target/linux/ubicom32/files/arch/ubicom32/include/asm/ubicom32-common-asm.h

   1 /*
   2  * arch/ubicom32/include/asm/ubicom32-common-asm.h
   3  *   Ubicom32 atomic lock operations.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28
  29 #ifndef _ASM_UBICOM32_UBICOM32_COMMON_ASM_H
  30 #define _ASM_UBICOM32_UBICOM32_COMMON_ASM_H
  31
  32 /*
  33  * atomic_lock_acquire macro
  34  *      Equivalent to __atomic_lock_acquire()
  35  */
  36 .macro atomic_lock_acquire
  37         bset scratchpad1, scratchpad1, #ATOMIC_LOCK_BIT
  38         jmpne.f .-4
  39 .endm
  40
  41 /*
  42  * atomic_lock_release macro
  43  *      Equivalent to __atomic_lock_release()
  44  */
  45 .macro atomic_lock_release
  46         bclr scratchpad1, scratchpad1, #ATOMIC_LOCK_BIT
  47 .endm
  48
  49 #endif /* _ASM_UBICOM32_UBICOM32_COMMON_ASM_H */