root/arch/sparc/lib/M7copy_from_user.S

   1 /*
   2  * M7copy_from_user.S: SPARC M7 optimized copy from userspace.
   3  *
   4  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   5  */
   6 
   7 
   8 #define EX_LD(x, y)                     \
   9 98:     x;                              \
  10         .section __ex_table,"a";        \
  11         .align 4;                       \
  12         .word 98b, y;                   \
  13         .text;                          \
  14         .align 4;
  15 
  16 #define EX_LD_FP(x, y)                  \
  17 98:     x;                              \
  18         .section __ex_table,"a";        \
  19         .align 4;                       \
  20         .word 98b, y##_fp;              \
  21         .text;                          \
  22         .align 4;
  23 
  24 #ifndef ASI_AIUS
  25 #define ASI_AIUS        0x11
  26 #endif
  27 
  28 #define FUNC_NAME               M7copy_from_user
  29 #define LOAD(type,addr,dest)    type##a [addr] %asi, dest
  30 #define EX_RETVAL(x)            0
  31 
  32 #ifdef __KERNEL__
  33 #define PREAMBLE                                        \
  34         rd              %asi, %g1;                      \
  35         cmp             %g1, ASI_AIUS;                  \
  36         bne,pn          %icc, raw_copy_in_user;         \
  37          nop
  38 #endif
  39 
  40 #include "M7memcpy.S"