| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | /* NG4copy_to_user.S: Niagara-4 optimized copy to userspace. |
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| 3 | * |
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| 4 | * Copyright (C) 2012 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 | #define EX_ST_FP(x,y) \ |
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| 16 | 98: x; \ |
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| 17 | .section __ex_table,"a";\ |
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| 18 | .align 4; \ |
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| 19 | .word 98b, y##_fp; \ |
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| 20 | .text; \ |
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| 21 | .align 4; |
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| 22 | |
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| 23 | #ifndef ASI_AIUS |
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| 24 | #define ASI_AIUS 0x11 |
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| 25 | #endif |
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| 26 | |
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| 27 | #ifndef ASI_BLK_INIT_QUAD_LDD_AIUS |
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| 28 | #define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 |
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| 29 | #endif |
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| 30 | |
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| 31 | #define FUNC_NAME NG4copy_to_user |
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| 32 | #define STORE(type,src,addr) type##a src, [addr] %asi |
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| 33 | #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS |
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| 34 | #define EX_RETVAL(x) 0 |
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| 35 | |
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| 36 | #ifdef __KERNEL__ |
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| 37 | /* Writing to %asi is _expensive_ so we hardcode it. |
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| 38 | * Reading %asi to check for KERNEL_DS is comparatively |
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| 39 | * cheap. |
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| 40 | */ |
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| 41 | #define PREAMBLE \ |
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| 42 | rd %asi, %g1; \ |
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| 43 | cmp %g1, ASI_AIUS; \ |
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| 44 | bne,pn %icc, raw_copy_in_user; \ |
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| 45 | nop |
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| 46 | #endif |
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| 47 | |
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| 48 | #include "NG4memcpy.S" |
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| 49 | |
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