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Extend the syntax for numerical SMBIOS settings from smbios/<type>.<offset>.<length> to smbios/[<instance>.]<type>.<offset>.<length> Where SMBIOS provides multiple structures with the same <type>, this extended syntax allows for access to structures other than the first. If <instance> is omitted then it will default to zero, giving access to the first instance (and so matching existing behaviour). The 16-bit SMBIOS handle (which is an alternative way to disambiguate multiple instances of the same type of structure) can be accessed, if required, using smbios/<instance>.<type>.2.2:uint16 Signed-off-by: Michael Brown <mcb30@ipxe.org>
175 lines
4.1 KiB
C
175 lines
4.1 KiB
C
#ifndef _IPXE_SMBIOS_H
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#define _IPXE_SMBIOS_H
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/** @file
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*
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* System Management BIOS
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER );
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#include <stdint.h>
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#include <ipxe/api.h>
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#include <config/general.h>
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#include <ipxe/uaccess.h>
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/**
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* Provide an SMBIOS API implementation
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*
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* @v _prefix Subsystem prefix
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* @v _api_func API function
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* @v _func Implementing function
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*/
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#define PROVIDE_SMBIOS( _subsys, _api_func, _func ) \
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PROVIDE_SINGLE_API ( SMBIOS_PREFIX_ ## _subsys, _api_func, _func )
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/* Include all architecture-independent SMBIOS API headers */
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#include <ipxe/efi/efi_smbios.h>
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#include <ipxe/linux/linux_smbios.h>
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/* Include all architecture-dependent SMBIOS API headers */
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#include <bits/smbios.h>
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/** Signature for SMBIOS entry point */
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#define SMBIOS_SIGNATURE \
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( ( '_' << 0 ) + ( 'S' << 8 ) + ( 'M' << 16 ) + ( '_' << 24 ) )
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/**
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* SMBIOS entry point
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*
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* This is the single table which describes the list of SMBIOS
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* structures. It is located by scanning through the BIOS segment.
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*/
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struct smbios_entry {
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/** Signature
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*
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* Must be equal to SMBIOS_SIGNATURE
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*/
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uint32_t signature;
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/** Checksum */
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uint8_t checksum;
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/** Length */
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uint8_t len;
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/** Major version */
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uint8_t major;
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/** Minor version */
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uint8_t minor;
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/** Maximum structure size */
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uint16_t max;
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/** Entry point revision */
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uint8_t revision;
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/** Formatted area */
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uint8_t formatted[5];
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/** DMI Signature */
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uint8_t dmi_signature[5];
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/** DMI checksum */
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uint8_t dmi_checksum;
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/** Structure table length */
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uint16_t smbios_len;
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/** Structure table address */
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uint32_t smbios_address;
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/** Number of SMBIOS structures */
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uint16_t smbios_count;
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/** BCD revision */
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uint8_t bcd_revision;
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} __attribute__ (( packed ));
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/** An SMBIOS structure header */
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struct smbios_header {
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/** Type */
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uint8_t type;
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/** Length */
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uint8_t len;
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/** Handle */
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uint16_t handle;
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} __attribute__ (( packed ));
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/** SMBIOS structure descriptor */
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struct smbios_structure {
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/** Copy of SMBIOS structure header */
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struct smbios_header header;
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/** Offset of structure within SMBIOS */
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size_t offset;
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/** Length of strings section */
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size_t strings_len;
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};
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/** SMBIOS system information structure */
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struct smbios_system_information {
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/** SMBIOS structure header */
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struct smbios_header header;
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/** Manufacturer string */
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uint8_t manufacturer;
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/** Product string */
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uint8_t product;
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/** Version string */
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uint8_t version;
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/** Serial number string */
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uint8_t serial;
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/** UUID */
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uint8_t uuid[16];
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/** Wake-up type */
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uint8_t wakeup;
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} __attribute__ (( packed ));
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/** SMBIOS system information structure type */
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#define SMBIOS_TYPE_SYSTEM_INFORMATION 1
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/** SMBIOS enclosure information structure */
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struct smbios_enclosure_information {
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/** SMBIOS structure header */
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struct smbios_header header;
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/** Manufacturer string */
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uint8_t manufacturer;
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/** Type string */
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uint8_t type;
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/** Version string */
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uint8_t version;
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/** Serial number string */
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uint8_t serial;
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/** Asset tag */
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uint8_t asset_tag;
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} __attribute__ (( packed ));
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/** SMBIOS enclosure information structure type */
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#define SMBIOS_TYPE_ENCLOSURE_INFORMATION 3
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/**
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* SMBIOS entry point descriptor
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*
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* This contains the information from the SMBIOS entry point that we
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* care about.
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*/
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struct smbios {
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/** Start of SMBIOS structures */
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userptr_t address;
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/** Length of SMBIOS structures */
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size_t len;
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/** Number of SMBIOS structures */
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unsigned int count;
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/** SMBIOS version */
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uint16_t version;
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};
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/**
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* Calculate SMBIOS version
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*
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* @v major Major version
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* @v minor Minor version
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* @ret version SMBIOS version
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*/
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#define SMBIOS_VERSION( major, minor ) ( ( (major) << 8 ) | (minor) )
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extern int find_smbios ( struct smbios *smbios );
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extern int find_smbios_structure ( unsigned int type, unsigned int instance,
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struct smbios_structure *structure );
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extern int read_smbios_structure ( struct smbios_structure *structure,
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void *data, size_t len );
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extern int read_smbios_string ( struct smbios_structure *structure,
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unsigned int index,
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void *data, size_t len );
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extern int smbios_version ( void );
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#endif /* _IPXE_SMBIOS_H */
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