1 #ifndef _GPXE_SMBIOS_H 2 #define _GPXE_SMBIOS_H 3 4 /** @file 5 * 6 * System Management BIOS 7 * 8 */ 9 10 FILE_LICENCE ( GPL2_OR_LATER ); 11 12 #include <stdint.h> 13 #include <gpxe/api.h> 14 #include <config/general.h> 15 #include <gpxe/uaccess.h> 16 17 /** 18 * Provide an SMBIOS API implementation 19 * 20 * @v _prefix Subsystem prefix 21 * @v _api_func API function 22 * @v _func Implementing function 23 */ 24 #define PROVIDE_SMBIOS( _subsys, _api_func, _func ) \ 25 PROVIDE_SINGLE_API ( SMBIOS_PREFIX_ ## _subsys, _api_func, _func ) 26 27 /* Include all architecture-independent SMBIOS API headers */ 28 #include <gpxe/efi/efi_smbios.h> 29 30 /* Include all architecture-dependent SMBIOS API headers */ 31 #include <bits/smbios.h> 32 33 /** Signature for SMBIOS entry point */ 34 #define SMBIOS_SIGNATURE \ 35 ( ( '_' << 0 ) + ( 'S' << 8 ) + ( 'M' << 16 ) + ( '_' << 24 ) ) 36 37 /** 38 * SMBIOS entry point 39 * 40 * This is the single table which describes the list of SMBIOS 41 * structures. It is located by scanning through the BIOS segment. 42 */ 43 struct smbios_entry { 44 /** Signature 45 * 46 * Must be equal to SMBIOS_SIGNATURE 47 */ 48 uint32_t signature; 49 /** Checksum */ 50 uint8_t checksum; 51 /** Length */ 52 uint8_t len; 53 /** Major version */ 54 uint8_t major; 55 /** Minor version */ 56 uint8_t minor; 57 /** Maximum structure size */ 58 uint16_t max; 59 /** Entry point revision */ 60 uint8_t revision; 61 /** Formatted area */ 62 uint8_t formatted[5]; 63 /** DMI Signature */ 64 uint8_t dmi_signature[5]; 65 /** DMI checksum */ 66 uint8_t dmi_checksum; 67 /** Structure table length */ 68 uint16_t smbios_len; 69 /** Structure table address */ 70 uint32_t smbios_address; 71 /** Number of SMBIOS structures */ 72 uint16_t smbios_count; 73 /** BCD revision */ 74 uint8_t bcd_revision; 75 } __attribute__ (( packed )); 76 77 /** An SMBIOS structure header */ 78 struct smbios_header { 79 /** Type */ 80 uint8_t type; 81 /** Length */ 82 uint8_t len; 83 /** Handle */ 84 uint16_t handle; 85 } __attribute__ (( packed )); 86 87 /** SMBIOS structure descriptor */ 88 struct smbios_structure { 89 /** Copy of SMBIOS structure header */ 90 struct smbios_header header; 91 /** Offset of structure within SMBIOS */ 92 size_t offset; 93 /** Length of strings section */ 94 size_t strings_len; 95 }; 96 97 /** SMBIOS system information structure */ 98 struct smbios_system_information { 99 /** SMBIOS structure header */ 100 struct smbios_header header; 101 /** Manufacturer string */ 102 uint8_t manufacturer; 103 /** Product string */ 104 uint8_t product; 105 /** Version string */ 106 uint8_t version; 107 /** Serial number string */ 108 uint8_t serial; 109 /** UUID */ 110 uint8_t uuid[16]; 111 /** Wake-up type */ 112 uint8_t wakeup; 113 } __attribute__ (( packed )); 114 115 /** SMBIOS system information structure type */ 116 #define SMBIOS_TYPE_SYSTEM_INFORMATION 1 117 118 /** SMBIOS enclosure information structure */ 119 struct smbios_enclosure_information { 120 /** SMBIOS structure header */ 121 struct smbios_header header; 122 /** Manufacturer string */ 123 uint8_t manufacturer; 124 /** Type string */ 125 uint8_t type; 126 /** Version string */ 127 uint8_t version; 128 /** Serial number string */ 129 uint8_t serial; 130 /** Asset tag */ 131 uint8_t asset_tag; 132 } __attribute__ (( packed )); 133 134 /** SMBIOS enclosure information structure type */ 135 #define SMBIOS_TYPE_ENCLOSURE_INFORMATION 3 136 137 /** 138 * SMBIOS entry point descriptor 139 * 140 * This contains the information from the SMBIOS entry point that we 141 * care about. 142 */ 143 struct smbios { 144 /** Start of SMBIOS structures */ 145 userptr_t address; 146 /** Length of SMBIOS structures */ 147 size_t len; 148 /** Number of SMBIOS structures */ 149 unsigned int count; 150 }; 151 152 extern int find_smbios ( struct smbios *smbios ); 153 extern int find_smbios_structure ( unsigned int type, 154 struct smbios_structure *structure ); 155 extern int read_smbios_structure ( struct smbios_structure *structure, 156 void *data, size_t len ); 157 extern int read_smbios_string ( struct smbios_structure *structure, 158 unsigned int index, 159 void *data, size_t len ); 160 161 #endif /* _GPXE_SMBIOS_H */ 162
