arch/sparc64/lib/NGcopy_from_user.S

   1 /* NGcopy_from_user.S: Niagara optimized copy from userspace.
   2  *
   3  * Copyright (C) 2006, 2007 David S. Miller (davem@davemloft.net)
   4  */
   5
   6 #define EX_LD(x)                \
   7 98:     x;                      \
   8         .section .fixup;        \
   9         .align 4;               \
  10 99:     wr      %g0, ASI_AIUS, %asi;\
  11         ret;                    \
  12          restore %g0, 1, %o0;   \
  13         .section __ex_table,"a";\
  14         .align 4;               \
  15         .word 98b, 99b;         \
  16         .text;                  \
  17         .align 4;
  18
  19 #ifndef ASI_AIUS
  20 #define ASI_AIUS        0x11
  21 #endif
  22
  23 #define FUNC_NAME               NGcopy_from_user
  24 #define LOAD(type,addr,dest)    type##a [addr] ASI_AIUS, dest
  25 #define LOAD_TWIN(addr_reg,dest0,dest1) \
  26         ldda [addr_reg] ASI_BLK_INIT_QUAD_LDD_AIUS, dest0
  27 #define EX_RETVAL(x)            %g0
  28
  29 #ifdef __KERNEL__
  30 #define PREAMBLE                                        \
  31         rd              %asi, %g1;                      \
  32         cmp             %g1, ASI_AIUS;                  \
  33         bne,pn          %icc, memcpy_user_stub;         \
  34          nop
  35 #endif
  36
  37 #include "NGmemcpy.S"