129 строки
2.8 KiB
C
129 строки
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_GENERIC_BITOPS_LE_H_
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#define _ASM_GENERIC_BITOPS_LE_H_
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#include <asm-generic/bitops/find.h>
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#include <asm/types.h>
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#include <asm/byteorder.h>
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#include <linux/swab.h>
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#if defined(__LITTLE_ENDIAN)
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#define BITOP_LE_SWIZZLE 0
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static inline unsigned long find_next_zero_bit_le(const void *addr,
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unsigned long size, unsigned long offset)
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{
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return find_next_zero_bit(addr, size, offset);
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}
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static inline unsigned long find_next_bit_le(const void *addr,
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unsigned long size, unsigned long offset)
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{
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return find_next_bit(addr, size, offset);
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}
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static inline unsigned long find_first_zero_bit_le(const void *addr,
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unsigned long size)
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{
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return find_first_zero_bit(addr, size);
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}
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#elif defined(__BIG_ENDIAN)
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#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
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#ifndef find_next_zero_bit_le
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static inline
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unsigned long find_next_zero_bit_le(const void *addr, unsigned
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long size, unsigned long offset)
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{
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if (small_const_nbits(size)) {
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unsigned long val = *(const unsigned long *)addr;
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if (unlikely(offset >= size))
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return size;
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val = swab(val) | ~GENMASK(size - 1, offset);
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return val == ~0UL ? size : ffz(val);
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}
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return _find_next_bit(addr, NULL, size, offset, ~0UL, 1);
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}
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#endif
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#ifndef find_next_bit_le
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static inline
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unsigned long find_next_bit_le(const void *addr, unsigned
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long size, unsigned long offset)
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{
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if (small_const_nbits(size)) {
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unsigned long val = *(const unsigned long *)addr;
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if (unlikely(offset >= size))
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return size;
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val = swab(val) & GENMASK(size - 1, offset);
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return val ? __ffs(val) : size;
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}
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return _find_next_bit(addr, NULL, size, offset, 0UL, 1);
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}
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#endif
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#ifndef find_first_zero_bit_le
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#define find_first_zero_bit_le(addr, size) \
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find_next_zero_bit_le((addr), (size), 0)
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#endif
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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static inline int test_bit_le(int nr, const void *addr)
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{
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return test_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline void set_bit_le(int nr, void *addr)
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{
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set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline void clear_bit_le(int nr, void *addr)
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{
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clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline void __set_bit_le(int nr, void *addr)
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{
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__set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline void __clear_bit_le(int nr, void *addr)
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{
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__clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline int test_and_set_bit_le(int nr, void *addr)
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{
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return test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline int test_and_clear_bit_le(int nr, void *addr)
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{
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return test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline int __test_and_set_bit_le(int nr, void *addr)
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{
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return __test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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static inline int __test_and_clear_bit_le(int nr, void *addr)
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{
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return __test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);
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}
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#endif /* _ASM_GENERIC_BITOPS_LE_H_ */
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