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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
9f825962 DM |
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 |