xref: /openbmc/linux/arch/arm/lib/memcpy.S (revision 8a1e6bb3) 
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 regs:vararg
46UNWIND( .save	{r0, \regs}		)
47	stmdb sp!, {r0, \regs}
48	.endm
49
50	.macro exit regs:vararg
51	ldmfd sp!, {r0, \regs}
52	.endm
53
54	.text
55
56/* Prototype: void *memcpy(void *dest, const void *src, size_t n); */
57
58ENTRY(__memcpy)
59ENTRY(mmiocpy)
60WEAK(memcpy)
61
62#include "copy_template.S"
63
64ENDPROC(memcpy)
65ENDPROC(mmiocpy)
66ENDPROC(__memcpy)
67