arch/s390/include/asm/irqflags.h

   1 /*
   2  *    Copyright IBM Corp. 2006,2010
   3  *    Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
   4  */
   5
   6 #ifndef __ASM_IRQFLAGS_H
   7 #define __ASM_IRQFLAGS_H
   8
   9 #include <linux/types.h>
  10
  11 /* store then or system mask. */
  12 #define __raw_local_irq_stosm(__or)                                     \
  13 ({                                                                      \
  14         unsigned long __mask;                                           \
  15         asm volatile(                                                   \
  16                 "       stosm   %0,%1"                                  \
  17                 : "=Q" (__mask) : "i" (__or) : "memory");               \
  18         __mask;                                                         \
  19 })
  20
  21 /* store then and system mask. */
  22 #define __raw_local_irq_stnsm(__and)                                    \
  23 ({                                                                      \
  24         unsigned long __mask;                                           \
  25         asm volatile(                                                   \
  26                 "       stnsm   %0,%1"                                  \
  27                 : "=Q" (__mask) : "i" (__and) : "memory");              \
  28         __mask;                                                         \
  29 })
  30
  31 /* set system mask. */
  32 #define __raw_local_irq_ssm(__mask)                                     \
  33 ({                                                                      \
  34         asm volatile("ssm   %0" : : "Q" (__mask) : "memory");           \
  35 })
  36
  37 /* interrupt control.. */
  38 static inline unsigned long raw_local_irq_enable(void)
  39 {
  40         return __raw_local_irq_stosm(0x03);
  41 }
  42
  43 static inline unsigned long raw_local_irq_disable(void)
  44 {
  45         return __raw_local_irq_stnsm(0xfc);
  46 }
  47
  48 #define raw_local_save_flags(x)                                         \
  49 do {                                                                    \
  50         typecheck(unsigned long, x);                                    \
  51         (x) = __raw_local_irq_stosm(0x00);                              \
  52 } while (0)
  53
  54 static inline void raw_local_irq_restore(unsigned long flags)
  55 {
  56         __raw_local_irq_ssm(flags);
  57 }
  58
  59 static inline int raw_irqs_disabled_flags(unsigned long flags)
  60 {
  61         return !(flags & (3UL << (BITS_PER_LONG - 8)));
  62 }
  63
  64 /* For spinlocks etc */
  65 #define raw_local_irq_save(x)   ((x) = raw_local_irq_disable())
  66
  67 #endif /* __ASM_IRQFLAGS_H */