TOMOYO Linux Cross Reference
Linux/arch/sparc/lib/U1copy_from_user.S

   /* SPDX-License-Identifier: GPL-2.0 */
   /* U1copy_from_user.S: UltraSparc-I/II/IIi/IIe optimized copy from userspace.
    *
    * Copyright (C) 1999, 2000, 2004 David S. Miller (davem@redhat.com)
    */
   
   #define EX_LD(x,y)              \
   98:     x;                      \
           .section __ex_table,"a";\
          .align 4;               \
          .word 98b, y;           \
          .text;                  \
          .align 4;
  
  #define EX_LD_FP(x,y)           \
  98:     x;                      \
          .section __ex_table,"a";\
          .align 4;               \
          .word 98b, y;           \
          .text;                  \
          .align 4;
  
  #define FUNC_NAME               raw_copy_from_user
  #define LOAD(type,addr,dest)    type##a [addr] %asi, dest
  #define LOAD_BLK(addr,dest)     ldda [addr] ASI_BLK_AIUS, dest
  #define EX_RETVAL(x)            0
  
          /* Writing to %asi is _expensive_ so we hardcode it.
           * Reading %asi to check for KERNEL_DS is comparatively
           * cheap.
           */
  #define PREAMBLE                                        \
          rd              %asi, %g1;                      \
          cmp             %g1, ASI_AIUS;                  \
          bne,pn          %icc, raw_copy_in_user;         \
           nop;                                           \
  
  #include "U1memcpy.S"

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