linux/arch/m32r/mm/page.S
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

83 lines
1.2 KiB
ArmAsm

/*
* linux/arch/m32r/mm/page.S
*
* Clear/Copy page with CPU
*
* Copyright (C) 2004 The Free Software Initiative of Japan
*
* Written by Niibe Yutaka
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
*/
.text
.global copy_page
/*
* copy_page (to, from)
*
* PAGE_SIZE = 4096-byte
* Cache line = 16-byte
* 16 * 256
*/
.align 4
copy_page:
ldi r2, #255
ld r3, @r0 /* cache line allocate */
ld r4, @r1+
ld r5, @r1+
ld r6, @r1+
ld r7, @r1+
.fillinsn
0:
st r4, @r0
st r5, @+r0
st r6, @+r0
st r7, @+r0
ld r4, @r1+
addi r0, #4
ld r5, @r1+
ld r6, @r1+
ld r7, @r1+
ld r3, @r0 /* cache line allocate */
addi r2, #-1
bnez r2, 0b
st r4, @r0
st r5, @+r0
st r6, @+r0
st r7, @+r0
jmp r14
.text
.global clear_page
/*
* clear_page (to)
*
* PAGE_SIZE = 4096-byte
* Cache line = 16-byte
* 16 * 256
*/
.align 4
clear_page:
ldi r2, #255
ldi r4, #0
ld r3, @r0 /* cache line allocate */
.fillinsn
0:
st r4, @r0
st r4, @+r0
st r4, @+r0
st r4, @+r0
addi r0, #4
ld r3, @r0 /* cache line allocate */
addi r2, #-1
bnez r2, 0b
st r4, @r0
st r4, @+r0
st r4, @+r0
st r4, @+r0
jmp r14