include/asm-sparc64/irqflags.h

   1 /*
   2  * include/asm-sparc64/irqflags.h
   3  *
   4  * IRQ flags handling
   5  *
   6  * This file gets included from lowlevel asm headers too, to provide
   7  * wrapped versions of the local_irq_*() APIs, based on the
   8  * raw_local_irq_*() functions from the lowlevel headers.
   9  */
  10 #ifndef _ASM_IRQFLAGS_H
  11 #define _ASM_IRQFLAGS_H
  12
  13 #ifndef __ASSEMBLY__
  14
  15 static inline unsigned long __raw_local_save_flags(void)
  16 {
  17         unsigned long flags;
  18
  19         __asm__ __volatile__(
  20                 "rdpr   %%pil, %0"
  21                 : "=r" (flags)
  22         );
  23
  24         return flags;
  25 }
  26
  27 #define raw_local_save_flags(flags) \
  28                 do { (flags) = __raw_local_save_flags(); } while (0)
  29
  30 static inline void raw_local_irq_restore(unsigned long flags)
  31 {
  32         __asm__ __volatile__(
  33                 "wrpr   %0, %%pil"
  34                 : /* no output */
  35                 : "r" (flags)
  36                 : "memory"
  37         );
  38 }
  39
  40 static inline void raw_local_irq_disable(void)
  41 {
  42         __asm__ __volatile__(
  43                 "wrpr   15, %%pil"
  44                 : /* no outputs */
  45                 : /* no inputs */
  46                 : "memory"
  47         );
  48 }
  49
  50 static inline void raw_local_irq_enable(void)
  51 {
  52         __asm__ __volatile__(
  53                 "wrpr   0, %%pil"
  54                 : /* no outputs */
  55                 : /* no inputs */
  56                 : "memory"
  57         );
  58 }
  59
  60 static inline int raw_irqs_disabled_flags(unsigned long flags)
  61 {
  62         return (flags > 0);
  63 }
  64
  65 static inline int raw_irqs_disabled(void)
  66 {
  67         unsigned long flags = __raw_local_save_flags();
  68
  69         return raw_irqs_disabled_flags(flags);
  70 }
  71
  72 /*
  73  * For spinlocks, etc:
  74  */
  75 static inline unsigned long __raw_local_irq_save(void)
  76 {
  77         unsigned long flags = __raw_local_save_flags();
  78
  79         raw_local_irq_disable();
  80
  81         return flags;
  82 }
  83
  84 #define raw_local_irq_save(flags) \
  85                 do { (flags) = __raw_local_irq_save(); } while (0)
  86
  87 #endif /* (__ASSEMBLY__) */
  88
  89 #endif /* !(_ASM_IRQFLAGS_H) */