projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| c40d04df DH |
1 | #ifndef _ASM_MICROBLAZE_CMPXCHG_H |
| 2 | #define _ASM_MICROBLAZE_CMPXCHG_H | |
| 3 | ||
| 90c0d80d MS |
4 | #include <linux/irqflags.h> |
| 5 | ||
| c40d04df DH |
6 | void __bad_xchg(volatile void *ptr, int size); |
| 7 | ||
| 8 | static inline unsigned long __xchg(unsigned long x, volatile void *ptr, | |
| 9 | int size) | |
| 10 | { | |
| 11 | unsigned long ret; | |
| 12 | unsigned long flags; | |
| 13 | ||
| 14 | switch (size) { | |
| 15 | case 1: | |
| 16 | local_irq_save(flags); | |
| 17 | ret = *(volatile unsigned char *)ptr; | |
| 18 | *(volatile unsigned char *)ptr = x; | |
| 19 | local_irq_restore(flags); | |
| 20 | break; | |
| 21 | ||
| 22 | case 4: | |
| 23 | local_irq_save(flags); | |
| 24 | ret = *(volatile unsigned long *)ptr; | |
| 25 | *(volatile unsigned long *)ptr = x; | |
| 26 | local_irq_restore(flags); | |
| 27 | break; | |
| 28 | default: | |
| 29 | __bad_xchg(ptr, size), ret = 0; | |
| 30 | break; | |
| 31 | } | |
| 32 | ||
| 33 | return ret; | |
| 34 | } | |
| 35 | ||
| 36 | #define xchg(ptr, x) \ | |
| 37 | ((__typeof__(*(ptr))) __xchg((unsigned long)(x), (ptr), sizeof(*(ptr)))) | |
| 38 | ||
| 39 | #include <asm-generic/cmpxchg.h> | |
| 40 | #include <asm-generic/cmpxchg-local.h> | |
| 41 | ||
| 42 | #endif /* _ASM_MICROBLAZE_CMPXCHG_H */ |