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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
cf5adce1 DM |
2 | /* NG2copy_to_user.S: Niagara-2 optimized copy to userspace. |
3 | * | |
4 | * Copyright (C) 2007 David S. Miller (davem@davemloft.net) | |
5 | */ | |
6 | ||
e93704e4 | 7 | #define EX_ST(x,y) \ |
cf5adce1 | 8 | 98: x; \ |
cf5adce1 DM |
9 | .section __ex_table,"a";\ |
10 | .align 4; \ | |
e93704e4 | 11 | .word 98b, y; \ |
cf5adce1 DM |
12 | .text; \ |
13 | .align 4; | |
14 | ||
e93704e4 | 15 | #define EX_ST_FP(x,y) \ |
a7c5724b RG |
16 | 98: x; \ |
17 | .section __ex_table,"a";\ | |
18 | .align 4; \ | |
e93704e4 | 19 | .word 98b, y##_fp; \ |
a7c5724b RG |
20 | .text; \ |
21 | .align 4; | |
22 | ||
cf5adce1 DM |
23 | #ifndef ASI_AIUS |
24 | #define ASI_AIUS 0x11 | |
25 | #endif | |
26 | ||
27 | #ifndef ASI_BLK_AIUS_4V | |
28 | #define ASI_BLK_AIUS_4V 0x17 | |
29 | #endif | |
30 | ||
31 | #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS | |
32 | #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 | |
33 | #endif | |
34 | ||
35 | #define FUNC_NAME NG2copy_to_user | |
36 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS | |
37 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS | |
38 | #define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS_4V | |
39 | #define EX_RETVAL(x) 0 | |
40 | ||
41 | #ifdef __KERNEL__ | |
42 | /* Writing to %asi is _expensive_ so we hardcode it. | |
43 | * Reading %asi to check for KERNEL_DS is comparatively | |
44 | * cheap. | |
45 | */ | |
46 | #define PREAMBLE \ | |
47 | rd %asi, %g1; \ | |
48 | cmp %g1, ASI_AIUS; \ | |
31af2f36 | 49 | bne,pn %icc, raw_copy_in_user; \ |
cf5adce1 DM |
50 | nop |
51 | #endif | |
52 | ||
53 | #include "NG2memcpy.S" |