some of the u-boot frameworks like ubi-fs and eth_gadget uses atomic_* api's. So add atomic api's for mips.

This makes ubi-fs on nand work with mips platform.

Signed-off-by: Govindraj Raja Govindraj.Raja@imgtec.com --- arch/mips/include/asm/atomic.h | 90 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 90 insertions(+) create mode 100644 arch/mips/include/asm/atomic.h

diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h new file mode 100644 index 0000000..163e7e2 --- /dev/null +++ b/arch/mips/include/asm/atomic.h @@ -0,0 +1,90 @@ +/* + * Based on: linux/arch/mips/include/asm/atomic.h + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __ASM_MIPS_ATOMIC_H +#define __ASM_MIPS_ATOMIC_H + +typedef struct { volatile int counter; } atomic_t; + +#define ATOMIC_INIT(i) { (i) } + +#include <asm/system.h> + +#define atomic_read(v) ((v)->counter) +#define atomic_set(v, i) (((v)->counter) = (i)) + +static inline void atomic_add(int i, volatile atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter += i; + local_irq_restore(flags); +} + +static inline void atomic_sub(int i, volatile atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter -= i; + local_irq_restore(flags); +} + +static inline void atomic_inc(volatile atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter += 1; + local_irq_restore(flags); +} + +static inline void atomic_dec(volatile atomic_t *v) +{ + unsigned long flags; + + local_irq_save(flags); + v->counter -= 1; + local_irq_restore(flags); +} + +static inline int atomic_dec_and_test(volatile atomic_t *v) +{ + unsigned long flags; + int val; + + local_irq_save(flags); + val = v->counter; + v->counter = val -= 1; + local_irq_restore(flags); + + return val == 0; +} + +static inline int atomic_add_negative(int i, volatile atomic_t *v) +{ + unsigned long flags; + int val; + + local_irq_save(flags); + val = v->counter; + v->counter = val += i; + local_irq_restore(flags); + + return val < 0; +} + +static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) +{ + unsigned long flags; + + local_irq_save(flags); + *addr &= ~mask; + local_irq_restore(flags); +} + +#endif /* __ASM_MIPS_ATOMIC_H */