mirror of https://github.com/acidanthera/audk.git
129 lines
3.4 KiB
C
129 lines
3.4 KiB
C
/** @file
|
|
|
|
A hook-in library for MdeModulePkg/Universal/SmbiosDxe, in order to set
|
|
gEfiMdeModulePkgTokenSpaceGuid.PcdSmbiosVersion (and possibly other PCDs)
|
|
just before SmbiosDxe consumes them.
|
|
|
|
Copyright (C) 2013, 2015, Red Hat, Inc.
|
|
Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>
|
|
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
#include <IndustryStandard/SmBios.h>
|
|
|
|
#include <Base.h>
|
|
#include <Library/BaseMemoryLib.h>
|
|
#include <Library/DebugLib.h>
|
|
#include <Library/PcdLib.h>
|
|
#include <Library/QemuFwCfgLib.h>
|
|
|
|
typedef union {
|
|
SMBIOS_TABLE_ENTRY_POINT V2;
|
|
SMBIOS_TABLE_3_0_ENTRY_POINT V3;
|
|
} QEMU_SMBIOS_ANCHOR;
|
|
|
|
RETURN_STATUS
|
|
EFIAPI
|
|
DetectSmbiosVersion (
|
|
VOID
|
|
)
|
|
{
|
|
FIRMWARE_CONFIG_ITEM Anchor, Tables;
|
|
UINTN AnchorSize, TablesSize;
|
|
QEMU_SMBIOS_ANCHOR QemuAnchor;
|
|
UINT16 SmbiosVersion;
|
|
RETURN_STATUS PcdStatus;
|
|
|
|
if (PcdGetBool (PcdQemuSmbiosValidated)) {
|
|
//
|
|
// Some other module, linked against this library, has already performed
|
|
// the task at hand. This should never happen, but it's easy to handle;
|
|
// just exit early.
|
|
//
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
if (RETURN_ERROR (
|
|
QemuFwCfgFindFile (
|
|
"etc/smbios/smbios-anchor",
|
|
&Anchor,
|
|
&AnchorSize
|
|
)
|
|
) ||
|
|
RETURN_ERROR (
|
|
QemuFwCfgFindFile (
|
|
"etc/smbios/smbios-tables",
|
|
&Tables,
|
|
&TablesSize
|
|
)
|
|
) ||
|
|
(TablesSize == 0))
|
|
{
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
QemuFwCfgSelectItem (Anchor);
|
|
|
|
switch (AnchorSize) {
|
|
case sizeof QemuAnchor.V2:
|
|
QemuFwCfgReadBytes (AnchorSize, &QemuAnchor);
|
|
|
|
if ((QemuAnchor.V2.MajorVersion != 2) ||
|
|
(QemuAnchor.V2.TableLength != TablesSize) ||
|
|
(CompareMem (QemuAnchor.V2.AnchorString, "_SM_", 4) != 0) ||
|
|
(CompareMem (QemuAnchor.V2.IntermediateAnchorString, "_DMI_", 5) != 0))
|
|
{
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
SmbiosVersion = (UINT16)(QemuAnchor.V2.MajorVersion << 8 |
|
|
QemuAnchor.V2.MinorVersion);
|
|
break;
|
|
|
|
case sizeof QemuAnchor.V3:
|
|
QemuFwCfgReadBytes (AnchorSize, &QemuAnchor);
|
|
|
|
if ((QemuAnchor.V3.MajorVersion != 3) ||
|
|
(QemuAnchor.V3.TableMaximumSize != TablesSize) ||
|
|
(CompareMem (QemuAnchor.V3.AnchorString, "_SM3_", 5) != 0))
|
|
{
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
SmbiosVersion = (UINT16)(QemuAnchor.V3.MajorVersion << 8 |
|
|
QemuAnchor.V3.MinorVersion);
|
|
|
|
DEBUG ((
|
|
DEBUG_INFO,
|
|
"%a: SMBIOS 3.x DocRev from QEMU: 0x%02x\n",
|
|
__func__,
|
|
QemuAnchor.V3.DocRev
|
|
));
|
|
PcdStatus = PcdSet8S (PcdSmbiosDocRev, QemuAnchor.V3.DocRev);
|
|
ASSERT_RETURN_ERROR (PcdStatus);
|
|
break;
|
|
|
|
default:
|
|
return RETURN_SUCCESS;
|
|
}
|
|
|
|
DEBUG ((
|
|
DEBUG_INFO,
|
|
"%a: SMBIOS version from QEMU: 0x%04x\n",
|
|
__func__,
|
|
SmbiosVersion
|
|
));
|
|
PcdStatus = PcdSet16S (PcdSmbiosVersion, SmbiosVersion);
|
|
ASSERT_RETURN_ERROR (PcdStatus);
|
|
|
|
//
|
|
// SMBIOS platform drivers can now fetch and install
|
|
// "etc/smbios/smbios-tables" from QEMU.
|
|
//
|
|
PcdStatus = PcdSetBoolS (PcdQemuSmbiosValidated, TRUE);
|
|
ASSERT_RETURN_ERROR (PcdStatus);
|
|
return RETURN_SUCCESS;
|
|
}
|