1 #ifndef _BLACKFIN_BITOPS_H
2 #define _BLACKFIN_BITOPS_H
5 * Copyright 1992, Linus Torvalds.
8 #include <linux/compiler.h>
9 #include <asm/byteorder.h> /* swab32 */
10 #include <asm/system.h> /* save_flags */
14 #ifndef _LINUX_BITOPS_H
15 #error only <linux/bitops.h> can be included directly
18 #include <asm-generic/bitops/ffs.h>
19 #include <asm-generic/bitops/__ffs.h>
20 #include <asm-generic/bitops/sched.h>
21 #include <asm-generic/bitops/ffz.h>
23 static __inline__ void set_bit(int nr, volatile unsigned long *addr)
30 mask = 1 << (nr & 0x1f);
31 local_irq_save(flags);
33 local_irq_restore(flags);
36 static __inline__ void __set_bit(int nr, volatile unsigned long *addr)
42 mask = 1 << (nr & 0x1f);
47 * clear_bit() doesn't provide any barrier for the compiler.
49 #define smp_mb__before_clear_bit() barrier()
50 #define smp_mb__after_clear_bit() barrier()
52 static __inline__ void clear_bit(int nr, volatile unsigned long *addr)
58 mask = 1 << (nr & 0x1f);
59 local_irq_save(flags);
61 local_irq_restore(flags);
64 static __inline__ void __clear_bit(int nr, volatile unsigned long *addr)
70 mask = 1 << (nr & 0x1f);
74 static __inline__ void change_bit(int nr, volatile unsigned long *addr)
77 unsigned long *ADDR = (unsigned long *)addr;
80 mask = 1 << (nr & 31);
81 local_irq_save(flags);
83 local_irq_restore(flags);
86 static __inline__ void __change_bit(int nr, volatile unsigned long *addr)
89 unsigned long *ADDR = (unsigned long *)addr;
92 mask = 1 << (nr & 31);
96 static __inline__ int test_and_set_bit(int nr, void *addr)
99 volatile unsigned int *a = (volatile unsigned int *)addr;
103 mask = 1 << (nr & 0x1f);
104 local_irq_save(flags);
105 retval = (mask & *a) != 0;
107 local_irq_restore(flags);
112 static __inline__ int __test_and_set_bit(int nr, volatile unsigned long *addr)
115 volatile unsigned int *a = (volatile unsigned int *)addr;
118 mask = 1 << (nr & 0x1f);
119 retval = (mask & *a) != 0;
124 static __inline__ int test_and_clear_bit(int nr, volatile unsigned long *addr)
127 volatile unsigned int *a = (volatile unsigned int *)addr;
131 mask = 1 << (nr & 0x1f);
132 local_irq_save(flags);
133 retval = (mask & *a) != 0;
135 local_irq_restore(flags);
140 static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long *addr)
143 volatile unsigned int *a = (volatile unsigned int *)addr;
146 mask = 1 << (nr & 0x1f);
147 retval = (mask & *a) != 0;
152 static __inline__ int test_and_change_bit(int nr, volatile unsigned long *addr)
155 volatile unsigned int *a = (volatile unsigned int *)addr;
159 mask = 1 << (nr & 0x1f);
160 local_irq_save(flags);
161 retval = (mask & *a) != 0;
163 local_irq_restore(flags);
167 static __inline__ int __test_and_change_bit(int nr,
168 volatile unsigned long *addr)
171 volatile unsigned int *a = (volatile unsigned int *)addr;
174 mask = 1 << (nr & 0x1f);
175 retval = (mask & *a) != 0;
181 * This routine doesn't need to be atomic.
183 static __inline__ int __constant_test_bit(int nr, const void *addr)
185 return ((1UL << (nr & 31)) &
186 (((const volatile unsigned int *)addr)[nr >> 5])) != 0;
189 static __inline__ int __test_bit(int nr, const void *addr)
191 int *a = (int *)addr;
195 mask = 1 << (nr & 0x1f);
196 return ((mask & *a) != 0);
199 #define test_bit(nr,addr) \
200 (__builtin_constant_p(nr) ? \
201 __constant_test_bit((nr),(addr)) : \
202 __test_bit((nr),(addr)))
204 #include <asm-generic/bitops/find.h>
205 #include <asm-generic/bitops/hweight.h>
206 #include <asm-generic/bitops/lock.h>
208 #include <asm-generic/bitops/ext2-atomic.h>
209 #include <asm-generic/bitops/ext2-non-atomic.h>
211 #include <asm-generic/bitops/minix.h>
213 #endif /* __KERNEL__ */
215 #include <asm-generic/bitops/fls.h>
216 #include <asm-generic/bitops/fls64.h>
218 #endif /* _BLACKFIN_BITOPS_H */