1 #ifndef __ASM_SH_BITOPS_H
2 #define __ASM_SH_BITOPS_H
4 #include <asm-generic/bitops/fls.h>
5 #include <asm-generic/bitops/__fls.h>
6 #include <asm-generic/bitops/fls64.h>
7 #include <asm-generic/bitops/__ffs.h>
10 #include <asm/irqflags.h>
12 #include <asm/byteorder.h>
14 static inline void set_bit(int nr, volatile void * addr)
17 volatile unsigned int *a = addr;
21 mask = 1 << (nr & 0x1f);
22 local_irq_save(flags);
24 local_irq_restore(flags);
28 * clear_bit() doesn't provide any barrier for the compiler.
30 #define smp_mb__before_clear_bit() barrier()
31 #define smp_mb__after_clear_bit() barrier()
32 static inline void clear_bit(int nr, volatile void * addr)
35 volatile unsigned int *a = addr;
39 mask = 1 << (nr & 0x1f);
40 local_irq_save(flags);
42 local_irq_restore(flags);
45 static inline void change_bit(int nr, volatile void * addr)
48 volatile unsigned int *a = addr;
52 mask = 1 << (nr & 0x1f);
53 local_irq_save(flags);
55 local_irq_restore(flags);
58 static inline int test_and_set_bit(int nr, volatile void * addr)
61 volatile unsigned int *a = addr;
65 mask = 1 << (nr & 0x1f);
66 local_irq_save(flags);
67 retval = (mask & *a) != 0;
69 local_irq_restore(flags);
74 static inline int test_and_clear_bit(int nr, volatile void * addr)
77 volatile unsigned int *a = addr;
81 mask = 1 << (nr & 0x1f);
82 local_irq_save(flags);
83 retval = (mask & *a) != 0;
85 local_irq_restore(flags);
90 static inline int test_and_change_bit(int nr, volatile void * addr)
93 volatile unsigned int *a = addr;
97 mask = 1 << (nr & 0x1f);
98 local_irq_save(flags);
99 retval = (mask & *a) != 0;
101 local_irq_restore(flags);
106 static inline unsigned long ffz(unsigned long word)
108 unsigned long result;
114 : "=r" (result), "=r" (word)
115 : "0" (~0L), "1" (word)
121 * ffs - find first bit in word.
122 * @word: The word to search
124 * Undefined if no bit exists, so code should check against 0 first.
126 static inline int ffs (int x)
156 #endif /* __KERNEL__ */
158 #endif /* __ASM_SH_BITOPS_H */