| /* SPDX-License-Identifier: GPL-2.0-only */ | |
| /* | |
| * Copyright (C) 2012 ARM Ltd. | |
| */ | |
| #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) | |
| EXPORT_SYMBOL(clear_page) |