tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 ARM Ltd.
4 */
5
6#include <linux/linkage.h>
7#include <linux/const.h>
8#include <asm/assembler.h>
9#include <asm/page.h>
10
11/*
12 * Clear page @dest
13 *
14 * Parameters:
15 * x0 - dest
16 */
17SYM_FUNC_START(clear_page)
18 mrs x1, dczid_el0
19 and w1, w1, #0xf
20 mov x2, #4
21 lsl x1, x2, x1
22
231: dc zva, x0
24 add x0, x0, x1
25 tst x0, #(PAGE_SIZE - 1)
26 b.ne 1b
27 ret
28SYM_FUNC_END(clear_page)
29EXPORT_SYMBOL(clear_page)