63 строки
1.5 KiB
ArmAsm
63 строки
1.5 KiB
ArmAsm
/*
|
|
* linux/arch/arm26/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 <asm/assembler.h>
|
|
#include <asm/asm_offsets.h>
|
|
|
|
.text
|
|
.align 5
|
|
/*
|
|
* ARMv3 optimised copy_user_page
|
|
*
|
|
* FIXME: rmk do we need to handle cache stuff...
|
|
* FIXME: im is this right on ARM26?
|
|
*/
|
|
ENTRY(__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
|
|
LOADREGS(fd, sp!, {r4, pc}) @ 3
|
|
|
|
.align 5
|
|
/*
|
|
* ARMv3 optimised clear_user_page
|
|
*
|
|
* FIXME: rmk do we need to handle cache stuff...
|
|
*/
|
|
ENTRY(__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
|
|
|
|
.section ".init.text", #alloc, #execinstr
|
|
|