30 lines
443 B
ArmAsm
30 lines
443 B
ArmAsm
/* 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)
|