2 * linux/arch/arm/mm/copypage-v3.c
4 * Copyright (C) 1995-1999 Russell King
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.
10 #include <linux/init.h>
15 * ARMv3 optimised copy_user_page
17 * FIXME: do we need to handle cache stuff...
19 void __attribute__((naked))
20 v3_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
23 stmfd sp!, {r4, lr} @ 2\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\
36 ldmfd sp!, {r4, pc} @ 3"
38 : "r" (kfrom), "r" (kto), "I" (PAGE_SIZE / 64));
42 * ARMv3 optimised clear_user_page
44 * FIXME: do we need to handle cache stuff...
46 void __attribute__((naked)) v3_clear_user_page(void *kaddr, unsigned long vaddr)
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\
63 : "r" (kaddr), "I" (PAGE_SIZE / 64));
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,