arch/microblaze/include/asm/current.h

   1 /*
   2  * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
   3  * Copyright (C) 2008-2009 PetaLogix
   4  * Copyright (C) 2006 Atmark Techno, Inc.
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License. See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #ifndef _ASM_MICROBLAZE_CURRENT_H
  12 #define _ASM_MICROBLAZE_CURRENT_H
  13
  14 /*
  15  * Register used to hold the current task pointer while in the kernel.
  16  * Any `call clobbered' register without a special meaning should be OK,
  17  * but check asm/microblaze/kernel/entry.S to be sure.
  18  */
  19 #define CURRENT_TASK    r31
  20 # ifndef __ASSEMBLY__
  21 /*
  22  * Dedicate r31 to keeping the current task pointer
  23  */
  24 register struct task_struct *current asm("r31");
  25
  26 # define get_current()  current
  27 # endif /* __ASSEMBLY__ */
  28
  29 #endif /* _ASM_MICROBLAZE_CURRENT_H */