target/linux/ubicom32/files/arch/ubicom32/include/asm/irqflags.h

   1 /*
   2  * arch/ubicom32/include/asm/irqflags.h
   3  *   Raw implementation of local IRQ functions.
   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 #ifndef _ASM_UBICOM32_IRQFLAGS_H
  29 #define _ASM_UBICOM32_IRQFLAGS_H
  30
  31 #include <linux/thread_info.h>
  32 #include <asm/ubicom32-common.h>
  33 #if defined(CONFIG_SMP)
  34 #include <asm/smp.h>
  35 #endif
  36 #include <asm/ldsr.h>
  37
  38 #if defined(CONFIG_PREEMPT)
  39 #error Not supported by Ubicom32 irq handling, yet!
  40 #endif
  41
  42 /*
  43  * raw_local_irq_enable()
  44  *      Enable interrupts for this thread.
  45  */
  46 static inline void raw_local_irq_enable(void)
  47 {
  48         ldsr_local_irq_enable();
  49 }
  50
  51 /*
  52  * raw_local_irq_disable()
  53  *      Disable interrupts for this thread.
  54  */
  55 static inline void raw_local_irq_disable(void)
  56 {
  57         ldsr_local_irq_disable();
  58 }
  59
  60 /*
  61  * raw_local_save_flags()
  62  *      Get the current IRQ state.
  63  */
  64 #define raw_local_save_flags(flags)             \
  65 do {                                            \
  66         (flags) = ldsr_local_irq_is_disabled(); \
  67 } while (0)
  68
  69 /*
  70  * raw_local_irq_save()
  71  *      Save the current interrupt state and disable interrupts.
  72  */
  73 #define raw_local_irq_save(flags)               \
  74 do {                                            \
  75         (flags) = ldsr_local_irq_save();        \
  76 } while (0)
  77
  78 /*
  79  * raw_local_irq_restore()
  80  *      Restore the IRQ state back to flags.
  81  */
  82 static inline void raw_local_irq_restore(unsigned long flags)
  83 {
  84         ldsr_local_irq_restore(flags);
  85 }
  86
  87 /*
  88  * raw_irqs_disabled_flags()
  89  *      Return true if the flags indicate that IRQ(s) are disabled.
  90  */
  91 static inline int raw_irqs_disabled_flags(unsigned long flags)
  92 {
  93         return (flags);
  94 }
  95
  96 #endif /* _ASM_UBICOM32_IRQFLAGS_H */