1/* SPDX-License-Identifier: GPL-2.0 */
2/* NG4copy_page.S: Niagara-4 optimized clear page.
3 *
4 * Copyright (C) 2012 (davem@davemloft.net)
5 */
6
7#include <asm/asi.h>
8#include <asm/page.h>
9
10	.text
11
12	.register	%g3, #scratch
13
14	.align		32
15	.globl		NG4clear_page
16	.globl		NG4clear_user_page
17NG4clear_page:		/* %o0=dest */
18NG4clear_user_page:	/* %o0=dest, %o1=vaddr */
19	set		PAGE_SIZE, %g7
20	mov		0x20, %g3
211:	stxa		%g0, [%o0 + %g0] ASI_ST_BLKINIT_MRU_P
22	subcc		%g7, 0x40, %g7
23	stxa		%g0, [%o0 + %g3] ASI_ST_BLKINIT_MRU_P
24	bne,pt		%xcc, 1b
25	 add		%o0, 0x40, %o0
26	membar		#StoreLoad|#StoreStore
27	retl
28	 nop
29	.size		NG4clear_page,.-NG4clear_page
30	.size		NG4clear_user_page,.-NG4clear_user_page
31