projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ae2c6ca6 DM |
2 | /* NG4copy_to_user.S: Niagara-4 optimized copy to userspace. |
| 3 | * | |
| 4 | * Copyright (C) 2012 David S. Miller (davem@davemloft.net) | |
| 5 | */ | |
| 6 | ||
| 95707704 | 7 | #define EX_ST(x,y) \ |
| ae2c6ca6 DM |
8 | 98: x; \ |
| 9 | .section __ex_table,"a";\ | |
| 10 | .align 4; \ | |
| 95707704 | 11 | .word 98b, y; \ |
| ae2c6ca6 DM |
12 | .text; \ |
| 13 | .align 4; | |
| 14 | ||
| 95707704 | 15 | #define EX_ST_FP(x,y) \ |
| a7c5724b RG |
16 | 98: x; \ |
| 17 | .section __ex_table,"a";\ | |
| 18 | .align 4; \ | |
| 95707704 | 19 | .word 98b, y##_fp; \ |
| a7c5724b RG |
20 | .text; \ |
| 21 | .align 4; | |
| 22 | ||
| ae2c6ca6 DM |
23 | #ifndef ASI_AIUS |
| 24 | #define ASI_AIUS 0x11 | |
| 25 | #endif | |
| 26 | ||
| 27 | #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS | |
| 28 | #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 | |
| 29 | #endif | |
| 30 | ||
| 31 | #define FUNC_NAME NG4copy_to_user | |
| 32 | #define STORE(type,src,addr) type##a src, [addr] %asi | |
| 33 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS | |
| 34 | #define EX_RETVAL(x) 0 | |
| 35 | ||
| 36 | #ifdef __KERNEL__ | |
| 37 | /* Writing to %asi is _expensive_ so we hardcode it. | |
| 38 | * Reading %asi to check for KERNEL_DS is comparatively | |
| 39 | * cheap. | |
| 40 | */ | |
| 41 | #define PREAMBLE \ | |
| 42 | rd %asi, %g1; \ | |
| 43 | cmp %g1, ASI_AIUS; \ | |
| 31af2f36 | 44 | bne,pn %icc, raw_copy_in_user; \ |
| ae2c6ca6 DM |
45 | nop |
| 46 | #endif | |
| 47 | ||
| 48 | #include "NG4memcpy.S" |