[edk2-platforms][PATCH v4 31/31] AmpereAltraPkg: Add configuration screen for Watchdog timer

["Nhi Pham" <nhi@os.amperecomputing.com>]

From: Vu Nguyen <vunguyen@os.amperecomputing.com>

There are secure and non-secure watchdog timers supported in the Mt.
Jade system. They are used to monitor the system booting like system
firmware, UEFI, and OS. The system will be reset if the timer expires.
So, this patch adds the configuration screen for the watchdog timer
which provides options to configure the timeout of these timers.

By default, the values of these options are 5 minutes.

Cc: Thang Nguyen <thang@os.amperecomputing.com>
Cc: Chuong Tran <chuong@os.amperecomputing.com>
Cc: Phong Vo <phong@os.amperecomputing.com>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>

Signed-off-by: Nhi Pham <nhi@os.amperecomputing.com>
---
 Silicon/Ampere/AmpereAltraPkg/AmpereAltraPkg.dec                                     |   3 +
 Platform/Ampere/JadePkg/Jade.dsc                                                     |   1 +
 Platform/Ampere/JadePkg/Jade.fdf                                                     |   1 +
 Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.inf        |  50 +++
 Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.h          |  73 +++
 Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigNVDataStruct.h |  27 ++
 Silicon/Ampere/AmpereAltraPkg/Include/Guid/WatchdogConfigHii.h                       |  19 +
 Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigVfr.vfr        |  58 +++
 Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.c          | 470 ++++++++++++++++++++
 Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigStrings.uni    |  26 ++
 10 files changed, 728 insertions(+)

diff --git a/Silicon/Ampere/AmpereAltraPkg/AmpereAltraPkg.dec b/Silicon/Ampere/AmpereAltraPkg/AmpereAltraPkg.dec
index d795c9229691..d43bf1a6f296 100644
--- a/Silicon/Ampere/AmpereAltraPkg/AmpereAltraPkg.dec
+++ b/Silicon/Ampere/AmpereAltraPkg/AmpereAltraPkg.dec
@@ -70,3 +70,6 @@ [Guids]
 
   ## Include/Guid/AcpiConfigHii.h
   gAcpiConfigFormSetGuid = { 0x0ceb6764, 0xd415, 0x4b01, { 0xa8, 0x43, 0xd1, 0x01, 0xbc, 0xb0, 0xd8, 0x29 } }
+
+  ## Include/Guid/WatchdogConfigHii.h
+  gWatchdogConfigFormSetGuid   = { 0xC3F8EC6E, 0x95EE, 0x460C, { 0xA4, 0x8D, 0xEA, 0x54, 0x2F, 0xFF, 0x01, 0x61 } }
diff --git a/Platform/Ampere/JadePkg/Jade.dsc b/Platform/Ampere/JadePkg/Jade.dsc
index 980f431fc4de..eea3eec7f529 100644
--- a/Platform/Ampere/JadePkg/Jade.dsc
+++ b/Platform/Ampere/JadePkg/Jade.dsc
@@ -191,3 +191,4 @@ [Components.common]
   Silicon/Ampere/AmpereAltraPkg/Drivers/CpuConfigDxe/CpuConfigDxe.inf
   Silicon/Ampere/AmpereAltraPkg/Drivers/AcpiConfigDxe/AcpiConfigDxe.inf
   Silicon/Ampere/AmpereAltraPkg/Drivers/RasConfigDxe/RasConfigDxe.inf
+  Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.inf
diff --git a/Platform/Ampere/JadePkg/Jade.fdf b/Platform/Ampere/JadePkg/Jade.fdf
index 1743c12dd68e..1a2b172cb776 100644
--- a/Platform/Ampere/JadePkg/Jade.fdf
+++ b/Platform/Ampere/JadePkg/Jade.fdf
@@ -361,5 +361,6 @@ [FV.FvMain]
   INF Silicon/Ampere/AmpereAltraPkg/Drivers/CpuConfigDxe/CpuConfigDxe.inf
   INF Silicon/Ampere/AmpereAltraPkg/Drivers/AcpiConfigDxe/AcpiConfigDxe.inf
   INF Silicon/Ampere/AmpereAltraPkg/Drivers/RasConfigDxe/RasConfigDxe.inf
+  INF Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.inf
 
 !include Silicon/Ampere/AmpereSiliconPkg/FvRules.fdf.inc
diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.inf b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.inf
new file mode 100644
index 000000000000..3ed37bfb15da
--- /dev/null
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.inf
@@ -0,0 +1,50 @@
+## @file
+#
+# Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x0001001B
+  BASE_NAME                      = WatchdogConfigDxe
+  FILE_GUID                      = 135A0CA5-4851-4EF5-9E1A-C6E4610C39A9
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = WatchdogConfigInitialize
+
+[Sources.common]
+  WatchdogConfigNVDataStruct.h
+  WatchdogConfigVfr.vfr
+  WatchdogConfigStrings.uni
+  WatchdogConfigDxe.c
+  WatchdogConfigDxe.h
+
+[Packages]
+  MdeModulePkg/MdeModulePkg.dec
+  MdePkg/MdePkg.dec
+  Silicon/Ampere/AmpereAltraPkg/AmpereAltraPkg.dec
+  Silicon/Ampere/AmpereSiliconPkg/AmpereSiliconPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  DevicePathLib
+  HiiLib
+  NVParamLib
+  PrintLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+
+[Guids]
+  gPlatformManagerFormsetGuid
+  gWatchdogConfigFormSetGuid
+
+[Protocols]
+  gEfiDevicePathProtocolGuid                    ## CONSUMES
+  gEfiHiiConfigRoutingProtocolGuid              ## CONSUMES
+  gEfiHiiConfigAccessProtocolGuid               ## PRODUCES
+
+[Depex]
+  TRUE
diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.h b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.h
new file mode 100644
index 000000000000..95fc6c8f6269
--- /dev/null
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.h
@@ -0,0 +1,73 @@
+/** @file
+
+  Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef WATCHDOG_CONFIG_DXE_H_
+#define WATCHDOG_CONFIG_DXE_H_
+
+#include <Uefi.h>
+
+#include <Protocol/HiiConfigAccess.h>
+#include <Protocol/HiiConfigRouting.h>
+
+#include "WatchdogConfigNVDataStruct.h"
+
+//
+// This is the generated IFR binary data for each formset defined in VFR.
+//
+extern UINT8 WatchdogConfigVfrBin[];
+
+//
+// This is the generated String package data for all .UNI files.
+//
+extern UINT8 WatchdogConfigDxeStrings[];
+
+#define WATCHDOG_CONFIG_PRIVATE_SIGNATURE SIGNATURE_32 ('W', 'D', 'T', 'C')
+
+typedef struct {
+  UINTN Signature;
+
+  EFI_HANDLE                    DriverHandle;
+  EFI_HII_HANDLE                HiiHandle;
+  WATCHDOG_CONFIG_VARSTORE_DATA Configuration;
+
+  //
+  // Consumed protocol
+  //
+  EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
+
+  //
+  // Produced protocol
+  //
+  EFI_HII_CONFIG_ACCESS_PROTOCOL ConfigAccess;
+} WATCHDOG_CONFIG_PRIVATE_DATA;
+
+#define WATCHDOG_CONFIG_PRIVATE_FROM_THIS(a)  CR (a, WATCHDOG_CONFIG_PRIVATE_DATA, ConfigAccess, WATCHDOG_CONFIG_PRIVATE_SIGNATURE)
+
+#pragma pack(1)
+
+///
+/// HII specific Vendor Device Path definition.
+///
+typedef struct {
+  VENDOR_DEVICE_PATH       VendorDevicePath;
+  EFI_DEVICE_PATH_PROTOCOL End;
+} HII_VENDOR_DEVICE_PATH;
+
+#pragma pack()
+
+EFI_STATUS
+WatchdogConfigNvParamSet (
+  IN WATCHDOG_CONFIG_VARSTORE_DATA *VarStoreConfig
+  );
+
+EFI_STATUS
+WatchdogConfigNvParamGet (
+  OUT WATCHDOG_CONFIG_VARSTORE_DATA *VarStoreConfig
+  );
+
+#endif /* WATCHDOG_CONFIG_DXE_H_ */
diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigNVDataStruct.h b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigNVDataStruct.h
new file mode 100644
index 000000000000..470a2821ffe7
--- /dev/null
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigNVDataStruct.h
@@ -0,0 +1,27 @@
+/** @file
+
+  Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef WATCHDOG_CONFIG_NV_DATA_STRUCT_H_
+#define WATCHDOG_CONFIG_NV_DATA_STRUCT_H_
+
+#include <Guid/WatchdogConfigHii.h>
+
+#define WATCHDOG_CONFIG_VARSTORE_ID       0x1234
+#define WATCHDOG_CONFIG_FORM_ID           0x1235
+
+#define NWDT_UEFI_DEFAULT_VALUE           300 // 5 minutes
+#define SWDT_DEFAULT_VALUE                300 // 5 minutes
+
+#pragma pack(1)
+typedef struct {
+  UINT32 WatchdogTimerUEFITimeout;
+  UINT32 SecureWatchdogTimerTimeout;
+} WATCHDOG_CONFIG_VARSTORE_DATA;
+#pragma pack()
+
+#endif /* WATCHDOG_CONFIG_NV_DATA_STRUCT_H_ */
diff --git a/Silicon/Ampere/AmpereAltraPkg/Include/Guid/WatchdogConfigHii.h b/Silicon/Ampere/AmpereAltraPkg/Include/Guid/WatchdogConfigHii.h
new file mode 100644
index 000000000000..16319d61a759
--- /dev/null
+++ b/Silicon/Ampere/AmpereAltraPkg/Include/Guid/WatchdogConfigHii.h
@@ -0,0 +1,19 @@
+/** @file
+
+  Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef WATCHDOG_CONFIG_HII_H_
+#define WATCHDOG_CONFIG_HII_H_
+
+#define WATCHDOG_CONFIG_FORMSET_GUID \
+  { \
+    0xC3F8EC6E, 0x95EE, 0x460C, { 0xA4, 0x8D, 0xEA, 0x54, 0x2F, 0xFF, 0x01, 0x61 } \
+  }
+
+extern EFI_GUID gWatchdogConfigFormSetGuid;
+
+#endif /* WATCHDOG_CONFIG_HII_H_ */
diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigVfr.vfr b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigVfr.vfr
new file mode 100644
index 000000000000..48f2aef227f6
--- /dev/null
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigVfr.vfr
@@ -0,0 +1,58 @@
+/** @file
+
+  Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include "WatchdogConfigNVDataStruct.h"
+
+formset
+  guid      = WATCHDOG_CONFIG_FORMSET_GUID,
+  title     = STRING_TOKEN(STR_WATCHDOG_CONFIG_FORM),
+  help      = STRING_TOKEN(STR_WATCHDOG_CONFIG_FORM_HELP),
+  classguid = gPlatformManagerFormsetGuid,
+
+  //
+  // Define a variable Storage
+  //
+  varstore WATCHDOG_CONFIG_VARSTORE_DATA,
+    varid   = WATCHDOG_CONFIG_VARSTORE_ID,
+    name    = WatchdogConfigNVData,
+    guid    = WATCHDOG_CONFIG_FORMSET_GUID;
+
+  form
+    formid = WATCHDOG_CONFIG_FORM_ID,
+    title  = STRING_TOKEN(STR_WATCHDOG_CONFIG_FORM);
+    subtitle text = STRING_TOKEN(STR_WATCHDOG_CONFIG_FORM_HELP);
+
+    oneof varid = WatchdogConfigNVData.WatchdogTimerUEFITimeout,
+      prompt      = STRING_TOKEN(STR_NWDT_TIMEOUT_UEFI),
+      help        = STRING_TOKEN(STR_NWDT_TIMEOUT_UEFI_HELP),
+      flags       = RESET_REQUIRED,
+      option text = STRING_TOKEN (STR_WDT_TIME_DISABLE), value = 0, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_5MIN), value = 300, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_6MIN), value = 360, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_10MIN), value = 600, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_15MIN), value = 900, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_20MIN), value = 1200, flags = 0;
+      default = NWDT_UEFI_DEFAULT_VALUE,
+    endoneof;
+
+    oneof varid = WatchdogConfigNVData.SecureWatchdogTimerTimeout,
+      prompt      = STRING_TOKEN(STR_SWDT_TIMEOUT),
+      help        = STRING_TOKEN(STR_SWDT_TIMEOUT_HELP),
+      flags       = RESET_REQUIRED,
+      option text = STRING_TOKEN (STR_WDT_TIME_DISABLE), value = 0, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_5MIN), value = 300, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_6MIN), value = 360, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_10MIN), value = 600, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_15MIN), value = 900, flags = 0;
+      option text = STRING_TOKEN (STR_WDT_TIME_20MIN), value = 1200, flags = 0;
+      default = SWDT_DEFAULT_VALUE,
+    endoneof;
+
+  endform;
+
+endformset;
diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.c b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.c
new file mode 100644
index 000000000000..004a605c2f21
--- /dev/null
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigDxe.c
@@ -0,0 +1,470 @@
+/** @file
+
+  Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/HiiLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/NVParamLib.h>
+#include <Library/PrintLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <NVParamDef.h>
+
+#include "WatchdogConfigDxe.h"
+
+CHAR16 WatchDogConfigVarstoreDataName[] = L"WatchdogConfigNVData";
+
+EFI_HANDLE                   mDriverHandle = NULL;
+WATCHDOG_CONFIG_PRIVATE_DATA *mPrivateData = NULL;
+
+HII_VENDOR_DEVICE_PATH mWatchdogConfigHiiVendorDevicePath = {
+  {
+    {
+      HARDWARE_DEVICE_PATH,
+      HW_VENDOR_DP,
+      {
+        (UINT8)(sizeof (VENDOR_DEVICE_PATH)),
+        (UINT8)((sizeof (VENDOR_DEVICE_PATH)) >> 8)
+      }
+    },
+    WATCHDOG_CONFIG_FORMSET_GUID
+  },
+  {
+    END_DEVICE_PATH_TYPE,
+    END_ENTIRE_DEVICE_PATH_SUBTYPE,
+    {
+      (UINT8)(END_DEVICE_PATH_LENGTH),
+      (UINT8)((END_DEVICE_PATH_LENGTH) >> 8)
+    }
+  }
+};
+
+EFI_STATUS
+WatchdogConfigNvParamGet (
+  OUT WATCHDOG_CONFIG_VARSTORE_DATA *VarStoreConfig
+  )
+{
+  EFI_STATUS Status;
+  UINT32     Value;
+  BOOLEAN    SetDefault;
+
+  SetDefault = FALSE;
+  Status = NVParamGet (
+             NV_SI_WDT_BIOS_EXP_MINS,
+             NV_PERM_ATF | NV_PERM_BIOS | NV_PERM_MANU | NV_PERM_BMC,
+             &Value
+             );
+  if (EFI_ERROR (Status)) {
+    VarStoreConfig->WatchdogTimerUEFITimeout = NWDT_UEFI_DEFAULT_VALUE;
+    if (Status == EFI_NOT_FOUND) {
+      SetDefault = TRUE;
+    } else {
+      ASSERT (FALSE);
+    }
+  } else {
+    VarStoreConfig->WatchdogTimerUEFITimeout = Value * 60;
+  }
+
+  Status = NVParamGet (
+             NV_SI_SEC_WDT_BIOS_EXP_MINS,
+             NV_PERM_ATF | NV_PERM_BIOS | NV_PERM_MANU | NV_PERM_BMC,
+             &Value
+             );
+  if (EFI_ERROR (Status)) {
+    VarStoreConfig->SecureWatchdogTimerTimeout = SWDT_DEFAULT_VALUE;
+    if (Status == EFI_NOT_FOUND) {
+      SetDefault = TRUE;
+    } else {
+      ASSERT (FALSE);
+    }
+  } else {
+    VarStoreConfig->SecureWatchdogTimerTimeout = Value;
+  }
+
+  if (SetDefault) {
+    WatchdogConfigNvParamSet (VarStoreConfig);
+  }
+
+  return EFI_SUCCESS;
+}
+
+EFI_STATUS
+WatchdogConfigNvParamSet (
+  IN WATCHDOG_CONFIG_VARSTORE_DATA *VarStoreConfig
+  )
+{
+  EFI_STATUS Status;
+  UINT32     Value;
+
+  Status = NVParamGet (
+             NV_SI_WDT_BIOS_EXP_MINS,
+             NV_PERM_ATF | NV_PERM_BIOS | NV_PERM_MANU | NV_PERM_BMC,
+             &Value
+             );
+  if (EFI_ERROR (Status)
+      || Value != (VarStoreConfig->WatchdogTimerUEFITimeout / 60))
+  {
+    Status = NVParamSet (
+               NV_SI_WDT_BIOS_EXP_MINS,
+               NV_PERM_ATF | NV_PERM_BIOS | NV_PERM_MANU | NV_PERM_BMC,
+               NV_PERM_BIOS | NV_PERM_MANU,
+               (VarStoreConfig->WatchdogTimerUEFITimeout / 60)
+               );
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+  }
+
+  Status = NVParamGet (
+             NV_SI_SEC_WDT_BIOS_EXP_MINS,
+             NV_PERM_ATF | NV_PERM_BIOS | NV_PERM_MANU | NV_PERM_BMC,
+             &Value
+             );
+  if (EFI_ERROR (Status)
+      || Value != VarStoreConfig->SecureWatchdogTimerTimeout)
+  {
+    Status = NVParamSet (
+               NV_SI_SEC_WDT_BIOS_EXP_MINS,
+               NV_PERM_ATF | NV_PERM_BIOS | NV_PERM_MANU | NV_PERM_BMC,
+               NV_PERM_BIOS | NV_PERM_MANU,
+               VarStoreConfig->SecureWatchdogTimerTimeout
+               );
+    if (EFI_ERROR (Status)) {
+      return Status;
+    }
+  }
+
+  return EFI_SUCCESS;
+}
+
+/**
+  This function allows a caller to extract the current configuration for one
+  or more named elements from the target driver.
+
+  @param  This                   Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
+  @param  Request                A null-terminated Unicode string in
+                                 <ConfigRequest> format.
+  @param  Progress               On   return, points to a character in the Request
+                                 string. Points to the string's null terminator if
+                                 request was successful. Points to the most recent
+                                 '&' before the first failing name/value pair (or
+                                 the beginning of the string if the failure is in
+                                 the first name/value pair) if the request was not
+                                 successful.
+  @param  Results                A null-terminated Unicode string in
+                                 <ConfigAltResp> format which has all values filled
+                                 in for the names in the Request string. String to
+                                 be allocated by the called function.
+
+  @retval EFI_SUCCESS            The Results is filled with the requested values.
+  @retval EFI_OUT_OF_RESOURCES   Not enough memory to store the results.
+  @retval EFI_INVALID_PARAMETER  Request is illegal syntax, or unknown name.
+  @retval EFI_NOT_FOUND          Routing data doesn't match any storage in this
+                                 driver.
+
+**/
+EFI_STATUS
+EFIAPI
+WatchdogConfigExtractConfig (
+  IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
+  IN CONST EFI_STRING                     Request,
+  OUT      EFI_STRING                     *Progress,
+  OUT      EFI_STRING                     *Results
+  )
+{
+  EFI_STATUS                      Status;
+  UINTN                           BufferSize;
+  WATCHDOG_CONFIG_PRIVATE_DATA    *PrivateData;
+  EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
+  EFI_STRING                      ConfigRequest;
+  EFI_STRING                      ConfigRequestHdr;
+  UINTN                           Size;
+  BOOLEAN                         AllocatedRequest;
+
+  if (Progress == NULL || Results == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  //
+  // Initialize the local variables.
+  //
+  ConfigRequestHdr  = NULL;
+  ConfigRequest     = NULL;
+  Size              = 0;
+  *Progress         = Request;
+  AllocatedRequest  = FALSE;
+
+  if ((Request != NULL) && !HiiIsConfigHdrMatch (Request, &gWatchdogConfigFormSetGuid, WatchDogConfigVarstoreDataName)) {
+    return EFI_NOT_FOUND;
+  }
+
+  PrivateData = WATCHDOG_CONFIG_PRIVATE_FROM_THIS (This);
+  HiiConfigRouting = PrivateData->HiiConfigRouting;
+
+  //
+  // Get current setting from NVParam.
+  //
+  Status = WatchdogConfigNvParamGet (&PrivateData->Configuration);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Convert buffer data to <ConfigResp> by helper function BlockToConfig()
+  //
+  BufferSize = sizeof (WATCHDOG_CONFIG_VARSTORE_DATA);
+  ConfigRequest = Request;
+  if ((Request == NULL) || (StrStr (Request, L"OFFSET") == NULL)) {
+    //
+    // Request has no request element, construct full request string.
+    // Allocate and fill a buffer large enough to hold the <ConfigHdr> template
+    // followed by "&OFFSET=0&WIDTH=WWWWWWWWWWWWWWWW" followed by a Null-terminator
+    //
+    ConfigRequestHdr = HiiConstructConfigHdr (&gWatchdogConfigFormSetGuid, WatchDogConfigVarstoreDataName, PrivateData->DriverHandle);
+    Size = (StrLen (ConfigRequestHdr) + 32 + 1) * sizeof (CHAR16);
+    ConfigRequest = AllocateZeroPool (Size);
+    ASSERT (ConfigRequest != NULL);
+    if (ConfigRequest == NULL) {
+      return EFI_OUT_OF_RESOURCES;
+    }
+    AllocatedRequest = TRUE;
+    UnicodeSPrint (ConfigRequest, Size, L"%s&OFFSET=0&WIDTH=%016LX", ConfigRequestHdr, (UINT64)BufferSize);
+    FreePool (ConfigRequestHdr);
+  }
+
+  //
+  // Convert buffer data to <ConfigResp> by helper function BlockToConfig()
+  //
+  Status = HiiConfigRouting->BlockToConfig (
+                               HiiConfigRouting,
+                               ConfigRequest,
+                               (UINT8 *)&PrivateData->Configuration,
+                               BufferSize,
+                               Results,
+                               Progress
+                               );
+
+  //
+  // Free the allocated config request string.
+  //
+  if (AllocatedRequest) {
+    FreePool (ConfigRequest);
+    ConfigRequest = NULL;
+  }
+
+  //
+  // Set Progress string to the original request string.
+  //
+  if (Request == NULL) {
+    *Progress = NULL;
+  } else if (StrStr (Request, L"OFFSET") == NULL) {
+    *Progress = Request + StrLen (Request);
+  }
+
+  return Status;
+}
+
+/**
+  This function processes the results of changes in configuration.
+
+  @param  This                   Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
+  @param  Configuration          A null-terminated Unicode string in <ConfigResp>
+                                 format.
+  @param  Progress               A pointer to a string filled in with the offset of
+                                 the most recent '&' before the first failing
+                                 name/value pair (or the beginning of the string if
+                                 the failure is in the first name/value pair) or
+                                 the terminating NULL if all was successful.
+
+  @retval EFI_SUCCESS            The Results is processed successfully.
+  @retval EFI_INVALID_PARAMETER  Configuration is NULL.
+  @retval EFI_NOT_FOUND          Routing data doesn't match any storage in this
+                                 driver.
+
+**/
+EFI_STATUS
+EFIAPI
+WatchdogConfigRouteConfig (
+  IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
+  IN CONST EFI_STRING                     Configuration,
+  OUT      EFI_STRING                     *Progress
+  )
+{
+  EFI_STATUS                      Status;
+  UINTN                           BufferSize;
+  WATCHDOG_CONFIG_PRIVATE_DATA    *PrivateData;
+  EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
+
+  if (Configuration == NULL || Progress == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  PrivateData = WATCHDOG_CONFIG_PRIVATE_FROM_THIS (This);
+  HiiConfigRouting = PrivateData->HiiConfigRouting;
+  *Progress = Configuration;
+
+  //
+  // Check routing data in <ConfigHdr>.
+  // Note: if only one Storage is used, then this checking could be skipped.
+  //
+  if (!HiiIsConfigHdrMatch (Configuration, &gWatchdogConfigFormSetGuid, WatchDogConfigVarstoreDataName)) {
+    return EFI_NOT_FOUND;
+  }
+
+  //
+  // Get configuration data from NVParam
+  //
+  Status = WatchdogConfigNvParamGet (&PrivateData->Configuration);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Convert <ConfigResp> to buffer data by helper function ConfigToBlock()
+  //
+  BufferSize = sizeof (WATCHDOG_CONFIG_VARSTORE_DATA);
+  Status = HiiConfigRouting->ConfigToBlock (
+                               HiiConfigRouting,
+                               Configuration,
+                               (UINT8 *)&PrivateData->Configuration,
+                               &BufferSize,
+                               Progress
+                               );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  //
+  // Store configuration data back to NVParam
+  //
+  Status = WatchdogConfigNvParamSet (&PrivateData->Configuration);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  return Status;
+}
+
+/**
+  This function processes the results of changes in configuration.
+
+  @param  This                   Points to the EFI_HII_CONFIG_ACCESS_PROTOCOL.
+  @param  Action                 Specifies the type of action taken by the browser.
+  @param  QuestionId             A unique value which is sent to the original
+                                 exporting driver so that it can identify the type
+                                 of data to expect.
+  @param  Type                   The type of value for the question.
+  @param  Value                  A pointer to the data being sent to the original
+                                 exporting driver.
+  @param  ActionRequest          On return, points to the action requested by the
+                                 callback function.
+
+  @retval  EFI_SUCCESS           The callback successfully handled the action.
+  @retval  EFI_INVALID_PARAMETER The setup browser call this function with invalid parameters.
+
+**/
+EFI_STATUS
+EFIAPI
+WatchdogConfigCallback (
+  IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This,
+  IN       EFI_BROWSER_ACTION             Action,
+  IN       EFI_QUESTION_ID                QuestionId,
+  IN       UINT8                          Type,
+  IN       EFI_IFR_TYPE_VALUE             *Value,
+  OUT      EFI_BROWSER_ACTION_REQUEST     *ActionRequest
+  )
+{
+  if (Action != EFI_BROWSER_ACTION_CHANGING) {
+    //
+    // Do nothing for other UEFI Action. Only do call back when data is changed.
+    //
+    return EFI_UNSUPPORTED;
+  }
+  if (((Value == NULL)
+       && (Action != EFI_BROWSER_ACTION_FORM_OPEN)
+       && (Action != EFI_BROWSER_ACTION_FORM_CLOSE))
+      || (ActionRequest == NULL))
+  {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  return EFI_SUCCESS;
+}
+
+EFI_STATUS
+WatchdogConfigInitialize (
+  IN EFI_HANDLE       ImageHandle,
+  IN EFI_SYSTEM_TABLE *SystemTable
+  )
+{
+  EFI_STATUS                      Status;
+  EFI_HII_HANDLE                  HiiHandle;
+  EFI_HII_CONFIG_ROUTING_PROTOCOL *HiiConfigRouting;
+
+  //
+  // Initialize driver private data
+  //
+  mPrivateData = AllocateZeroPool (sizeof (WATCHDOG_CONFIG_PRIVATE_DATA));
+  if (mPrivateData == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  mPrivateData->Signature = WATCHDOG_CONFIG_PRIVATE_SIGNATURE;
+
+  mPrivateData->ConfigAccess.ExtractConfig = WatchdogConfigExtractConfig;
+  mPrivateData->ConfigAccess.RouteConfig = WatchdogConfigRouteConfig;
+  mPrivateData->ConfigAccess.Callback = WatchdogConfigCallback;
+
+  //
+  // Locate ConfigRouting protocol
+  //
+  Status = gBS->LocateProtocol (&gEfiHiiConfigRoutingProtocolGuid, NULL, (VOID **)&HiiConfigRouting);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+  mPrivateData->HiiConfigRouting = HiiConfigRouting;
+
+  Status = gBS->InstallMultipleProtocolInterfaces (
+                  &mDriverHandle,
+                  &gEfiDevicePathProtocolGuid,
+                  &mWatchdogConfigHiiVendorDevicePath,
+                  &gEfiHiiConfigAccessProtocolGuid,
+                  &mPrivateData->ConfigAccess,
+                  NULL
+                  );
+  ASSERT_EFI_ERROR (Status);
+
+  mPrivateData->DriverHandle = mDriverHandle;
+
+  //
+  // Publish our HII data
+  //
+  HiiHandle = HiiAddPackages (
+                &gWatchdogConfigFormSetGuid,
+                mDriverHandle,
+                WatchdogConfigDxeStrings,
+                WatchdogConfigVfrBin,
+                NULL
+                );
+  if (HiiHandle == NULL) {
+    gBS->UninstallMultipleProtocolInterfaces (
+           mDriverHandle,
+           &gEfiDevicePathProtocolGuid,
+           &mWatchdogConfigHiiVendorDevicePath,
+           &gEfiHiiConfigAccessProtocolGuid,
+           &mPrivateData->ConfigAccess,
+           NULL
+           );
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  mPrivateData->HiiHandle = HiiHandle;
+
+  return EFI_SUCCESS;
+}
diff --git a/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigStrings.uni b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigStrings.uni
new file mode 100644
index 000000000000..1d0f820e456f
--- /dev/null
+++ b/Silicon/Ampere/AmpereAltraPkg/Drivers/WatchdogConfigDxe/WatchdogConfigStrings.uni
@@ -0,0 +1,26 @@
+//
+// Copyright (c) 2020 - 2021, Ampere Computing LLC. All rights reserved.<BR>
+//
+// SPDX-License-Identifier: BSD-2-Clause-Patent
+//
+
+#langdef en-US  "English"
+
+#string STR_WATCHDOG_CONFIG_FORM        #language en-US "Watchdog Configuration"
+#string STR_WATCHDOG_CONFIG_FORM_HELP   #language en-US "Watchdog Configuration"
+
+#string STR_WDT_TIME_DISABLE            #language en-US  "Disabled"
+#string STR_WDT_TIME_3MIN               #language en-US  "3 minutes"
+#string STR_WDT_TIME_4MIN               #language en-US  "4 minutes"
+#string STR_WDT_TIME_5MIN               #language en-US  "5 minutes"
+#string STR_WDT_TIME_6MIN               #language en-US  "6 minutes"
+#string STR_WDT_TIME_10MIN              #language en-US  "10 minutes"
+#string STR_WDT_TIME_15MIN              #language en-US  "15 minutes"
+#string STR_WDT_TIME_20MIN              #language en-US  "20 minutes"
+
+#string STR_NWDT_TIMEOUT_OS             #language en-US  "OS Watchdog Timeout"
+#string STR_NWDT_TIMEOUT_OS_HELP        #language en-US  "Timeout when boot OS."
+#string STR_NWDT_TIMEOUT_UEFI           #language en-US  "UEFI Watchdog Timeout"
+#string STR_NWDT_TIMEOUT_UEFI_HELP      #language en-US  "Timeout when boot UEFI"
+#string STR_SWDT_TIMEOUT                #language en-US  "Secure Watchdog Timeout"
+#string STR_SWDT_TIMEOUT_HELP           #language en-US  "Timeout when SCP will reset system if it doesn't receive response from ARMv8."
-- 
2.17.1