diff options
author | Stefan Roese <sr@denx.de> | 2018-08-16 16:27:29 +0300 |
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committer | Daniel Schwierzeck <daniel.schwierzeck@gmail.com> | 2018-09-22 22:17:54 +0300 |
commit | 503f6f759c6b637e360f86b086557f8ca6398164 (patch) | |
tree | e75a30c34b2e259f10271a2ae4779647dbd13513 | |
parent | 46203baf665c6bab72bd5945a37d9a7e0a77699a (diff) | |
download | u-boot-503f6f759c6b637e360f86b086557f8ca6398164.tar.xz |
mips: Add arch/mips/include/asm/atomic.h
This is needed for the UBIFS support. The file is a copy of
arch/xtensa/include/asm/atomic.h
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
-rw-r--r-- | arch/mips/include/asm/atomic.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h new file mode 100644 index 0000000000..7551bf6e6c --- /dev/null +++ b/arch/mips/include/asm/atomic.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2016 Cadence Design Systems Inc. + */ + +#ifndef _MIPS_ATOMIC_H +#define _MIPS_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 |