3_clear_user_page, | |
68 | .cpu_copy_user_page = v3_copy_user_page, | |
69 | }; |