2 * linux/arch/arm/mm/copypage-feroceon.S
4 * Copyright (C) 2008 Marvell Semiconductors
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 * This handles copy_user_page and clear_user_page on Feroceon
11 * more optimally than the generic implementations.
13 #include <linux/init.h>
17 void __attribute__((naked))
18 feroceon_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr)
21 stmfd sp!, {r4-r9, lr} \n\
24 ldmia r1!, {r2 - r9} \n\
32 stmia r0, {r2 - r9} \n\
33 ldmia r1!, {r2 - r9} \n\
34 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
36 stmia r0, {r2 - r9} \n\
37 ldmia r1!, {r2 - r9} \n\
38 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
40 stmia r0, {r2 - r9} \n\
41 ldmia r1!, {r2 - r9} \n\
42 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
44 stmia r0, {r2 - r9} \n\
45 ldmia r1!, {r2 - r9} \n\
46 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
48 stmia r0, {r2 - r9} \n\
49 ldmia r1!, {r2 - r9} \n\
50 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
52 stmia r0, {r2 - r9} \n\
53 ldmia r1!, {r2 - r9} \n\
54 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
56 stmia r0, {r2 - r9} \n\
57 ldmia r1!, {r2 - r9} \n\
58 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
60 stmia r0, {r2 - r9} \n\
61 subs ip, ip, #(32 * 8) \n\
62 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
65 mcr p15, 0, ip, c7, c10, 4 @ drain WB\n\
66 ldmfd sp!, {r4-r9, pc}"
71 void __attribute__((naked))
72 feroceon_clear_user_page(void *kaddr, unsigned long vaddr)
75 stmfd sp!, {r4-r7, lr} \n\
85 1: stmia r0, {r2-r7, ip, lr} \n\
87 mcr p15, 0, r0, c7, c14, 1 @ clean and invalidate D line\n\
90 mcr p15, 0, r1, c7, c10, 4 @ drain WB\n\
91 ldmfd sp!, {r4-r7, pc}"
93 : "I" (PAGE_SIZE / 32));
96 struct cpu_user_fns feroceon_user_fns __initdata = {
97 .cpu_clear_user_page = feroceon_clear_user_page,
98 .cpu_copy_user_page = feroceon_copy_user_page,