xref: /openbmc/linux/arch/alpha/lib/ev6-clear_page.S (revision a36954f5)
1/*
2 * arch/alpha/lib/ev6-clear_page.S
3 *
4 * Zero an entire page.
5 */
6#include <asm/export.h>
7        .text
8        .align 4
9        .global clear_page
10        .ent clear_page
11clear_page:
12        .prologue 0
13
14	lda	$0,128
15	lda	$1,125
16	addq	$16,64,$2
17	addq	$16,128,$3
18
19	addq	$16,192,$17
20	wh64	($16)
21	wh64	($2)
22	wh64	($3)
23
241:	wh64	($17)
25	stq	$31,0($16)
26	subq	$0,1,$0
27	subq	$1,1,$1
28
29	stq	$31,8($16)
30	stq	$31,16($16)
31	addq	$17,64,$2
32	nop
33
34	stq	$31,24($16)
35	stq	$31,32($16)
36	cmovgt	$1,$2,$17
37	nop
38
39	stq	$31,40($16)
40	stq	$31,48($16)
41	nop
42	nop
43
44	stq	$31,56($16)
45	addq	$16,64,$16
46	nop
47	bne	$0,1b
48
49	ret
50	nop
51	nop
52	nop
53
54	.end clear_page
55	EXPORT_SYMBOL(clear_page)
56