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33 lines
766 B
33 lines
766 B
/* U3copy_to_user.S: UltraSparc-III optimized copy to userspace.
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*
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* Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
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*/
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#define EX_ST(x) \
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98: x; \
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.section .fixup; \
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.align 4; \
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99: retl; \
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mov 1, %o0; \
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.section __ex_table,"a";\
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.align 4; \
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.word 98b, 99b; \
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.text; \
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.align 4;
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#define FUNC_NAME U3copy_to_user
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#define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
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#define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
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#define EX_RETVAL(x) 0
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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, memcpy_user_stub; \
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nop; \
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#include "U3memcpy.S"
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