61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/* bitops.h COPYRIGHT FUJITSU LIMITED 2014 */
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#ifndef INCLUDE_BITOPS_H
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#define INCLUDE_BITOPS_H
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#include <types.h>
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#define __BITS_TO_LONGS(n,d) (((n) + (d) - 1) / (d))
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#define BITS_TO_LONGS(nr) __BITS_TO_LONGS(nr, BITS_PER_LONG)
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#define DECLARE_BITMAP(name,bits) unsigned long name[BITS_TO_LONGS(bits)]
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#define for_each_set_bit(bit, addr, size) \
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for ((bit) = find_first_bit((addr), (size)); \
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(bit) < (size); \
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(bit) = find_next_bit((addr), (size), (bit) + 1))
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#ifndef __ASSEMBLY__
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unsigned long find_next_bit(const unsigned long *addr, unsigned long size,
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unsigned long offset);
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unsigned long find_next_zero_bit(const unsigned long *addr,
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unsigned long size, unsigned long offset);
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unsigned long find_first_bit(const unsigned long *addr,
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unsigned long size);
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unsigned long find_first_zero_bit(const unsigned long *addr,
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unsigned long size);
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static inline int test_bit(int nr, const void *addr)
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{
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const uint32_t *p = (const uint32_t *)addr;
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return ((1UL << (nr & 31)) & (p[nr >> 5])) != 0;
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}
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extern unsigned int __sw_hweight32(unsigned int w);
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extern unsigned int __sw_hweight16(unsigned int w);
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extern unsigned int __sw_hweight8(unsigned int w);
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extern unsigned long __sw_hweight64(uint64_t w);
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static inline unsigned long hweight_long(unsigned long w)
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{
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return sizeof(w) == 4 ? __sw_hweight32(w) : __sw_hweight64(w);
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}
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#define BIT(nr) (1UL << (nr))
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#define BIT_WORD(nr) ((nr) / BITS_PER_LONG)
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#define BITS_PER_BYTE 8
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#define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
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#define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask))
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#define __ALIGN_KERNEL(x, a) __ALIGN_KERNEL_MASK(x, (typeof(x))(a) - 1)
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#define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
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#endif /*__ASSEMBLY__*/
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#include <arch-bitops.h>
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#endif /*INCLUDE_BITOPS_H*/
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