arch/arm/lib/memcpy.S

   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
  13 #include <linux/linkage.h>
  14 #include <asm/assembler.h>
  15 #include <asm/unwind.h>
  16
  17 #define LDR1W_SHIFT     0
  18 #define STR1W_SHIFT     0
  19
  20         .macro ldr1w ptr reg abort
  21         W(ldr) \reg, [\ptr], #4
  22         .endm
  23
  24         .macro ldr4w ptr reg1 reg2 reg3 reg4 abort
  25         ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
  26         .endm
  27
  28         .macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
  29         ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
  30         .endm
  31
  32         .macro ldr1b ptr reg cond=al abort
  33         ldr\cond\()b \reg, [\ptr], #1
  34         .endm
  35
  36         .macro str1w ptr reg abort
  37         W(str) \reg, [\ptr], #4
  38         .endm
  39
  40         .macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
  41         stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
  42         .endm
  43
  44         .macro str1b ptr reg cond=al abort
  45         str\cond\()b \reg, [\ptr], #1
  46         .endm
  47
  48         .macro enter reg1 reg2
  49         stmdb sp!, {r0, \reg1, \reg2}
  50         .endm
  51
  52         .macro usave reg1 reg2
  53         UNWIND( .save   {r0, \reg1, \reg2}      )
  54         .endm
  55
  56         .macro exit reg1 reg2
  57         ldmfd sp!, {r0, \reg1, \reg2}
  58         .endm
  59
  60         .text
  61
  62 /* Prototype: void *memcpy(void *dest, const void *src, size_t n); */
  63
  64 ENTRY(mmiocpy)
  65 ENTRY(memcpy)
  66
  67 #include "copy_template.S"
  68
  69 ENDPROC(memcpy)
  70 ENDPROC(mmiocpy)