1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * linux/arch/arm/lib/csumpartialcopy.S
4 *
5 * Copyright (C) 1995-1998 Russell King
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
18 stmfd sp!, {r1, r4 - r8, lr}
19 .endm
20
21 .macro load_regs
22 ldmfd sp!, {r1, r4 - r8, pc}
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)
48 #define FN_EXIT ENDPROC(csum_partial_copy_nocheck)
49
50 #include "csumpartialcopygeneric.S"