Gitiles
Code Review Sign In
nv-tegra.nvidia.com / linux-5.10 / d2912cb15bdda8ba4a5dd73396ad62641af2f520 / . / arch / arm / lib / csumpartialcopy.S
blob: 184d97254a7a2de14cdf83e312383c6fe3071b8f [file] [log] [blame]
Thomas Gleixnerd2912cb2019-06-04 10:11:33 +0200[diff] [blame^]1/* SPDX-License-Identifier: GPL-2.0-only */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2/*
3 * linux/arch/arm/lib/csumpartialcopy.S
4 *
5 * Copyright (C) 1995-1998 Russell King
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]6 */
7#include <linux/linkage.h>
8#include <asm/assembler.h>
9
10 .text
11
12/* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum)
13 * Params : r0 = src, r1 = dst, r2 = len, r3 = checksum
14 * Returns : r0 = new checksum
15 */
16
17 .macro save_regs
Catalin Marinas22acc4e2008-08-29 18:31:27 +0100[diff] [blame]18 stmfd sp!, {r1, r4 - r8, lr}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]19 .endm
20
Catalin Marinas90303b12006-01-12 16:53:51 +0000[diff] [blame]21 .macro load_regs
Catalin Marinas22acc4e2008-08-29 18:31:27 +0100[diff] [blame]22 ldmfd sp!, {r1, r4 - r8, pc}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]23 .endm
24
25 .macro load1b, reg1
26 ldrb \reg1, [r0], #1
27 .endm
28
29 .macro load2b, reg1, reg2
30 ldrb \reg1, [r0], #1
31 ldrb \reg2, [r0], #1
32 .endm
33
34 .macro load1l, reg1
35 ldr \reg1, [r0], #4
36 .endm
37
38 .macro load2l, reg1, reg2
39 ldr \reg1, [r0], #4
40 ldr \reg2, [r0], #4
41 .endm
42
43 .macro load4l, reg1, reg2, reg3, reg4
44 ldmia r0!, {\reg1, \reg2, \reg3, \reg4}
45 .endm
46
47#define FN_ENTRY ENTRY(csum_partial_copy_nocheck)
Catalin Marinas93ed3972008-08-28 11:22:32 +0100[diff] [blame]48#define FN_EXIT ENDPROC(csum_partial_copy_nocheck)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]49
50#include "csumpartialcopygeneric.S"