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1 | /* NGcopy_to_user.S: Niagara optimized copy to userspace. |
2 | * | |
25e5566e | 3 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
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4 | */ |
5 | ||
6 | #define EX_ST(x) \ | |
7 | 98: x; \ | |
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8 | .section __ex_table,"a";\ |
9 | .align 4; \ | |
40bdac7d | 10 | .word 98b, __ret_one_asi;\ |
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11 | .text; \ |
12 | .align 4; | |
13 | ||
14 | #ifndef ASI_AIUS | |
15 | #define ASI_AIUS 0x11 | |
16 | #endif | |
17 | ||
18 | #define FUNC_NAME NGcopy_to_user | |
19 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS | |
20 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS | |
25e5566e | 21 | #define EX_RETVAL(x) %g0 |
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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; \ | |
aeb39876 | 31 | bne,pn %icc, ___copy_in_user; \ |
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32 | nop |
33 | #endif | |
34 | ||
0d4bc95b | 35 | #include "NGmemcpy.S" |