iPXE
bios_smbios.c
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00001 /*
00002  * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License as
00006  * published by the Free Software Foundation; either version 2 of the
00007  * License, or any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful, but
00010  * WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software
00016  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017  * 02110-1301, USA.
00018  *
00019  * You can also choose to distribute this program under the terms of
00020  * the Unmodified Binary Distribution Licence (as given in the file
00021  * COPYING.UBDL), provided that you have satisfied its requirements.
00022  */
00023 
00024 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
00025 
00026 #include <stdint.h>
00027 #include <string.h>
00028 #include <errno.h>
00029 #include <assert.h>
00030 #include <ipxe/uaccess.h>
00031 #include <ipxe/smbios.h>
00032 #include <realmode.h>
00033 #include <pnpbios.h>
00034 
00035 /** @file
00036  *
00037  * System Management BIOS
00038  *
00039  */
00040 
00041 /**
00042  * Find SMBIOS
00043  *
00044  * @v smbios            SMBIOS entry point descriptor structure to fill in
00045  * @ret rc              Return status code
00046  */
00047 static int bios_find_smbios ( struct smbios *smbios ) {
00048         struct smbios_entry entry;
00049         int rc;
00050 
00051         /* Scan through BIOS segment to find SMBIOS entry point */
00052         if ( ( rc = find_smbios_entry ( real_to_user ( BIOS_SEG, 0 ), 0x10000,
00053                                         &entry ) ) != 0 )
00054                 return rc;
00055 
00056         /* Fill in entry point descriptor structure */
00057         smbios->address = phys_to_user ( entry.smbios_address );
00058         smbios->len = entry.smbios_len;
00059         smbios->count = entry.smbios_count;
00060         smbios->version = SMBIOS_VERSION ( entry.major, entry.minor );
00061 
00062         return 0;
00063 }
00064 
00065 PROVIDE_SMBIOS ( pcbios, find_smbios, bios_find_smbios );