diff options
Diffstat (limited to 'arch/xtensa/include/asm/atomic.h')
-rw-r--r-- | arch/xtensa/include/asm/atomic.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/atomic.h b/arch/xtensa/include/asm/atomic.h new file mode 100644 index 0000000000..a75baa09e0 --- /dev/null +++ b/arch/xtensa/include/asm/atomic.h @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2016 Cadence Design Systems Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _XTENSA_ATOMIC_H +#define _XTENSA_ATOMIC_H + +#include <asm/system.h> + +typedef struct { volatile 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) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter += i; + local_irq_restore(flags); +} + +static inline void atomic_sub(int i, atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter -= i; + local_irq_restore(flags); +} + +static inline void atomic_inc(atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + ++v->counter; + local_irq_restore(flags); +} + +static inline void atomic_dec(atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + --v->counter; + local_irq_restore(flags); +} + +#endif |