1/*
2 * bitops.h: Bit string operations on the m68k
3 */
4
5#ifndef _M68K_BITOPS_H
6#define _M68K_BITOPS_H
7
8#include <asm/byteorder.h>
9#include <asm-generic/bitops/fls.h>
10#include <asm-generic/bitops/__fls.h>
11#include <asm-generic/bitops/fls64.h>
12#include <asm-generic/bitops/__ffs.h>
13
14extern void set_bit(int nr, volatile void *addr);
15extern void clear_bit(int nr, volatile void *addr);
16extern void change_bit(int nr, volatile void *addr);
17extern int test_and_clear_bit(int nr, volatile void *addr);
18extern int test_and_change_bit(int nr, volatile void *addr);
19
20#ifdef __KERNEL__
21
22
23static inline int test_bit(int nr, __const__ volatile void *addr)
24{
25	__const__ unsigned int *p = (__const__ unsigned int *) addr;
26
27	return (p[nr >> 5] & (1UL << (nr & 31))) != 0;
28}
29
30static inline int test_and_set_bit(int nr, volatile void *vaddr)
31{
32	char retval;
33
34	volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
35	__asm__ __volatile__ ("bset %2,(%4); sne %0"
36	     : "=d" (retval), "=m" (*p)
37	     : "di" (nr & 7), "m" (*p), "a" (p));
38
39	return retval;
40}
41
42#define __ffs(x) (ffs(x) - 1)
43
44/*
45 *  * hweightN: returns the hamming weight (i.e. the number
46 *   * of bits set) of a N-bit word
47 *    */
48
49#define hweight32(x) generic_hweight32(x)
50#define hweight16(x) generic_hweight16(x)
51#define hweight8(x) generic_hweight8(x)
52
53#endif /* __KERNEL__ */
54
55#endif /* _M68K_BITOPS_H */
56