arch/xtensa/include/asm/irqflags.h

   1 /*
   2  * Xtensa IRQ flags handling functions
   3  *
   4  * This file is subject to the terms and conditions of the GNU General Public
   5  * License.  See the file "COPYING" in the main directory of this archive
   6  * for more details.
   7  *
   8  * Copyright (C) 2001 - 2005 Tensilica Inc.
   9  */
  10
  11 #ifndef _XTENSA_IRQFLAGS_H
  12 #define _XTENSA_IRQFLAGS_H
  13
  14 #include <linux/types.h>
  15 #include <asm/processor.h>
  16
  17 static inline unsigned long arch_local_save_flags(void)
  18 {
  19         unsigned long flags;
  20         asm volatile("rsr %0,"__stringify(PS) : "=a" (flags));
  21         return flags;
  22 }
  23
  24 static inline unsigned long arch_local_irq_save(void)
  25 {
  26         unsigned long flags;
  27         asm volatile("rsil %0, "__stringify(LOCKLEVEL)
  28                      : "=a" (flags) :: "memory");
  29         return flags;
  30 }
  31
  32 static inline void arch_local_irq_disable(void)
  33 {
  34         arch_local_irq_save();
  35 }
  36
  37 static inline void arch_local_irq_enable(void)
  38 {
  39         unsigned long flags;
  40         asm volatile("rsil %0, 0" : "=a" (flags) :: "memory");
  41 }
  42
  43 static inline void arch_local_irq_restore(unsigned long flags)
  44 {
  45         asm volatile("wsr %0, "__stringify(PS)" ; rsync"
  46                      :: "a" (flags) : "memory");
  47 }
  48
  49 static inline bool arch_irqs_disabled_flags(unsigned long flags)
  50 {
  51         return (flags & 0xf) != 0;
  52 }
  53
  54 static inline bool arch_irqs_disabled(void)
  55 {
  56         return arch_irqs_disabled_flags(arch_local_save_flags());
  57 }
  58
  59 #endif /* _XTENSA_IRQFLAGS_H */