1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* NG2copy_to_user.S: Niagara-2 optimized copy to userspace. |
3 | * |
4 | * Copyright (C) 2007 David S. Miller (davem@davemloft.net) |
5 | */ |
6 | |
7 | #define EX_ST(x,y) \ |
8 | 98: x; \ |
9 | .section __ex_table,"a";\ |
10 | .align 4; \ |
11 | .word 98b, y; \ |
12 | .text; \ |
13 | .align 4; |
14 | |
15 | #define EX_ST_FP(x,y) \ |
16 | 98: x; \ |
17 | .section __ex_table,"a";\ |
18 | .align 4; \ |
19 | .word 98b, y##_fp; \ |
20 | .text; \ |
21 | .align 4; |
22 | |
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; \ |
49 | bne,pn %icc, raw_copy_in_user; \ |
50 | nop |
51 | #endif |
52 | |
53 | #include "NG2memcpy.S" |
54 | |