include/asm-sh/atomic-irq.h

   1 #ifndef __ASM_SH_ATOMIC_IRQ_H
   2 #define __ASM_SH_ATOMIC_IRQ_H
   3
   4 /*
   5  * To get proper branch prediction for the main line, we must branch
   6  * forward to code at the end of this object's .text section, then
   7  * branch back to restart the operation.
   8  */
   9 static inline void atomic_add(int i, atomic_t *v)
  10 {
  11         unsigned long flags;
  12
  13         local_irq_save(flags);
  14         *(long *)v += i;
  15         local_irq_restore(flags);
  16 }
  17
  18 static inline void atomic_sub(int i, atomic_t *v)
  19 {
  20         unsigned long flags;
  21
  22         local_irq_save(flags);
  23         *(long *)v -= i;
  24         local_irq_restore(flags);
  25 }
  26
  27 static inline int atomic_add_return(int i, atomic_t *v)
  28 {
  29         unsigned long temp, flags;
  30
  31         local_irq_save(flags);
  32         temp = *(long *)v;
  33         temp += i;
  34         *(long *)v = temp;
  35         local_irq_restore(flags);
  36
  37         return temp;
  38 }
  39
  40 static inline int atomic_sub_return(int i, atomic_t *v)
  41 {
  42         unsigned long temp, flags;
  43
  44         local_irq_save(flags);
  45         temp = *(long *)v;
  46         temp -= i;
  47         *(long *)v = temp;
  48         local_irq_restore(flags);
  49
  50         return temp;
  51 }
  52
  53 static inline void atomic_clear_mask(unsigned int mask, atomic_t *v)
  54 {
  55         unsigned long flags;
  56
  57         local_irq_save(flags);
  58         *(long *)v &= ~mask;
  59         local_irq_restore(flags);
  60 }
  61
  62 static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
  63 {
  64         unsigned long flags;
  65
  66         local_irq_save(flags);
  67         *(long *)v |= mask;
  68         local_irq_restore(flags);
  69 }
  70
  71 #endif /* __ASM_SH_ATOMIC_IRQ_H */