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 __arch_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 __arch_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 static inline void __arch_local_irq_ssm(unsigned long flags)
  33 {
  34         asm volatile("ssm   %0" : : "Q" (flags) : "memory");
  35 }
  36
  37 static inline unsigned long arch_local_save_flags(void)
  38 {
  39         return __arch_local_irq_stosm(0x00);
  40 }
  41
  42 static inline unsigned long arch_local_irq_save(void)
  43 {
  44         return __arch_local_irq_stnsm(0xfc);
  45 }
  46
  47 static inline void arch_local_irq_disable(void)
  48 {
  49         arch_local_irq_save();
  50 }
  51
  52 static inline void arch_local_irq_enable(void)
  53 {
  54         __arch_local_irq_stosm(0x03);
  55 }
  56
  57 static inline void arch_local_irq_restore(unsigned long flags)
  58 {
  59         __arch_local_irq_ssm(flags);
  60 }
  61
  62 static inline bool arch_irqs_disabled_flags(unsigned long flags)
  63 {
  64         return !(flags & (3UL << (BITS_PER_LONG - 8)));
  65 }
  66
  67 static inline bool arch_irqs_disabled(void)
  68 {
  69         return arch_irqs_disabled_flags(arch_local_save_flags());
  70 }
  71
  72 #endif /* __ASM_IRQFLAGS_H */