smbios: Add a module for retrieving SMBIOS information
The following are two use cases from Rajat Jain <rajatjain@juniper.net>:
1) We have a board that boots Linux and this board itself can be plugged
into one of different chassis types. We need to pass different
parameters to the kernel based on the "CHASSIS_TYPE" information
that is passed by the bios in the DMI/SMBIOS tables.
2) We may have a USB stick that can go into multiple boards, and the
exact kernel to be loaded depends on the machine information
(PRODUCT_NAME etc) passed via the DMI.
Signed-off-by: David Michael <fedora.dm0@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
David Michael
Daniel Kiper
parent
261df54f17
commit
688023cd0a
7 changed files with 650 additions and 11 deletions
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@ -3944,6 +3944,7 @@ you forget a command, you can run the command @command{help}
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* sha256sum:: Compute or check SHA256 hash
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* sha256sum:: Compute or check SHA256 hash
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* sha512sum:: Compute or check SHA512 hash
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* sha512sum:: Compute or check SHA512 hash
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* sleep:: Wait for a specified number of seconds
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* sleep:: Wait for a specified number of seconds
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* smbios:: Retrieve SMBIOS information
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* source:: Read a configuration file in same context
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* source:: Read a configuration file in same context
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* test:: Check file types and compare values
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* test:: Check file types and compare values
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* true:: Do nothing, successfully
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* true:: Do nothing, successfully
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@ -5085,6 +5086,80 @@ if timeout was interrupted by @key{ESC}.
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@end deffn
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@end deffn
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@node smbios
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@subsection smbios
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@deffn Command smbios @
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[@option{--type} @var{type}] @
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[@option{--handle} @var{handle}] @
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[@option{--match} @var{match}] @
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(@option{--get-byte} | @option{--get-word} | @option{--get-dword} | @
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@option{--get-qword} | @option{--get-string} | @option{--get-uuid}) @
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@var{offset} @
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[@option{--set} @var{variable}]
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Retrieve SMBIOS information.
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The @command{smbios} command returns the value of a field in an SMBIOS
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structure. The following options determine which structure to select.
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@itemize @bullet
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@item
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Specifying @option{--type} will select structures with a matching
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@var{type}. The type can be any integer from 0 to 255.
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@item
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Specifying @option{--handle} will select structures with a matching
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@var{handle}. The handle can be any integer from 0 to 65535.
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@item
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Specifying @option{--match} will select structure number @var{match} in the
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filtered list of structures; e.g. @code{smbios --type 4 --match 2} will select
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the second Process Information (Type 4) structure. The list is always ordered
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the same as the hardware's SMBIOS table. The match number must be a positive
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integer. If unspecified, the first matching structure will be selected.
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@end itemize
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The remaining options determine which field in the selected SMBIOS structure to
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return. Only one of these options may be specified at a time.
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@itemize @bullet
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@item
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When given @option{--get-byte}, return the value of the byte
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at @var{offset} bytes into the selected SMBIOS structure.
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It will be formatted as an unsigned decimal integer.
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@item
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When given @option{--get-word}, return the value of the word (two bytes)
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at @var{offset} bytes into the selected SMBIOS structure.
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It will be formatted as an unsigned decimal integer.
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@item
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When given @option{--get-dword}, return the value of the dword (four bytes)
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at @var{offset} bytes into the selected SMBIOS structure.
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It will be formatted as an unsigned decimal integer.
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@item
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When given @option{--get-qword}, return the value of the qword (eight bytes)
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at @var{offset} bytes into the selected SMBIOS structure.
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It will be formatted as an unsigned decimal integer.
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@item
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When given @option{--get-string}, return the string with its index found
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at @var{offset} bytes into the selected SMBIOS structure.
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@item
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When given @option{--get-uuid}, return the value of the UUID (sixteen bytes)
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at @var{offset} bytes into the selected SMBIOS structure.
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It will be formatted as lower-case hyphenated hexadecimal digits, with the
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first three fields as little-endian, and the rest printed byte-by-byte.
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@end itemize
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The default action is to print the value of the requested field to the console,
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but a variable name can be specified with @option{--set} to store the value
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instead of printing it.
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For example, this will store and then display the system manufacturer's name.
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@example
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smbios --type 1 --get-string 4 --set system_manufacturer
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echo $system_manufacturer
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@end example
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@end deffn
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@node source
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@node source
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@subsection source
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@subsection source
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@ -1097,6 +1097,21 @@ module = {
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common = commands/sleep.c;
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common = commands/sleep.c;
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};
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};
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module = {
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name = smbios;
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common = commands/smbios.c;
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efi = commands/efi/smbios.c;
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i386_pc = commands/i386/pc/smbios.c;
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i386_coreboot = commands/i386/pc/smbios.c;
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i386_multiboot = commands/i386/pc/smbios.c;
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enable = efi;
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enable = i386_pc;
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enable = i386_coreboot;
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enable = i386_multiboot;
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};
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module = {
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module = {
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name = suspend;
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name = suspend;
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ieee1275 = commands/ieee1275/suspend.c;
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ieee1275 = commands/ieee1275/suspend.c;
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61
grub-core/commands/efi/smbios.c
Normal file
61
grub-core/commands/efi/smbios.c
Normal file
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@ -0,0 +1,61 @@
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/* smbios.c - get smbios tables. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2019 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/smbios.h>
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#include <grub/misc.h>
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#include <grub/efi/efi.h>
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#include <grub/efi/api.h>
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struct grub_smbios_eps *
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grub_machine_smbios_get_eps (void)
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{
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unsigned i;
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static grub_efi_packed_guid_t smbios_guid = GRUB_EFI_SMBIOS_TABLE_GUID;
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for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
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{
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grub_efi_packed_guid_t *guid =
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&grub_efi_system_table->configuration_table[i].vendor_guid;
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if (! grub_memcmp (guid, &smbios_guid, sizeof (grub_efi_packed_guid_t)))
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return (struct grub_smbios_eps *)
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grub_efi_system_table->configuration_table[i].vendor_table;
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}
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return 0;
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}
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struct grub_smbios_eps3 *
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grub_machine_smbios_get_eps3 (void)
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{
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unsigned i;
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static grub_efi_packed_guid_t smbios3_guid = GRUB_EFI_SMBIOS3_TABLE_GUID;
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for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
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{
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grub_efi_packed_guid_t *guid =
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&grub_efi_system_table->configuration_table[i].vendor_guid;
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if (! grub_memcmp (guid, &smbios3_guid, sizeof (grub_efi_packed_guid_t)))
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return (struct grub_smbios_eps3 *)
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grub_efi_system_table->configuration_table[i].vendor_table;
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}
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return 0;
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}
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52
grub-core/commands/i386/pc/smbios.c
Normal file
52
grub-core/commands/i386/pc/smbios.c
Normal file
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@ -0,0 +1,52 @@
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/* smbios.c - get smbios tables. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2019 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/acpi.h>
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#include <grub/smbios.h>
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#include <grub/misc.h>
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struct grub_smbios_eps *
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grub_machine_smbios_get_eps (void)
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{
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grub_uint8_t *ptr;
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grub_dprintf ("smbios", "Looking for SMBIOS EPS. Scanning BIOS\n");
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for (ptr = (grub_uint8_t *) 0xf0000; ptr < (grub_uint8_t *) 0x100000; ptr += 16)
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if (grub_memcmp (ptr, "_SM_", 4) == 0
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&& grub_byte_checksum (ptr, sizeof (struct grub_smbios_eps)) == 0)
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return (struct grub_smbios_eps *) ptr;
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return 0;
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}
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struct grub_smbios_eps3 *
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grub_machine_smbios_get_eps3 (void)
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{
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grub_uint8_t *ptr;
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grub_dprintf ("smbios", "Looking for SMBIOS3 EPS. Scanning BIOS\n");
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for (ptr = (grub_uint8_t *) 0xf0000; ptr < (grub_uint8_t *) 0x100000; ptr += 16)
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if (grub_memcmp (ptr, "_SM3_", 5) == 0
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&& grub_byte_checksum (ptr, sizeof (struct grub_smbios_eps3)) == 0)
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return (struct grub_smbios_eps3 *) ptr;
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return 0;
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}
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374
grub-core/commands/smbios.c
Normal file
374
grub-core/commands/smbios.c
Normal file
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@ -0,0 +1,374 @@
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/* smbios.c - retrieve smbios information. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2019 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/env.h>
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#include <grub/extcmd.h>
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#include <grub/i18n.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/smbios.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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/* Abstract useful values found in either the SMBIOS3 or SMBIOS EPS. */
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static struct {
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grub_addr_t start;
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grub_addr_t end;
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grub_uint16_t structures;
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} table_desc;
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static grub_extcmd_t cmd;
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/* Locate the SMBIOS entry point structure depending on the hardware. */
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struct grub_smbios_eps *
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grub_smbios_get_eps (void)
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{
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static struct grub_smbios_eps *eps = NULL;
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if (eps != NULL)
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return eps;
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eps = grub_machine_smbios_get_eps ();
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return eps;
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}
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/* Locate the SMBIOS3 entry point structure depending on the hardware. */
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static struct grub_smbios_eps3 *
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grub_smbios_get_eps3 (void)
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{
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static struct grub_smbios_eps3 *eps = NULL;
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if (eps != NULL)
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return eps;
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eps = grub_machine_smbios_get_eps3 ();
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return eps;
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}
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/*
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* These functions convert values from the various SMBIOS structure field types
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* into a string formatted to be returned to the user. They expect that the
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* structure and offset were already validated. When the requested data is
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* successfully retrieved and formatted, the pointer to the string is returned;
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* otherwise, NULL is returned on failure. Don't free the result.
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*/
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static const char *
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grub_smbios_format_byte (const grub_uint8_t *structure, grub_uint8_t offset)
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{
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static char buffer[sizeof ("255")];
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grub_snprintf (buffer, sizeof (buffer), "%u", structure[offset]);
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return (const char *)buffer;
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}
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static const char *
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grub_smbios_format_word (const grub_uint8_t *structure, grub_uint8_t offset)
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{
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static char buffer[sizeof ("65535")];
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grub_uint16_t value = grub_get_unaligned16 (structure + offset);
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grub_snprintf (buffer, sizeof (buffer), "%u", value);
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return (const char *)buffer;
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}
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static const char *
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grub_smbios_format_dword (const grub_uint8_t *structure, grub_uint8_t offset)
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{
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static char buffer[sizeof ("4294967295")];
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grub_uint32_t value = grub_get_unaligned32 (structure + offset);
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grub_snprintf (buffer, sizeof (buffer), "%" PRIuGRUB_UINT32_T, value);
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return (const char *)buffer;
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}
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static const char *
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grub_smbios_format_qword (const grub_uint8_t *structure, grub_uint8_t offset)
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{
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static char buffer[sizeof ("18446744073709551615")];
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grub_uint64_t value = grub_get_unaligned64 (structure + offset);
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grub_snprintf (buffer, sizeof (buffer), "%" PRIuGRUB_UINT64_T, value);
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return (const char *)buffer;
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}
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static const char *
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grub_smbios_get_string (const grub_uint8_t *structure, grub_uint8_t offset)
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{
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const grub_uint8_t *ptr = structure + structure[1];
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||||||
|
const grub_uint8_t *table_end = (const grub_uint8_t *)table_desc.end;
|
||||||
|
const grub_uint8_t referenced_string_number = structure[offset];
|
||||||
|
grub_uint8_t i;
|
||||||
|
|
||||||
|
/* A string referenced with zero is interpreted as unset. */
|
||||||
|
if (referenced_string_number == 0)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
|
/* Search the string set. */
|
||||||
|
for (i = 1; *ptr != 0 && ptr < table_end; i++)
|
||||||
|
if (i == referenced_string_number)
|
||||||
|
{
|
||||||
|
const char *str = (const char *)ptr;
|
||||||
|
while (*ptr++ != 0)
|
||||||
|
if (ptr >= table_end)
|
||||||
|
return NULL; /* The string isn't terminated. */
|
||||||
|
return str;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
while (*ptr++ != 0 && ptr < table_end);
|
||||||
|
|
||||||
|
/* The string number is greater than the number of strings in the set. */
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const char *
|
||||||
|
grub_smbios_format_uuid (const grub_uint8_t *structure, grub_uint8_t offset)
|
||||||
|
{
|
||||||
|
static char buffer[sizeof ("ffffffff-ffff-ffff-ffff-ffffffffffff")];
|
||||||
|
const grub_uint8_t *f = structure + offset; /* little-endian fields */
|
||||||
|
const grub_uint8_t *g = f + 8; /* byte-by-byte fields */
|
||||||
|
|
||||||
|
grub_snprintf (buffer, sizeof (buffer),
|
||||||
|
"%02x%02x%02x%02x-%02x%02x-%02x%02x-"
|
||||||
|
"%02x%02x-%02x%02x%02x%02x%02x%02x",
|
||||||
|
f[3], f[2], f[1], f[0], f[5], f[4], f[7], f[6],
|
||||||
|
g[0], g[1], g[2], g[3], g[4], g[5], g[6], g[7]);
|
||||||
|
|
||||||
|
return (const char *)buffer;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* List the field formatting functions and the number of bytes they need. */
|
||||||
|
static const struct {
|
||||||
|
const char *(*format) (const grub_uint8_t *structure, grub_uint8_t offset);
|
||||||
|
grub_uint8_t field_length;
|
||||||
|
} field_extractors[] = {
|
||||||
|
{grub_smbios_format_byte, 1},
|
||||||
|
{grub_smbios_format_word, 2},
|
||||||
|
{grub_smbios_format_dword, 4},
|
||||||
|
{grub_smbios_format_qword, 8},
|
||||||
|
{grub_smbios_get_string, 1},
|
||||||
|
{grub_smbios_format_uuid, 16}
|
||||||
|
};
|
||||||
|
|
||||||
|
/* List command options, with structure field getters ordered as above. */
|
||||||
|
#define FIRST_GETTER_OPT (3)
|
||||||
|
#define SETTER_OPT (FIRST_GETTER_OPT + ARRAY_SIZE(field_extractors))
|
||||||
|
|
||||||
|
static const struct grub_arg_option options[] = {
|
||||||
|
{"type", 't', 0, N_("Match structures with the given type."),
|
||||||
|
N_("type"), ARG_TYPE_INT},
|
||||||
|
{"handle", 'h', 0, N_("Match structures with the given handle."),
|
||||||
|
N_("handle"), ARG_TYPE_INT},
|
||||||
|
{"match", 'm', 0, N_("Select a structure when several match."),
|
||||||
|
N_("match"), ARG_TYPE_INT},
|
||||||
|
{"get-byte", 'b', 0, N_("Get the byte's value at the given offset."),
|
||||||
|
N_("offset"), ARG_TYPE_INT},
|
||||||
|
{"get-word", 'w', 0, N_("Get two bytes' value at the given offset."),
|
||||||
|
N_("offset"), ARG_TYPE_INT},
|
||||||
|
{"get-dword", 'd', 0, N_("Get four bytes' value at the given offset."),
|
||||||
|
N_("offset"), ARG_TYPE_INT},
|
||||||
|
{"get-qword", 'q', 0, N_("Get eight bytes' value at the given offset."),
|
||||||
|
N_("offset"), ARG_TYPE_INT},
|
||||||
|
{"get-string", 's', 0, N_("Get the string specified at the given offset."),
|
||||||
|
N_("offset"), ARG_TYPE_INT},
|
||||||
|
{"get-uuid", 'u', 0, N_("Get the UUID's value at the given offset."),
|
||||||
|
N_("offset"), ARG_TYPE_INT},
|
||||||
|
{"set", '\0', 0, N_("Store the value in the given variable name."),
|
||||||
|
N_("variable"), ARG_TYPE_STRING},
|
||||||
|
{0, 0, 0, 0, 0, 0}
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Return a matching SMBIOS structure.
|
||||||
|
*
|
||||||
|
* This method can use up to three criteria for selecting a structure:
|
||||||
|
* - The "type" field (use -1 to ignore)
|
||||||
|
* - The "handle" field (use -1 to ignore)
|
||||||
|
* - Which to return if several match (use 0 to ignore)
|
||||||
|
*
|
||||||
|
* The return value is a pointer to the first matching structure. If no
|
||||||
|
* structures match the given parameters, NULL is returned.
|
||||||
|
*/
|
||||||
|
static const grub_uint8_t *
|
||||||
|
grub_smbios_match_structure (const grub_int16_t type,
|
||||||
|
const grub_int32_t handle,
|
||||||
|
const grub_uint16_t match)
|
||||||
|
{
|
||||||
|
const grub_uint8_t *ptr = (const grub_uint8_t *)table_desc.start;
|
||||||
|
const grub_uint8_t *table_end = (const grub_uint8_t *)table_desc.end;
|
||||||
|
grub_uint16_t structures = table_desc.structures;
|
||||||
|
grub_uint16_t structure_count = 0;
|
||||||
|
grub_uint16_t matches = 0;
|
||||||
|
|
||||||
|
while (ptr < table_end
|
||||||
|
&& ptr[1] >= 4 /* Valid structures include the 4-byte header. */
|
||||||
|
&& (structure_count++ < structures || structures == 0))
|
||||||
|
{
|
||||||
|
grub_uint16_t structure_handle = grub_get_unaligned16 (ptr + 2);
|
||||||
|
grub_uint8_t structure_type = ptr[0];
|
||||||
|
|
||||||
|
if ((handle < 0 || handle == structure_handle)
|
||||||
|
&& (type < 0 || type == structure_type)
|
||||||
|
&& (match == 0 || match == ++matches))
|
||||||
|
return ptr;
|
||||||
|
else
|
||||||
|
{
|
||||||
|
ptr += ptr[1];
|
||||||
|
while ((*ptr++ != 0 || *ptr++ != 0) && ptr < table_end);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (structure_type == GRUB_SMBIOS_TYPE_END_OF_TABLE)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return NULL;
|
||||||
|
}
|
||||||
|
|
||||||
|
static grub_err_t
|
||||||
|
grub_cmd_smbios (grub_extcmd_context_t ctxt,
|
||||||
|
int argc __attribute__ ((unused)),
|
||||||
|
char **argv __attribute__ ((unused)))
|
||||||
|
{
|
||||||
|
struct grub_arg_list *state = ctxt->state;
|
||||||
|
|
||||||
|
grub_int16_t type = -1;
|
||||||
|
grub_int32_t handle = -1;
|
||||||
|
grub_uint16_t match = 0;
|
||||||
|
grub_uint8_t offset = 0;
|
||||||
|
|
||||||
|
const grub_uint8_t *structure;
|
||||||
|
const char *value;
|
||||||
|
grub_int32_t option;
|
||||||
|
grub_int8_t field_type = -1;
|
||||||
|
grub_uint8_t i;
|
||||||
|
|
||||||
|
if (table_desc.start == 0)
|
||||||
|
return grub_error (GRUB_ERR_IO,
|
||||||
|
N_("the SMBIOS entry point structure was not found"));
|
||||||
|
|
||||||
|
/* Read the given filtering options. */
|
||||||
|
if (state[0].set)
|
||||||
|
{
|
||||||
|
option = grub_strtol (state[0].arg, NULL, 0);
|
||||||
|
if (option < 0 || option > 255)
|
||||||
|
return grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||||||
|
N_("the type must be between 0 and 255"));
|
||||||
|
type = (grub_int16_t)option;
|
||||||
|
}
|
||||||
|
if (state[1].set)
|
||||||
|
{
|
||||||
|
option = grub_strtol (state[1].arg, NULL, 0);
|
||||||
|
if (option < 0 || option > 65535)
|
||||||
|
return grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||||||
|
N_("the handle must be between 0 and 65535"));
|
||||||
|
handle = (grub_int32_t)option;
|
||||||
|
}
|
||||||
|
if (state[2].set)
|
||||||
|
{
|
||||||
|
option = grub_strtol (state[2].arg, NULL, 0);
|
||||||
|
if (option <= 0 || option > 65535)
|
||||||
|
return grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||||||
|
N_("the match must be a positive integer"));
|
||||||
|
match = (grub_uint16_t)option;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Determine the data type of the structure field to retrieve. */
|
||||||
|
for (i = 0; i < ARRAY_SIZE(field_extractors); i++)
|
||||||
|
if (state[FIRST_GETTER_OPT + i].set)
|
||||||
|
{
|
||||||
|
if (field_type >= 0)
|
||||||
|
return grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||||||
|
N_("only one --get option is usable at a time"));
|
||||||
|
field_type = i;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Require a choice of a structure field to return. */
|
||||||
|
if (field_type < 0)
|
||||||
|
return grub_error (GRUB_ERR_BAD_ARGUMENT,
|
||||||
|
N_("one of the --get options is required"));
|
||||||
|
|
||||||
|
/* Locate a matching SMBIOS structure. */
|
||||||
|
structure = grub_smbios_match_structure (type, handle, match);
|
||||||
|
if (structure == NULL)
|
||||||
|
return grub_error (GRUB_ERR_IO,
|
||||||
|
N_("no structure matched the given options"));
|
||||||
|
|
||||||
|
/* Ensure the requested byte offset is inside the structure. */
|
||||||
|
option = grub_strtol (state[FIRST_GETTER_OPT + field_type].arg, NULL, 0);
|
||||||
|
if (option < 0 || option >= structure[1])
|
||||||
|
return grub_error (GRUB_ERR_OUT_OF_RANGE,
|
||||||
|
N_("the given offset is outside the structure"));
|
||||||
|
|
||||||
|
/* Ensure the requested data type at the offset is inside the structure. */
|
||||||
|
offset = (grub_uint8_t)option;
|
||||||
|
if (offset + field_extractors[field_type].field_length > structure[1])
|
||||||
|
return grub_error (GRUB_ERR_OUT_OF_RANGE,
|
||||||
|
N_("the field ends outside the structure"));
|
||||||
|
|
||||||
|
/* Format the requested structure field into a readable string. */
|
||||||
|
value = field_extractors[field_type].format (structure, offset);
|
||||||
|
if (value == NULL)
|
||||||
|
return grub_error (GRUB_ERR_IO,
|
||||||
|
N_("failed to retrieve the structure field"));
|
||||||
|
|
||||||
|
/* Store or print the formatted value. */
|
||||||
|
if (state[SETTER_OPT].set)
|
||||||
|
grub_env_set (state[SETTER_OPT].arg, value);
|
||||||
|
else
|
||||||
|
grub_printf ("%s\n", value);
|
||||||
|
|
||||||
|
return GRUB_ERR_NONE;
|
||||||
|
}
|
||||||
|
|
||||||
|
GRUB_MOD_INIT(smbios)
|
||||||
|
{
|
||||||
|
struct grub_smbios_eps3 *eps3;
|
||||||
|
struct grub_smbios_eps *eps;
|
||||||
|
|
||||||
|
if ((eps3 = grub_smbios_get_eps3 ()))
|
||||||
|
{
|
||||||
|
table_desc.start = (grub_addr_t)eps3->table_address;
|
||||||
|
table_desc.end = table_desc.start + eps3->maximum_table_length;
|
||||||
|
table_desc.structures = 0; /* SMBIOS3 drops the structure count. */
|
||||||
|
}
|
||||||
|
else if ((eps = grub_smbios_get_eps ()))
|
||||||
|
{
|
||||||
|
table_desc.start = (grub_addr_t)eps->intermediate.table_address;
|
||||||
|
table_desc.end = table_desc.start + eps->intermediate.table_length;
|
||||||
|
table_desc.structures = eps->intermediate.structures;
|
||||||
|
}
|
||||||
|
|
||||||
|
cmd = grub_register_extcmd ("smbios", grub_cmd_smbios, 0,
|
||||||
|
N_("[-t type] [-h handle] [-m match] "
|
||||||
|
"(-b|-w|-d|-q|-s|-u) offset "
|
||||||
|
"[--set variable]"),
|
||||||
|
N_("Retrieve SMBIOS information."), options);
|
||||||
|
}
|
||||||
|
|
||||||
|
GRUB_MOD_FINI(smbios)
|
||||||
|
{
|
||||||
|
grub_unregister_extcmd (cmd);
|
||||||
|
}
|
||||||
|
|
@ -22,11 +22,11 @@
|
||||||
#include <grub/misc.h>
|
#include <grub/misc.h>
|
||||||
#include <grub/mm.h>
|
#include <grub/mm.h>
|
||||||
#include <grub/acpi.h>
|
#include <grub/acpi.h>
|
||||||
|
#include <grub/smbios.h>
|
||||||
|
|
||||||
grub_err_t
|
grub_err_t
|
||||||
grub_machine_efiemu_init_tables (void)
|
grub_machine_efiemu_init_tables (void)
|
||||||
{
|
{
|
||||||
grub_uint8_t *ptr;
|
|
||||||
void *table;
|
void *table;
|
||||||
grub_err_t err;
|
grub_err_t err;
|
||||||
grub_efi_guid_t smbios = GRUB_EFI_SMBIOS_TABLE_GUID;
|
grub_efi_guid_t smbios = GRUB_EFI_SMBIOS_TABLE_GUID;
|
||||||
|
|
@ -57,17 +57,10 @@ grub_machine_efiemu_init_tables (void)
|
||||||
if (err)
|
if (err)
|
||||||
return err;
|
return err;
|
||||||
}
|
}
|
||||||
|
table = grub_smbios_get_eps ();
|
||||||
for (ptr = (grub_uint8_t *) 0xf0000; ptr < (grub_uint8_t *) 0x100000;
|
if (table)
|
||||||
ptr += 16)
|
|
||||||
if (grub_memcmp (ptr, "_SM_", 4) == 0
|
|
||||||
&& grub_byte_checksum (ptr, *(ptr + 5)) == 0)
|
|
||||||
break;
|
|
||||||
|
|
||||||
if (ptr < (grub_uint8_t *) 0x100000)
|
|
||||||
{
|
{
|
||||||
grub_dprintf ("efiemu", "Registering SMBIOS\n");
|
err = grub_efiemu_register_configuration_table (smbios, 0, 0, table);
|
||||||
err = grub_efiemu_register_configuration_table (smbios, 0, 0, ptr);
|
|
||||||
if (err)
|
if (err)
|
||||||
return err;
|
return err;
|
||||||
}
|
}
|
||||||
|
|
|
||||||
69
include/grub/smbios.h
Normal file
69
include/grub/smbios.h
Normal file
|
|
@ -0,0 +1,69 @@
|
||||||
|
/*
|
||||||
|
* GRUB -- GRand Unified Bootloader
|
||||||
|
* Copyright (C) 2019 Free Software Foundation, Inc.
|
||||||
|
*
|
||||||
|
* GRUB is free software: you can redistribute it and/or modify
|
||||||
|
* it under the terms of the GNU General Public License as published by
|
||||||
|
* the Free Software Foundation, either version 3 of the License, or
|
||||||
|
* (at your option) any later version.
|
||||||
|
*
|
||||||
|
* GRUB is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
* GNU General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public License
|
||||||
|
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef GRUB_SMBIOS_HEADER
|
||||||
|
#define GRUB_SMBIOS_HEADER 1
|
||||||
|
|
||||||
|
#include <grub/symbol.h>
|
||||||
|
#include <grub/types.h>
|
||||||
|
|
||||||
|
#define GRUB_SMBIOS_TYPE_END_OF_TABLE ((grub_uint8_t)127)
|
||||||
|
|
||||||
|
struct grub_smbios_ieps
|
||||||
|
{
|
||||||
|
grub_uint8_t anchor[5]; /* "_DMI_" */
|
||||||
|
grub_uint8_t checksum;
|
||||||
|
grub_uint16_t table_length;
|
||||||
|
grub_uint32_t table_address;
|
||||||
|
grub_uint16_t structures;
|
||||||
|
grub_uint8_t revision;
|
||||||
|
} GRUB_PACKED;
|
||||||
|
|
||||||
|
struct grub_smbios_eps
|
||||||
|
{
|
||||||
|
grub_uint8_t anchor[4]; /* "_SM_" */
|
||||||
|
grub_uint8_t checksum;
|
||||||
|
grub_uint8_t length; /* 0x1f */
|
||||||
|
grub_uint8_t version_major;
|
||||||
|
grub_uint8_t version_minor;
|
||||||
|
grub_uint16_t maximum_structure_size;
|
||||||
|
grub_uint8_t revision;
|
||||||
|
grub_uint8_t formatted[5];
|
||||||
|
struct grub_smbios_ieps intermediate;
|
||||||
|
} GRUB_PACKED;
|
||||||
|
|
||||||
|
struct grub_smbios_eps3
|
||||||
|
{
|
||||||
|
grub_uint8_t anchor[5]; /* "_SM3_" */
|
||||||
|
grub_uint8_t checksum;
|
||||||
|
grub_uint8_t length; /* 0x18 */
|
||||||
|
grub_uint8_t version_major;
|
||||||
|
grub_uint8_t version_minor;
|
||||||
|
grub_uint8_t docrev;
|
||||||
|
grub_uint8_t revision;
|
||||||
|
grub_uint8_t reserved;
|
||||||
|
grub_uint32_t maximum_table_length;
|
||||||
|
grub_uint64_t table_address;
|
||||||
|
} GRUB_PACKED;
|
||||||
|
|
||||||
|
extern struct grub_smbios_eps *grub_machine_smbios_get_eps (void);
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extern struct grub_smbios_eps3 *grub_machine_smbios_get_eps3 (void);
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extern struct grub_smbios_eps *EXPORT_FUNC (grub_smbios_get_eps) (void);
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|
||||||
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#endif /* ! GRUB_SMBIOS_HEADER */
|
||||||
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Reference in a new issue