LXR linux/arch/nios2/include/asm/irqflags.h

   1/*
   2 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License as published by
   6 * the Free Software Foundation; either version 2 of the License, or
   7 * (at your option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 *
  17 */
  18#ifndef _ASM_IRQFLAGS_H
  19#define _ASM_IRQFLAGS_H
  20
  21#include <asm/registers.h>
  22
  23static inline unsigned long arch_local_save_flags(void)
  24{
  25        return RDCTL(CTL_STATUS);
  26}
  27
  28/*
  29 * This will restore ALL status register flags, not only the interrupt
  30 * mask flag.
  31 */
  32static inline void arch_local_irq_restore(unsigned long flags)
  33{
  34        WRCTL(CTL_STATUS, flags);
  35}
  36
  37static inline void arch_local_irq_disable(void)
  38{
  39        unsigned long flags;
  40
  41        flags = arch_local_save_flags();
  42        arch_local_irq_restore(flags & ~STATUS_PIE);
  43}
  44
  45static inline void arch_local_irq_enable(void)
  46{
  47        unsigned long flags;
  48
  49        flags = arch_local_save_flags();
  50        arch_local_irq_restore(flags | STATUS_PIE);
  51}
  52
  53static inline int arch_irqs_disabled_flags(unsigned long flags)
  54{
  55        return (flags & STATUS_PIE) == 0;
  56}
  57
  58static inline int arch_irqs_disabled(void)
  59{
  60        return arch_irqs_disabled_flags(arch_local_save_flags());
  61}
  62
  63static inline unsigned long arch_local_irq_save(void)
  64{
  65        unsigned long flags;
  66
  67        flags = arch_local_save_flags();
  68        arch_local_irq_restore(flags & ~STATUS_PIE);
  69        return flags;
  70}
  71
  72#endif /* _ASM_IRQFLAGS_H */
  73