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