arch/arm/lib/csumpartialcopy.S

   1 /*
   2  *  linux/arch/arm/lib/csumpartialcopy.S
   3  *
   4  *  Copyright (C) 1995-1998 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #include <linux/linkage.h>
  11 #include <asm/assembler.h>
  12
  13                 .text
  14
  15 /* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum)
  16  * Params  : r0 = src, r1 = dst, r2 = len, r3 = checksum
  17  * Returns : r0 = new checksum
  18  */
  19
  20                 .macro  save_regs
  21                 mov     ip, sp
  22                 stmfd   sp!, {r1, r4 - r8, fp, ip, lr, pc}
  23                 sub     fp, ip, #4
  24                 .endm
  25
  26                 .macro  load_regs
  27                 ldmfd   sp, {r1, r4 - r8, fp, sp, pc}
  28                 .endm
  29
  30                 .macro  load1b, reg1
  31                 ldrb    \reg1, [r0], #1
  32                 .endm
  33
  34                 .macro  load2b, reg1, reg2
  35                 ldrb    \reg1, [r0], #1
  36                 ldrb    \reg2, [r0], #1
  37                 .endm
  38
  39                 .macro  load1l, reg1
  40                 ldr     \reg1, [r0], #4
  41                 .endm
  42
  43                 .macro  load2l, reg1, reg2
  44                 ldr     \reg1, [r0], #4
  45                 ldr     \reg2, [r0], #4
  46                 .endm
  47
  48                 .macro  load4l, reg1, reg2, reg3, reg4
  49                 ldmia   r0!, {\reg1, \reg2, \reg3, \reg4}
  50                 .endm
  51
  52 #define FN_ENTRY        ENTRY(csum_partial_copy_nocheck)
  53 #define FN_EXIT         ENDPROC(csum_partial_copy_nocheck)
  54
  55 #include "csumpartialcopygeneric.S"