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Diffstat (limited to 'include/asm-blackfin/bitops.h')
| -rw-r--r-- | include/asm-blackfin/bitops.h | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/include/asm-blackfin/bitops.h b/include/asm-blackfin/bitops.h new file mode 100644 index 00000000000..27c2d0e48e1 --- /dev/null +++ b/include/asm-blackfin/bitops.h @@ -0,0 +1,213 @@ +#ifndef _BLACKFIN_BITOPS_H +#define _BLACKFIN_BITOPS_H + +/* + * Copyright 1992, Linus Torvalds. + */ + +#include <linux/compiler.h> +#include <asm/byteorder.h> /* swab32 */ +#include <asm/system.h> /* save_flags */ + +#ifdef __KERNEL__ + +#include <asm-generic/bitops/ffs.h> +#include <asm-generic/bitops/__ffs.h> +#include <asm-generic/bitops/sched.h> +#include <asm-generic/bitops/ffz.h> + +static __inline__ void set_bit(int nr, volatile unsigned long *addr) +{ + int *a = (int *)addr; + int mask; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + *a |= mask; + local_irq_restore(flags); +} + +static __inline__ void __set_bit(int nr, volatile unsigned long *addr) +{ + int *a = (int *)addr; + int mask; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + *a |= mask; +} + +/* + * clear_bit() doesn't provide any barrier for the compiler. + */ +#define smp_mb__before_clear_bit() barrier() +#define smp_mb__after_clear_bit() barrier() + +static __inline__ void clear_bit(int nr, volatile unsigned long *addr) +{ + int *a = (int *)addr; + int mask; + unsigned long flags; + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + *a &= ~mask; + local_irq_restore(flags); +} + +static __inline__ void __clear_bit(int nr, volatile unsigned long *addr) +{ + int *a = (int *)addr; + int mask; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + *a &= ~mask; +} + +static __inline__ void change_bit(int nr, volatile unsigned long *addr) +{ + int mask, flags; + unsigned long *ADDR = (unsigned long *)addr; + + ADDR += nr >> 5; + mask = 1 << (nr & 31); + local_irq_save(flags); + *ADDR ^= mask; + local_irq_restore(flags); +} + +static __inline__ void __change_bit(int nr, volatile unsigned long *addr) +{ + int mask; + unsigned long *ADDR = (unsigned long *)addr; + + ADDR += nr >> 5; + mask = 1 << (nr & 31); + *ADDR ^= mask; +} + +static __inline__ int test_and_set_bit(int nr, void *addr) +{ + int mask, retval; + volatile unsigned int *a = (volatile unsigned int *)addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + retval = (mask & *a) != 0; + *a |= mask; + local_irq_restore(flags); + + return retval; +} + +static __inline__ int __test_and_set_bit(int nr, volatile unsigned long *addr) +{ + int mask, retval; + volatile unsigned int *a = (volatile unsigned int *)addr; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + retval = (mask & *a) != 0; + *a |= mask; + return retval; +} + +static __inline__ int test_and_clear_bit(int nr, volatile unsigned long *addr) +{ + int mask, retval; + volatile unsigned int *a = (volatile unsigned int *)addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + retval = (mask & *a) != 0; + *a &= ~mask; + local_irq_restore(flags); + + return retval; +} + +static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long *addr) +{ + int mask, retval; + volatile unsigned int *a = (volatile unsigned int *)addr; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + retval = (mask & *a) != 0; + *a &= ~mask; + return retval; +} + +static __inline__ int test_and_change_bit(int nr, volatile unsigned long *addr) +{ + int mask, retval; + volatile unsigned int *a = (volatile unsigned int *)addr; + unsigned long flags; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + local_irq_save(flags); + retval = (mask & *a) != 0; + *a ^= mask; + local_irq_restore(flags); + return retval; +} + +static __inline__ int __test_and_change_bit(int nr, + volatile unsigned long *addr) +{ + int mask, retval; + volatile unsigned int *a = (volatile unsigned int *)addr; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + retval = (mask & *a) != 0; + *a ^= mask; + return retval; +} + +/* + * This routine doesn't need to be atomic. + */ +static __inline__ int __constant_test_bit(int nr, const void *addr) +{ + return ((1UL << (nr & 31)) & + (((const volatile unsigned int *)addr)[nr >> 5])) != 0; +} + +static __inline__ int __test_bit(int nr, const void *addr) +{ + int *a = (int *)addr; + int mask; + + a += nr >> 5; + mask = 1 << (nr & 0x1f); + return ((mask & *a) != 0); +} + +#define test_bit(nr,addr) \ +(__builtin_constant_p(nr) ? \ + __constant_test_bit((nr),(addr)) : \ + __test_bit((nr),(addr))) + +#include <asm-generic/bitops/find.h> +#include <asm-generic/bitops/hweight.h> + +#include <asm-generic/bitops/ext2-atomic.h> +#include <asm-generic/bitops/ext2-non-atomic.h> + +#include <asm-generic/bitops/minix.h> + +#endif /* __KERNEL__ */ + +#include <asm-generic/bitops/fls.h> +#include <asm-generic/bitops/fls64.h> + +#endif /* _BLACKFIN_BITOPS_H */ |