| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 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" |