projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b3a04ed5 BM |
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 | ||
| 34060b8f | 8 | #define EX_ST(x, y) \ |
| b3a04ed5 BM |
9 | 98: x; \ |
| 10 | .section __ex_table,"a"; \ | |
| 11 | .align 4; \ | |
| 34060b8f | 12 | .word 98b, y; \ |
| b3a04ed5 BM |
13 | .text; \ |
| 14 | .align 4; | |
| 15 | ||
| 34060b8f | 16 | #define EX_ST_FP(x, y) \ |
| b3a04ed5 BM |
17 | 98: x; \ |
| 18 | .section __ex_table,"a"; \ | |
| 19 | .align 4; \ | |
| 34060b8f | 20 | .word 98b, y##_fp; \ |
| b3a04ed5 BM |
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; \ | |
| 34060b8f | 48 | nop |
| b3a04ed5 BM |
49 | #endif |
| 50 | ||
| 51 | #include "M7memcpy.S" |