| Paul Mundt | ec723fbe | 2006-12-07 20:33:38 +0900 | [diff] [blame] | 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 */ |