blob: 07a2256329eace53c624e47d422b6bbcc0d227ff [file] [log] [blame]
/*
* Copyright (C) 2017 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 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.
*
* You can also choose to distribute this program under the terms of
* the Unmodified Binary Distribution Licence (as given in the file
* COPYING.UBDL), provided that you have satisfied its requirements.
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/**
* @file
*
* iPXE ACPI API for EFI
*
*/
#include <ipxe/acpi.h>
#include <ipxe/efi/efi.h>
#include <ipxe/efi/Guid/Acpi.h>
#include <ipxe/efi/efi_acpi.h>
/** ACPI configuration table */
static EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER *rsdp;
EFI_USE_TABLE ( ACPI_10_TABLE, &rsdp, 0 );
/**
* Locate ACPI root system description table
*
* @ret rsdt ACPI root system description table, or UNULL
*/
static userptr_t efi_find_rsdt ( void ) {
/* Locate RSDT via ACPI configuration table, if available */
if ( rsdp )
return phys_to_user ( rsdp->RsdtAddress );
return UNULL;
}
PROVIDE_ACPI ( efi, acpi_find_rsdt, efi_find_rsdt );
PROVIDE_ACPI_INLINE ( efi, acpi_find );