arch/sparc/lib/NG2copy_from_user.S

   1 /* NG2copy_from_user.S: Niagara-2 optimized copy from userspace.
   2  *
   3  * Copyright (C) 2007 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 #ifndef ASI_BLK_AIUS_4V
  19 #define ASI_BLK_AIUS_4V 0x17
  20 #endif
  21
  22 #define FUNC_NAME               NG2copy_from_user
  23 #define LOAD(type,addr,dest)    type##a [addr] %asi, dest
  24 #define LOAD_BLK(addr,dest)     ldda [addr] ASI_BLK_AIUS_4V, dest
  25 #define EX_RETVAL(x)            0
  26
  27 #ifdef __KERNEL__
  28 #define PREAMBLE                                        \
  29         rd              %asi, %g1;                      \
  30         cmp             %g1, ASI_AIUS;                  \
  31         bne,pn          %icc, ___copy_in_user;          \
  32          nop
  33 #endif
  34
  35 #include "NG2memcpy.S"