| /* |
| * 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) |
