77c93b2f23
This patch implements low-level uaccess libraries. Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn> Acked-by: Arnd Bergmann <arnd@arndb.de>
40 lines
833 B
ArmAsm
40 lines
833 B
ArmAsm
/*
|
|
* linux/arch/unicore32/lib/copy_page.S
|
|
*
|
|
* Code specific to PKUnity SoC and UniCore ISA
|
|
*
|
|
* Copyright (C) 2001-2010 GUAN Xue-tao
|
|
*
|
|
* 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 <asm/assembler.h>
|
|
#include <generated/asm-offsets.h>
|
|
#include <asm/cache.h>
|
|
|
|
#define COPY_COUNT (PAGE_SZ/256)
|
|
|
|
.text
|
|
.align 5
|
|
/*
|
|
* UniCore optimised copy_page routine
|
|
*/
|
|
ENTRY(copy_page)
|
|
stm.w (r17 - r19, lr), [sp-]
|
|
mov r17, r0
|
|
mov r18, r1
|
|
mov r19, #COPY_COUNT
|
|
1:
|
|
.rept 4
|
|
ldm.w (r0 - r15), [r18]+
|
|
stm.w (r0 - r15), [r17]+
|
|
.endr
|
|
sub.a r19, r19, #1
|
|
bne 1b
|
|
ldm.w (r17 - r19, pc), [sp]+
|
|
ENDPROC(copy_page)
|