diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/m68k/include/asm/cmpxchg.h')
-rw-r--r-- | ANDROID_3.4.5/arch/m68k/include/asm/cmpxchg.h | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/ANDROID_3.4.5/arch/m68k/include/asm/cmpxchg.h b/ANDROID_3.4.5/arch/m68k/include/asm/cmpxchg.h deleted file mode 100644 index 5c81d0ea..00000000 --- a/ANDROID_3.4.5/arch/m68k/include/asm/cmpxchg.h +++ /dev/null @@ -1,141 +0,0 @@ -#ifndef __ARCH_M68K_CMPXCHG__ -#define __ARCH_M68K_CMPXCHG__ - -#include <linux/irqflags.h> - -struct __xchg_dummy { unsigned long a[100]; }; -#define __xg(x) ((volatile struct __xchg_dummy *)(x)) - -extern unsigned long __invalid_xchg_size(unsigned long, volatile void *, int); - -#ifndef CONFIG_RMW_INSNS -static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size) -{ - unsigned long flags, tmp; - - local_irq_save(flags); - - switch (size) { - case 1: - tmp = *(u8 *)ptr; - *(u8 *)ptr = x; - x = tmp; - break; - case 2: - tmp = *(u16 *)ptr; - *(u16 *)ptr = x; - x = tmp; - break; - case 4: - tmp = *(u32 *)ptr; - *(u32 *)ptr = x; - x = tmp; - break; - default: - tmp = __invalid_xchg_size(x, ptr, size); - break; - } - - local_irq_restore(flags); - return x; -} -#else -static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size) -{ - switch (size) { - case 1: - __asm__ __volatile__ - ("moveb %2,%0\n\t" - "1:\n\t" - "casb %0,%1,%2\n\t" - "jne 1b" - : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory"); - break; - case 2: - __asm__ __volatile__ - ("movew %2,%0\n\t" - "1:\n\t" - "casw %0,%1,%2\n\t" - "jne 1b" - : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory"); - break; - case 4: - __asm__ __volatile__ - ("movel %2,%0\n\t" - "1:\n\t" - "casl %0,%1,%2\n\t" - "jne 1b" - : "=&d" (x) : "d" (x), "m" (*__xg(ptr)) : "memory"); - break; - default: - x = __invalid_xchg_size(x, ptr, size); - break; - } - return x; -} -#endif - -#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) - -#include <asm-generic/cmpxchg-local.h> - -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) - -extern unsigned long __invalid_cmpxchg_size(volatile void *, - unsigned long, unsigned long, int); - -/* - * Atomic compare and exchange. Compare OLD with MEM, if identical, - * store NEW in MEM. Return the initial value in MEM. Success is - * indicated by comparing RETURN with OLD. - */ -#ifdef CONFIG_RMW_INSNS -#define __HAVE_ARCH_CMPXCHG 1 - -static inline unsigned long __cmpxchg(volatile void *p, unsigned long old, - unsigned long new, int size) -{ - switch (size) { - case 1: - __asm__ __volatile__ ("casb %0,%2,%1" - : "=d" (old), "=m" (*(char *)p) - : "d" (new), "0" (old), "m" (*(char *)p)); - break; - case 2: - __asm__ __volatile__ ("casw %0,%2,%1" - : "=d" (old), "=m" (*(short *)p) - : "d" (new), "0" (old), "m" (*(short *)p)); - break; - case 4: - __asm__ __volatile__ ("casl %0,%2,%1" - : "=d" (old), "=m" (*(int *)p) - : "d" (new), "0" (old), "m" (*(int *)p)); - break; - default: - old = __invalid_cmpxchg_size(p, old, new, size); - break; - } - return old; -} - -#define cmpxchg(ptr, o, n) \ - ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \ - (unsigned long)(n), sizeof(*(ptr)))) -#define cmpxchg_local(ptr, o, n) \ - ((__typeof__(*(ptr)))__cmpxchg((ptr), (unsigned long)(o), \ - (unsigned long)(n), sizeof(*(ptr)))) -#else - -/* - * cmpxchg_local and cmpxchg64_local are atomic wrt current CPU. Always make - * them available. - */ -#define cmpxchg_local(ptr, o, n) \ - ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ - (unsigned long)(n), sizeof(*(ptr)))) - -#include <asm-generic/cmpxchg.h> - -#endif - -#endif /* __ARCH_M68K_CMPXCHG__ */ |