f689cb23b2
This function will be used for exposing DMI info as sysctls in the smbios module (in an upcoming review). While here, add __packed to the structs. Reviewed by: dab MFC after: 1 week Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D29270
95 lines
2.7 KiB
C
95 lines
2.7 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1997 Michael Smith
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* Copyright (c) 1998 Jonathan Lemon
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SMBIOS_H_
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#define _SMBIOS_H_
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/*
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* System Management BIOS
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*/
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#define SMBIOS_START 0xf0000
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#define SMBIOS_STEP 0x10
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#define SMBIOS_OFF 0
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#define SMBIOS_LEN 4
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#define SMBIOS_SIG "_SM_"
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struct smbios_eps {
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uint8_t anchor_string[4]; /* '_SM_' */
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uint8_t checksum;
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uint8_t length;
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uint8_t major_version;
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uint8_t minor_version;
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uint16_t maximum_structure_size;
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uint8_t entry_point_revision;
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uint8_t formatted_area[5];
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uint8_t intermediate_anchor_string[5]; /* '_DMI_' */
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uint8_t intermediate_checksum;
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uint16_t structure_table_length;
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uint32_t structure_table_address;
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uint16_t number_structures;
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uint8_t BCD_revision;
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} __packed;
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struct smbios_structure_header {
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uint8_t type;
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uint8_t length;
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uint16_t handle;
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} __packed;
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typedef void (*smbios_callback_t)(struct smbios_structure_header *, void *);
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static inline void
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smbios_walk_table(uint8_t *p, int entries, smbios_callback_t cb, void *arg)
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{
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struct smbios_structure_header *s;
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while (entries--) {
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s = (struct smbios_structure_header *)p;
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cb(s, arg);
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/*
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* Look for a double-nul after the end of the
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* formatted area of this structure.
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*/
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p += s->length;
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while (!(p[0] == 0 && p[1] == 0))
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p++;
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/*
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* Skip over the double-nul to the start of the next
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* structure.
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*/
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p += 2;
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}
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}
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#endif /* _SMBIOS_H_ */
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