xref: /openbmc/linux/arch/arm/lib/memcpy.S (revision 36fe4655)
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  linux/arch/arm/lib/memcpy.S
4 *
5 *  Author:	Nicolas Pitre
6 *  Created:	Sep 28, 2005
7 *  Copyright:	MontaVista Software, Inc.
8 */
9
10#include <linux/linkage.h>
11#include <asm/assembler.h>
12#include <asm/unwind.h>
13
14#define LDR1W_SHIFT	0
15#define STR1W_SHIFT	0
16
17	.macro ldr1w ptr reg abort
18	W(ldr) \reg, [\ptr], #4
19	.endm
20
21	.macro ldr4w ptr reg1 reg2 reg3 reg4 abort
22	ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
23	.endm
24
25	.macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
26	ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
27	.endm
28
29	.macro ldr1b ptr reg cond=al abort
30	ldrb\cond \reg, [\ptr], #1
31	.endm
32
33	.macro str1w ptr reg abort
34	W(str) \reg, [\ptr], #4
35	.endm
36
37	.macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
38	stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
39	.endm
40
41	.macro str1b ptr reg cond=al abort
42	strb\cond \reg, [\ptr], #1
43	.endm
44
45	.macro enter reg1 reg2
46	stmdb sp!, {r0, \reg1, \reg2}
47	.endm
48
49	.macro usave reg1 reg2
50	UNWIND(	.save	{r0, \reg1, \reg2}	)
51	.endm
52
53	.macro exit reg1 reg2
54	ldmfd sp!, {r0, \reg1, \reg2}
55	.endm
56
57	.text
58
59/* Prototype: void *memcpy(void *dest, const void *src, size_t n); */
60
61ENTRY(__memcpy)
62ENTRY(mmiocpy)
63WEAK(memcpy)
64
65#include "copy_template.S"
66
67ENDPROC(memcpy)
68ENDPROC(mmiocpy)
69ENDPROC(__memcpy)
70