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51 lines
1017 B
51 lines
1017 B
/* |
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* M7copy_to_user.S: SPARC M7 optimized copy to userspace. |
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* |
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* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
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*/ |
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#define EX_ST(x, y) \ |
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98: x; \ |
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.section __ex_table,"a"; \ |
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.align 4; \ |
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.word 98b, y; \ |
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.text; \ |
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.align 4; |
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#define EX_ST_FP(x, y) \ |
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98: x; \ |
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.section __ex_table,"a"; \ |
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.align 4; \ |
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.word 98b, y##_fp; \ |
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.text; \ |
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.align 4; |
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#ifndef ASI_AIUS |
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#define ASI_AIUS 0x11 |
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#endif |
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#ifndef ASI_BLK_INIT_QUAD_LDD_AIUS |
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#define ASI_BLK_INIT_QUAD_LDD_AIUS 0x23 |
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#endif |
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#define FUNC_NAME M7copy_to_user |
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#define STORE(type,src,addr) type##a src, [addr] %asi |
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#define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS |
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#define STORE_MRU_ASI ASI_ST_BLKINIT_MRU_S |
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#define EX_RETVAL(x) 0 |
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#ifdef __KERNEL__ |
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/* Writing to %asi is _expensive_ so we hardcode it. |
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* Reading %asi to check for KERNEL_DS is comparatively |
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* cheap. |
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*/ |
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#define PREAMBLE \ |
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rd %asi, %g1; \ |
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cmp %g1, ASI_AIUS; \ |
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bne,pn %icc, raw_copy_in_user; \ |
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nop |
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#endif |
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#include "M7memcpy.S"
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