diff options
Diffstat (limited to 'gpxe/src/interface/smbios/smbios.c')
| -rw-r--r-- | gpxe/src/interface/smbios/smbios.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/gpxe/src/interface/smbios/smbios.c b/gpxe/src/interface/smbios/smbios.c deleted file mode 100644 index cc7df59a..00000000 --- a/gpxe/src/interface/smbios/smbios.c +++ /dev/null @@ -1,180 +0,0 @@ -/* - * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <stdint.h> -#include <string.h> -#include <errno.h> -#include <assert.h> -#include <gpxe/uaccess.h> -#include <gpxe/smbios.h> - -/** @file - * - * System Management BIOS - * - */ - -/** SMBIOS entry point descriptor */ -static struct smbios smbios = { - .address = UNULL, -}; - -/** - * Find SMBIOS strings terminator - * - * @v offset Offset to start of strings - * @ret offset Offset to strings terminator, or 0 if not found - */ -static size_t find_strings_terminator ( size_t offset ) { - size_t max_offset = ( smbios.len - 2 ); - uint16_t nulnul; - - for ( ; offset <= max_offset ; offset++ ) { - copy_from_user ( &nulnul, smbios.address, offset, 2 ); - if ( nulnul == 0 ) - return ( offset + 1 ); - } - return 0; -} - -/** - * Find specific structure type within SMBIOS - * - * @v type Structure type to search for - * @v structure SMBIOS structure descriptor to fill in - * @ret rc Return status code - */ -int find_smbios_structure ( unsigned int type, - struct smbios_structure *structure ) { - unsigned int count = 0; - size_t offset = 0; - size_t strings_offset; - size_t terminator_offset; - int rc; - - /* Find SMBIOS */ - if ( ( smbios.address == UNULL ) && - ( ( rc = find_smbios ( &smbios ) ) != 0 ) ) - return rc; - assert ( smbios.address != UNULL ); - - /* Scan through list of structures */ - while ( ( ( offset + sizeof ( structure->header ) ) < smbios.len ) - && ( count < smbios.count ) ) { - - /* Read next SMBIOS structure header */ - copy_from_user ( &structure->header, smbios.address, offset, - sizeof ( structure->header ) ); - - /* Determine start and extent of strings block */ - strings_offset = ( offset + structure->header.len ); - if ( strings_offset > smbios.len ) { - DBG ( "SMBIOS structure at offset %zx with length " - "%x extends beyond SMBIOS\n", offset, - structure->header.len ); - return -ENOENT; - } - terminator_offset = find_strings_terminator ( strings_offset ); - if ( ! terminator_offset ) { - DBG ( "SMBIOS structure at offset %zx has " - "unterminated strings section\n", offset ); - return -ENOENT; - } - structure->strings_len = ( terminator_offset - strings_offset); - - DBG ( "SMBIOS structure at offset %zx has type %d, length %x, " - "strings length %zx\n", offset, structure->header.type, - structure->header.len, structure->strings_len ); - - /* If this is the structure we want, return */ - if ( structure->header.type == type ) { - structure->offset = offset; - return 0; - } - - /* Move to next SMBIOS structure */ - offset = ( terminator_offset + 1 ); - count++; - } - - DBG ( "SMBIOS structure type %d not found\n", type ); - return -ENOENT; -} - -/** - * Copy SMBIOS structure - * - * @v structure SMBIOS structure descriptor - * @v data Buffer to hold SMBIOS structure - * @v len Length of buffer - * @ret rc Return status code - */ -int read_smbios_structure ( struct smbios_structure *structure, - void *data, size_t len ) { - - assert ( smbios.address != UNULL ); - - if ( len > structure->header.len ) - len = structure->header.len; - copy_from_user ( data, smbios.address, structure->offset, len ); - return 0; -} - -/** - * Find indexed string within SMBIOS structure - * - * @v structure SMBIOS structure descriptor - * @v index String index - * @v data Buffer for string - * @v len Length of string buffer - * @ret rc Length of string, or negative error - */ -int read_smbios_string ( struct smbios_structure *structure, - unsigned int index, void *data, size_t len ) { - size_t strings_start = ( structure->offset + structure->header.len ); - size_t strings_end = ( strings_start + structure->strings_len ); - size_t offset; - size_t string_len; - - assert ( smbios.address != UNULL ); - - /* String numbers start at 1 (0 is used to indicate "no string") */ - if ( ! index ) - return -ENOENT; - - for ( offset = strings_start ; offset < strings_end ; - offset += ( string_len + 1 ) ) { - /* Get string length. This is known safe, since the - * smbios_strings struct is constructed so as to - * always end on a string boundary. - */ - string_len = strlen_user ( smbios.address, offset ); - if ( --index == 0 ) { - /* Copy string, truncating as necessary. */ - if ( len > string_len ) - len = string_len; - copy_from_user ( data, smbios.address, offset, len ); - return string_len; - } - } - - DBG ( "SMBIOS string index %d not found\n", index ); - return -ENOENT; -} |