1 /*
2 * Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of the
7 * License, or any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 FILE_LICENCE ( GPL2_OR_LATER );
20
21 #include <errno.h>
22 #include <gpxe/smbios.h>
23 #include <gpxe/efi/efi.h>
24 #include <gpxe/efi/Guid/SmBios.h>
25
26 /** @file
27 *
28 * gPXE SMBIOS API for EFI
29 *
30 */
31
32 /** SMBIOS configuration table */
33 static struct smbios_entry *smbios_entry;
34 EFI_USE_TABLE ( EFI_SMBIOS_TABLE, &smbios_entry, 0 );
35
36 /**
37 * Find SMBIOS
38 *
39 * @v smbios SMBIOS entry point descriptor structure to fill in
40 * @ret rc Return status code
41 */
efi_find_smbios(struct smbios * smbios)42 static int efi_find_smbios ( struct smbios *smbios ) {
43
44 if ( ! smbios_entry ) {
45 DBG ( "No SMBIOS table provided\n" );
46 return -ENODEV;
47 }
48
49 if ( smbios_entry->signature != SMBIOS_SIGNATURE ) {
50 DBG ( "Invalid SMBIOS signature\n" );
51 return -ENODEV;
52 }
53
54 smbios->address = phys_to_user ( smbios_entry->smbios_address );
55 smbios->len = smbios_entry->smbios_len;
56 smbios->count = smbios_entry->smbios_count;
57 DBG ( "Found SMBIOS v%d.%d entry point at %p (%x+%zx)\n",
58 smbios_entry->major, smbios_entry->minor, smbios_entry,
59 smbios_entry->smbios_address, smbios->len );
60
61 return 0;
62 }
63
64 PROVIDE_SMBIOS ( efi, find_smbios, efi_find_smbios );
65