1 #ifndef _M68KNOMMU_BITOPS_H
2 #define _M68KNOMMU_BITOPS_H
5 * Copyright 1992, Linus Torvalds.
8 #include <linux/compiler.h>
9 #include <asm/byteorder.h> /* swab32 */
13 #include <asm-generic/bitops/ffs.h>
14 #include <asm-generic/bitops/__ffs.h>
15 #include <asm-generic/bitops/sched.h>
16 #include <asm-generic/bitops/ffz.h>
18 static __inline__ void set_bit(int nr, volatile unsigned long * addr)
20 #ifdef CONFIG_COLDFIRE
21 __asm__ __volatile__ ("lea %0,%%a0; bset %1,(%%a0)"
22 : "+m" (((volatile char *)addr)[(nr^31) >> 3])
26 __asm__ __volatile__ ("bset %1,%0"
27 : "+m" (((volatile char *)addr)[(nr^31) >> 3])
33 #define __set_bit(nr, addr) set_bit(nr, addr)
36 * clear_bit() doesn't provide any barrier for the compiler.
38 #define smp_mb__before_clear_bit() barrier()
39 #define smp_mb__after_clear_bit() barrier()
41 static __inline__ void clear_bit(int nr, volatile unsigned long * addr)
43 #ifdef CONFIG_COLDFIRE
44 __asm__ __volatile__ ("lea %0,%%a0; bclr %1,(%%a0)"
45 : "+m" (((volatile char *)addr)[(nr^31) >> 3])
49 __asm__ __volatile__ ("bclr %1,%0"
50 : "+m" (((volatile char *)addr)[(nr^31) >> 3])
56 #define __clear_bit(nr, addr) clear_bit(nr, addr)
58 static __inline__ void change_bit(int nr, volatile unsigned long * addr)
60 #ifdef CONFIG_COLDFIRE
61 __asm__ __volatile__ ("lea %0,%%a0; bchg %1,(%%a0)"
62 : "+m" (((volatile char *)addr)[(nr^31) >> 3])
66 __asm__ __volatile__ ("bchg %1,%0"
67 : "+m" (((volatile char *)addr)[(nr^31) >> 3])
73 #define __change_bit(nr, addr) change_bit(nr, addr)
75 static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr)
79 #ifdef CONFIG_COLDFIRE
80 __asm__ __volatile__ ("lea %1,%%a0; bset %2,(%%a0); sne %0"
81 : "=d" (retval), "+m" (((volatile char *)addr)[(nr^31) >> 3])
85 __asm__ __volatile__ ("bset %2,%1; sne %0"
86 : "=d" (retval), "+m" (((volatile char *)addr)[(nr^31) >> 3])
94 #define __test_and_set_bit(nr, addr) test_and_set_bit(nr, addr)
96 static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr)
100 #ifdef CONFIG_COLDFIRE
101 __asm__ __volatile__ ("lea %1,%%a0; bclr %2,(%%a0); sne %0"
102 : "=d" (retval), "+m" (((volatile char *)addr)[(nr^31) >> 3])
106 __asm__ __volatile__ ("bclr %2,%1; sne %0"
107 : "=d" (retval), "+m" (((volatile char *)addr)[(nr^31) >> 3])
115 #define __test_and_clear_bit(nr, addr) test_and_clear_bit(nr, addr)
117 static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
121 #ifdef CONFIG_COLDFIRE
122 __asm__ __volatile__ ("lea %1,%%a0\n\tbchg %2,(%%a0)\n\tsne %0"
123 : "=d" (retval), "+m" (((volatile char *)addr)[(nr^31) >> 3])
127 __asm__ __volatile__ ("bchg %2,%1; sne %0"
128 : "=d" (retval), "+m" (((volatile char *)addr)[(nr^31) >> 3])
136 #define __test_and_change_bit(nr, addr) test_and_change_bit(nr, addr)
139 * This routine doesn't need to be atomic.
141 static __inline__ int __constant_test_bit(int nr, const volatile unsigned long * addr)
143 return ((1UL << (nr & 31)) & (((const volatile unsigned int *) addr)[nr >> 5])) != 0;
146 static __inline__ int __test_bit(int nr, const volatile unsigned long * addr)
148 int * a = (int *) addr;
152 mask = 1 << (nr & 0x1f);
153 return ((mask & *a) != 0);
156 #define test_bit(nr,addr) \
157 (__builtin_constant_p(nr) ? \
158 __constant_test_bit((nr),(addr)) : \
159 __test_bit((nr),(addr)))
161 #include <asm-generic/bitops/find.h>
162 #include <asm-generic/bitops/hweight.h>
164 static __inline__ int ext2_set_bit(int nr, volatile void * addr)
168 #ifdef CONFIG_COLDFIRE
169 __asm__ __volatile__ ("lea %1,%%a0; bset %2,(%%a0); sne %0"
170 : "=d" (retval), "+m" (((volatile char *)addr)[nr >> 3])
174 __asm__ __volatile__ ("bset %2,%1; sne %0"
175 : "=d" (retval), "+m" (((volatile char *)addr)[nr >> 3])
183 static __inline__ int ext2_clear_bit(int nr, volatile void * addr)
187 #ifdef CONFIG_COLDFIRE
188 __asm__ __volatile__ ("lea %1,%%a0; bclr %2,(%%a0); sne %0"
189 : "=d" (retval), "+m" (((volatile char *)addr)[nr >> 3])
193 __asm__ __volatile__ ("bclr %2,%1; sne %0"
194 : "=d" (retval), "+m" (((volatile char *)addr)[nr >> 3])
202 #define ext2_set_bit_atomic(lock, nr, addr) \
206 ret = ext2_set_bit((nr), (addr)); \
211 #define ext2_clear_bit_atomic(lock, nr, addr) \
215 ret = ext2_clear_bit((nr), (addr)); \
220 static __inline__ int ext2_test_bit(int nr, const volatile void * addr)
224 #ifdef CONFIG_COLDFIRE
225 __asm__ __volatile__ ("lea %1,%%a0; btst %2,(%%a0); sne %0"
227 : "m" (((const volatile char *)addr)[nr >> 3]), "d" (nr)
230 __asm__ __volatile__ ("btst %2,%1; sne %0"
232 : "m" (((const volatile char *)addr)[nr >> 3]), "di" (nr)
239 #define ext2_find_first_zero_bit(addr, size) \
240 ext2_find_next_zero_bit((addr), (size), 0)
242 static __inline__ unsigned long ext2_find_next_zero_bit(void *addr, unsigned long size, unsigned long offset)
244 unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
245 unsigned long result = offset & ~31UL;
253 /* We hold the little endian value in tmp, but then the
254 * shift is illegal. So we could keep a big endian value
257 * tmp = __swab32(*(p++));
258 * tmp |= ~0UL >> (32-offset);
260 * but this would decrease preformance, so we change the
264 tmp |= __swab32(~0UL >> (32-offset));
272 while(size & ~31UL) {
283 /* tmp is little endian, so we would have to swab the shift,
284 * see above. But then we have to swab tmp below for ffz, so
285 * we might as well do this here.
287 return result + ffz(__swab32(tmp) | (~0UL << size));
289 return result + ffz(__swab32(tmp));
292 #include <asm-generic/bitops/minix.h>
294 #endif /* __KERNEL__ */
296 #include <asm-generic/bitops/fls.h>
297 #include <asm-generic/bitops/fls64.h>
299 #endif /* _M68KNOMMU_BITOPS_H */