projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 6c70b6fc DM |
2 | /* GENcopy_to_user.S: Generic sparc64 copy to userspace. |
| 3 | * | |
| 4 | * Copyright (C) 2007 David S. Miller (davem@davemloft.net) | |
| 5 | */ | |
| 6 | ||
| d0796b55 | 7 | #define EX_ST(x,y) \ |
| 6c70b6fc | 8 | 98: x; \ |
| 6c70b6fc DM |
9 | .section __ex_table,"a";\ |
| 10 | .align 4; \ | |
| d0796b55 | 11 | .word 98b, y; \ |
| 6c70b6fc DM |
12 | .text; \ |
| 13 | .align 4; | |
| 14 | ||
| 15 | #ifndef ASI_AIUS | |
| 16 | #define ASI_AIUS 0x11 | |
| 17 | #endif | |
| 18 | ||
| 19 | #define FUNC_NAME GENcopy_to_user | |
| 20 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS | |
| 21 | #define EX_RETVAL(x) 0 | |
| 22 | ||
| 23 | #ifdef __KERNEL__ | |
| 24 | /* Writing to %asi is _expensive_ so we hardcode it. | |
| 25 | * Reading %asi to check for KERNEL_DS is comparatively | |
| 26 | * cheap. | |
| 27 | */ | |
| 28 | #define PREAMBLE \ | |
| 29 | rd %asi, %g1; \ | |
| 30 | cmp %g1, ASI_AIUS; \ | |
| 31af2f36 | 31 | bne,pn %icc, raw_copy_in_user; \ |
| 6c70b6fc DM |
32 | nop |
| 33 | #endif | |
| 34 | ||
| 35 | #include "GENmemcpy.S" |