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review.evervolv.com / android_kernel_htc_msm8960 / 004d6530f83bee43a55b51bb5960db96e7ae0ffa / . / arch / arm / lib / csumpartialcopy.S
blob: 21effe0dbf97e2b2f15ad1c3f6a2ab96a0ed9d43 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1/*
2 * linux/arch/arm/lib/csumpartialcopy.S
3 *
4 * Copyright (C) 1995-1998 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/linkage.h>
11#include <asm/assembler.h>
12
13 .text
14
15/* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum)
16 * Params : r0 = src, r1 = dst, r2 = len, r3 = checksum
17 * Returns : r0 = new checksum
18 */
19
20 .macro save_regs
Catalin Marinas90303b12006-01-12 16:53:51 +0000[diff] [blame]21 mov ip, sp
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]22 stmfd sp!, {r1, r4 - r8, fp, ip, lr, pc}
Catalin Marinas90303b12006-01-12 16:53:51 +0000[diff] [blame]23 sub fp, ip, #4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]24 .endm
25
Catalin Marinas90303b12006-01-12 16:53:51 +0000[diff] [blame]26 .macro load_regs
27 ldmfd sp, {r1, r4 - r8, fp, sp, pc}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]28 .endm
29
30 .macro load1b, reg1
31 ldrb \reg1, [r0], #1
32 .endm
33
34 .macro load2b, reg1, reg2
35 ldrb \reg1, [r0], #1
36 ldrb \reg2, [r0], #1
37 .endm
38
39 .macro load1l, reg1
40 ldr \reg1, [r0], #4
41 .endm
42
43 .macro load2l, reg1, reg2
44 ldr \reg1, [r0], #4
45 ldr \reg2, [r0], #4
46 .endm
47
48 .macro load4l, reg1, reg2, reg3, reg4
49 ldmia r0!, {\reg1, \reg2, \reg3, \reg4}
50 .endm
51
52#define FN_ENTRY ENTRY(csum_partial_copy_nocheck)
53
54#include "csumpartialcopygeneric.S"