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

source code of linux/arch/sparc/lib/NG4clear_page.S