1/*
2 * Copyright (C) 2012 ARM Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#include <linux/linkage.h>
18#include <linux/const.h>
19#include <asm/assembler.h>
20#include <asm/page.h>
21
22/*
23 * Copy a page from src to dest (both are page aligned)
24 *
25 * Parameters:
26 *	x0 - dest
27 *	x1 - src
28 */
29ENTRY(copy_page)
30	/* Assume cache line size is 64 bytes. */
31	prfm	pldl1strm, [x1, #64]
321:	ldp	x2, x3, [x1]
33	ldp	x4, x5, [x1, #16]
34	ldp	x6, x7, [x1, #32]
35	ldp	x8, x9, [x1, #48]
36	add	x1, x1, #64
37	prfm	pldl1strm, [x1, #64]
38	stnp	x2, x3, [x0]
39	stnp	x4, x5, [x0, #16]
40	stnp	x6, x7, [x0, #32]
41	stnp	x8, x9, [x0, #48]
42	add	x0, x0, #64
43	tst	x1, #(PAGE_SIZE - 1)
44	b.ne	1b
45	ret
46ENDPROC(copy_page)
47