summaryrefslogtreecommitdiff
path: root/arch/alpha/lib/ev6-clear_page.S
blob: a534d9ff7161c9f30bb70012bdea37f46785ae0b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * arch/alpha/lib/ev6-clear_page.S
 *
 * Zero an entire page.
 */
#include <linux/export.h>
        .text
        .align 4
        .global clear_page
        .ent clear_page
clear_page:
        .prologue 0

	lda	$0,128
	lda	$1,125
	addq	$16,64,$2
	addq	$16,128,$3

	addq	$16,192,$17
	wh64	($16)
	wh64	($2)
	wh64	($3)

1:	wh64	($17)
	stq	$31,0($16)
	subq	$0,1,$0
	subq	$1,1,$1

	stq	$31,8($16)
	stq	$31,16($16)
	addq	$17,64,$2
	nop

	stq	$31,24($16)
	stq	$31,32($16)
	cmovgt	$1,$2,$17
	nop

	stq	$31,40($16)
	stq	$31,48($16)
	nop
	nop

	stq	$31,56($16)
	addq	$16,64,$16
	nop
	bne	$0,1b

	ret
	nop
	nop
	nop

	.end clear_page
	EXPORT_SYMBOL(clear_page)