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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 Marinas22acc4e2008-08-29 18:31:27 +010021 stmfd sp!, {r1, r4 - r8, lr}
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 .endm
23
Catalin Marinas90303b12006-01-12 16:53:51 +000024 .macro load_regs
Catalin Marinas22acc4e2008-08-29 18:31:27 +010025 ldmfd sp!, {r1, r4 - r8, pc}
Linus Torvalds1da177e2005-04-16 15:20:36 -070026 .endm
27
28 .macro load1b, reg1
29 ldrb \reg1, [r0], #1
30 .endm
31
32 .macro load2b, reg1, reg2
33 ldrb \reg1, [r0], #1
34 ldrb \reg2, [r0], #1
35 .endm
36
37 .macro load1l, reg1
38 ldr \reg1, [r0], #4
39 .endm
40
41 .macro load2l, reg1, reg2
42 ldr \reg1, [r0], #4
43 ldr \reg2, [r0], #4
44 .endm
45
46 .macro load4l, reg1, reg2, reg3, reg4
47 ldmia r0!, {\reg1, \reg2, \reg3, \reg4}
48 .endm
49
50#define FN_ENTRY ENTRY(csum_partial_copy_nocheck)
Catalin Marinas93ed3972008-08-28 11:22:32 +010051#define FN_EXIT ENDPROC(csum_partial_copy_nocheck)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53#include "csumpartialcopygeneric.S"