diff options
Diffstat (limited to 'include/asm-m68k/atomic.h')
| -rw-r--r-- | include/asm-m68k/atomic.h | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/include/asm-m68k/atomic.h b/include/asm-m68k/atomic.h deleted file mode 100644 index 38f3043e7fe..00000000000 --- a/include/asm-m68k/atomic.h +++ /dev/null @@ -1,148 +0,0 @@ -#ifndef __ARCH_M68K_ATOMIC__ -#define __ARCH_M68K_ATOMIC__ - -#include <linux/config.h> - -#include <asm/system.h> /* local_irq_XXX() */ - -/* - * Atomic operations that C can't guarantee us. Useful for - * resource counting etc.. - */ - -/* - * We do not have SMP m68k systems, so we don't have to deal with that. - */ - -typedef struct { int counter; } atomic_t; -#define ATOMIC_INIT(i) { (i) } - -#define atomic_read(v) ((v)->counter) -#define atomic_set(v, i) (((v)->counter) = i) - -static inline void atomic_add(int i, atomic_t *v) -{ - __asm__ __volatile__("addl %1,%0" : "+m" (*v) : "id" (i)); -} - -static inline void atomic_sub(int i, atomic_t *v) -{ - __asm__ __volatile__("subl %1,%0" : "+m" (*v) : "id" (i)); -} - -static inline void atomic_inc(atomic_t *v) -{ - __asm__ __volatile__("addql #1,%0" : "+m" (*v)); -} - -static inline void atomic_dec(atomic_t *v) -{ - __asm__ __volatile__("subql #1,%0" : "+m" (*v)); -} - -static inline int atomic_dec_and_test(atomic_t *v) -{ - char c; - __asm__ __volatile__("subql #1,%1; seq %0" : "=d" (c), "+m" (*v)); - return c != 0; -} - -static inline int atomic_inc_and_test(atomic_t *v) -{ - char c; - __asm__ __volatile__("addql #1,%1; seq %0" : "=d" (c), "+m" (*v)); - return c != 0; -} - -#ifdef CONFIG_RMW_INSNS -static inline int atomic_add_return(int i, atomic_t *v) -{ - int t, tmp; - - __asm__ __volatile__( - "1: movel %2,%1\n" - " addl %3,%1\n" - " casl %2,%1,%0\n" - " jne 1b" - : "+m" (*v), "=&d" (t), "=&d" (tmp) - : "g" (i), "2" (atomic_read(v))); - return t; -} - -static inline int atomic_sub_return(int i, atomic_t *v) -{ - int t, tmp; - - __asm__ __volatile__( - "1: movel %2,%1\n" - " subl %3,%1\n" - " casl %2,%1,%0\n" - " jne 1b" - : "+m" (*v), "=&d" (t), "=&d" (tmp) - : "g" (i), "2" (atomic_read(v))); - return t; -} -#else /* !CONFIG_RMW_INSNS */ -static inline int atomic_add_return(int i, atomic_t * v) -{ - unsigned long flags; - int t; - - local_irq_save(flags); - t = atomic_read(v); - t += i; - atomic_set(v, t); - local_irq_restore(flags); - - return t; -} - -static inline int atomic_sub_return(int i, atomic_t * v) -{ - unsigned long flags; - int t; - - local_irq_save(flags); - t = atomic_read(v); - t -= i; - atomic_set(v, t); - local_irq_restore(flags); - - return t; -} -#endif /* !CONFIG_RMW_INSNS */ - -#define atomic_dec_return(v) atomic_sub_return(1, (v)) -#define atomic_inc_return(v) atomic_add_return(1, (v)) - -static inline int atomic_sub_and_test(int i, atomic_t *v) -{ - char c; - __asm__ __volatile__("subl %2,%1; seq %0" : "=d" (c), "+m" (*v): "g" (i)); - return c != 0; -} - -static inline int atomic_add_negative(int i, atomic_t *v) -{ - char c; - __asm__ __volatile__("addl %2,%1; smi %0" : "=d" (c), "+m" (*v): "g" (i)); - return c != 0; -} - -static inline void atomic_clear_mask(unsigned long mask, unsigned long *v) -{ - __asm__ __volatile__("andl %1,%0" : "+m" (*v) : "id" (~(mask))); -} - -static inline void atomic_set_mask(unsigned long mask, unsigned long *v) -{ - __asm__ __volatile__("orl %1,%0" : "+m" (*v) : "id" (mask)); -} - -/* Atomic operations are already serializing */ -#define smp_mb__before_atomic_dec() barrier() -#define smp_mb__after_atomic_dec() barrier() -#define smp_mb__before_atomic_inc() barrier() -#define smp_mb__after_atomic_inc() barrier() - -#endif /* __ARCH_M68K_ATOMIC __ */ |
