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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 1997 Michael Smith
* Copyright (c) 1998 Jonathan Lemon
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _SMBIOS_H_
#define _SMBIOS_H_
/*
* System Management BIOS
*/
#define SMBIOS_START 0xf0000
#define SMBIOS_STEP 0x10
#define SMBIOS_OFF 0
#define SMBIOS_LEN 4
#define SMBIOS_SIG "_SM_"
#define SMBIOS3_LEN 5
#define SMBIOS3_SIG "_SM3_"
struct smbios_eps {
uint8_t anchor_string[4]; /* '_SM_' */
uint8_t checksum;
uint8_t length;
uint8_t major_version;
uint8_t minor_version;
uint16_t maximum_structure_size;
uint8_t entry_point_revision;
uint8_t formatted_area[5];
uint8_t intermediate_anchor_string[5]; /* '_DMI_' */
uint8_t intermediate_checksum;
uint16_t structure_table_length;
uint32_t structure_table_address;
uint16_t number_structures;
uint8_t BCD_revision;
} __packed;
struct smbios3_eps {
uint8_t anchor_string[5]; /* '_SM3_' */
uint8_t checksum;
uint8_t length;
uint8_t major_version;
uint8_t minor_version;
uint8_t docrev;
uint8_t entry_point_revision;
uint8_t reserved;
uint32_t structure_table_max_size;
uint64_t structure_table_address;
};
struct smbios_structure_header {
uint8_t type;
uint8_t length;
uint16_t handle;
} __packed;
typedef void (*smbios_callback_t)(struct smbios_structure_header *, void *);
static inline void
smbios_walk_table(uint8_t *p, int entries, vm_size_t len,
smbios_callback_t cb, void *arg)
{
struct smbios_structure_header *s;
uint8_t *endp = p + len;
while (entries-- && p < endp) {
s = (struct smbios_structure_header *)p;
cb(s, arg);
/*
* Look for a double-nul after the end of the
* formatted area of this structure.
*/
p += s->length;
while (p + 1 < endp && !(p[0] == 0 && p[1] == 0))
p++;
/*
* Skip over the double-nul to the start of the next
* structure.
*/
p += 2;
}
}
#ifdef _KERNEL
void identify_hypervisor_smbios(void);
#endif
#endif /* _SMBIOS_H_ */
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