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Ventoy/wimboot/wimboot-2.7.3/src/efipath.h

90 lines
2.2 KiB
C

#ifndef _EFIPATH_H
#define _EFIPATH_H
/*
* Copyright (C) 2014 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* @file
*
* EFI device paths
*
*/
#include "efi.h"
#include "efi/Protocol/DevicePath.h"
/**
* Initialise device path
*
* @v name Variable name
* @v type Type
* @v subtype Subtype
*/
#define EFI_DEVPATH_INIT( name, type, subtype ) { \
.Type = (type), \
.SubType = (subtype), \
.Length[0] = ( sizeof (name) & 0xff ), \
.Length[1] = ( sizeof (name) >> 8 ), \
}
/**
* Initialise device path
*
* @v path Device path
* @v type Type
* @v subtype Subtype
* @v len Length
*/
static inline __attribute__ (( always_inline )) void
efi_devpath_init ( EFI_DEVICE_PATH_PROTOCOL *path, unsigned int type,
unsigned int subtype, size_t len ) {
path->Type = type;
path->SubType = subtype;
path->Length[0] = ( len & 0xff );
path->Length[1] = ( len >> 8 );
}
/**
* Initialise device path end
*
* @v name Variable name
*/
#define EFI_DEVPATH_END_INIT( name ) \
EFI_DEVPATH_INIT ( name, END_DEVICE_PATH_TYPE, \
END_ENTIRE_DEVICE_PATH_SUBTYPE )
/**
* Initialise device path end
*
* @v path Device path
*/
static inline __attribute__ (( always_inline )) void
efi_devpath_end_init ( EFI_DEVICE_PATH_PROTOCOL *path ) {
efi_devpath_init ( path, END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE, sizeof ( *path ) );
}
extern EFI_DEVICE_PATH_PROTOCOL *
efi_devpath_end ( EFI_DEVICE_PATH_PROTOCOL *path );
#endif /* _EFIPATH_H */