Eric Lee / smarc-fsl-linux-kernel

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arch/arm/mm/copypage-v3.S 1.55 KB
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1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  /*
   *  linux/arch/arm/lib/copypage.S
   *
   *  Copyright (C) 1995-1999 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.
   *
   *  ASM optimised string functions
   */
  #include <linux/linkage.h>
  #include <linux/init.h>
  #include <asm/assembler.h>
e6ae744dd   Sam Ravnborg   kbuild: arm - use... 
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  #include <asm/asm-offsets.h>
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  		.text
  		.align	5
  /*
   * ARMv3 optimised copy_user_page
   *
   * FIXME: do we need to handle cache stuff...
   */
  ENTRY(v3_copy_user_page)
  	stmfd	sp!, {r4, lr}			@	2
  	mov	r2, #PAGE_SZ/64			@	1
  	ldmia	r1!, {r3, r4, ip, lr}		@	4+1
  1:	stmia	r0!, {r3, r4, ip, lr}		@	4
  	ldmia	r1!, {r3, r4, ip, lr}		@	4+1
  	stmia	r0!, {r3, r4, ip, lr}		@	4
  	ldmia	r1!, {r3, r4, ip, lr}		@	4+1
  	stmia	r0!, {r3, r4, ip, lr}		@	4
  	ldmia	r1!, {r3, r4, ip, lr}		@	4
  	subs	r2, r2, #1			@	1
  	stmia	r0!, {r3, r4, ip, lr}		@	4
  	ldmneia	r1!, {r3, r4, ip, lr}		@	4
  	bne	1b				@	1
1b93a7175   Russell King   [ARM] Remove LOAD... 
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  	ldmfd	sp!, {r4, pc}			@	3
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  	.align	5
  /*
   * ARMv3 optimised clear_user_page
   *
   * FIXME: do we need to handle cache stuff...
   */
  ENTRY(v3_clear_user_page)
  	str	lr, [sp, #-4]!
  	mov	r1, #PAGE_SZ/64			@ 1
  	mov	r2, #0				@ 1
  	mov	r3, #0				@ 1
  	mov	ip, #0				@ 1
  	mov	lr, #0				@ 1
  1:	stmia	r0!, {r2, r3, ip, lr}		@ 4
  	stmia	r0!, {r2, r3, ip, lr}		@ 4
  	stmia	r0!, {r2, r3, ip, lr}		@ 4
  	stmia	r0!, {r2, r3, ip, lr}		@ 4
  	subs	r1, r1, #1			@ 1
  	bne	1b				@ 1
  	ldr	pc, [sp], #4
  
  	__INITDATA
  
  	.type	v3_user_fns, #object
  ENTRY(v3_user_fns)
  	.long	v3_clear_user_page
  	.long	v3_copy_user_page
  	.size	v3_user_fns, . - v3_user_fns