smbios.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 1997 Michael Smith
    5  * Copyright (c) 1998 Jonathan Lemon
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD$
   30  */
   31 
   32 #ifndef _SMBIOS_H_
   33 #define _SMBIOS_H_
   34 
   35 /*
   36  * System Management BIOS
   37  */
   38 #define SMBIOS_START    0xf0000
   39 #define SMBIOS_STEP     0x10
   40 #define SMBIOS_OFF      0
   41 #define SMBIOS_LEN      4
   42 #define SMBIOS_SIG      "_SM_"
   43 
   44 struct smbios_eps {
   45         uint8_t         anchor_string[4];               /* '_SM_' */
   46         uint8_t         checksum;
   47         uint8_t         length;
   48         uint8_t         major_version;
   49         uint8_t         minor_version;
   50         uint16_t        maximum_structure_size;
   51         uint8_t         entry_point_revision;
   52         uint8_t         formatted_area[5];
   53         uint8_t         intermediate_anchor_string[5];  /* '_DMI_' */
   54         uint8_t         intermediate_checksum;
   55         uint16_t        structure_table_length;
   56         uint32_t        structure_table_address;
   57         uint16_t        number_structures;
   58         uint8_t         BCD_revision;
   59 } __packed;
   60 
   61 struct smbios_structure_header {
   62         uint8_t         type;
   63         uint8_t         length;
   64         uint16_t        handle;
   65 } __packed;
   66 
   67 typedef void (*smbios_callback_t)(struct smbios_structure_header *, void *);
   68 
   69 static inline void
   70 smbios_walk_table(uint8_t *p, int entries, smbios_callback_t cb, void *arg)
   71 {
   72         struct smbios_structure_header *s;
   73 
   74         while (entries--) {
   75                 s = (struct smbios_structure_header *)p;
   76                 cb(s, arg);
   77 
   78                 /*
   79                  * Look for a double-nul after the end of the
   80                  * formatted area of this structure.
   81                  */
   82                 p += s->length;
   83                 while (!(p[0] == 0 && p[1] == 0))
   84                         p++;
   85 
   86                 /*
   87                  * Skip over the double-nul to the start of the next
   88                  * structure.
   89                  */
   90                 p += 2;
   91         }
   92 }
   93 
   94 #endif /* _SMBIOS_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/smbios/smbios.h

FreeBSD/Linux Kernel Cross Reference
sys/dev/smbios/smbios.h