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