Michael Brown
2399c79980
When running on a platform that uses FDT as its hardware description mechanism, we are likely to have multiple device tree structures. At a minimum, there will be the device tree passed to us from the previous boot stage (e.g. OpenSBI), and the device tree that we construct to be passed to the booted operating system. Update the internal FDT API to include an FDT pointer in all function parameter lists. Signed-off-by: Michael Brown <mcb30@ipxe.org>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
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* Copyright (C) 2019 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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* 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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#include <string.h>
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#include <ipxe/fdt.h>
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#include <ipxe/init.h>
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#include <ipxe/efi/efi.h>
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#include <ipxe/efi/Guid/Fdt.h>
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/** @file
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*
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* EFI Flattened Device Tree
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*
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*/
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/** EFI Flattened Device Tree configuration table */
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static struct fdt_header *efi_fdt;
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EFI_USE_TABLE ( FDT_TABLE, &efi_fdt, 0 );
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/**
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* Initialise EFI Flattened Device Tree
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*
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*/
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static void efi_fdt_init ( void ) {
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int rc;
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/* Do nothing if no configuration table is present */
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if ( ! efi_fdt ) {
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DBGC ( &efi_fdt, "EFIFDT has no configuration table\n" );
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return;
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}
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DBGC ( &efi_fdt, "EFIFDT configuration table at %p\n", efi_fdt );
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/* Parse as system device tree */
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if ( ( rc = fdt_parse ( &sysfdt, efi_fdt ) ) != 0 ) {
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DBGC ( &efi_fdt, "EFIFDT could not parse: %s\n",
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strerror ( rc ) );
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return;
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}
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}
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/** EFI Flattened Device Tree initialisation function */
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struct init_fn efi_fdt_init_fn __init_fn ( INIT_EARLY ) = {
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.initialise = efi_fdt_init,
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};
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