projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 398d1083 DM |
1 | /* NGcopy_to_user.S: Niagara optimized copy to userspace. |
| 2 | * | |
| 25e5566e | 3 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
| 398d1083 DM |
4 | */ |
| 5 | ||
| 6 | #define EX_ST(x) \ | |
| 7 | 98: x; \ | |
| 8 | .section .fixup; \ | |
| 9 | .align 4; \ | |
| 10 | 99: wr %g0, ASI_AIUS, %asi;\ | |
| 25e5566e DM |
11 | ret; \ |
| 12 | restore %g0, 1, %o0; \ | |
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13 | .section __ex_table,"a";\ |
| 14 | .align 4; \ | |
| 15 | .word 98b, 99b; \ | |
| 16 | .text; \ | |
| 17 | .align 4; | |
| 18 | ||
| 19 | #ifndef ASI_AIUS | |
| 20 | #define ASI_AIUS 0x11 | |
| 21 | #endif | |
| 22 | ||
| 23 | #define FUNC_NAME NGcopy_to_user | |
| 24 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS | |
| 25 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS | |
| 25e5566e | 26 | #define EX_RETVAL(x) %g0 |
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27 | |
| 28 | #ifdef __KERNEL__ | |
| 29 | /* Writing to %asi is _expensive_ so we hardcode it. | |
| 30 | * Reading %asi to check for KERNEL_DS is comparatively | |
| 31 | * cheap. | |
| 32 | */ | |
| 33 | #define PREAMBLE \ | |
| 34 | rd %asi, %g1; \ | |
| 35 | cmp %g1, ASI_AIUS; \ | |
| 36 | bne,pn %icc, memcpy_user_stub; \ | |
| 37 | nop | |
| 38 | #endif | |
| 39 | ||
| 0d4bc95b | 40 | #include "NGmemcpy.S" |