include/asm-s390/irqflags.h

   1 /*
   2  *  include/asm-s390/irqflags.h
   3  *
   4  *    Copyright (C) IBM Corp. 2006
   5  *    Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
   6  */
   7
   8 #ifndef __ASM_IRQFLAGS_H
   9 #define __ASM_IRQFLAGS_H
  10
  11 #ifdef __KERNEL__
  12
  13 /* interrupt control.. */
  14 #define raw_local_irq_enable() ({ \
  15         unsigned long  __dummy; \
  16         __asm__ __volatile__ ( \
  17                 "stosm 0(%1),0x03" \
  18                 : "=m" (__dummy) : "a" (&__dummy) : "memory" ); \
  19         })
  20
  21 #define raw_local_irq_disable() ({ \
  22         unsigned long __flags; \
  23         __asm__ __volatile__ ( \
  24                 "stnsm 0(%1),0xfc" : "=m" (__flags) : "a" (&__flags) ); \
  25         __flags; \
  26         })
  27
  28 #define raw_local_save_flags(x)                                                 \
  29 do {                                                                            \
  30         typecheck(unsigned long, x);                                            \
  31         __asm__ __volatile__("stosm 0(%1),0" : "=m" (x) : "a" (&x), "m" (x) );  \
  32 } while (0)
  33
  34 #define raw_local_irq_restore(x)                                                \
  35 do {                                                                            \
  36         typecheck(unsigned long, x);                                            \
  37         __asm__ __volatile__("ssm   0(%0)" : : "a" (&x), "m" (x) : "memory");   \
  38 } while (0)
  39
  40 #define raw_irqs_disabled()             \
  41 ({                                      \
  42         unsigned long flags;            \
  43         raw_local_save_flags(flags);    \
  44         !((flags >> __FLAG_SHIFT) & 3); \
  45 })
  46
  47 static inline int raw_irqs_disabled_flags(unsigned long flags)
  48 {
  49         return !((flags >> __FLAG_SHIFT) & 3);
  50 }
  51
  52 /* For spinlocks etc */
  53 #define raw_local_irq_save(x)   ((x) = raw_local_irq_disable())
  54
  55 #endif /* __KERNEL__ */
  56 #endif /* __ASM_IRQFLAGS_H */