U3copy_to_user.S 823 B

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  1. /* U3copy_to_user.S: UltraSparc-III optimized copy to userspace.
  2. *
  3. * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
  4. */
  5. #define EX_ST(x,y) \
  6. 98: x; \
  7. .section __ex_table,"a";\
  8. .align 4; \
  9. .word 98b, y; \
  10. .text; \
  11. .align 4;
  12. #define EX_ST_FP(x,y) \
  13. 98: x; \
  14. .section __ex_table,"a";\
  15. .align 4; \
  16. .word 98b, y##_fp; \
  17. .text; \
  18. .align 4;
  19. #define FUNC_NAME U3copy_to_user
  20. #define STORE(type,src,addr) type##a src, [addr] ASI_AIUS
  21. #define STORE_BLK(src,addr) stda src, [addr] ASI_BLK_AIUS
  22. #define EX_RETVAL(x) 0
  23. /* Writing to %asi is _expensive_ so we hardcode it.
  24. * Reading %asi to check for KERNEL_DS is comparatively
  25. * cheap.
  26. */
  27. #define PREAMBLE \
  28. rd %asi, %g1; \
  29. cmp %g1, ASI_AIUS; \
  30. bne,pn %icc, ___copy_in_user; \
  31. nop; \
  32. #include "U3memcpy.S"