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#ifndef _GPXE_SMBIOS_H
#define _GPXE_SMBIOS_H
/** @file
*
* System Management BIOS
*
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <stdint.h>
#include <gpxe/api.h>
#include <config/general.h>
#include <gpxe/uaccess.h>
/**
* Provide an SMBIOS API implementation
*
* @v _prefix Subsystem prefix
* @v _api_func API function
* @v _func Implementing function
*/
#define PROVIDE_SMBIOS( _subsys, _api_func, _func ) \
PROVIDE_SINGLE_API ( SMBIOS_PREFIX_ ## _subsys, _api_func, _func )
/* Include all architecture-independent SMBIOS API headers */
#include <gpxe/efi/efi_smbios.h>
/* Include all architecture-dependent SMBIOS API headers */
#include <bits/smbios.h>
/** Signature for SMBIOS entry point */
#define SMBIOS_SIGNATURE \
( ( '_' << 0 ) + ( 'S' << 8 ) + ( 'M' << 16 ) + ( '_' << 24 ) )
/**
* SMBIOS entry point
*
* This is the single table which describes the list of SMBIOS
* structures. It is located by scanning through the BIOS segment.
*/
struct smbios_entry {
/** Signature
*
* Must be equal to SMBIOS_SIGNATURE
*/
uint32_t signature;
/** Checksum */
uint8_t checksum;
/** Length */
uint8_t len;
/** Major version */
uint8_t major;
/** Minor version */
uint8_t minor;
/** Maximum structure size */
uint16_t max;
/** Entry point revision */
uint8_t revision;
/** Formatted area */
uint8_t formatted[5];
/** DMI Signature */
uint8_t dmi_signature[5];
/** DMI checksum */
uint8_t dmi_checksum;
/** Structure table length */
uint16_t smbios_len;
/** Structure table address */
uint32_t smbios_address;
/** Number of SMBIOS structures */
uint16_t smbios_count;
/** BCD revision */
uint8_t bcd_revision;
} __attribute__ (( packed ));
/** An SMBIOS structure header */
struct smbios_header {
/** Type */
uint8_t type;
/** Length */
uint8_t len;
/** Handle */
uint16_t handle;
} __attribute__ (( packed ));
/** SMBIOS structure descriptor */
struct smbios_structure {
/** Copy of SMBIOS structure header */
struct smbios_header header;
/** Offset of structure within SMBIOS */
size_t offset;
/** Length of strings section */
size_t strings_len;
};
/** SMBIOS system information structure */
struct smbios_system_information {
/** SMBIOS structure header */
struct smbios_header header;
/** Manufacturer string */
uint8_t manufacturer;
/** Product string */
uint8_t product;
/** Version string */
uint8_t version;
/** Serial number string */
uint8_t serial;
/** UUID */
uint8_t uuid[16];
/** Wake-up type */
uint8_t wakeup;
} __attribute__ (( packed ));
/** SMBIOS system information structure type */
#define SMBIOS_TYPE_SYSTEM_INFORMATION 1
/** SMBIOS enclosure information structure */
struct smbios_enclosure_information {
/** SMBIOS structure header */
struct smbios_header header;
/** Manufacturer string */
uint8_t manufacturer;
/** Type string */
uint8_t type;
/** Version string */
uint8_t version;
/** Serial number string */
uint8_t serial;
/** Asset tag */
uint8_t asset_tag;
} __attribute__ (( packed ));
/** SMBIOS enclosure information structure type */
#define SMBIOS_TYPE_ENCLOSURE_INFORMATION 3
/**
* SMBIOS entry point descriptor
*
* This contains the information from the SMBIOS entry point that we
* care about.
*/
struct smbios {
/** Start of SMBIOS structures */
userptr_t address;
/** Length of SMBIOS structures */
size_t len;
/** Number of SMBIOS structures */
unsigned int count;
};
extern int find_smbios ( struct smbios *smbios );
extern int find_smbios_structure ( unsigned int type,
struct smbios_structure *structure );
extern int read_smbios_structure ( struct smbios_structure *structure,
void *data, size_t len );
extern int read_smbios_string ( struct smbios_structure *structure,
unsigned int index,
void *data, size_t len );
#endif /* _GPXE_SMBIOS_H */
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