3 A hook-in library for MdeModulePkg/Universal/SmbiosDxe, in order to set
4 gEfiMdeModulePkgTokenSpaceGuid.PcdSmbiosVersion (and possibly other PCDs)
5 just before SmbiosDxe consumes them.
7 Copyright (C) 2013, 2015, Red Hat, Inc.
8 Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
10 SPDX-License-Identifier: BSD-2-Clause-Patent
14 #include <IndustryStandard/SmBios.h>
17 #include <Library/BaseMemoryLib.h>
18 #include <Library/DebugLib.h>
19 #include <Library/PcdLib.h>
20 #include <Library/QemuFwCfgLib.h>
23 SMBIOS_TABLE_ENTRY_POINT V2
;
24 SMBIOS_TABLE_3_0_ENTRY_POINT V3
;
33 FIRMWARE_CONFIG_ITEM Anchor
, Tables
;
34 UINTN AnchorSize
, TablesSize
;
35 QEMU_SMBIOS_ANCHOR QemuAnchor
;
37 RETURN_STATUS PcdStatus
;
39 if (PcdGetBool (PcdQemuSmbiosValidated
)) {
41 // Some other module, linked against this library, has already performed
42 // the task at hand. This should never happen, but it's easy to handle;
45 return RETURN_SUCCESS
;
50 "etc/smbios/smbios-anchor",
57 "etc/smbios/smbios-tables",
64 return RETURN_SUCCESS
;
67 QemuFwCfgSelectItem (Anchor
);
70 case sizeof QemuAnchor
.V2
:
71 QemuFwCfgReadBytes (AnchorSize
, &QemuAnchor
);
73 if ((QemuAnchor
.V2
.MajorVersion
!= 2) ||
74 (QemuAnchor
.V2
.TableLength
!= TablesSize
) ||
75 (CompareMem (QemuAnchor
.V2
.AnchorString
, "_SM_", 4) != 0) ||
76 (CompareMem (QemuAnchor
.V2
.IntermediateAnchorString
, "_DMI_", 5) != 0))
78 return RETURN_SUCCESS
;
81 SmbiosVersion
= (UINT16
)(QemuAnchor
.V2
.MajorVersion
<< 8 |
82 QemuAnchor
.V2
.MinorVersion
);
85 case sizeof QemuAnchor
.V3
:
86 QemuFwCfgReadBytes (AnchorSize
, &QemuAnchor
);
88 if ((QemuAnchor
.V3
.MajorVersion
!= 3) ||
89 (QemuAnchor
.V3
.TableMaximumSize
!= TablesSize
) ||
90 (CompareMem (QemuAnchor
.V3
.AnchorString
, "_SM3_", 5) != 0))
92 return RETURN_SUCCESS
;
95 SmbiosVersion
= (UINT16
)(QemuAnchor
.V3
.MajorVersion
<< 8 |
96 QemuAnchor
.V3
.MinorVersion
);
100 "%a: SMBIOS 3.x DocRev from QEMU: 0x%02x\n",
104 PcdStatus
= PcdSet8S (PcdSmbiosDocRev
, QemuAnchor
.V3
.DocRev
);
105 ASSERT_RETURN_ERROR (PcdStatus
);
109 return RETURN_SUCCESS
;
114 "%a: SMBIOS version from QEMU: 0x%04x\n",
118 PcdStatus
= PcdSet16S (PcdSmbiosVersion
, SmbiosVersion
);
119 ASSERT_RETURN_ERROR (PcdStatus
);
122 // SMBIOS platform drivers can now fetch and install
123 // "etc/smbios/smbios-tables" from QEMU.
125 PcdStatus
= PcdSetBoolS (PcdQemuSmbiosValidated
, TRUE
);
126 ASSERT_RETURN_ERROR (PcdStatus
);
127 return RETURN_SUCCESS
;