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[smbios] Add support for the 64-bit SMBIOS3 entry point

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Support UEFI systems that provide only 64-bit versions of the SMBIOS
entry point.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2020-12-29 14:37:54 +00:00
parent 485f8ce554
commit dced22d6de
3 changed files with 82 additions and 22 deletions
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51
src/include/ipxe/smbios.h
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@@ -31,15 +31,20 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
/* Include all architecture-dependent SMBIOS API headers */
#include <bits/smbios.h>
/** Signature for SMBIOS entry point */
/** Signature for 32-bit SMBIOS entry point */
#define SMBIOS_SIGNATURE \
( ( '_' << 0 ) + ( 'S' << 8 ) + ( 'M' << 16 ) + ( '_' << 24 ) )
/** Signature for 64-bit SMBIOS entry point */
#define SMBIOS3_SIGNATURE \
( ( '_' << 0 ) + ( 'S' << 8 ) + ( 'M' << 16 ) + ( '3' << 24 ) )
/**
* SMBIOS entry point
* SMBIOS 32-bit entry point
*
* This is the single table which describes the list of SMBIOS
* structures. It is located by scanning through the BIOS segment.
* This is the 32-bit version of the table which describes the list of
* SMBIOS structures. It may be located by scanning through the BIOS
* segment or via an EFI configuration table.
*/
struct smbios_entry {
/** Signature
@@ -75,6 +80,41 @@ struct smbios_entry {
uint8_t bcd_revision;
} __attribute__ (( packed ));
/**
* SMBIOS 64-bit entry point
*
* This is the 64-bit version of the table which describes the list of
* SMBIOS structures. It may be located by scanning through the BIOS
* segment or via an EFI configuration table.
*/
struct smbios3_entry {
/** Signature
*
* Must be equal to SMBIOS3_SIGNATURE
*/
uint32_t signature;
/** Signature extra byte */
uint8_t extra;
/** Checksum */
uint8_t checksum;
/** Length */
uint8_t len;
/** Major version */
uint8_t major;
/** Minor version */
uint8_t minor;
/** Documentation revision */
uint8_t docrev;
/** Entry point revision */
uint8_t revision;
/** Reserved */
uint8_t reserved;
/** Structure table length */
uint32_t smbios_len;
/** Structure table address */
uint64_t smbios_address;
} __attribute__ (( packed ));
/** An SMBIOS structure header */
struct smbios_header {
/** Type */
@@ -155,6 +195,9 @@ struct smbios_enclosure_information {
/** SMBIOS OEM strings structure type */
#define SMBIOS_TYPE_OEM_STRINGS 11
/** SMBIOS end of table type */
#define SMBIOS_TYPE_END 127
/**
* SMBIOS entry point descriptor
*