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 |
17 | NG4clear_page: /* %o0=dest */ |
18 | NG4clear_user_page: /* %o0=dest, %o1=vaddr */ |
19 | set PAGE_SIZE, %g7 |
20 | mov 0x20, %g3 |
21 | 1: 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 | |