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- /* NGcopy_to_user.S: Niagara optimized copy to userspace.
- *
- * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
- */
- #define EX_ST(x) \
- 98: x; \
- .section .fixup; \
- .align 4; \
- 99: wr %g0, ASI_AIUS, %asi;\
- retl; \
- mov 1, %o0; \
- .section __ex_table,"a";\
- .align 4; \
- .word 98b, 99b; \
- .text; \
- .align 4;
- #ifndef ASI_AIUS
- #define ASI_AIUS 0x11
- #endif
- #define FUNC_NAME NGcopy_to_user
- #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
- #define STORE_ASI ASI_BLK_INIT_QUAD_LDD_AIUS
- #define EX_RETVAL(x) 0
- #ifdef __KERNEL__
- /* Writing to %asi is _expensive_ so we hardcode it.
- * Reading %asi to check for KERNEL_DS is comparatively
- * cheap.
- */
- #define PREAMBLE \
- rd %asi, %g1; \
- cmp %g1, ASI_AIUS; \
- bne,pn %icc, memcpy_user_stub; \
- nop
- #endif
- #include "NGmemcpy.S"
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