arch/sparc/lib/NG4copy_from_user.S

   1 /* NG4copy_from_user.S: Niagara-4 optimized copy from userspace.
   2  *
   3  * Copyright (C) 2012 David S. Miller (davem@davemloft.net)
   4  */
   5
   6 #define EX_LD(x)                \
   7 98:     x;                      \
   8         .section __ex_table,"a";\
   9         .align 4;               \
  10         .word 98b, __retl_one_asi;\
  11         .text;                  \
  12         .align 4;
  13
  14 #define EX_LD_FP(x)             \
  15 98:     x;                      \
  16         .section __ex_table,"a";\
  17         .align 4;               \
  18         .word 98b, __retl_one_asi_fp;\
  19         .text;                  \
  20         .align 4;
  21
  22 #ifndef ASI_AIUS
  23 #define ASI_AIUS        0x11
  24 #endif
  25
  26 #define FUNC_NAME               NG4copy_from_user
  27 #define LOAD(type,addr,dest)    type##a [addr] %asi, dest
  28 #define EX_RETVAL(x)            0
  29
  30 #ifdef __KERNEL__
  31 #define PREAMBLE                                        \
  32         rd              %asi, %g1;                      \
  33         cmp             %g1, ASI_AIUS;                  \
  34         bne,pn          %icc, ___copy_in_user;          \
  35          nop
  36 #endif
  37
  38 #include "NG4memcpy.S"