Re: [edk2-platforms PATCH v2 4/7] SimicsOpenBoardPkg: Add DXE driver for Legacy Sio

["Nate DeSimone" <nathaniel.l.desimone@intel.com>]

Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>

-----Original Message-----
From: Wei, David Y 
Sent: Tuesday, August 27, 2019 5:40 PM
To: devel@edk2.groups.io
Cc: Wu, Hao A <hao.a.wu@intel.com>; Gao, Liming <liming.gao@intel.com>; Sinha, Ankit <ankit.sinha@intel.com>; Agyeman, Prince <prince.agyeman@intel.com>; Kubacki, Michael A <michael.a.kubacki@intel.com>; Desimone, Nathaniel L <nathaniel.l.desimone@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>
Subject: [edk2-platforms PATCH v2 4/7] SimicsOpenBoardPkg: Add DXE driver for Legacy Sio

Add DXE driver for Legacy Sio support

Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Ankit Sinha <ankit.sinha@intel.com>
Cc: Agyeman Prince <prince.agyeman@intel.com>
Cc: Kubacki Michael A <michael.a.kubacki@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>

Signed-off-by: David Wei <david.y.wei@intel.com>
---
 .../LegacySioDxe/ComponentName.c                   | 173 ++++++
 .../SimicsOpenBoardPkg/LegacySioDxe/SioChip.c      | 272 ++++++++++
 .../SimicsOpenBoardPkg/LegacySioDxe/SioDriver.c    | 600 +++++++++++++++++++++
 .../SimicsOpenBoardPkg/LegacySioDxe/SioService.c   | 249 +++++++++
 .../LegacySioDxe/ComponentName.h                   |  87 +++
 .../LegacySioDxe/LegacySioDxe.inf                  |  54 ++
 .../SimicsOpenBoardPkg/LegacySioDxe/Register.h     |  15 +
 .../SimicsOpenBoardPkg/LegacySioDxe/SioChip.h      | 195 +++++++
 .../SimicsOpenBoardPkg/LegacySioDxe/SioDriver.h    | 134 +++++
 .../SimicsOpenBoardPkg/LegacySioDxe/SioService.h   | 143 +++++
 10 files changed, 1922 insertions(+)
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.c
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.c
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.c
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.c
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.h
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/LegacySioDxe.inf
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/Register.h
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.h
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.h
 create mode 100644 Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.h

diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.c b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.c
new file mode 100644
index 0000000000..4ba02f92c0
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.c
@@ -0,0 +1,173 @@
+/** @file
+  Install Base and Size Info Ppi for Firmware Volume Recovery.
+
+  Copyright (c) 2013 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "SioDriver.h"
+
+///
+/// Component Name Protocol instance
+///
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME_PROTOCOL  mSioComponentName = {
+  SioComponentNameGetDriverName,
+  SioComponentNameGetControllerName,
+  "eng"
+};
+
+///
+/// Component Name 2 Protocol instance
+///
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_COMPONENT_NAME2_PROTOCOL mSioComponentName2 = {
+  (EFI_COMPONENT_NAME2_GET_DRIVER_NAME)    SioComponentNameGetDriverName,
+  (EFI_COMPONENT_NAME2_GET_CONTROLLER_NAME)SioComponentNameGetControllerName,
+  "en"
+};
+
+///
+/// Table of driver names
+///
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mSioDriverNameTable[] = {
+  {
+    "eng;en",
+    L"Super I/O Driver"
+  },
+  {
+    NULL,
+    NULL
+  }
+};
+
+///
+/// Table of Controller names
+///
+GLOBAL_REMOVE_IF_UNREFERENCED EFI_UNICODE_STRING_TABLE mSioControllerNameTable[] = {
+  {
+    "eng;en",
+    L"Super I/O Controller"
+  },
+  {
+    NULL,
+    NULL
+  }
+};
+
+/**
+  Retrieves a Unicode string that is the user-readable name of the EFI Driver.
+
+  @param  This       A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
+  @param  Language   A pointer to a three-character ISO 639-2 language identifier.
+                     This is the language of the driver name that that the caller
+                     is requesting, and it must match one of the languages specified
+                     in SupportedLanguages.  The number of languages supported by a
+                     driver is up to the driver writer.
+  @param  DriverName A pointer to the Unicode string to return.  This Unicode string
+                     is the name of the driver specified by This in the language
+                     specified by Language.
+
+  @retval EFI_SUCCESS           The Unicode string for the Driver specified by This
+                                and the language specified by Language was returned
+                                in DriverName.
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+  @retval EFI_INVALID_PARAMETER DriverName is NULL.
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support the
+                                language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+SioComponentNameGetDriverName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
+  IN  CHAR8                        *Language,
+  OUT CHAR16                       **DriverName
+  )
+{
+  return LookupUnicodeString2 (
+           Language,
+           This->SupportedLanguages,
+           mSioDriverNameTable,
+           DriverName,
+           (BOOLEAN)(This == &mSioComponentName)
+           );
+}
+
+/**
+  Retrieves a Unicode string that is the user readable name of the controller
+  that is being managed by an EFI Driver.
+
+  @param  This             A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
+  @param  ControllerHandle The handle of a controller that the driver specified by
+                           This is managing.  This handle specifies the controller
+                           whose name is to be returned.
+  @param  ChildHandle      The handle of the child controller to retrieve the name
+                           of.  This is an optional parameter that may be NULL.  It
+                           will be NULL for device drivers.  It will also be NULL
+                           for a bus drivers that wish to retrieve the name of the
+                           bus controller.  It will not be NULL for a bus driver
+                           that wishes to retrieve the name of a child controller.
+  @param  Language         A pointer to a three character ISO 639-2 language
+                           identifier.  This is the language of the controller name
+                           that the caller is requesting, and it must match one
+                           of the languages specified in SupportedLanguages.  The
+                           number of languages supported by a driver is up to the
+                           driver writer.
+  @param  ControllerName   A pointer to the Unicode string to return.  This Unicode
+                           string is the name of the controller specified by
+                           ControllerHandle and ChildHandle in the language specified
+                           by Language, from the point of view of the driver specified
+                           by This.
+
+  @retval EFI_SUCCESS           The Unicode string for the user-readable name in the
+                                language specified by Language for the driver
+                                specified by This was returned in DriverName.
+  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
+  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid EFI_HANDLE.
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
+  @retval EFI_UNSUPPORTED       The driver specified by This is not currently managing
+                                the controller specified by ControllerHandle and
+                                ChildHandle.
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support the
+                                language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+SioComponentNameGetControllerName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL   *This,
+  IN  EFI_HANDLE                    ControllerHandle,
+  IN  EFI_HANDLE                    ChildHandle        OPTIONAL,
+  IN  CHAR8                         *Language,
+  OUT CHAR16                        **ControllerName
+  )
+{
+  EFI_STATUS                        Status;
+
+  //
+  // Make sure this driver is currently managing ControllHandle
+  //
+  Status = EfiTestManagedDevice (
+             ControllerHandle,
+             mSioDriver.DriverBindingHandle,
+             &gEfiPciIoProtocolGuid
+             );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  //
+  // ChildHandle must be NULL for a Device Driver
+  //
+  if (ChildHandle != NULL) {
+    return EFI_UNSUPPORTED;
+  }
+
+  return LookupUnicodeString2 (
+           Language,
+           This->SupportedLanguages,
+           mSioControllerNameTable,
+           ControllerName,
+           (BOOLEAN)(This == &mSioComponentName)
+           );
+}
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.c b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.c
new file mode 100644
index 0000000000..b9a7b9cd24
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.c
@@ -0,0 +1,272 @@
+/** @file
+  Super I/O specific implementation.
+
+  Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "SioDriver.h"
+#include <Library/S3IoLib.h>
+
+LOCAL_IO_WRITE8    mIoWrite8         = IoWrite8;
+//
+// System configuration (setup) information
+//
+// SYSTEM_CONFIGURATION                mSystemConfiguration;
+
+//
+// COM 1 UART Controller
+//
+ACPI_SIO_RESOURCES_IO_IRQ      mCom1Resources = {
+  {
+    { ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR },
+    0x3f8,
+    8
+  },
+  {
+    { ACPI_IRQ_NOFLAG_DESCRIPTOR },
+    BIT4    // IRQ4
+  },
+  {
+    ACPI_END_TAG_DESCRIPTOR,
+    0
+  }
+};
+
+//
+// PS/2 Keyboard Controller
+//
+ACPI_SIO_RESOURCES_IO_IRQ      mKeyboardResources = {
+  {
+    { ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR },
+    0x60,
+    5
+  },
+  {
+    { ACPI_IRQ_NOFLAG_DESCRIPTOR },
+    BIT1
+  },
+  {
+    ACPI_END_TAG_DESCRIPTOR,
+    0
+  }
+};
+
+//
+// PS/2 Mouse Controller
+//
+ACPI_SIO_RESOURCES_IO_IRQ      mMouseResources = {
+  {
+    { ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR },
+    0x60,
+    5
+  },
+  {
+    { ACPI_IRQ_NOFLAG_DESCRIPTOR },
+    BIT12
+  },
+  {
+    ACPI_END_TAG_DESCRIPTOR,
+    0
+  }
+};
+
+//
+// Table of SIO Controllers
+//
+DEVICE_INFO    mDeviceInfo[] = {
+  {
+    {
+      EISA_PNP_ID(0x501),
+      0
+    },
+    0,
+    RESOURCE_IO | RESOURCE_IRQ,
+    { (ACPI_SMALL_RESOURCE_HEADER *) &mCom1Resources },
+    { (ACPI_SMALL_RESOURCE_HEADER *) &mCom1Resources }
+  },  // COM 1 UART Controller
+  {
+    {
+      EISA_PNP_ID(0x303),
+      0
+    },
+    0,
+    0,  // Cannot change resource
+    { (ACPI_SMALL_RESOURCE_HEADER *) &mKeyboardResources },
+    { (ACPI_SMALL_RESOURCE_HEADER *) &mKeyboardResources }
+  },  // PS/2 Keyboard Controller
+  {
+    {
+      EISA_PNP_ID(0xF03),
+      0
+    },
+    0,
+    0,  // Cannot change resource
+    { (ACPI_SMALL_RESOURCE_HEADER *) &mMouseResources },
+    { (ACPI_SMALL_RESOURCE_HEADER *) &mMouseResources }
+  }  // PS/2 Mouse Controller
+};
+
+
+/**
+  Return the supported devices.
+
+  @param[out] Devices         Pointer to pointer of EFI_SIO_ACPI_DEVICE_ID.
+                              Caller is responsible to free the buffer.
+  @param[out] Count           Pointer to UINTN holding the device count.
+**/
+VOID
+DeviceGetList (
+  OUT EFI_SIO_ACPI_DEVICE_ID **Devices,
+  OUT UINTN                  *Count
+  )
+{
+  EFI_SIO_ACPI_DEVICE_ID   *LocalDevices;
+  UINTN                    LocalCount;
+  UINTN                    DeviceCount;
+  UINTN                    Index;
+
+  //
+  // Allocate enough memory for simplicity
+  //
+  DeviceCount =  sizeof (mDeviceInfo) / sizeof (mDeviceInfo[0]);
+  LocalDevices = AllocatePool (sizeof (EFI_SIO_ACPI_DEVICE_ID) * DeviceCount);
+  ASSERT (LocalDevices != NULL);
+  if (LocalDevices == NULL) {
+    return;
+  }
+  LocalCount = 0;
+
+  for (Index = 0; Index < DeviceCount; Index++) {
+    CopyMem (&LocalDevices[LocalCount], &mDeviceInfo[Index].Device, sizeof (EFI_SIO_ACPI_DEVICE_ID));
+    LocalCount++;
+  }
+
+  *Devices = LocalDevices;
+  *Count   = LocalCount;
+}
+
+
+/**
+  Super I/O controller initialization.
+
+  @retval     EFI_SUCCESS       The super I/O controller is found and initialized.
+  @retval     EFI_UNSUPPORTED   The super I/O controller is not found.
+**/
+EFI_STATUS
+SioInit (
+  VOID
+  )
+{
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Find the DEVICE_INFO for specified Device.
+
+  @param[in]  Device        Pointer to the EFI_SIO_ACPI_DEVICE_ID.
+
+  @retval     DEVICE_INFO*  Pointer to the DEVICE_INFO.
+**/
+DEVICE_INFO *
+DeviceSearch (
+  IN EFI_SIO_ACPI_DEVICE_ID *Device
+  )
+{
+  UINTN       Index;
+
+  for (Index = 0; Index < sizeof (mDeviceInfo) / sizeof (mDeviceInfo[0]); Index++) {
+    if (CompareMem (Device, &mDeviceInfo[Index].Device, sizeof (*Device)) == 0) {
+      return &mDeviceInfo[Index];
+    }
+  }
+
+  ASSERT (FALSE);
+  return NULL;
+}
+
+
+/**
+  Program the SIO chip to enable the specified device using the default resource.
+
+  @param[in] Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+**/
+VOID
+DeviceEnable (
+  IN EFI_SIO_ACPI_DEVICE_ID   *Device
+  )
+{
+}
+
+
+/**
+  Get the ACPI resources for specified device.
+
+  @param[in]  Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+  @param[out] Resources       Pointer to ACPI_RESOURCE_HEADER_PTR.
+
+  @retval     EFI_SUCCESS     The resources are returned successfully.
+**/
+EFI_STATUS
+DeviceGetResources (
+  IN  EFI_SIO_ACPI_DEVICE_ID   *Device,
+  OUT ACPI_RESOURCE_HEADER_PTR *Resources
+  )
+{
+  DEVICE_INFO               *DeviceInfo;
+
+  DeviceInfo = DeviceSearch (Device);
+
+  *Resources = DeviceInfo->Resources;
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Set the ACPI resources for specified device.
+
+  The SIO chip is programmed to use the new resources and the
+  resources setting are saved. The function assumes the resources
+  are valid.
+
+  @param[in] Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+  @param[in] Resources       ACPI_RESOURCE_HEADER_PTR.
+
+  @retval    EFI_UNSUPPORTED
+**/
+EFI_STATUS
+DeviceSetResources (
+  IN EFI_SIO_ACPI_DEVICE_ID   *Device,
+  IN ACPI_RESOURCE_HEADER_PTR Resources
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+
+/**
+  Get the possible ACPI resources for specified device.
+
+  @param[in]  Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+  @param[out] Resources       Pointer to ACPI_RESOURCE_HEADER_PTR.
+
+  @retval     EFI_SUCCESS     The resources are returned successfully.
+**/
+EFI_STATUS
+DevicePossibleResources (
+  IN  EFI_SIO_ACPI_DEVICE_ID   *Device,
+  OUT ACPI_RESOURCE_HEADER_PTR *Resources
+  )
+{
+  DEVICE_INFO               *DeviceInfo;
+
+  DeviceInfo = DeviceSearch (Device);
+
+  *Resources = DeviceInfo->PossibleResources;
+
+  return EFI_SUCCESS;
+}
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.c b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.c
new file mode 100644
index 0000000000..408c6ff301
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.c
@@ -0,0 +1,600 @@
+/** @file
+  EFI Driver following Driver Binding Protocol.
+
+  Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "SioDriver.h"
+
+
+//
+// This driver is for ACPI(PNP0A03,0)/PCI(0x1f,0)
+//
+//
+//  Sio Driver Global Variables
+//
+EFI_DRIVER_BINDING_PROTOCOL mSioDriver = {
+  SioDriverSupported,
+  SioDriverStart,
+  SioDriverStop,
+  1,
+  NULL,
+  NULL
+};
+
+//
+// The list of the created SIO_DEV
+//
+LIST_ENTRY                  mSioDevPool = INITIALIZE_LIST_HEAD_VARIABLE (mSioDevPool);
+
+//
+// Template structure to create SIO_DEV
+//
+SIO_DEV                     mSioDevTemplate = {
+  SIO_DEV_SIGNATURE,        // Signature
+  NULL,                     // PciHandle
+  {
+    0x00000000,             // HID
+    0x00000000              // UID
+  },
+  NULL,                     // Handle
+  {                         // Sio Instance
+    SioRegisterAccess,
+    SioGetResources,
+    SioSetResources,
+    SioPossibleResources,
+    SioModify
+  },
+  NULL,                     // DevicePath
+  {
+    NULL,                   // ForwardLink
+    NULL,                   // BackLink
+  }
+};
+
+//
+// Template ACPI_HID_DEVICE_PATH structure to create device path
+//
+ACPI_HID_DEVICE_PATH        mAcpiNodeTemplate = {
+  {
+    ACPI_DEVICE_PATH,       // Type
+    ACPI_DP,                // SubType
+    {
+      sizeof (ACPI_HID_DEVICE_PATH),  // Length[0]
+      0                               // Length[1]
+    }
+  },
+  0x00000000,               // HID
+  0x00000000                // UID
+};
+
+
+/**
+  The user Entry Point for module Lpc47m17x. The user code starts with this function.
+
+  @param[in]  ImageHandle    The firmware allocated handle for the EFI image.
+  @param[in]  SystemTable    A pointer to the EFI System Table.
+
+  @retval     EFI_SUCCESS    The entry point is executed successfully.
+  @retval     other          Some error occurs when executing this entry point.
+**/
+EFI_STATUS
+EFIAPI
+SioDriverEntryPoint (
+  IN EFI_HANDLE           ImageHandle,
+  IN EFI_SYSTEM_TABLE     *SystemTable
+  )
+{
+  if (EFI_ERROR (SioInit())) {
+    return EFI_UNSUPPORTED;
+  } else {
+
+    //
+    // Install protocols
+    //
+    return EfiLibInstallDriverBindingComponentName2 (
+             ImageHandle,
+             SystemTable,
+             &mSioDriver,
+             ImageHandle,
+             &mSioComponentName,
+             &mSioComponentName2
+             );
+  }
+}
+
+
+/**
+  Test to see if this driver supports Controller Handle.
+
+  @param[in]  This                Protocol instance pointer.
+  @param[in]  Controller          Handle of device to test
+  @param[in]  RemainingDevicePath Optional parameter use to pick a specific child
+                                  device to start.
+
+  @retval     EFI_SUCCESS         This driver supports this device
+  @retval     EFI_ALREADY_STARTED This driver is already running on this device
+  @retval     other               This driver does not support this device
+**/
+EFI_STATUS
+EFIAPI
+SioDriverSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
+  IN EFI_HANDLE                     Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
+  )
+{
+  EFI_STATUS                Status;
+  EFI_PCI_IO_PROTOCOL       *PciIo;
+  EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath;
+  ACPI_HID_DEVICE_PATH      *AcpiNode;
+  PCI_TYPE00                Pci;
+  UINTN                     Index;
+  EFI_SIO_ACPI_DEVICE_ID    *Devices;
+  UINTN                     Count;
+  UINTN                     SegmentNumber;
+  UINTN                     BusNumber;
+  UINTN                     DeviceNumber;
+  UINTN                     FunctionNumber;
+
+  //
+  // If RemainingDevicePath is not NULL, it should verify that the first device
+  // path node in RemainingDevicePath is an ACPI Device path node which is a
+  // legal Device Path Node for this bus driver's children.
+  //
+  if (RemainingDevicePath != NULL) {
+    if (!IsDevicePathEnd (RemainingDevicePath)) {
+      if ((RemainingDevicePath->Type != ACPI_DEVICE_PATH) ||
+          (((RemainingDevicePath->SubType != ACPI_DP) || (DevicePathNodeLength (RemainingDevicePath) != sizeof (ACPI_HID_DEVICE_PATH))) &&
+          ((RemainingDevicePath->SubType != ACPI_EXTENDED_DP) || (DevicePathNodeLength (RemainingDevicePath) != sizeof (ACPI_EXTENDED_HID_DEVICE_PATH))))
+          ) {
+        return EFI_UNSUPPORTED;
+      }
+
+      DeviceGetList (&Devices, &Count);
+      if (Devices == NULL) {
+        return EFI_OUT_OF_RESOURCES;
+      }
+      AcpiNode = (ACPI_HID_DEVICE_PATH *) RemainingDevicePath;
+      for (Index = 0; Index < Count; Index++) {
+        if ((AcpiNode->HID == Devices[Index].HID) &&
+            (AcpiNode->UID == Devices[Index].UID)) {
+          break;
+        }
+      }
+      FreePool (Devices);
+      if (Index == Count) {
+        return EFI_UNSUPPORTED;
+      }
+    }
+  }
+
+  //
+  // See if the parent device path can be opened BY_DRIVER
+  //
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiDevicePathProtocolGuid,
+                  (VOID **) &ParentDevicePath,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_BY_DRIVER
+                  );
+  if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
+    return Status;
+  }
+
+  gBS->CloseProtocol (
+         Controller,
+         &gEfiDevicePathProtocolGuid,
+         This->DriverBindingHandle,
+         Controller
+         );
+
+  //
+  // Get PciIo protocol instance
+  //
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiPciIoProtocolGuid,
+                  (VOID **) &PciIo,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_BY_DRIVER
+                  );
+
+  if (!EFI_ERROR (Status)) {
+    Status = PciIo->Pci.Read (
+                          PciIo,
+                          EfiPciIoWidthUint32,
+                          0,
+                          sizeof (Pci) / sizeof (UINT32),
+                          &Pci
+                          );
+    ASSERT_EFI_ERROR (Status);
+
+    Status = EFI_UNSUPPORTED;
+    if ((Pci.Hdr.Command & (EFI_PCI_COMMAND_IO_SPACE | EFI_PCI_COMMAND_MEMORY_SPACE))
+                        == (EFI_PCI_COMMAND_IO_SPACE | EFI_PCI_COMMAND_MEMORY_SPACE)
+       ) {
+      if (Pci.Hdr.ClassCode[2] == PCI_CLASS_BRIDGE) {
+        //
+        // See if this is a standard PCI to ISA Bridge from the Base Code and Class Code
+        //
+        if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA) {
+          Status = EFI_SUCCESS;
+        }
+
+        //
+        // See if this is an Intel PCI to ISA Bridge in Positive Decode Mode
+        //
+        if ((Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA_PDECODE) &&
+            (Pci.Hdr.VendorId == 0x8086)) {
+          //
+          // See if this is on Function #0 to avoid false positive on
+          // PCI_CLASS_BRIDGE_OTHER that has the same value as
+          // PCI_CLASS_BRIDGE_ISA_PDECODE
+          //
+          Status = PciIo->GetLocation (
+                            PciIo,
+                            &SegmentNumber,
+                            &BusNumber,
+                            &DeviceNumber,
+                            &FunctionNumber
+                            );
+          if (!EFI_ERROR (Status) && (FunctionNumber == 0)) {
+            Status = EFI_SUCCESS;
+          } else {
+            Status = EFI_UNSUPPORTED;
+          }
+        }
+      }
+    }
+
+    gBS->CloseProtocol (
+           Controller,
+           &gEfiPciIoProtocolGuid,
+           This->DriverBindingHandle,
+           Controller
+           );
+  }
+  if (EFI_ERROR (Status) && (Status != EFI_ALREADY_STARTED)) {
+    return Status;
+  }
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Destroy the SIO controller handle.
+
+  @param[in]  ChildHandle     The SIO controller handle.
+
+  @retval     EFI_SUCCESS     The SIO controller handle is destroyed successfully.
+**/
+EFI_STATUS
+SioDestroyDevice (
+  IN EFI_HANDLE                ChildHandle
+  )
+{
+  EFI_STATUS                Status;
+  SIO_DEV                   *SioDev;
+  EFI_SIO_PROTOCOL          *Sio;
+  EFI_PCI_IO_PROTOCOL       *PciIo;
+
+  Status = gBS->HandleProtocol (
+                  ChildHandle,
+                  &gEfiSioProtocolGuid,
+                  (VOID **) &Sio
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  SioDev = SIO_DEV_FROM_THIS (Sio);
+
+  Status = gBS->CloseProtocol (
+                  SioDev->PciHandle,
+                  &gEfiPciIoProtocolGuid,
+                  mSioDriver.DriverBindingHandle,
+                  ChildHandle
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  Status = gBS->UninstallMultipleProtocolInterfaces (
+                  ChildHandle,
+                  &gEfiDevicePathProtocolGuid,
+                  SioDev->DevicePath,
+                  &gEfiSioProtocolGuid,
+                  &SioDev->Sio,
+                  NULL
+                  );
+  if (EFI_ERROR (Status)) {
+    gBS->OpenProtocol (
+           SioDev->PciHandle,
+           &gEfiPciIoProtocolGuid,
+           (VOID **) &PciIo,
+           mSioDriver.DriverBindingHandle,
+           ChildHandle,
+           EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+           );
+    return Status;
+  }
+
+  RemoveEntryList (&SioDev->Link);
+  FreePool (SioDev->DevicePath);
+  FreePool (SioDev);
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Create the SIO controller handle.
+
+  @param[in]  Controller       The parent PCI controller handle.
+  @param[in]  Device           Pointer to EFI_SIO_ACPI_DEVICE_ID.
+  @param[in]  ParentDevicePath The device path of the parent controller.
+  @param[out] PciIo            The PciIo instance of the parent controller.
+**/
+VOID
+SioCreateDevice (
+  IN  EFI_HANDLE                Controller,
+  IN  EFI_SIO_ACPI_DEVICE_ID    *Device,
+  IN  EFI_DEVICE_PATH_PROTOCOL  *ParentDevicePath,
+  OUT EFI_PCI_IO_PROTOCOL       *PciIo
+  )
+{
+  EFI_STATUS                Status;
+  SIO_DEV                   *SioDev;
+
+  DeviceEnable (Device);
+  SioDev = AllocateCopyPool (sizeof (SIO_DEV), &mSioDevTemplate);
+  ASSERT (SioDev != NULL);
+  if (SioDev == NULL) {
+    return;
+  }
+  InsertHeadList (&mSioDevPool, &SioDev->Link);
+
+  SioDev->PciHandle       = Controller;
+
+  CopyMem (&SioDev->Device, Device, sizeof (*Device));
+
+  mAcpiNodeTemplate.HID = Device->HID;
+  mAcpiNodeTemplate.UID = Device->UID;
+  SioDev->DevicePath = AppendDevicePathNode (ParentDevicePath, (EFI_DEVICE_PATH_PROTOCOL *) &mAcpiNodeTemplate);
+  ASSERT (SioDev->DevicePath != NULL);
+
+  Status = gBS->InstallMultipleProtocolInterfaces (
+                  &SioDev->Handle,
+                  &gEfiSioProtocolGuid,        &SioDev->Sio,
+                  &gEfiDevicePathProtocolGuid, SioDev->DevicePath,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiPciIoProtocolGuid,
+                  (VOID **) &PciIo,
+                  mSioDriver.DriverBindingHandle,
+                  SioDev->Handle,
+                  EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
+                  );
+  ASSERT_EFI_ERROR (Status);
+}
+
+
+/**
+  Start this driver on ControllerHandle.
+
+  @param[in]  This                 Protocol instance pointer.
+  @param[in]  Controller           Handle of device to bind driver to
+  @param[in]  RemainingDevicePath  Optional parameter use to pick a specific child
+                                   device to start.
+
+  @retval     EFI_SUCCESS          This driver is added to ControllerHandle
+  @retval     EFI_ALREADY_STARTED  This driver is already running on ControllerHandle
+  @retval     other                This driver does not support this device
+**/
+EFI_STATUS
+EFIAPI
+SioDriverStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
+  IN EFI_HANDLE                     Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
+  )
+{
+  EFI_STATUS                          Status;
+  EFI_PCI_IO_PROTOCOL                 *PciIo;
+  EFI_DEVICE_PATH_PROTOCOL            *DevicePath;
+  EFI_DEVICE_PATH_PROTOCOL            *ParentDevicePath;
+  EFI_SIO_ACPI_DEVICE_ID              *Devices;
+  SIO_DEV                             *SioDev;
+  UINTN                               Count;
+  UINTN                               Index;
+  ACPI_HID_DEVICE_PATH                *AcpiNode;
+  BOOLEAN                             *HasCreated;
+  BOOLEAN                             *RequestCreate;
+  LIST_ENTRY                          *Node;
+
+  HasCreated    = NULL;
+  RequestCreate = NULL;
+  //
+  // Get the ISA bridge's Device Path
+  //
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiDevicePathProtocolGuid,
+                  (VOID **) &ParentDevicePath,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_BY_DRIVER
+                  );
+  if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
+    return Status;
+  }
+
+  //
+  // Get Pci IO
+  //
+  Status = gBS->OpenProtocol (
+                  Controller,
+                  &gEfiPciIoProtocolGuid,
+                  (VOID **) &PciIo,
+                  This->DriverBindingHandle,
+                  Controller,
+                  EFI_OPEN_PROTOCOL_BY_DRIVER
+                  );
+
+  if (EFI_ERROR (Status) && Status != EFI_ALREADY_STARTED) {
+    gBS->CloseProtocol (
+           Controller,
+           &gEfiDevicePathProtocolGuid,
+           This->DriverBindingHandle,
+           Controller
+           );
+    return Status;
+  }
+
+  if ((RemainingDevicePath != NULL) && IsDevicePathEnd (RemainingDevicePath)) {
+    return EFI_SUCCESS;
+  }
+
+  DeviceGetList (&Devices, &Count);
+  if (Devices == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit_Start;
+  }
+  HasCreated    = AllocatePool (sizeof (BOOLEAN) * Count);
+  ASSERT (HasCreated != NULL);
+  if (HasCreated == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit_Start;
+  }
+  RequestCreate = AllocatePool (sizeof (BOOLEAN) * Count);
+  ASSERT (RequestCreate != NULL);
+  if (RequestCreate == NULL) {
+    Status = EFI_OUT_OF_RESOURCES;
+    goto Exit_Start;
+  }
+
+  //
+  // Assume no children has been created.
+  // Assume the SIO interface hasn't been initialized.
+  //
+  ZeroMem (HasCreated, sizeof (BOOLEAN) * Count);
+
+  if (Status == EFI_ALREADY_STARTED) {
+    for (Node = GetFirstNode (&mSioDevPool);
+         !IsNull (&mSioDevPool, Node);
+         Node = GetNextNode (&mSioDevPool, Node)
+        ) {
+      SioDev = CR (Node, SIO_DEV, Link, SIO_DEV_SIGNATURE);
+      Status = gBS->HandleProtocol (
+                      SioDev->PciHandle,
+                      &gEfiDevicePathProtocolGuid,
+                      (VOID **) &DevicePath
+                      );
+      ASSERT_EFI_ERROR (Status);
+
+      //
+      // See if they are under the same PCI to ISA Bridge
+      //
+      if (CompareMem (DevicePath, ParentDevicePath, GetDevicePathSize (DevicePath)) == 0) {
+        for (Index = 0; Index < Count; Index++) {
+          if (CompareMem (&SioDev->Device, &Devices[Index], sizeof (EFI_SIO_ACPI_DEVICE_ID)) == 0) {
+            HasCreated[Index] = TRUE;
+            break;
+          }
+        }
+      }
+    }
+  }
+
+  AcpiNode = (ACPI_HID_DEVICE_PATH *) RemainingDevicePath;
+  for (Index = 0; Index < Count; Index++) {
+    if ((AcpiNode == NULL) ||
+        ((AcpiNode->HID == Devices[Index].HID) && (AcpiNode->UID == Devices[Index].UID))
+       ) {
+      RequestCreate[Index] = TRUE;
+    } else {
+      RequestCreate[Index] = FALSE;
+    }
+  }
+
+  for (Index = 0; Index < Count; Index++) {
+    if (RequestCreate[Index] && !HasCreated[Index]) {
+      SioCreateDevice (Controller, &Devices[Index], ParentDevicePath, PciIo);
+    }
+  }
+Exit_Start:
+  if (Devices != NULL) {
+    FreePool (Devices);
+  }
+  if (HasCreated != NULL) {
+    FreePool (HasCreated);
+  }
+  if (RequestCreate != NULL) {
+    FreePool (RequestCreate);
+  }
+
+  return Status;
+}
+
+
+/**
+  Stop this driver on ControllerHandle.
+
+  @param[in]  This              Protocol instance pointer.
+  @param[in]  Controller        Handle of device to stop driver on
+  @param[in]  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
+                                children is zero stop the entire bus driver.
+  @param[in]  ChildHandleBuffer List of Child Handles to Stop.
+
+  @retval     EFI_SUCCESS       This driver is removed ControllerHandle
+  @retval     other             This driver was not removed from this device
+**/
+EFI_STATUS
+EFIAPI
+SioDriverStop (
+  IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
+  IN  EFI_HANDLE                     Controller,
+  IN  UINTN                          NumberOfChildren,
+  IN  EFI_HANDLE                     *ChildHandleBuffer
+  )
+{
+  EFI_STATUS  Status;
+  UINTN       Index;
+  BOOLEAN     AllChildrenStopped;
+
+  if (NumberOfChildren == 0) {
+    gBS->CloseProtocol (
+           Controller,
+           &gEfiDevicePathProtocolGuid,
+           This->DriverBindingHandle,
+           Controller
+           );
+    gBS->CloseProtocol (
+           Controller,
+           &gEfiPciIoProtocolGuid,
+           This->DriverBindingHandle,
+           Controller
+           );
+    return EFI_SUCCESS;
+  }
+
+  AllChildrenStopped = TRUE;
+  for (Index = 0; Index < NumberOfChildren; Index++) {
+    Status = SioDestroyDevice (ChildHandleBuffer[Index]);
+    if (EFI_ERROR (Status)) {
+      AllChildrenStopped = FALSE;
+    }
+  }
+
+  if (AllChildrenStopped) {
+    return EFI_SUCCESS;
+  } else {
+    return EFI_DEVICE_ERROR;
+  }
+}
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.c b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.c
new file mode 100644
index 0000000000..379002b833
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.c
@@ -0,0 +1,249 @@
+/** @file
+  Super I/O Interface implementation.
+
+  Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include "SioDriver.h"
+
+
+/**
+  Provides an interface to get a list of the current resources consumed by the device in the ACPI
+  Resource Descriptor format.
+
+  GetResources() returns a list of resources currently consumed by the device. The
+  ResourceList is a pointer to the buffer containing resource descriptors for the device. The
+  descriptors are in the format of Small or Large ACPI resource descriptor as defined by ACPI
+  specification (2.0 & 3.0). The buffer of resource descriptors is terminated with the 'End tag'
+  resource descriptor.
+
+  @param[in]  This                  Indicates a pointer to the calling context.
+  @param[out] ResourceList          A pointer to an ACPI resource descriptor list that defines the current resources
+                                    used by the device. Type ACPI_RESOURCE_HEADER_PTR is defined in the "Related
+                                    Definitions" below.
+
+  @retval     EFI_SUCCESS           The operation completed successfully
+  @retval     EFI_INVALID_PARAMETER ResourceList is NULL
+**/
+EFI_STATUS
+EFIAPI
+SioGetResources (
+  IN  CONST EFI_SIO_PROTOCOL    *This,
+  OUT ACPI_RESOURCE_HEADER_PTR  *ResourceList
+  )
+{
+  SIO_DEV                *SioDev;
+
+  if (ResourceList == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  SioDev = SIO_DEV_FROM_THIS (This);
+
+  return DeviceGetResources (&SioDev->Device, ResourceList);
+}
+
+
+/**
+  Provides a collection of resource descriptor lists. Each resource descriptor list in the collection
+  defines a combination of resources that can potentially be used by the device.
+
+  @param[in]  This                      Indicates a pointer to the calling context.
+  @param[out] ResourceCollection        Collection of the resource descriptor lists.
+
+  @retval     EFI_SUCCESS               The operation completed successfully
+  @retval     EFI_INVALID_PARAMETER     ResourceCollection is NULL
+**/
+EFI_STATUS
+EFIAPI
+SioPossibleResources (
+  IN  CONST EFI_SIO_PROTOCOL    *This,
+  OUT ACPI_RESOURCE_HEADER_PTR  *ResourceCollection
+  )
+{
+  SIO_DEV                *SioDev;
+
+  if (ResourceCollection == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  SioDev = SIO_DEV_FROM_THIS (This);
+
+  return DevicePossibleResources (&SioDev->Device, ResourceCollection);
+}
+
+
+/**
+  Sets the resources for the device.
+
+  @param[in]  This                  Indicates a pointer to the calling context.
+  @param[in]  ResourceList          Pointer to the ACPI resource descriptor list. Type ACPI_RESOURCE_HEADER_PTR
+                                    is defined in the "Related Definitions" section of
+                                    EFI_SIO_PROTOCOL.GetResources().
+
+  @retval     EFI_SUCCESS           The operation completed successfully
+  @retval     EFI_INVALID_PARAMETER ResourceList is invalid
+  @retval     EFI_ACCESS_DENIED     Some of the resources in ResourceList are in use
+**/
+EFI_STATUS
+EFIAPI
+SioSetResources (
+  IN  CONST EFI_SIO_PROTOCOL    *This,
+  IN  ACPI_RESOURCE_HEADER_PTR  ResourceList
+  )
+{
+  SIO_DEV                   *SioDev;
+  ACPI_RESOURCE_HEADER_PTR  ResourcePtr;
+  ACPI_RESOURCE_HEADER_PTR  ResourceCollection;
+  ACPI_RESOURCE_HEADER_PTR  ResourcePtr2;
+  BOOLEAN                   Found;
+
+  ResourcePtr = ResourceList;
+  SioDev      = SIO_DEV_FROM_THIS (This);
+
+  //
+  // Check whether the resource is in the possible resource collection
+  //
+  DevicePossibleResources (&SioDev->Device, &ResourceCollection);
+
+  while (ResourcePtr.SmallHeader->Byte != ACPI_END_TAG_DESCRIPTOR) {
+
+    Found        = FALSE;
+    ResourcePtr2 = ResourceCollection;
+    while (ResourcePtr2.SmallHeader->Byte != ACPI_END_TAG_DESCRIPTOR) {
+      if (ResourcePtr2.SmallHeader->Bits.Type == 0) {
+        //
+        // Small Header
+        //
+        if (CompareMem (
+              ResourcePtr2.SmallHeader,
+              ResourcePtr.SmallHeader,
+              ResourcePtr2.SmallHeader->Bits.Length + sizeof (*ResourcePtr2.SmallHeader)
+              ) == 0) {
+         Found = TRUE;
+         break;
+        }
+
+        ResourcePtr2.SmallHeader = (ACPI_SMALL_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr2.SmallHeader
+                                 + ResourcePtr2.SmallHeader->Bits.Length
+                                 + sizeof (*ResourcePtr2.SmallHeader));
+
+      } else {
+        //
+        // Large Header
+        //
+        if (CompareMem (
+              ResourcePtr2.LargeHeader,
+              ResourcePtr.LargeHeader,
+              ResourcePtr2.LargeHeader->Length + sizeof (*ResourcePtr2.LargeHeader)
+              ) == 0) {
+          Found = TRUE;
+          break;
+        }
+
+        ResourcePtr2.LargeHeader = (ACPI_LARGE_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr2.LargeHeader
+                                 + ResourcePtr2.LargeHeader->Length
+                                 + sizeof (*ResourcePtr2.LargeHeader));
+      }
+    }
+
+    if (!Found) {
+      return EFI_ACCESS_DENIED;
+    }
+
+    if (ResourcePtr.SmallHeader->Bits.Type == 0) {
+      ResourcePtr.SmallHeader = (ACPI_SMALL_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr.SmallHeader
+                              + ResourcePtr.SmallHeader->Bits.Length
+                              + sizeof (*ResourcePtr.SmallHeader));
+    } else {
+      ResourcePtr.LargeHeader = (ACPI_LARGE_RESOURCE_HEADER *) ((UINT8 *) ResourcePtr.LargeHeader
+                              + ResourcePtr.LargeHeader->Length
+                              + sizeof (*ResourcePtr.LargeHeader));
+    }
+  }
+
+  //
+  // ResourceList can be set
+  //
+  return DeviceSetResources (&SioDev->Device, ResourceList);
+}
+
+
+/**
+  Provides a low level access to the registers for the Super I/O.
+
+  @param[in]        This                  Indicates a pointer to the calling context.
+  @param[in]        Write                 Specifies the type of the register operation. If this parameter is TRUE,
+                                          Value is interpreted as an input parameter and the operation is a register write.
+                                          If this parameter is FALSE, Value is interpreted as an output parameter and the
+                                          operation is a register read.
+  @param[in]        ExitCfgMode           Exit Configuration Mode Indicator. If this parameter is set to TRUE, the
+                                          Super I/O driver will turn off configuration mode of the Super I/O prior to returning
+                                          from this function. If this parameter is set to FALSE, the Super I/O driver will
+                                          leave Super I/O in the configuration mode.
+                                          The Super I/O driver must track the current state of the Super I/O and enable the
+                                          configuration mode of Super I/O if necessary prior to register access.
+  @param[in]        Register              Register number.
+  @param[in, out]   Value                 If Write is TRUE, Value is a pointer to the buffer containing the byte of data to be
+                                          written to the Super I/O register. If Write is FALSE, Value is a pointer to the
+                                          destination buffer for the byte of data to be read from the Super I/O register.
+
+  @retval           EFI_SUCCESS           The operation completed successfully
+  @retval           EFI_INVALID_PARAMETER The Value is NULL
+  @retval           EFI_INVALID_PARAMETER Invalid Register number
+**/
+EFI_STATUS
+EFIAPI
+SioRegisterAccess (
+  IN CONST EFI_SIO_PROTOCOL    *This,
+  IN BOOLEAN                   Write,
+  IN BOOLEAN                   ExitCfgMode,
+  IN UINT8                     Register,
+  IN OUT UINT8                 *Value
+  )
+{
+  if (Value == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  return EFI_SUCCESS;
+}
+
+
+/**
+  Provides an interface for a table based programming of the Super I/O registers.
+
+  The Modify() function provides an interface for table based programming of the Super I/O
+  registers. This function can be used to perform programming of multiple Super I/O registers with a
+  single function call. For each table entry, the Register is read, its content is bitwise ANDed with
+  AndMask, and then ORed with OrMask before being written back to the Register. The Super
+  I/O driver must track the current state of the Super I/O and enable the configuration mode of Super I/
+  O if necessary prior to table processing. Once the table is processed, the Super I/O device has to be
+  returned to the original state.
+
+  @param[in] This                  Indicates a pointer to the calling context.
+  @param[in] Command               A pointer to an array of NumberOfCommands EFI_SIO_REGISTER_MODIFY
+                                   structures. Each structure specifies a single Super I/O register modify operation.
+                                   Type EFI_SIO_REGISTER_MODIFY is defined in the "Related Definitions" below.
+  @param[in] NumberOfCommands      Number of elements in the Command array.
+
+  @retval    EFI_SUCCESS           The operation completed successfully
+  @retval    EFI_INVALID_PARAMETER Command is NULL
+**/
+EFI_STATUS
+EFIAPI
+SioModify (
+  IN CONST EFI_SIO_PROTOCOL        *This,
+  IN CONST EFI_SIO_REGISTER_MODIFY *Command,
+  IN UINTN                         NumberOfCommands
+  )
+{
+
+  if (Command == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  return EFI_SUCCESS;
+}
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.h b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.h
new file mode 100644
index 0000000000..5368f94bcd
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/ComponentName.h
@@ -0,0 +1,87 @@
+/** @file
+  Install Base and Size Info Ppi for Firmware Volume Recovery.
+
+  Copyright (c) 2013 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+/**
+  Retrieves a Unicode string that is the user-readable name of the EFI Driver.
+
+  @param  This       A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
+  @param  Language   A pointer to a three-character ISO 639-2 language identifier.
+                     This is the language of the driver name that that the caller
+                     is requesting, and it must match one of the languages specified
+                     in SupportedLanguages.  The number of languages supported by a
+                     driver is up to the driver writer.
+  @param  DriverName A pointer to the Unicode string to return.  This Unicode string
+                     is the name of the driver specified by This in the language
+                     specified by Language.
+
+  @retval EFI_SUCCESS           The Unicode string for the Driver specified by This
+                                and the language specified by Language was returned
+                                in DriverName.
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+  @retval EFI_INVALID_PARAMETER DriverName is NULL.
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support the
+                                language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+SioComponentNameGetDriverName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL  *This,
+  IN  CHAR8                        *Language,
+  OUT CHAR16                       **DriverName
+  );
+
+/**
+  Retrieves a Unicode string that is the user readable name of the controller
+  that is being managed by an EFI Driver.
+
+  @param  This             A pointer to the EFI_COMPONENT_NAME_PROTOCOL instance.
+  @param  ControllerHandle The handle of a controller that the driver specified by
+                           This is managing.  This handle specifies the controller
+                           whose name is to be returned.
+  @param  ChildHandle      The handle of the child controller to retrieve the name
+                           of.  This is an optional parameter that may be NULL.  It
+                           will be NULL for device drivers.  It will also be NULL
+                           for a bus drivers that wish to retrieve the name of the
+                           bus controller.  It will not be NULL for a bus driver
+                           that wishes to retrieve the name of a child controller.
+  @param  Language         A pointer to a three character ISO 639-2 language
+                           identifier.  This is the language of the controller name
+                           that the caller is requesting, and it must match one
+                           of the languages specified in SupportedLanguages.  The
+                           number of languages supported by a driver is up to the
+                           driver writer.
+  @param  ControllerName   A pointer to the Unicode string to return.  This Unicode
+                           string is the name of the controller specified by
+                           ControllerHandle and ChildHandle in the language specified
+                           by Language, from the point of view of the driver specified
+                           by This.
+
+  @retval EFI_SUCCESS           The Unicode string for the user-readable name in the
+                                language specified by Language for the driver
+                                specified by This was returned in DriverName.
+  @retval EFI_INVALID_PARAMETER ControllerHandle is NULL.
+  @retval EFI_INVALID_PARAMETER ChildHandle is not NULL and it is not a valid EFI_HANDLE.
+  @retval EFI_INVALID_PARAMETER Language is NULL.
+  @retval EFI_INVALID_PARAMETER ControllerName is NULL.
+  @retval EFI_UNSUPPORTED       The driver specified by This is not currently managing
+                                the controller specified by ControllerHandle and
+                                ChildHandle.
+  @retval EFI_UNSUPPORTED       The driver specified by This does not support the
+                                language specified by Language.
+
+**/
+EFI_STATUS
+EFIAPI
+SioComponentNameGetControllerName (
+  IN  EFI_COMPONENT_NAME_PROTOCOL   *This,
+  IN  EFI_HANDLE                    ControllerHandle,
+  IN  EFI_HANDLE                    ChildHandle        OPTIONAL,
+  IN  CHAR8                         *Language,
+  OUT CHAR16                        **ControllerName
+  );
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/LegacySioDxe.inf b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/LegacySioDxe.inf
new file mode 100644
index 0000000000..275f36ca47
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/LegacySioDxe.inf
@@ -0,0 +1,54 @@
+## @file
+# Module information that produces the
+# EFI_SIO_PROTOCOL.
+#
+# Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010017
+  BASE_NAME                      = HitachiH8s2113Dxe
+  FILE_GUID                      = 7807E404-8281-4FF1-8457-0B54BABE263F
+  VERSION_STRING                 = 1.0
+  MODULE_TYPE                    = UEFI_DRIVER
+  ENTRY_POINT                    = SioDriverEntryPoint
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC
+#
+
+[LibraryClasses]
+  BaseLib
+  UefiLib
+  DebugLib
+  MemoryAllocationLib
+  PcdLib
+  DevicePathLib
+  IoLib
+  UefiDriverEntryPoint
+  UefiBootServicesTableLib
+  S3BootScriptLib
+  S3IoLib
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[Sources]
+  SioChip.c
+  SioChip.h
+  SioService.c
+  SioService.h
+  SioDriver.c
+  SioDriver.h
+  ComponentName.c
+
+[Protocols]
+  gEfiPciIoProtocolGuid                         ## CONSUMES
+  gEfiDevicePathProtocolGuid                    ## PRODUCES
+  gEfiSioProtocolGuid                           ## PRODUCES
+
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/Register.h b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/Register.h
new file mode 100644
index 0000000000..f61f713cf2
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/Register.h
@@ -0,0 +1,15 @@
+/** @file
+  Super I/O register definitions
+
+  Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef _REGISTER_H_
+#define _REGISTER_H_
+
+#define EC_COMMAND_PORT 0x66
+#define EC_DATA_PORT    0x62
+
+#endif
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.h b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.h
new file mode 100644
index 0000000000..48e28c44b0
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioChip.h
@@ -0,0 +1,195 @@
+/** @file
+  Super I/O specific header.
+
+  Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef _SIO_H_
+#define _SIO_H_
+
+
+#include "Register.h"
+
+typedef
+UINT8
+(EFIAPI *LOCAL_IO_WRITE8) (
+  IN      UINTN                     Port,
+  IN      UINT8                     Value
+  );
+
+#define RESOURCE_IO    BIT0
+#define RESOURCE_IRQ   BIT1
+#define RESOURCE_DMA   BIT2
+#define RESOURCE_MEM   BIT3
+
+#pragma pack(1)
+
+typedef struct {
+  EFI_ACPI_FIXED_LOCATION_IO_PORT_DESCRIPTOR  Io;
+  EFI_ACPI_IRQ_NOFLAG_DESCRIPTOR              Irq;
+  EFI_ACPI_END_TAG_DESCRIPTOR                 End;
+} ACPI_SIO_RESOURCES_IO_IRQ;
+#pragma pack()
+
+typedef struct {
+  UINT32                      HID;
+  UINT32                      UID;
+} EFI_SIO_ACPI_DEVICE_ID;
+
+typedef struct {
+  EFI_SIO_ACPI_DEVICE_ID      Device;
+  UINT8                       DeviceId;
+  UINT8                       ResourceMask;
+  ACPI_RESOURCE_HEADER_PTR    Resources;
+  ACPI_RESOURCE_HEADER_PTR    PossibleResources;
+} DEVICE_INFO;
+
+
+/**
+  Initialize the SIO chip for S3.
+**/
+VOID
+SioInitForS3 (
+  VOID
+  );
+
+
+/**
+  Return the supported devices.
+
+  @param[out] Devices         Pointer to pointer of EFI_SIO_ACPI_DEVICE_ID.
+                              Caller is responsible to free the buffer.
+  @param[out] Count           Pointer to UINTN holding the device count.
+**/
+VOID
+DeviceGetList (
+  OUT EFI_SIO_ACPI_DEVICE_ID **Devices,
+  OUT UINTN                  *Count
+  );
+
+
+/**
+  Program the SIO chip to enable the specified device using the default resource.
+
+  @param[in]  Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+**/
+VOID
+DeviceEnable (
+  IN EFI_SIO_ACPI_DEVICE_ID   *Device
+  );
+
+
+/**
+  Get the possible ACPI resources for specified device.
+
+  @param[in]  Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+  @param[out] Resources       Pointer to ACPI_RESOURCE_HEADER_PTR.
+
+  @retval     EFI_SUCCESS     The resources are returned successfully.
+**/
+EFI_STATUS
+DevicePossibleResources (
+  IN  EFI_SIO_ACPI_DEVICE_ID   *Device,
+  OUT ACPI_RESOURCE_HEADER_PTR *Resources
+  );
+
+
+/**
+  Set the ACPI resources for specified device.
+
+  The SIO chip is programmed to use the new resources and the
+  resources setting are saved. The function assumes the resources
+  are valid.
+
+  @param[in]  Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+  @param[in]  Resources       ACPI_RESOURCE_HEADER_PTR.
+
+  @retval     EFI_SUCCESS     The resources are set successfully.
+**/
+EFI_STATUS
+DeviceSetResources (
+  IN EFI_SIO_ACPI_DEVICE_ID   *Device,
+  IN ACPI_RESOURCE_HEADER_PTR Resources
+  );
+
+
+/**
+  Get the ACPI resources for specified device.
+
+  @param[in]  Device          Pointer to EFI_SIO_ACPI_DEVICE_ID.
+  @param[out] Resources       Pointer to ACPI_RESOURCE_HEADER_PTR.
+
+  @retval     EFI_SUCCESS     The resources are returned successfully.
+**/
+EFI_STATUS
+DeviceGetResources (
+  IN  EFI_SIO_ACPI_DEVICE_ID   *Device,
+  OUT ACPI_RESOURCE_HEADER_PTR *Resources
+  );
+
+
+/**
+  Program the SIO chip to enter the configure mode.
+**/
+VOID
+EnterConfigMode (
+  VOID
+  );
+
+
+/**
+  Program the SIO chip to exit the configure mode.
+**/
+VOID
+ExitConfigMode (
+  VOID
+  );
+
+
+/**
+  Perform a 8-bit I/O write to SIO register.
+
+  @param[in]  Index  The register index.
+  @param[in]  Data   The value to write to register.
+**/
+VOID
+WriteRegister (
+  IN  UINT8            Index,
+  IN  UINT8            Data
+  );
+
+
+/**
+  Perform a 8-bit I/O read from SIO register.
+
+  @param[in]  Index  The register index.
+
+  @retval     Value  The value written to the register.
+**/
+UINT8
+ReadRegister (
+  IN  UINT8            Index
+  );
+
+//
+// Prototypes for the sio internal function
+//
+//
+// Internal function
+//
+
+
+/**
+  Find Super I/O controller.
+
+  @retval     EFI_SUCCESS       Super I/O controller exists.
+  @retval     EFI_UNSUPPORTED   Super I/O controller does not exist.
+**/
+EFI_STATUS
+SioInit (
+  VOID
+  );
+
+#endif
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.h b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.h
new file mode 100644
index 0000000000..2e75871f7f
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioDriver.h
@@ -0,0 +1,134 @@
+/** @file
+  Header file for Driver Binding Protocol.
+
+  Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef _SIO_DRIVER_H_
+#define _SIO_DRIVER_H_
+
+#include <PiDxe.h>
+#include <IndustryStandard/Pci.h>
+#include <Library/BaseLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/IoLib.h>
+#include <Library/S3BootScriptLib.h>
+#include <Library/PciLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/UefiLib.h>
+#include <Library/PcdLib.h>
+
+//
+// Driver Consumed Protocol Prototypes
+//
+#include <Protocol/DriverBinding.h>
+#include <Protocol/PciIo.h>
+#include <Protocol/DevicePath.h>
+
+//
+// Driver Produced Protocol Prototypes
+//
+#include <Protocol/SuperIo.h>
+
+
+#include "SioChip.h"
+#include "SioService.h"
+#include "ComponentName.h"
+
+//
+// Global Variables definitions
+//
+extern EFI_DRIVER_BINDING_PROTOCOL   mSioDriver;
+extern EFI_COMPONENT_NAME_PROTOCOL   mSioComponentName;
+extern EFI_COMPONENT_NAME2_PROTOCOL  mSioComponentName2;
+
+//
+// SIO device private data structure
+//
+#define SIO_DEV_SIGNATURE SIGNATURE_32 ('_', 'S', 'I', 'O')
+
+typedef struct _SIO_DEV {
+  UINT32                   Signature;
+  EFI_HANDLE               PciHandle;
+  EFI_SIO_ACPI_DEVICE_ID   Device;
+  EFI_HANDLE               Handle;
+  EFI_SIO_PROTOCOL         Sio;
+  EFI_DEVICE_PATH_PROTOCOL *DevicePath;
+  LIST_ENTRY               Link;
+} SIO_DEV;
+
+#define SIO_DEV_FROM_THIS(a) CR (a, SIO_DEV, Sio, SIO_DEV_SIGNATURE)
+
+//
+// Prototypes for Driver model protocol interface
+//
+
+
+/**
+  Test to see if this driver supports Controller Handle.
+
+  @param[in]  This                Protocol instance pointer.
+  @param[in]  Controller          Handle of device to test
+  @param[in]  RemainingDevicePath Optional parameter use to pick a specific child
+                                  device to start.
+
+  @retval     EFI_SUCCESS         This driver supports this device
+  @retval     EFI_ALREADY_STARTED This driver is already running on this device
+  @retval     other               This driver does not support this device
+**/
+EFI_STATUS
+EFIAPI
+SioDriverSupported (
+  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
+  IN EFI_HANDLE                     Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
+  );
+
+
+/**
+  Start this driver on ControllerHandle.
+
+  @param[in]  This                 Protocol instance pointer.
+  @param[in]  Controller           Handle of device to bind driver to
+  @param[in]  RemainingDevicePath  Optional parameter use to pick a specific child
+                                   device to start.
+
+  @retval     EFI_SUCCESS          This driver is added to ControllerHandle
+  @retval     EFI_ALREADY_STARTED  This driver is already running on ControllerHandle
+  @retval     other                This driver does not support this device
+**/
+EFI_STATUS
+EFIAPI
+SioDriverStart (
+  IN EFI_DRIVER_BINDING_PROTOCOL    *This,
+  IN EFI_HANDLE                     Controller,
+  IN EFI_DEVICE_PATH_PROTOCOL       *RemainingDevicePath
+  );
+
+
+/**
+  Stop this driver on ControllerHandle.
+
+  @param[in]  This              Protocol instance pointer.
+  @param[in]  Controller        Handle of device to stop driver on
+  @param[in]  NumberOfChildren  Number of Handles in ChildHandleBuffer. If number of
+                                children is zero stop the entire bus driver.
+  @param[in]  ChildHandleBuffer List of Child Handles to Stop.
+
+  @retval     EFI_SUCCESS       This driver is removed ControllerHandle
+  @retval     other             This driver was not removed from this device
+**/
+EFI_STATUS
+EFIAPI
+SioDriverStop (
+  IN  EFI_DRIVER_BINDING_PROTOCOL    *This,
+  IN  EFI_HANDLE                     Controller,
+  IN  UINTN                          NumberOfChildren,
+  IN  EFI_HANDLE                     *ChildHandleBuffer
+  );
+#endif
diff --git a/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.h b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.h
new file mode 100644
index 0000000000..6a8081dc6e
--- /dev/null
+++ b/Platform/Intel/SimicsOpenBoardPkg/LegacySioDxe/SioService.h
@@ -0,0 +1,143 @@
+/** @file
+  Super I/O Interface function declarations.
+
+  Copyright (c) 2010 - 2019 Intel Corporation. All rights reserved. <BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef _SIO_ACPI_H_
+#define _SIO_ACPI_H_
+
+//
+// Prototypes for the SIO protocol interface
+//
+
+
+/**
+  Provides an interface to get a list of the current resources consumed by the device in the ACPI
+  Resource Descriptor format.
+
+  GetResources() returns a list of resources currently consumed by the device. The
+  ResourceList is a pointer to the buffer containing resource descriptors for the device. The
+  descriptors are in the format of Small or Large ACPI resource descriptor as defined by ACPI
+  specification (2.0 & 3.0). The buffer of resource descriptors is terminated with the 'End tag'
+  resource descriptor.
+
+  @param[in]    This                  Indicates a pointer to the calling context.
+  @param[out]   ResourceList          A pointer to an ACPI resource descriptor list that defines the current resources
+                                      used by the device. Type ACPI_RESOURCE_HEADER_PTR is defined in the "Related
+                                      Definitions" below.
+
+  @retval       EFI_SUCCESS           The operation completed successfully
+  @retval       EFI_INVALID_PARAMETER ResourceList is NULL
+**/
+EFI_STATUS
+EFIAPI
+SioGetResources (
+  IN  CONST EFI_SIO_PROTOCOL    *This,
+  OUT ACPI_RESOURCE_HEADER_PTR  *ResourceList
+  );
+
+
+/**
+  Sets the resources for the device.
+
+  @param[in]  This                  Indicates a pointer to the calling context.
+  @param[in]  ResourceList          Pointer to the ACPI resource descriptor list. Type ACPI_RESOURCE_HEADER_PTR
+                                    is defined in the "Related Definitions" section of
+                                    EFI_SIO_PROTOCOL.GetResources().
+
+  @retval     EFI_SUCCESS           The operation completed successfully
+  @retval     EFI_INVALID_PARAMETER ResourceList is invalid
+  @retval     EFI_ACCESS_DENIED     Some of the resources in ResourceList are in use
+**/
+EFI_STATUS
+EFIAPI
+SioSetResources (
+  IN  CONST EFI_SIO_PROTOCOL    *This,
+  IN  ACPI_RESOURCE_HEADER_PTR  ResourceList
+  );
+
+
+/**
+  Provides a collection of resource descriptor lists. Each resource descriptor list in the collection
+  defines a combination of resources that can potentially be used by the device.
+
+  @param[in]  This                      Indicates a pointer to the calling context.
+  @param[out] ResourceCollection        Collection of the resource descriptor lists.
+
+  @retval     EFI_SUCCESS               The operation completed successfully
+  @retval     EFI_INVALID_PARAMETER     ResourceCollection is NULL
+**/
+EFI_STATUS
+EFIAPI
+SioPossibleResources (
+  IN  CONST EFI_SIO_PROTOCOL    *This,
+  OUT ACPI_RESOURCE_HEADER_PTR  *ResourceCollection
+  );
+
+
+/**
+  Provides a low level access to the registers for the Super I/O.
+
+  @param[in]        This                  Indicates a pointer to the calling context.
+  @param[in]        Write                 Specifies the type of the register operation. If this parameter is TRUE,
+                                          Value is interpreted as an input parameter and the operation is a register write.
+                                          If this parameter is FALSE, Value is interpreted as an output parameter and the
+                                          operation is a register read.
+  @param[in]        ExitCfgMode           Exit Configuration Mode Indicator. If this parameter is set to TRUE, the 
+                                          Super I/O driver will turn off configuration mode of the Super I/O prior to returning
+                                          from this function. If this parameter is set to FALSE, the Super I/O driver will
+                                          leave Super I/O in the configuration mode.
+                                          The Super I/O driver must track the current state of the Super I/O and enable the
+                                          configuration mode of Super I/O if necessary prior to register access.
+  @param[in]        Register              Register number.
+  @param[in, out]   Value                 If Write is TRUE, Value is a pointer to the buffer containing the byte of data to be
+                                          written to the Super I/O register. If Write is FALSE, Value is a pointer to the
+                                          destination buffer for the byte of data to be read from the Super I/O register.
+
+  @retval           EFI_SUCCESS           The operation completed successfully
+  @retval           EFI_INVALID_PARAMETER The Value is NULL
+  @retval           EFI_INVALID_PARAMETER Invalid Register number
+**/
+EFI_STATUS
+EFIAPI
+SioRegisterAccess (
+  IN CONST EFI_SIO_PROTOCOL    *This,
+  IN BOOLEAN                   Write,
+  IN BOOLEAN                   ExitCfgMode,
+  IN UINT8                     Register,
+  IN OUT UINT8                 *Value
+  );
+
+
+/**
+  Provides an interface for a table based programming of the Super I/O registers.
+
+  The Modify() function provides an interface for table based programming of the Super I/O
+  registers. This function can be used to perform programming of multiple Super I/O registers with a
+  single function call. For each table entry, the Register is read, its content is bitwise ANDed with
+  AndMask, and then ORed with OrMask before being written back to the Register. The Super
+  I/O driver must track the current state of the Super I/O and enable the configuration mode of Super I/
+  O if necessary prior to table processing. Once the table is processed, the Super I/O device has to be
+  returned to the original state.
+
+  @param[in] This                  Indicates a pointer to the calling context.
+  @param[in] Command               A pointer to an array of NumberOfCommands EFI_SIO_REGISTER_MODIFY
+                                   structures. Each structure specifies a single Super I/O register modify operation.
+                                   Type EFI_SIO_REGISTER_MODIFY is defined in the "Related Definitions" below.
+  @param[in] NumberOfCommands      Number of elements in the Command array.
+
+  @retval    EFI_SUCCESS           The operation completed successfully
+  @retval    EFI_INVALID_PARAMETER Command is NULL
+**/
+EFI_STATUS
+EFIAPI
+SioModify (
+  IN CONST EFI_SIO_PROTOCOL        *This,
+  IN CONST EFI_SIO_REGISTER_MODIFY *Command,
+  IN UINTN                         NumberOfCommands
+  );
+
+#endif
-- 
2.16.2.windows.1