projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| ec723fbe PM |
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 */ |