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authorjljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524>2011-08-13 22:54:37 +0000
committerjljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524>2011-08-13 22:54:37 +0000
commitfb511817629e3c26a29ab154319a8edcc9ce2bc1 (patch)
tree7368b8fda11d1c07f9207071a334699460219f71 /OvmfPkg
parentd5aff67358b5a6c4b22e20019abdfd235fafd006 (diff)
downloadedk2-platforms-fb511817629e3c26a29ab154319a8edcc9ce2bc1.tar.xz
OvmfPkg/SmbiosPlatformDxe: Add OVMF SMBIOS driver (with Xen support)
Locates Xen SMBIOS data and installs it using the SMBIOS protocol. Signed-off-by: gavinguan Reviewed-by: Andrei Warkentin <andreiw@motorola.com> Signed-off-by: jljusten git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12125 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg')
-rw-r--r--OvmfPkg/OvmfPkgIa32.dsc7
-rw-r--r--OvmfPkg/OvmfPkgIa32.fdf4
-rw-r--r--OvmfPkg/OvmfPkgIa32X64.dsc7
-rw-r--r--OvmfPkg/OvmfPkgIa32X64.fdf4
-rw-r--r--OvmfPkg/OvmfPkgX64.dsc7
-rw-r--r--OvmfPkg/OvmfPkgX64.fdf4
-rw-r--r--OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c170
-rw-r--r--OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h56
-rw-r--r--OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf57
-rw-r--r--OvmfPkg/SmbiosPlatformDxe/Xen.c63
10 files changed, 373 insertions, 6 deletions
diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index d3d4a470f0..8a5b3524ca 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -302,7 +302,6 @@
MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf
MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
- MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf
UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -367,6 +366,12 @@
IntelFrameworkModulePkg/Bus/Isa/IsaFloppyDxe/IsaFloppyDxe.inf
#
+ # SMBIOS Support
+ #
+ MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+ OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+
+ #
# ACPI Support
#
MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
diff --git a/OvmfPkg/OvmfPkgIa32.fdf b/OvmfPkg/OvmfPkgIa32.fdf
index ed152021a3..04e5b65bec 100644
--- a/OvmfPkg/OvmfPkgIa32.fdf
+++ b/OvmfPkg/OvmfPkgIa32.fdf
@@ -152,7 +152,6 @@ INF MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
INF MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
INF MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf
INF MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
-INF MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
INF PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf
INF UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
INF UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -198,6 +197,9 @@ INF IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/IsaSerialDxe.inf
INF IntelFrameworkModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2keyboardDxe.inf
INF IntelFrameworkModulePkg/Bus/Isa/IsaFloppyDxe/IsaFloppyDxe.inf
+INF MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+INF OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+
INF MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
INF MdeModulePkg/Universal/Acpi/AcpiPlatformDxe/AcpiPlatformDxe.inf
INF RuleOverride=ACPITABLE OvmfPkg/AcpiTables/AcpiTables.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 77095b3837..98d3a29248 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -303,7 +303,6 @@
MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf
MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
- MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf
UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -368,6 +367,12 @@
IntelFrameworkModulePkg/Bus/Isa/IsaFloppyDxe/IsaFloppyDxe.inf
#
+ # SMBIOS Support
+ #
+ MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+ OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+
+ #
# ACPI Support
#
MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf
index df212659ba..0efd16837b 100644
--- a/OvmfPkg/OvmfPkgIa32X64.fdf
+++ b/OvmfPkg/OvmfPkgIa32X64.fdf
@@ -152,7 +152,6 @@ INF MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
INF MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
INF MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf
INF MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
-INF MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
INF PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf
INF UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
INF UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -198,6 +197,9 @@ INF IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/IsaSerialDxe.inf
INF IntelFrameworkModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2keyboardDxe.inf
INF IntelFrameworkModulePkg/Bus/Isa/IsaFloppyDxe/IsaFloppyDxe.inf
+INF MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+INF OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+
INF MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
INF MdeModulePkg/Universal/Acpi/AcpiPlatformDxe/AcpiPlatformDxe.inf
INF RuleOverride=ACPITABLE OvmfPkg/AcpiTables/AcpiTables.inf
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index 3604a322df..9117136538 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -302,7 +302,6 @@
MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf
MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
- MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf
UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -367,6 +366,12 @@
IntelFrameworkModulePkg/Bus/Isa/IsaFloppyDxe/IsaFloppyDxe.inf
#
+ # SMBIOS Support
+ #
+ MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+ OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+
+ #
# ACPI Support
#
MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
diff --git a/OvmfPkg/OvmfPkgX64.fdf b/OvmfPkg/OvmfPkgX64.fdf
index f0388b12c2..a9241ef7dc 100644
--- a/OvmfPkg/OvmfPkgX64.fdf
+++ b/OvmfPkg/OvmfPkgX64.fdf
@@ -152,7 +152,6 @@ INF MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
INF MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
INF MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf
INF MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
-INF MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
INF PcAtChipsetPkg/8259InterruptControllerDxe/8259.inf
INF UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
INF UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -198,6 +197,9 @@ INF IntelFrameworkModulePkg/Bus/Isa/IsaSerialDxe/IsaSerialDxe.inf
INF IntelFrameworkModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2keyboardDxe.inf
INF IntelFrameworkModulePkg/Bus/Isa/IsaFloppyDxe/IsaFloppyDxe.inf
+INF MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+INF OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+
INF MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
INF MdeModulePkg/Universal/Acpi/AcpiPlatformDxe/AcpiPlatformDxe.inf
INF RuleOverride=ACPITABLE OvmfPkg/AcpiTables/AcpiTables.inf
diff --git a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c
new file mode 100644
index 0000000000..dc84c3ac20
--- /dev/null
+++ b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c
@@ -0,0 +1,170 @@
+/** @file
+ This driver installs SMBIOS information for OVMF
+
+ Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
+ Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "SmbiosPlatformDxe.h"
+
+
+/**
+ Validates the SMBIOS entry point structure
+
+ @param EntryPointStructure SMBIOS entry point structure
+
+ @retval TRUE The entry point structure is valid
+ @retval FALSE The entry point structure is not valid
+
+**/
+BOOLEAN
+IsEntryPointStructureValid (
+ IN SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure
+ )
+{
+ UINTN Index;
+ UINT8 Length;
+ UINT8 Checksum;
+ UINT8 *BytePtr;
+
+ BytePtr = (UINT8*) EntryPointStructure;
+ Length = EntryPointStructure->EntryPointLength;
+ Checksum = 0;
+
+ for (Index = 0; Index < Length; Index++) {
+ Checksum += BytePtr[Index];
+ }
+
+ if (Checksum != 0) {
+ return FALSE;
+ } else {
+ return TRUE;
+ }
+}
+
+
+/**
+ Get SMBIOS record length.
+
+ @param SmbiosTable SMBIOS pointer.
+
+**/
+UINTN
+SmbiosTableLength (
+ IN SMBIOS_STRUCTURE_POINTER SmbiosTable
+ )
+{
+ CHAR8 *AChar;
+ UINTN Length;
+
+ AChar = (CHAR8 *)(SmbiosTable.Raw + SmbiosTable.Hdr->Length);
+
+ //
+ // Each structure shall be terminated by a double-null (SMBIOS spec.7.1)
+ //
+ while ((*AChar != 0) || (*(AChar + 1) != 0)) {
+ AChar ++;
+ }
+ Length = ((UINTN)AChar - (UINTN)SmbiosTable.Raw + 2);
+
+ return Length;
+}
+
+
+/**
+ Install all structures from the given SMBIOS structures block
+
+ @param Smbios SMBIOS protocol
+ @param EntryPointStructure SMBIOS entry point structures block
+
+**/
+EFI_STATUS
+InstallAllStructures (
+ IN EFI_SMBIOS_PROTOCOL *Smbios,
+ IN SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure
+ )
+{
+ EFI_STATUS Status;
+ SMBIOS_STRUCTURE_POINTER SmbiosTable;
+ EFI_SMBIOS_HANDLE SmbiosHandle;
+
+ SmbiosTable.Raw = (UINT8*)(UINTN) EntryPointStructure->TableAddress;
+ if (SmbiosTable.Raw == NULL) {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ while (SmbiosTable.Hdr->Type != 127) {
+ //
+ // Log the SMBIOS data for this structure
+ //
+ SmbiosHandle = 0;
+ Status = Smbios->Add (
+ Smbios,
+ NULL,
+ &SmbiosHandle,
+ (EFI_SMBIOS_TABLE_HEADER*) SmbiosTable.Raw
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Get the next structure address
+ //
+ SmbiosTable.Raw = (UINT8 *)(SmbiosTable.Raw + SmbiosTableLength (SmbiosTable));
+ }
+
+ return EFI_SUCCESS;
+}
+
+
+/**
+ Installs SMBIOS information for OVMF
+
+ @param ImageHandle Module's image handle
+ @param SystemTable Pointer of EFI_SYSTEM_TABLE
+
+ @retval EFI_SUCCESS Smbios data successfully installed
+ @retval Other Smbios data was not installed
+
+**/
+EFI_STATUS
+EFIAPI
+SmbiosTablePublishEntry (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ EFI_SMBIOS_PROTOCOL *Smbios;
+ SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure;
+
+ //
+ // Find the SMBIOS protocol
+ //
+ Status = gBS->LocateProtocol (
+ &gEfiSmbiosProtocolGuid,
+ NULL,
+ (VOID**)&Smbios
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
+ // Add Xen SMBIOS data if found
+ //
+ EntryPointStructure = GetXenSmbiosTables ();
+ if (EntryPointStructure != NULL) {
+ Status = InstallAllStructures (Smbios, EntryPointStructure);
+ }
+
+ return Status;
+}
diff --git a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h
new file mode 100644
index 0000000000..bf99e43ba3
--- /dev/null
+++ b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h
@@ -0,0 +1,56 @@
+/** @file
+ This driver installs SMBIOS information for OVMF
+
+ Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
+ Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef _SMBIOS_PLATFORM_DXE_H_
+#define _SMBIOS_PLATFORM_DXE_H_
+
+#include <PiDxe.h>
+
+#include <Protocol/Smbios.h>
+#include <IndustryStandard/SmBios.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+
+/**
+ Locates the Xen SMBIOS data if it exists
+
+ @return SMBIOS_TABLE_ENTRY_POINT Address of Xen SMBIOS data
+
+**/
+SMBIOS_TABLE_ENTRY_POINT *
+GetXenSmbiosTables (
+ VOID
+ );
+
+
+/**
+ Validates the SMBIOS entry point structure
+
+ @param EntryPointStructure SMBIOS entry point structure
+
+ @retval TRUE The entry point structure is valid
+ @retval FALSE The entry point structure is not valid
+
+**/
+BOOLEAN
+IsEntryPointStructureValid (
+ IN SMBIOS_TABLE_ENTRY_POINT *EntryPointStructure
+ );
+
+#endif
diff --git a/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
new file mode 100644
index 0000000000..7058284944
--- /dev/null
+++ b/OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
@@ -0,0 +1,57 @@
+## @file
+# This driver installs SMBIOS information for OVMF
+#
+# Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
+# Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = SmbiosPlatformDxe
+ FILE_GUID = 4110465d-5ff3-4f4b-b580-24ed0d06747a
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+
+ ENTRY_POINT = SmbiosTablePublishEntry
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+#
+
+[Sources]
+ SmbiosPlatformDxe.h
+ SmbiosPlatformDxe.c
+ Xen.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ UefiBootServicesTableLib
+ BaseMemoryLib
+ BaseLib
+ UefiDriverEntryPoint
+ DebugLib
+ HobLib
+
+[Protocols]
+ gEfiSmbiosProtocolGuid # PROTOCOL ALWAYS_CONSUMED
+
+[Guids]
+ gEfiXenInfoGuid
+
+[Depex]
+ gEfiSmbiosProtocolGuid
+
diff --git a/OvmfPkg/SmbiosPlatformDxe/Xen.c b/OvmfPkg/SmbiosPlatformDxe/Xen.c
new file mode 100644
index 0000000000..93b8f74366
--- /dev/null
+++ b/OvmfPkg/SmbiosPlatformDxe/Xen.c
@@ -0,0 +1,63 @@
+/** @file
+ Detect Xen hvmloader SMBIOS data for usage by OVMF.
+
+ Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
+ Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "SmbiosPlatformDxe.h"
+#include <Library/HobLib.h>
+#include <Guid/XenInfo.h>
+
+#define XEN_SMBIOS_PHYSICAL_ADDRESS 0x000EB000
+#define XEN_SMBIOS_PHYSICAL_END 0x000F0000
+
+/**
+ Locates the Xen SMBIOS data if it exists
+
+ @return SMBIOS_TABLE_ENTRY_POINT Address of Xen SMBIOS data
+
+**/
+SMBIOS_TABLE_ENTRY_POINT *
+GetXenSmbiosTables (
+ VOID
+ )
+{
+ UINT8 *XenSmbiosPtr;
+ SMBIOS_TABLE_ENTRY_POINT *XenSmbiosEntryPointStructure;
+ EFI_HOB_GUID_TYPE *GuidHob;
+
+ //
+ // See if a XenInfo HOB is available
+ //
+ GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
+ if (GuidHob == NULL) {
+ return NULL;
+ }
+
+ for (XenSmbiosPtr = (UINT8*) XEN_SMBIOS_PHYSICAL_ADDRESS;
+ XenSmbiosPtr < (UINT8*) XEN_SMBIOS_PHYSICAL_END;
+ XenSmbiosPtr += 0x10) {
+
+ XenSmbiosEntryPointStructure = (SMBIOS_TABLE_ENTRY_POINT *) XenSmbiosPtr;
+
+ if (!AsciiStrnCmp ((CHAR8 *) XenSmbiosEntryPointStructure->AnchorString, "_SM_", 4) &&
+ !AsciiStrnCmp ((CHAR8 *) XenSmbiosEntryPointStructure->IntermediateAnchorString, "_DMI_", 5) &&
+ IsEntryPointStructureValid (XenSmbiosEntryPointStructure)) {
+
+ return XenSmbiosEntryPointStructure;
+
+ }
+ }
+
+ return NULL;
+}