1 | /* |
2 | * M7copy_to_user.S: SPARC M7 optimized copy to userspace. |
3 | * |
4 | * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
5 | */ |
6 | |
7 | |
8 | #define EX_ST(x, y) \ |
9 | 98: x; \ |
10 | .section __ex_table,"a"; \ |
11 | .align 4; \ |
12 | .word 98b, y; \ |
13 | .text; \ |
14 | .align 4; |
15 | |
16 | #define EX_ST_FP(x, y) \ |
17 | 98: x; \ |
18 | .section __ex_table,"a"; \ |
19 | .align 4; \ |
20 | .word 98b, y##_fp; \ |
21 | .text; \ |
22 | .align 4; |
23 | |
24 | |
25 | #ifndef ASI_AIUS |
26 | #define ASI_AIUS 0x11 |
27 | #endif |
28 | |
29 | #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS |
30 | #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 |
31 | #endif |
32 | |
33 | #define FUNC_NAME M7copy_to_user |
34 | #define STORE(type,src,addr) type##a src, [addr] %asi |
35 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS |
36 | #define STORE_MRU_ASI ASI_ST_BLKINIT_MRU_S |
37 | #define EX_RETVAL(x) 0 |
38 | |
39 | #ifdef __KERNEL__ |
40 | /* Writing to %asi is _expensive_ so we hardcode it. |
41 | * Reading %asi to check for KERNEL_DS is comparatively |
42 | * cheap. |
43 | */ |
44 | #define PREAMBLE \ |
45 | rd %asi, %g1; \ |
46 | cmp %g1, ASI_AIUS; \ |
47 | bne,pn %icc, raw_copy_in_user; \ |
48 | nop |
49 | #endif |
50 | |
51 | #include "M7memcpy.S" |
52 | |