u-boot/arch/m68k/include/asm/bitops.h
Alison Wang f7799a1175 ColdFire: Update the bitops for ColdFire platform
This patch uses the general ffs definition to replace the
platform ffs definition.

This patch also fixes the build error by adding hweightN
definition for m5329evb and m5373evb.

Signed-off-by: Jason Jin <Jason.jin@freescale.com>
Signed-off-by: Alison Wang <b18965@freescale.com>
2012-09-20 20:37:40 +08:00

53 lines
1.3 KiB
C

/*
* bitops.h: Bit string operations on the m68k
*/
#ifndef _M68K_BITOPS_H
#define _M68K_BITOPS_H
#include <linux/config.h>
#include <asm/byteorder.h>
extern void set_bit(int nr, volatile void *addr);
extern void clear_bit(int nr, volatile void *addr);
extern void change_bit(int nr, volatile void *addr);
extern int test_and_set_bit(int nr, volatile void *addr);
extern int test_and_clear_bit(int nr, volatile void *addr);
extern int test_and_change_bit(int nr, volatile void *addr);
#ifdef __KERNEL__
extern inline int test_bit(int nr, __const__ volatile void *addr)
{
__const__ unsigned int *p = (__const__ unsigned int *) addr;
return (p[nr >> 5] & (1UL << (nr & 31))) != 0;
}
extern inline int test_and_set_bit(int nr, volatile void *vaddr)
{
char retval;
volatile char *p = &((volatile char *)vaddr)[(nr^31) >> 3];
__asm__ __volatile__ ("bset %2,(%4); sne %0"
: "=d" (retval), "=m" (*p)
: "di" (nr & 7), "m" (*p), "a" (p));
return retval;
}
#define __ffs(x) (ffs(x) - 1)
/*
* * hweightN: returns the hamming weight (i.e. the number
* * of bits set) of a N-bit word
* */
#define hweight32(x) generic_hweight32(x)
#define hweight16(x) generic_hweight16(x)
#define hweight8(x) generic_hweight8(x)
#endif /* __KERNEL__ */
#endif /* _M68K_BITOPS_H */