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kernel/linux-imx6_3.14.28/arch/arm/lib/csumpartialcopy.S 1.12 KB
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  /*
   *  linux/arch/arm/lib/csumpartialcopy.S
   *
   *  Copyright (C) 1995-1998 Russell King
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  #include <linux/linkage.h>
  #include <asm/assembler.h>
  
  		.text
  
  /* Function: __u32 csum_partial_copy_nocheck(const char *src, char *dst, int len, __u32 sum)
   * Params  : r0 = src, r1 = dst, r2 = len, r3 = checksum
   * Returns : r0 = new checksum
   */
  
  		.macro	save_regs
  		stmfd	sp!, {r1, r4 - r8, lr}
  		.endm
  
  		.macro	load_regs
  		ldmfd	sp!, {r1, r4 - r8, pc}
  		.endm
  
  		.macro	load1b, reg1
  		ldrb	\reg1, [r0], #1
  		.endm
  
  		.macro	load2b, reg1, reg2
  		ldrb	\reg1, [r0], #1
  		ldrb	\reg2, [r0], #1
  		.endm
  
  		.macro	load1l, reg1
  		ldr	\reg1, [r0], #4
  		.endm
  
  		.macro	load2l, reg1, reg2
  		ldr	\reg1, [r0], #4
  		ldr	\reg2, [r0], #4
  		.endm
  
  		.macro	load4l, reg1, reg2, reg3, reg4
  		ldmia	r0!, {\reg1, \reg2, \reg3, \reg4}
  		.endm
  
  #define FN_ENTRY	ENTRY(csum_partial_copy_nocheck)
  #define FN_EXIT		ENDPROC(csum_partial_copy_nocheck)
  
  #include "csumpartialcopygeneric.S"