diff options
Diffstat (limited to 'arch/mn10300/include')
| -rw-r--r-- | arch/mn10300/include/asm/atomic.h | 33 | ||||
| -rw-r--r-- | arch/mn10300/include/asm/spinlock.h | 8 |
2 files changed, 36 insertions, 5 deletions
diff --git a/arch/mn10300/include/asm/atomic.h b/arch/mn10300/include/asm/atomic.h index ce318d5..36389ef 100644 --- a/arch/mn10300/include/asm/atomic.h +++ b/arch/mn10300/include/asm/atomic.h @@ -84,16 +84,41 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \ return retval; \ } -#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) +#define ATOMIC_FETCH_OP(op) \ +static inline int atomic_fetch_##op(int i, atomic_t *v) \ +{ \ + int retval, status; \ + \ + asm volatile( \ + "1: mov %4,(_AAR,%3) \n" \ + " mov (_ADR,%3),%1 \n" \ + " mov %1,%0 \n" \ + " " #op " %5,%0 \n" \ + " mov %0,(_ADR,%3) \n" \ + " mov (_ADR,%3),%0 \n" /* flush */ \ + " mov (_ASR,%3),%0 \n" \ + " or %0,%0 \n" \ + " bne 1b \n" \ + : "=&r"(status), "=&r"(retval), "=m"(v->counter) \ + : "a"(ATOMIC_OPS_BASE_ADDR), "r"(&v->counter), "r"(i) \ + : "memory", "cc"); \ + return retval; \ +} + +#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_OP_RETURN(op) ATOMIC_FETCH_OP(op) ATOMIC_OPS(add) ATOMIC_OPS(sub) -ATOMIC_OP(and) -ATOMIC_OP(or) -ATOMIC_OP(xor) +#undef ATOMIC_OPS +#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op) + +ATOMIC_OPS(and) +ATOMIC_OPS(or) +ATOMIC_OPS(xor) #undef ATOMIC_OPS +#undef ATOMIC_FETCH_OP #undef ATOMIC_OP_RETURN #undef ATOMIC_OP diff --git a/arch/mn10300/include/asm/spinlock.h b/arch/mn10300/include/asm/spinlock.h index 1ae580f..9c7b8f7 100644 --- a/arch/mn10300/include/asm/spinlock.h +++ b/arch/mn10300/include/asm/spinlock.h @@ -12,6 +12,8 @@ #define _ASM_SPINLOCK_H #include <linux/atomic.h> +#include <asm/barrier.h> +#include <asm/processor.h> #include <asm/rwlock.h> #include <asm/page.h> @@ -23,7 +25,11 @@ */ #define arch_spin_is_locked(x) (*(volatile signed char *)(&(x)->slock) != 0) -#define arch_spin_unlock_wait(x) do { barrier(); } while (arch_spin_is_locked(x)) + +static inline void arch_spin_unlock_wait(arch_spinlock_t *lock) +{ + smp_cond_load_acquire(&lock->slock, !VAL); +} static inline void arch_spin_unlock(arch_spinlock_t *lock) { |