projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| ec723fbe PM |
2 | #ifndef __ASM_SH_ATOMIC_IRQ_H |
| 3 | #define __ASM_SH_ATOMIC_IRQ_H | |
| 4 | ||
| e839ca52 DH |
5 | #include <linux/irqflags.h> |
| 6 | ||
| ec723fbe PM |
7 | /* |
| 8 | * To get proper branch prediction for the main line, we must branch | |
| 9 | * forward to code at the end of this object's .text section, then | |
| 10 | * branch back to restart the operation. | |
| 11 | */ | |
| ec723fbe | 12 | |
| c6470150 PZ |
13 | #define ATOMIC_OP(op, c_op) \ |
| 14 | static inline void atomic_##op(int i, atomic_t *v) \ | |
| 15 | { \ | |
| 16 | unsigned long flags; \ | |
| 17 | \ | |
| 18 | raw_local_irq_save(flags); \ | |
| 19 | v->counter c_op i; \ | |
| 20 | raw_local_irq_restore(flags); \ | |
| ec723fbe PM |
21 | } |
| 22 | ||
| c6470150 PZ |
23 | #define ATOMIC_OP_RETURN(op, c_op) \ |
| 24 | static inline int atomic_##op##_return(int i, atomic_t *v) \ | |
| 25 | { \ | |
| 26 | unsigned long temp, flags; \ | |
| 27 | \ | |
| 28 | raw_local_irq_save(flags); \ | |
| 29 | temp = v->counter; \ | |
| 30 | temp c_op i; \ | |
| 31 | v->counter = temp; \ | |
| 32 | raw_local_irq_restore(flags); \ | |
| 33 | \ | |
| 34 | return temp; \ | |
| ec723fbe PM |
35 | } |
| 36 | ||
| 7d9794e7 PZ |
37 | #define ATOMIC_FETCH_OP(op, c_op) \ |
| 38 | static inline int atomic_fetch_##op(int i, atomic_t *v) \ | |
| 39 | { \ | |
| 40 | unsigned long temp, flags; \ | |
| 41 | \ | |
| 42 | raw_local_irq_save(flags); \ | |
| 43 | temp = v->counter; \ | |
| 44 | v->counter c_op i; \ | |
| 45 | raw_local_irq_restore(flags); \ | |
| 46 | \ | |
| 47 | return temp; \ | |
| 48 | } | |
| 49 | ||
| 50 | #define ATOMIC_OPS(op, c_op) \ | |
| 51 | ATOMIC_OP(op, c_op) \ | |
| 52 | ATOMIC_OP_RETURN(op, c_op) \ | |
| 53 | ATOMIC_FETCH_OP(op, c_op) | |
| ec723fbe | 54 | |
| c6470150 PZ |
55 | ATOMIC_OPS(add, +=) |
| 56 | ATOMIC_OPS(sub, -=) | |
| ec723fbe | 57 | |
| c6470150 | 58 | #undef ATOMIC_OPS |
| 7d9794e7 PZ |
59 | #define ATOMIC_OPS(op, c_op) \ |
| 60 | ATOMIC_OP(op, c_op) \ | |
| 61 | ATOMIC_FETCH_OP(op, c_op) | |
| 62 | ||
| 63 | ATOMIC_OPS(and, &=) | |
| 64 | ATOMIC_OPS(or, |=) | |
| 65 | ATOMIC_OPS(xor, ^=) | |
| 66 | ||
| 67 | #undef ATOMIC_OPS | |
| 68 | #undef ATOMIC_FETCH_OP | |
| c6470150 PZ |
69 | #undef ATOMIC_OP_RETURN |
| 70 | #undef ATOMIC_OP | |
| ec723fbe | 71 | |
| ec723fbe | 72 | #endif /* __ASM_SH_ATOMIC_IRQ_H */ |