1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * bitops.h: Bit string operations on the m68k
3*4882a593Smuzhiyun */
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #ifndef _M68K_BITOPS_H
6*4882a593Smuzhiyun #define _M68K_BITOPS_H
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <asm/byteorder.h>
9*4882a593Smuzhiyun #include <asm-generic/bitops/fls.h>
10*4882a593Smuzhiyun #include <asm-generic/bitops/__fls.h>
11*4882a593Smuzhiyun #include <asm-generic/bitops/fls64.h>
12*4882a593Smuzhiyun #include <asm-generic/bitops/__ffs.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun extern void set_bit(int nr, volatile void *addr);
15*4882a593Smuzhiyun extern void clear_bit(int nr, volatile void *addr);
16*4882a593Smuzhiyun extern void change_bit(int nr, volatile void *addr);
17*4882a593Smuzhiyun extern int test_and_clear_bit(int nr, volatile void *addr);
18*4882a593Smuzhiyun extern int test_and_change_bit(int nr, volatile void *addr);
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #ifdef __KERNEL__
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun
test_bit(int nr,__const__ volatile void * addr)23*4882a593Smuzhiyun static inline int test_bit(int nr, __const__ volatile void *addr)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun __const__ unsigned int *p = (__const__ unsigned int *) addr;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun return (p[nr >> 5] & (1UL << (nr & 31))) != 0;
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
test_and_set_bit(int nr,volatile void * vaddr)30*4882a593Smuzhiyun static inline int test_and_set_bit(int nr, volatile void *vaddr)
31*4882a593Smuzhiyun {
32*4882a593Smuzhiyun char retval;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
35*4882a593Smuzhiyun __asm__ __volatile__ ("bset %2,(%4); sne %0"
36*4882a593Smuzhiyun : "=d" (retval), "=m" (*p)
37*4882a593Smuzhiyun : "di" (nr & 7), "m" (*p), "a" (p));
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun return retval;
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun #define __ffs(x) (ffs(x) - 1)
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun /*
45*4882a593Smuzhiyun * * hweightN: returns the hamming weight (i.e. the number
46*4882a593Smuzhiyun * * of bits set) of a N-bit word
47*4882a593Smuzhiyun * */
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun #define hweight32(x) generic_hweight32(x)
50*4882a593Smuzhiyun #define hweight16(x) generic_hweight16(x)
51*4882a593Smuzhiyun #define hweight8(x) generic_hweight8(x)
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun #endif /* __KERNEL__ */
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun #endif /* _M68K_BITOPS_H */
56