projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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2 | /* NGcopy_to_user.S: Niagara optimized copy to userspace. |
| 3 | * | |
| 25e5566e | 4 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
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5 | */ |
| 6 | ||
| 7ae3aaf5 | 7 | #define EX_ST(x,y) \ |
| 398d1083 | 8 | 98: x; \ |
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9 | .section __ex_table,"a";\ |
| 10 | .align 4; \ | |
| 7ae3aaf5 | 11 | .word 98b, y; \ |
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12 | .text; \ |
| 13 | .align 4; | |
| 14 | ||
| 15 | #ifndef ASI_AIUS | |
| 16 | #define ASI_AIUS 0x11 | |
| 17 | #endif | |
| 18 | ||
| 19 | #define FUNC_NAME NGcopy_to_user | |
| 20 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS | |
| 21 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS | |
| 25e5566e | 22 | #define EX_RETVAL(x) %g0 |
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23 | |
| 24 | #ifdef __KERNEL__ | |
| 25 | /* Writing to %asi is _expensive_ so we hardcode it. | |
| 26 | * Reading %asi to check for KERNEL_DS is comparatively | |
| 27 | * cheap. | |
| 28 | */ | |
| 29 | #define PREAMBLE \ | |
| 30 | rd %asi, %g1; \ | |
| 31 | cmp %g1, ASI_AIUS; \ | |
| 31af2f36 | 32 | bne,pn %icc, raw_copy_in_user; \ |
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33 | nop |
| 34 | #endif | |
| 35 | ||
| 0d4bc95b | 36 | #include "NGmemcpy.S" |