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/*-
* Copyright (c) 2017 Netflix, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _EFIVAR_DP_H_
#define _EFIVAR_DP_H_
/*
* "Linux compatible" efivar-dp.h header. At the moment, it's really a
* very thin, minimal interface.
*/
/*
* Generic EFI_DEVICE_PATH, spelled the Linux way. We use this
* interface to the outside world and type-pun to the EFI EDK2 code
* we use to implement it.
*/
typedef struct {
uint8_t type;
uint8_t subtype;
uint16_t length;
} __packed efidp_header;
/* NB: Linux has shadow types for all dp type */
typedef union {
efidp_header header;
} efidp_data;
typedef efidp_data *efidp;
typedef const efidp_data *const_efidp;
/** format a device path into UEFI standard conforming output.
*
* NB: FreeBSD's implementation is taken from EDK2, while Linux's
* was hand-rolled. There may be differences as a result.
*/
ssize_t efidp_format_device_path(char *buf, size_t len, const_efidp dp,
ssize_t max);
ssize_t efidp_parse_device_path(char *path, efidp out, size_t max);
#endif /* _EFIVAR_DP_H_ */
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