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
46 UNWIND( .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
58 ENTRY(__memcpy)
59 ENTRY(mmiocpy)
60 WEAK(memcpy)
61
62 #include "copy_template.S"
63
64 ENDPROC(memcpy)
65 ENDPROC(mmiocpy)
66 ENDPROC(__memcpy)
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