arch/arm/lib/csumpartialcopy.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  linux/arch/arm/lib/csumpartialcopy.S
   4  *
   5  *  Copyright (C) 1995-1998 Russell King
   6  */
   7 #include <linux/linkage.h>
   8 #include <asm/assembler.h>
   9
  10                 .text
  11
  12 /* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum)
  13  * Params  : r0 = src, r1 = dst, r2 = len, r3 = checksum
  14  * Returns : r0 = new checksum
  15  */
  16
  17                 .macro  save_regs
  18                 stmfd   sp!, {r1, r4 - r8, lr}
  19                 .endm
  20
  21                 .macro  load_regs
  22                 ldmfd   sp!, {r1, r4 - r8, pc}
  23                 .endm
  24
  25                 .macro  load1b, reg1
  26                 ldrb    \reg1, [r0], #1
  27                 .endm
  28
  29                 .macro  load2b, reg1, reg2
  30                 ldrb    \reg1, [r0], #1
  31                 ldrb    \reg2, [r0], #1
  32                 .endm
  33
  34                 .macro  load1l, reg1
  35                 ldr     \reg1, [r0], #4
  36                 .endm
  37
  38                 .macro  load2l, reg1, reg2
  39                 ldr     \reg1, [r0], #4
  40                 ldr     \reg2, [r0], #4
  41                 .endm
  42
  43                 .macro  load4l, reg1, reg2, reg3, reg4
  44                 ldmia   r0!, {\reg1, \reg2, \reg3, \reg4}
  45                 .endm
  46
  47 #define FN_ENTRY        ENTRY(csum_partial_copy_nocheck)
  48 #define FN_EXIT         ENDPROC(csum_partial_copy_nocheck)
  49
  50 #include "csumpartialcopygeneric.S"