2012-03-05 19:49:33 +08:00
|
|
|
/*
|
|
|
|
|
* 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>
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Clear page @dest
|
|
|
|
|
*
|
|
|
|
|
* Parameters:
|
|
|
|
|
* x0 - dest
|
|
|
|
|
*/
|
|
|
|
|
ENTRY(clear_page)
|
|
|
|
|
mrs x1, dczid_el0
|
|
|
|
|
and w1, w1, #0xf
|
|
|
|
|
mov x2, #4
|
|
|
|
|
lsl x1, x2, x1
|
|
|
|
|
|
|
|
|
|
1: dc zva, x0
|
|
|
|
|
add x0, x0, x1
|
|
|
|
|
tst x0, #(PAGE_SIZE - 1)
|
|
|
|
|
b.ne 1b
|
|
|
|
|
ret
|
|
|
|
|
ENDPROC(clear_page)
|
2018-12-08 02:08:19 +08:00
|
|
|
EXPORT_SYMBOL(clear_page)
|
