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https://github.com/freebsd/freebsd-src
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98 lines
2.5 KiB
C
98 lines
2.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2017, Bryan Venteicher <bryanv@FreeBSD.org>
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* All rights reserved.
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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 unmodified, this list of conditions, and the following
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* 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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _VIRTIO_ENDIAN_H_
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#define _VIRTIO_ENDIAN_H_
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#include <sys/endian.h>
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#ifndef _KERNEL
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#include <stdbool.h>
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#endif /* _KERNEL */
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/*
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* VirtIO V1 (modern) uses little endian, while legacy VirtIO uses the guest's
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* native endian. These functions convert to and from the Guest's (driver's)
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* and the Host's (device's) endianness when needed.
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*/
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static inline uint16_t
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virtio_htog16(bool modern, uint16_t val)
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{
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if (modern)
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return (le16toh(val));
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else
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return (val);
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}
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static inline uint16_t
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virtio_gtoh16(bool modern, uint16_t val)
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{
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if (modern)
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return (htole16(val));
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else
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return (val);
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}
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static inline uint32_t
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virtio_htog32(bool modern, uint32_t val)
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{
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if (modern)
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return (le32toh(val));
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else
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return (val);
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}
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static inline uint32_t
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virtio_gtoh32(bool modern, uint32_t val)
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{
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if (modern)
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return (htole32(val));
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else
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return (val);
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}
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static inline uint64_t
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virtio_htog64(bool modern, uint64_t val)
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{
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if (modern)
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return (le64toh(val));
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else
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return (val);
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}
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static inline uint64_t
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virtio_gtoh64(bool modern, uint64_t val)
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{
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if (modern)
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return (htole64(val));
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else
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return (val);
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}
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#endif /* _VIRTIO_ENDIAN_H_ */
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