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) 67