projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| cf5adce1 DM |
2 | /* NG2copy_to_user.S: Niagara-2 optimized copy to userspace. |
| 3 | * | |
| 4 | * Copyright (C) 2007 David S. Miller (davem@davemloft.net) | |
| 5 | */ | |
| 6 | ||
| e93704e4 | 7 | #define EX_ST(x,y) \ |
| cf5adce1 | 8 | 98: x; \ |
| cf5adce1 DM |
9 | .section __ex_table,"a";\ |
| 10 | .align 4; \ | |
| e93704e4 | 11 | .word 98b, y; \ |
| cf5adce1 DM |
12 | .text; \ |
| 13 | .align 4; | |
| 14 | ||
| e93704e4 | 15 | #define EX_ST_FP(x,y) \ |
| a7c5724b RG |
16 | 98: x; \ |
| 17 | .section __ex_table,"a";\ | |
| 18 | .align 4; \ | |
| e93704e4 | 19 | .word 98b, y##_fp; \ |
| a7c5724b RG |
20 | .text; \ |
| 21 | .align 4; | |
| 22 | ||
| cf5adce1 DM |
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; \ | |
| 31af2f36 | 49 | bne,pn %icc, raw_copy_in_user; \ |
| cf5adce1 DM |
50 | nop |
| 51 | #endif | |
| 52 | ||
| 53 | #include "NG2memcpy.S" |