projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| a5401ee3 DH |
1 | #ifndef __ARCH_H8300_CMPXCHG__ |
| 2 | #define __ARCH_H8300_CMPXCHG__ | |
| 3 | ||
| 4 | #include <linux/irqflags.h> | |
| 5 | ||
| 6 | #define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) | |
| 7 | ||
| 8 | struct __xchg_dummy { unsigned long a[100]; }; | |
| 9 | #define __xg(x) ((volatile struct __xchg_dummy *)(x)) | |
| 10 | ||
| 11 | static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size) | |
| 12 | { | |
| 13 | unsigned long tmp, flags; | |
| 14 | ||
| 15 | local_irq_save(flags); | |
| 16 | ||
| 17 | switch (size) { | |
| 18 | case 1: | |
| 19 | __asm__ __volatile__ | |
| 20 | ("mov.b %2,%0\n\t" | |
| 21 | "mov.b %1,%2" | |
| 22 | : "=&r" (tmp) : "r" (x), "m" (*__xg(ptr)) : "memory"); | |
| 23 | break; | |
| 24 | case 2: | |
| 25 | __asm__ __volatile__ | |
| 26 | ("mov.w %2,%0\n\t" | |
| 27 | "mov.w %1,%2" | |
| 28 | : "=&r" (tmp) : "r" (x), "m" (*__xg(ptr)) : "memory"); | |
| 29 | break; | |
| 30 | case 4: | |
| 31 | __asm__ __volatile__ | |
| 32 | ("mov.l %2,%0\n\t" | |
| 33 | "mov.l %1,%2" | |
| 34 | : "=&r" (tmp) : "r" (x), "m" (*__xg(ptr)) : "memory"); | |
| 35 | break; | |
| 36 | default: | |
| 37 | tmp = 0; | |
| 38 | } | |
| 39 | local_irq_restore(flags); | |
| 40 | return tmp; | |
| 41 | } | |
| 42 | ||
| 43 | #include <asm-generic/cmpxchg-local.h> | |
| 44 | ||
| 45 | /* | |
| 46 | * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make | |
| 47 | * them available. | |
| 48 | */ | |
| 49 | #define cmpxchg_local(ptr, o, n) \ | |
| 50 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ | |
| 51 | (unsigned long)(n), sizeof(*(ptr)))) | |
| 52 | #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) | |
| 53 | ||
| 54 | #ifndef CONFIG_SMP | |
| 55 | #include <asm-generic/cmpxchg.h> | |
| 56 | #endif | |
| 57 | ||
| 58 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new)) | |
| 59 | ||
| 60 | #endif /* __ARCH_H8300_CMPXCHG__ */ |