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Linux/arch/sparc/lib/M7copy_from_user.S

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  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"
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