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