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| /*
| * 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)
|
|
