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 #ifndef ASI_AIUS
  15 #define ASI_AIUS        0x11
  16 #endif
  17
  18 #define FUNC_NAME               NG4copy_from_user
  19 #define LOAD(type,addr,dest)    type##a [addr] %asi, dest
  20 #define EX_RETVAL(x)            0
  21
  22 #ifdef __KERNEL__
  23 #define PREAMBLE                                        \
  24         rd              %asi, %g1;                      \
  25         cmp             %g1, ASI_AIUS;                  \
  26         bne,pn          %icc, ___copy_in_user;          \
  27          nop
  28 #endif
  29
  30 #include "NG4memcpy.S"