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/arch/arm26/lib/copy_page.S

https://bitbucket.org/evzijst/gittest
Assembly | 62 lines | 58 code | 4 blank | 0 comment | 0 complexity | 17ea295a2dc6c2565f46e6a9b9d92b7a MD5 | raw file
 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>
14#include <asm/asm_offsets.h>
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 */
24ENTRY(__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
281:	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 */
46ENTRY(__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
531:	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