44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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/* fdt.c - EFI Flattened Device Tree interaction */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/efi/efi.h>
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#include <grub/mm.h>
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void *
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grub_efi_get_firmware_fdt (void)
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{
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grub_efi_configuration_table_t *tables;
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grub_efi_guid_t fdt_guid = GRUB_EFI_DEVICE_TREE_GUID;
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void *firmware_fdt = NULL;
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unsigned int i;
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/* Look for FDT in UEFI config tables. */
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tables = grub_efi_system_table->configuration_table;
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for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
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if (grub_memcmp (&tables[i].vendor_guid, &fdt_guid, sizeof (fdt_guid)) == 0)
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{
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firmware_fdt = tables[i].vendor_table;
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grub_dprintf ("linux", "found registered FDT @ %p\n", firmware_fdt);
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break;
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}
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return firmware_fdt;
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}
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