include/asm-mips/current.h

   1 /* $Id: current.h,v 1.5 1999/07/26 19:42:43 harald Exp $
   2  *
   3  * This file is subject to the terms and conditions of the GNU General Public
   4  * License.  See the file "COPYING" in the main directory of this archive
   5  * for more details.
   6  *
   7  * Copyright (C) 1998 Ralf Baechle
   8  * Copyright (C) 1999 Silicon Graphics, Inc.
   9  */
  10 #ifndef _ASM_CURRENT_H
  11 #define _ASM_CURRENT_H
  12
  13 #ifdef _LANGUAGE_C
  14
  15 /* MIPS rules... */
  16 register struct task_struct *current asm("$28");
  17
  18 #endif /* _LANGUAGE_C */
  19 #ifdef _LANGUAGE_ASSEMBLY
  20
  21 /*
  22  * Special variant for use by exception handlers when the stack pointer
  23  * is not loaded.
  24  */
  25 #define _GET_CURRENT(reg)                       \
  26         lui     reg, %hi(kernelsp);             \
  27         .set    push;                           \
  28         .set    reorder;                        \
  29         lw      reg, %lo(kernelsp)(reg);        \
  30         .set    pop;                            \
  31         ori     reg, 8191;                      \
  32         xori    reg, 8191
  33
  34 #endif
  35
  36 #endif /* _ASM_CURRENT_H */