| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/lib/memcpy.S |
| 3 | * |
| 4 | * Author: Nicolas Pitre |
| 5 | * Created: Sep 28, 2005 |
| 6 | * Copyright: MontaVista Software, Inc. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | #define FORCE_ARM 1 |
| 13 | .syntax divided |
| 14 | |
| 15 | #undef PSR_ISETSTATE |
| 16 | #undef ARM |
| 17 | #undef THUMB |
| 18 | #undef W |
| 19 | #undef BSYM |
| 20 | |
| 21 | /* The CPSR bit describing the instruction set (ARM) */ |
| 22 | #define PSR_ISETSTATE 0 |
| 23 | |
| 24 | #define ARM(x...) x |
| 25 | #define THUMB(x...) |
| 26 | #define W(instr) instr |
| 27 | #define BSYM(sym) sym |
| 28 | |
| 29 | .arm |
| 30 | |
| 31 | #include <linux/linkage.h> |
| 32 | #include <asm/assembler.h> |
| 33 | |
| 34 | #define LDR1W_SHIFT 0 |
| 35 | #define STR1W_SHIFT 0 |
| 36 | |
| 37 | .macro ldr1w ptr reg abort |
| 38 | W(ldr) \reg, [\ptr], #4 |
| 39 | .endm |
| 40 | |
| 41 | .macro ldr4w ptr reg1 reg2 reg3 reg4 abort |
| 42 | ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4} |
| 43 | .endm |
| 44 | |
| 45 | .macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort |
| 46 | ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8} |
| 47 | .endm |
| 48 | |
| 49 | .macro ldr1b ptr reg cond=al abort |
| 50 | ldr\cond\()b \reg, [\ptr], #1 |
| 51 | .endm |
| 52 | |
| 53 | .macro str1w ptr reg abort |
| 54 | W(str) \reg, [\ptr], #4 |
| 55 | .endm |
| 56 | |
| 57 | .macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort |
| 58 | stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8} |
| 59 | .endm |
| 60 | |
| 61 | .macro str1b ptr reg cond=al abort |
| 62 | str\cond\()b \reg, [\ptr], #1 |
| 63 | .endm |
| 64 | |
| 65 | .macro enter reg1 reg2 |
| 66 | stmdb sp!, {r0, \reg1, \reg2} |
| 67 | .endm |
| 68 | |
| 69 | .macro exit reg1 reg2 |
| 70 | ldmfd sp!, {r0, \reg1, \reg2} |
| 71 | .endm |
| 72 | |
| 73 | .text |
| 74 | |
| 75 | /* Prototype: void *memcpy(void *dest, const void *src, size_t n); */ |
| 76 | |
| 77 | ENTRY(memcpy) |
| 78 | |
| 79 | #include "copy_template.S" |
| 80 | |
| 81 | ENDPROC(memcpy) |