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 14 extern void set_bit(int nr, volatile void *addr); 15 extern void clear_bit(int nr, volatile void *addr); 16 extern void change_bit(int nr, volatile void *addr); 17 extern int test_and_clear_bit(int nr, volatile void *addr); 18 extern int test_and_change_bit(int nr, volatile void *addr); 19 20 #ifdef __KERNEL__ 21 22 23 static 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 30 static 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