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 | ||
| e839ca52 DH |
4 | #include <linux/irqflags.h> |
| 5 | ||
| ec723fbe PM |
6 | /* |
| 7 | * To get proper branch prediction for the main line, we must branch | |
| 8 | * forward to code at the end of this object's .text section, then | |
| 9 | * branch back to restart the operation. | |
| 10 | */ | |
| ec723fbe | 11 | |
| c6470150 PZ |
12 | #define ATOMIC_OP(op, c_op) \ |
| 13 | static inline void atomic_##op(int i, atomic_t *v) \ | |
| 14 | { \ | |
| 15 | unsigned long flags; \ | |
| 16 | \ | |
| 17 | raw_local_irq_save(flags); \ | |
| 18 | v->counter c_op i; \ | |
| 19 | raw_local_irq_restore(flags); \ | |
| ec723fbe PM |
20 | } |
| 21 | ||
| c6470150 PZ |
22 | #define ATOMIC_OP_RETURN(op, c_op) \ |
| 23 | static inline int atomic_##op##_return(int i, atomic_t *v) \ | |
| 24 | { \ | |
| 25 | unsigned long temp, flags; \ | |
| 26 | \ | |
| 27 | raw_local_irq_save(flags); \ | |
| 28 | temp = v->counter; \ | |
| 29 | temp c_op i; \ | |
| 30 | v->counter = temp; \ | |
| 31 | raw_local_irq_restore(flags); \ | |
| 32 | \ | |
| 33 | return temp; \ | |
| ec723fbe PM |
34 | } |
| 35 | ||
| 7d9794e7 PZ |
36 | #define ATOMIC_FETCH_OP(op, c_op) \ |
| 37 | static inline int atomic_fetch_##op(int i, atomic_t *v) \ | |
| 38 | { \ | |
| 39 | unsigned long temp, flags; \ | |
| 40 | \ | |
| 41 | raw_local_irq_save(flags); \ | |
| 42 | temp = v->counter; \ | |
| 43 | v->counter c_op i; \ | |
| 44 | raw_local_irq_restore(flags); \ | |
| 45 | \ | |
| 46 | return temp; \ | |
| 47 | } | |
| 48 | ||
| 49 | #define ATOMIC_OPS(op, c_op) \ | |
| 50 | ATOMIC_OP(op, c_op) \ | |
| 51 | ATOMIC_OP_RETURN(op, c_op) \ | |
| 52 | ATOMIC_FETCH_OP(op, c_op) | |
| ec723fbe | 53 | |
| c6470150 PZ |
54 | ATOMIC_OPS(add, +=) |
| 55 | ATOMIC_OPS(sub, -=) | |
| ec723fbe | 56 | |
| c6470150 | 57 | #undef ATOMIC_OPS |
| 7d9794e7 PZ |
58 | #define ATOMIC_OPS(op, c_op) \ |
| 59 | ATOMIC_OP(op, c_op) \ | |
| 60 | ATOMIC_FETCH_OP(op, c_op) | |
| 61 | ||
| 62 | ATOMIC_OPS(and, &=) | |
| 63 | ATOMIC_OPS(or, |=) | |
| 64 | ATOMIC_OPS(xor, ^=) | |
| 65 | ||
| 66 | #undef ATOMIC_OPS | |
| 67 | #undef ATOMIC_FETCH_OP | |
| c6470150 PZ |
68 | #undef ATOMIC_OP_RETURN |
| 69 | #undef ATOMIC_OP | |
| ec723fbe | 70 | |
| ec723fbe | 71 | #endif /* __ASM_SH_ATOMIC_IRQ_H */ |