mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 09:44:18 +08:00
47 lines
1.2 KiB
ArmAsm
47 lines
1.2 KiB
ArmAsm
|
/*
|
||
|
|
* Copyright (C) 2012 ARM Ltd.
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <linux/const.h>
|
||
|
|
#include <asm/assembler.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copy a page from src to dest (both are page aligned)
|
||
|
|
*
|
||
|
|
* Parameters:
|
||
|
|
* x0 - dest
|
||
|
|
* x1 - src
|
||
|
|
*/
|
||
|
|
ENTRY(copy_page)
|
||
|
|
/* Assume cache line size is 64 bytes. */
|
||
|
|
prfm pldl1strm, [x1, #64]
|
||
|
|
1: ldp x2, x3, [x1]
|
||
|
|
ldp x4, x5, [x1, #16]
|
||
|
|
ldp x6, x7, [x1, #32]
|
||
|
|
ldp x8, x9, [x1, #48]
|
||
|
|
add x1, x1, #64
|
||
|
|
prfm pldl1strm, [x1, #64]
|
||
|
|
stnp x2, x3, [x0]
|
||
|
|
stnp x4, x5, [x0, #16]
|
||
|
|
stnp x6, x7, [x0, #32]
|
||
|
|
stnp x8, x9, [x0, #48]
|
||
|
|
add x0, x0, #64
|
||
|
|
tst x1, #(PAGE_SIZE - 1)
|
||
|
|
b.ne 1b
|
||
|
|
ret
|
||
|
|
ENDPROC(copy_page)
|