| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* NGcopy_to_user.S: Niagara optimized copy to userspace. |
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| 3 | * |
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| 4 | * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net) |
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| 5 | */ |
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| 6 | |
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| 7 | #define EX_ST(x,y) \ |
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| 8 | 98: x; \ |
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| 9 | .section __ex_table,"a";\ |
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| 10 | .align 4; \ |
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| 11 | .word 98b, y; \ |
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| 12 | .text; \ |
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| 13 | .align 4; |
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| 14 | |
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| 15 | #ifndef ASI_AIUS |
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| 16 | #define ASI_AIUS 0x11 |
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| 17 | #endif |
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| 18 | |
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| 19 | #define FUNC_NAME NGcopy_to_user |
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| 20 | #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS |
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| 21 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS |
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| 22 | #define EX_RETVAL(x) %g0 |
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| 23 | |
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| 24 | #ifdef __KERNEL__ |
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| 25 | /* Writing to %asi is _expensive_ so we hardcode it. |
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| 26 | * Reading %asi to check for KERNEL_DS is comparatively |
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| 27 | * cheap. |
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| 28 | */ |
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| 29 | #define PREAMBLE \ |
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| 30 | rd %asi, %g1; \ |
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| 31 | cmp %g1, ASI_AIUS; \ |
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| 32 | bne,pn %icc, raw_copy_in_user; \ |
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| 33 | nop |
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| 34 | #endif |
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| 35 | |
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| 36 | #include "NGmemcpy.S" |
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| 37 | |
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