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https://github.com/opnsense/src.git
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22e20d852f
Fix a bug that slipped in in 90707c4e44
using the correct field in le32p_replace_bits().
MFC after: 3 days
Reviewed by: hselasky
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31352
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2020 The FreeBSD Foundation
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*
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* This software was developed by Björn Zeeb under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_BITFIELD_H
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#define _LINUX_BITFIELD_H
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#include <linux/types.h>
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#include <asm/byteorder.h>
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/* Use largest possible type. */
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static inline uint64_t ___lsb(uint64_t f) { return (f & -f); }
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static inline uint64_t ___bitmask(uint64_t f) { return (f / ___lsb(f)); }
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#define _uX_get_bits(_n) \
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static __inline uint ## _n ## _t \
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u ## _n ## _get_bits(uint ## _n ## _t v, uint ## _n ## _t f) \
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{ \
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return ((v & f) / ___lsb(f)); \
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}
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_uX_get_bits(64)
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_uX_get_bits(32)
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_uX_get_bits(16)
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_uX_get_bits(8)
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#define _leX_get_bits(_n) \
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static __inline uint ## _n ## _t \
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le ## _n ## _get_bits(__le ## _n v, uint ## _n ## _t f) \
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{ \
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return ((le ## _n ## _to_cpu(v) & f) / ___lsb(f)); \
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}
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_leX_get_bits(64)
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_leX_get_bits(32)
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_leX_get_bits(16)
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#define _uX_encode_bits(_n) \
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static __inline uint ## _n ## _t \
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u ## _n ## _encode_bits(uint ## _n ## _t v, uint ## _n ## _t f) \
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{ \
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return ((v & ___bitmask(f)) * ___lsb(f)); \
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}
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_uX_encode_bits(64)
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_uX_encode_bits(32)
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_uX_encode_bits(16)
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_uX_encode_bits(8)
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#define _leX_encode_bits(_n) \
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static __inline uint ## _n ## _t \
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le ## _n ## _encode_bits(__le ## _n v, uint ## _n ## _t f) \
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{ \
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return (cpu_to_le ## _n((v & ___bitmask(f)) * ___lsb(f))); \
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}
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_leX_encode_bits(64)
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_leX_encode_bits(32)
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_leX_encode_bits(16)
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static __inline void
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le32p_replace_bits(uint32_t *p, uint32_t v, uint32_t f)
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{
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*p = (*p & ~(cpu_to_le32(f))) | le32_encode_bits(v, f);
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}
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#define __bf_shf(x) (__builtin_ffsll(x) - 1)
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#define FIELD_PREP(_mask, _value) \
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(((typeof(_mask))(_value) << __bf_shf(_mask)) & (_mask))
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#define FIELD_GET(_mask, _value) \
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((typeof(_mask))(((_value) & (_mask)) >> __bf_shf(_mask)))
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#endif /* _LINUX_BITFIELD_H */
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