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gerrit.openfyde.cn / github.com / raspberrypi / raspberrypi-kernel / d2912cb15bdda8ba4a5dd73396ad62641af2f520 / . / arch / arm / lib / memcpy.S
blob: 09a333153dc66409e4cbf81cb657253fa24fb428 [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/memcpy.S
4 *
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]5 * Author: Nicolas Pitre
6 * Created: Sep 28, 2005
7 * Copyright: MontaVista Software, Inc.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]8 */
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]9
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]10#include <linux/linkage.h>
11#include <asm/assembler.h>
Lin Yongting279f4872014-11-26 14:38:33 +0100[diff] [blame]12#include <asm/unwind.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]13
Catalin Marinas8b592782009-07-24 12:32:57 +0100[diff] [blame]14#define LDR1W_SHIFT 0
15#define STR1W_SHIFT 0
16
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]17 .macro ldr1w ptr reg abort
Catalin Marinas8b592782009-07-24 12:32:57 +0100[diff] [blame]18 W(ldr) \reg, [\ptr], #4
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]19 .endm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]20
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]21 .macro ldr4w ptr reg1 reg2 reg3 reg4 abort
22 ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
23 .endm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]24
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]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
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]28
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]29 .macro ldr1b ptr reg cond=al abort
Stefan Agnera2163762019-02-18 00:54:36 +0100[diff] [blame]30 ldrb\cond \reg, [\ptr], #1
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]31 .endm
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]32
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]33 .macro str1w ptr reg abort
Catalin Marinas8b592782009-07-24 12:32:57 +0100[diff] [blame]34 W(str) \reg, [\ptr], #4
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]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
Stefan Agnera2163762019-02-18 00:54:36 +0100[diff] [blame]42 strb\cond \reg, [\ptr], #1
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]43 .endm
44
45 .macro enter reg1 reg2
46 stmdb sp!, {r0, \reg1, \reg2}
47 .endm
48
Lin Yongting279f4872014-11-26 14:38:33 +0100[diff] [blame]49 .macro usave reg1 reg2
50 UNWIND( .save {r0, \reg1, \reg2} )
51 .endm
52
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]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
Russell King1bd46782015-07-03 15:22:54 +0100[diff] [blame]61ENTRY(mmiocpy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]62ENTRY(memcpy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]63
Nicolas Pitre75494232005-11-01 19:52:23 +0000[diff] [blame]64#include "copy_template.S"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]65
Catalin Marinas93ed3972008-08-28 11:22:32 +0100[diff] [blame]66ENDPROC(memcpy)
Russell King1bd46782015-07-03 15:22:54 +0100[diff] [blame]67ENDPROC(mmiocpy)