[edk2-devel] [PATCH 1/2] MdePkg: Standalone PCD driver
Michael D Kinney
michael.d.kinney at intel.com
Mon May 24 20:29:38 UTC 2021
Why do we need a new PCD?
Can't we make this the default behavior to only install one instance?
Thanks,
Mike
> -----Original Message-----
> From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Zhiguang Liu
> Sent: Monday, May 24, 2021 2:25 AM
> To: devel at edk2.groups.io
> Cc: Kinney, Michael D <michael.d.kinney at intel.com>; Liming Gao <gaoliming at byosoft.com.cn>
> Subject: [edk2-devel] [PATCH 1/2] MdePkg: Standalone PCD driver
>
> Add a feature PCD to control if the PCD driver is build as standalone mode.
> This way, two mode PCD driver won't share the data base.
>
> Cc: Michael D Kinney <michael.d.kinney at intel.com>
> Cc: Liming Gao <gaoliming at byosoft.com.cn>
> Signed-off-by: Zhiguang Liu <zhiguang.liu at intel.com>
> ---
> MdeModulePkg/Universal/PCD/Dxe/Pcd.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++----------------------
> --
> MdeModulePkg/Universal/PCD/Dxe/Pcd.inf | 16 ++++++++++++----
> MdeModulePkg/Universal/PCD/Dxe/Service.c | 7 ++++++-
> MdePkg/Include/Protocol/Pcd.h | 5 -----
> MdePkg/Include/Protocol/PcdInfo.h | 5 -----
> MdePkg/Library/DxePcdLib/DxePcdLib.c | 24 ++++++++++++++++++++----
> MdePkg/Library/DxePcdLib/DxePcdLib.inf | 16 ++++++++++++----
> MdePkg/Library/DxePcdLib/PayloadPcdLib.inf | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> MdePkg/MdePkg.dec | 12 ++++++++++++
> 9 files changed, 184 insertions(+), 47 deletions(-)
>
> diff --git a/MdeModulePkg/Universal/PCD/Dxe/Pcd.c b/MdeModulePkg/Universal/PCD/Dxe/Pcd.c
> index cdb9b4fac1..dc9c4be022 100644
> --- a/MdeModulePkg/Universal/PCD/Dxe/Pcd.c
> +++ b/MdeModulePkg/Universal/PCD/Dxe/Pcd.c
> @@ -129,34 +129,61 @@ PcdDxeInit (
> //
>
> // Make sure the Pcd Protocol is not already installed in the system
>
> //
>
> + if (FeaturePcdGet (PcdStandalonePcdDatabaseEnable)) {
>
> + ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEdkiiPayloadStandalonePcdProtocolGuid);
>
> + BuildPcdDxeDataBase ();
>
>
>
> - ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gPcdProtocolGuid);
>
> + //
>
> + // Install PCD_PROTOCOL to handle dynamic type PCD
>
> + // Install EFI_PCD_PROTOCOL to handle dynamicEx type PCD
>
> + //
>
> + Status = gBS->InstallMultipleProtocolInterfaces (
>
> + &mPcdHandle,
>
> + &gEdkiiPayloadStandalonePcdProtocolGuid, &mPcdInstance,
>
> + &gEdkiiEfiPayloadStandalonePcdProtocolGuid, &mEfiPcdInstance,
>
> + NULL
>
> + );
>
> + ASSERT_EFI_ERROR (Status);
>
>
>
> - BuildPcdDxeDataBase ();
>
> + //
>
> + // Install GET_PCD_INFO_PROTOCOL to handle dynamic type PCD
>
> + // Install EFI_GET_PCD_INFO_PROTOCOL to handle dynamicEx type PCD
>
> + //
>
> + Status = gBS->InstallMultipleProtocolInterfaces (
>
> + &mPcdHandle,
>
> + &gEdkiiPayloadGetStandalonePcdInfoProtocolGuid, &mGetPcdInfoInstance,
>
> + &gEdkiiEfiPayloadGetStandalonePcdInfoProtocolGuid, &mEfiGetPcdInfoInstance,
>
> + NULL
>
> + );
>
> + ASSERT_EFI_ERROR (Status);
>
> + } else {
>
> + ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gPcdProtocolGuid);
>
> + BuildPcdDxeDataBase ();
>
>
>
> - //
>
> - // Install PCD_PROTOCOL to handle dynamic type PCD
>
> - // Install EFI_PCD_PROTOCOL to handle dynamicEx type PCD
>
> - //
>
> - Status = gBS->InstallMultipleProtocolInterfaces (
>
> - &mPcdHandle,
>
> - &gPcdProtocolGuid, &mPcdInstance,
>
> - &gEfiPcdProtocolGuid, &mEfiPcdInstance,
>
> - NULL
>
> - );
>
> - ASSERT_EFI_ERROR (Status);
>
> + //
>
> + // Install PCD_PROTOCOL to handle dynamic type PCD
>
> + // Install EFI_PCD_PROTOCOL to handle dynamicEx type PCD
>
> + //
>
> + Status = gBS->InstallMultipleProtocolInterfaces (
>
> + &mPcdHandle,
>
> + &gPcdProtocolGuid, &mPcdInstance,
>
> + &gEfiPcdProtocolGuid, &mEfiPcdInstance,
>
> + NULL
>
> + );
>
> + ASSERT_EFI_ERROR (Status);
>
>
>
> - //
>
> - // Install GET_PCD_INFO_PROTOCOL to handle dynamic type PCD
>
> - // Install EFI_GET_PCD_INFO_PROTOCOL to handle dynamicEx type PCD
>
> - //
>
> - Status = gBS->InstallMultipleProtocolInterfaces (
>
> - &mPcdHandle,
>
> - &gGetPcdInfoProtocolGuid, &mGetPcdInfoInstance,
>
> - &gEfiGetPcdInfoProtocolGuid, &mEfiGetPcdInfoInstance,
>
> - NULL
>
> - );
>
> - ASSERT_EFI_ERROR (Status);
>
> + //
>
> + // Install GET_PCD_INFO_PROTOCOL to handle dynamic type PCD
>
> + // Install EFI_GET_PCD_INFO_PROTOCOL to handle dynamicEx type PCD
>
> + //
>
> + Status = gBS->InstallMultipleProtocolInterfaces (
>
> + &mPcdHandle,
>
> + &gGetPcdInfoProtocolGuid, &mGetPcdInfoInstance,
>
> + &gEfiGetPcdInfoProtocolGuid, &mEfiGetPcdInfoInstance,
>
> + NULL
>
> + );
>
> + ASSERT_EFI_ERROR (Status);
>
> + }
>
>
>
> //
>
> // Register callback function upon VariableLockProtocol
>
> diff --git a/MdeModulePkg/Universal/PCD/Dxe/Pcd.inf b/MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
> index eb9f757f14..f3e704f083 100644
> --- a/MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
> +++ b/MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
> @@ -329,10 +329,15 @@
> gEfiMdeModulePkgTokenSpaceGuid ## SOMETIMES_CONSUMES ## GUID
>
>
>
> [Protocols]
>
> - gPcdProtocolGuid ## PRODUCES
>
> - gEfiPcdProtocolGuid ## PRODUCES
>
> - gGetPcdInfoProtocolGuid ## SOMETIMES_PRODUCES
>
> - gEfiGetPcdInfoProtocolGuid ## SOMETIMES_PRODUCES
>
> + gPcdProtocolGuid ## PRODUCES
>
> + gEfiPcdProtocolGuid ## PRODUCES
>
> + gGetPcdInfoProtocolGuid ## SOMETIMES_PRODUCES
>
> + gEfiGetPcdInfoProtocolGuid ## SOMETIMES_PRODUCES
>
> +
>
> + gEdkiiPayloadStandalonePcdProtocolGuid ## PRODUCES
>
> + gEdkiiEfiPayloadStandalonePcdProtocolGuid ## PRODUCES
>
> + gEdkiiPayloadGetStandalonePcdInfoProtocolGuid ## SOMETIMES_PRODUCES
>
> + gEdkiiEfiPayloadGetStandalonePcdInfoProtocolGuid ## SOMETIMES_PRODUCES
>
> ## NOTIFY
>
> ## SOMETIMES_CONSUMES
>
> gEdkiiVariableLockProtocolGuid
>
> @@ -342,6 +347,9 @@
> gEfiMdeModulePkgTokenSpaceGuid.PcdVpdBaseAddress64 ## SOMETIMES_CONSUMES
>
> gEfiMdeModulePkgTokenSpaceGuid.PcdSetNvStoreDefaultId ## SOMETIMES_CONSUMES
>
>
>
> +[FeaturePcd]
>
> + gEfiMdePkgTokenSpaceGuid.PcdStandalonePcdDatabaseEnable ## CONSUMES
>
> +
>
> [Depex]
>
> TRUE
>
>
>
> diff --git a/MdeModulePkg/Universal/PCD/Dxe/Service.c b/MdeModulePkg/Universal/PCD/Dxe/Service.c
> index ea7edc3cbb..fe16ba713b 100644
> --- a/MdeModulePkg/Universal/PCD/Dxe/Service.c
> +++ b/MdeModulePkg/Universal/PCD/Dxe/Service.c
> @@ -861,7 +861,12 @@ BuildPcdDxeDataBase (
> CopyMem (PcdDxeDb, mPcdDatabase.DxeDb, mPcdDatabase.DxeDb->Length);
>
> mPcdDatabase.DxeDb = PcdDxeDb;
>
>
>
> - GuidHob = GetFirstGuidHob (&gPcdDataBaseHobGuid);
>
> + if (FeaturePcdGet (PcdStandalonePcdDatabaseEnable)) {
>
> + GuidHob = NULL;
>
> + } else {
>
> + GuidHob = GetFirstGuidHob (&gPcdDataBaseHobGuid);
>
> + }
>
> +
>
> if (GuidHob != NULL) {
>
>
>
> //
>
> diff --git a/MdePkg/Include/Protocol/Pcd.h b/MdePkg/Include/Protocol/Pcd.h
> index 9cd1a998f8..cfa6ac2360 100644
> --- a/MdePkg/Include/Protocol/Pcd.h
> +++ b/MdePkg/Include/Protocol/Pcd.h
> @@ -17,11 +17,6 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
> #ifndef __PCD_H__
>
> #define __PCD_H__
>
>
>
> -extern EFI_GUID gPcdProtocolGuid;
>
> -
>
> -#define PCD_PROTOCOL_GUID \
>
> - { 0x11b34006, 0xd85b, 0x4d0a, { 0xa2, 0x90, 0xd5, 0xa5, 0x71, 0x31, 0xe, 0xf7 } }
>
> -
>
> #define PCD_INVALID_TOKEN_NUMBER ((UINTN) 0)
>
>
>
>
>
> diff --git a/MdePkg/Include/Protocol/PcdInfo.h b/MdePkg/Include/Protocol/PcdInfo.h
> index b0ec7f6770..5691215c42 100644
> --- a/MdePkg/Include/Protocol/PcdInfo.h
> +++ b/MdePkg/Include/Protocol/PcdInfo.h
> @@ -19,11 +19,6 @@
> #ifndef __PCD_INFO_H__
>
> #define __PCD_INFO_H__
>
>
>
> -extern EFI_GUID gGetPcdInfoProtocolGuid;
>
> -
>
> -#define GET_PCD_INFO_PROTOCOL_GUID \
>
> - { 0x5be40f57, 0xfa68, 0x4610, { 0xbb, 0xbf, 0xe9, 0xc5, 0xfc, 0xda, 0xd3, 0x65 } }
>
> -
>
> ///
>
> /// The forward declaration for GET_PCD_INFO_PROTOCOL.
>
> ///
>
> diff --git a/MdePkg/Library/DxePcdLib/DxePcdLib.c b/MdePkg/Library/DxePcdLib/DxePcdLib.c
> index 2accaeda2c..8a61486832 100644
> --- a/MdePkg/Library/DxePcdLib/DxePcdLib.c
> +++ b/MdePkg/Library/DxePcdLib/DxePcdLib.c
> @@ -43,7 +43,11 @@ GetPiPcdProtocol (
> // PI Pcd protocol defined in PI 1.2 vol3 should be installed before the module
>
> // access DynamicEx type PCD.
>
> //
>
> - Status = gBS->LocateProtocol (&gEfiPcdProtocolGuid, NULL, (VOID **) &mPiPcd);
>
> + if (FeaturePcdGet (PcdStandalonePcdDatabaseEnable)) {
>
> + Status = gBS->LocateProtocol (&gEdkiiEfiPayloadStandalonePcdProtocolGuid, NULL, (VOID **) &mPiPcd);
>
> + } else {
>
> + Status = gBS->LocateProtocol (&gEfiPcdProtocolGuid, NULL, (VOID **) &mPiPcd);
>
> + }
>
> ASSERT_EFI_ERROR (Status);
>
> ASSERT (mPiPcd != NULL);
>
> }
>
> @@ -68,7 +72,11 @@ GetPcdProtocol (
> // PCD protocol need to be installed before the module access Dynamic type PCD.
>
> // But dynamic type PCD is not required in PI 1.2 specification.
>
> //
>
> - Status = gBS->LocateProtocol (&gPcdProtocolGuid, NULL, (VOID **)&mPcd);
>
> + if (FeaturePcdGet (PcdStandalonePcdDatabaseEnable)) {
>
> + Status = gBS->LocateProtocol (&gEdkiiPayloadStandalonePcdProtocolGuid, NULL, (VOID **)&mPcd);
>
> + } else {
>
> + Status = gBS->LocateProtocol (&gPcdProtocolGuid, NULL, (VOID **)&mPcd);
>
> + }
>
> ASSERT_EFI_ERROR (Status);
>
> ASSERT (mPcd != NULL);
>
> }
>
> @@ -88,7 +96,11 @@ GetPiPcdInfoProtocolPointer (
> EFI_STATUS Status;
>
>
>
> if (mPiPcdInfo == NULL) {
>
> - Status = gBS->LocateProtocol (&gEfiGetPcdInfoProtocolGuid, NULL, (VOID **)&mPiPcdInfo);
>
> + if (FeaturePcdGet (PcdStandalonePcdDatabaseEnable)) {
>
> + Status = gBS->LocateProtocol (&gEdkiiEfiPayloadGetStandalonePcdInfoProtocolGuid, NULL, (VOID **)&mPiPcdInfo);
>
> + } else{
>
> + Status = gBS->LocateProtocol (&gEfiGetPcdInfoProtocolGuid, NULL, (VOID **)&mPiPcdInfo);
>
> + }
>
> ASSERT_EFI_ERROR (Status);
>
> ASSERT (mPiPcdInfo != NULL);
>
> }
>
> @@ -108,7 +120,11 @@ GetPcdInfoProtocolPointer (
> EFI_STATUS Status;
>
>
>
> if (mPcdInfo == NULL) {
>
> - Status = gBS->LocateProtocol (&gGetPcdInfoProtocolGuid, NULL, (VOID **)&mPcdInfo);
>
> + if (FeaturePcdGet (PcdStandalonePcdDatabaseEnable)) {
>
> + Status = gBS->LocateProtocol (&gEdkiiPayloadGetStandalonePcdInfoProtocolGuid, NULL, (VOID **)&mPcdInfo);
>
> + } else {
>
> + Status = gBS->LocateProtocol (&gGetPcdInfoProtocolGuid, NULL, (VOID **)&mPcdInfo);
>
> + }
>
> ASSERT_EFI_ERROR (Status);
>
> ASSERT (mPcdInfo != NULL);
>
> }
>
> diff --git a/MdePkg/Library/DxePcdLib/DxePcdLib.inf b/MdePkg/Library/DxePcdLib/DxePcdLib.inf
> index 3d4d21b442..59d9fe4f11 100644
> --- a/MdePkg/Library/DxePcdLib/DxePcdLib.inf
> +++ b/MdePkg/Library/DxePcdLib/DxePcdLib.inf
> @@ -53,10 +53,18 @@
>
>
>
>
> [Protocols]
>
> - gPcdProtocolGuid ## SOMETIMES_CONSUMES
>
> - gEfiPcdProtocolGuid ## CONSUMES
>
> - gGetPcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> - gEfiGetPcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> + gPcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEfiPcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gGetPcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEfiGetPcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> +
>
> + gEdkiiPayloadStandalonePcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEdkiiEfiPayloadStandalonePcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEdkiiPayloadGetStandalonePcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEdkiiEfiPayloadGetStandalonePcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> +
>
> +[FeaturePcd]
>
> + gEfiMdePkgTokenSpaceGuid.PcdStandalonePcdDatabaseEnable ## CONSUMES
>
>
>
> [Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER, Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
>
> gEfiPcdProtocolGuid
>
> diff --git a/MdePkg/Library/DxePcdLib/PayloadPcdLib.inf b/MdePkg/Library/DxePcdLib/PayloadPcdLib.inf
> new file mode 100644
> index 0000000000..e61296e11a
> --- /dev/null
> +++ b/MdePkg/Library/DxePcdLib/PayloadPcdLib.inf
> @@ -0,0 +1,71 @@
> +## @file
>
> +# Instance of PCD Library using PCD Protocol.
>
> +#
>
> +# There are two PCD protocols as follows:
>
> +# 1) PCD_PROTOCOL
>
> +# It is EDKII implementation which support Dynamic/DynamicEx Pcds.
>
> +# 2) EFI_PCD_PROTOCOL
>
> +# It is defined by PI specification 1.2, Vol 3 which only support dynamicEx
>
> +# type Pcd.
>
> +#
>
> +# For dynamicEx type PCD, it is compatible between PCD_PROTOCOL and EFI_PCD_PROTOCOL.
>
> +#
>
> +# This library instance uses the PCD_PROTOCOL to handle dynamic PCD request and use
>
> +# EFI_PCD_PROTOCOL to handle dynamicEx type PCD.
>
> +#
>
> +# Note: A driver of type DXE_RUNTIME_DRIVER and DXE_SMM_DRIVER can only use this DxePcdLib
>
> +# in their initialization without any issues to access Dynamic and DynamicEx PCD. They can't
>
> +# access Dynamic and DynamicEx PCD in the implementation of runtime services and SMI handlers.
>
> +# Because EFI_PCD_PROTOCOL is DXE protocol that is not available in OS runtime phase.
>
> +#
>
> +# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
>
> +#
>
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
>
> +#
>
> +#
>
> +##
>
> +
>
> +[Defines]
>
> + INF_VERSION = 0x00010005
>
> + BASE_NAME = DxePcdLib
>
> + MODULE_UNI_FILE = DxePcdLib.uni
>
> + FILE_GUID = f9af2f38-09e2-4ff1-b661-5d1c19d9f75c
>
> + MODULE_TYPE = DXE_DRIVER
>
> + VERSION_STRING = 1.0
>
> + LIBRARY_CLASS = PcdLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER SMM_CORE UEFI_APPLICATION
> UEFI_DRIVER
>
> +
>
> +#
>
> +# VALID_ARCHITECTURES = IA32 X64 EBC
>
> +#
>
> +
>
> +[Sources]
>
> + DxePcdLib.c
>
> +
>
> +
>
> +[Packages]
>
> + MdePkg/MdePkg.dec
>
> +
>
> +
>
> +[LibraryClasses]
>
> + BaseMemoryLib
>
> + UefiBootServicesTableLib
>
> + DebugLib
>
> +
>
> +
>
> +[Protocols]
>
> + gPcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEfiPcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gGetPcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEfiGetPcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> +
>
> + gEdkiiPayloadStandalonePcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEdkiiEfiPayloadStandalonePcdProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEdkiiPayloadGetStandalonePcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> + gEdkiiEfiPayloadGetStandalonePcdInfoProtocolGuid ## SOMETIMES_CONSUMES
>
> +
>
> +[FeaturePcd]
>
> + gEfiMdePkgTokenSpaceGuid.PcdStandalonePcdDatabaseEnable ## CONSUMES
>
> +
>
> +[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER, Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
>
> + gEdkiiEfiPayloadStandalonePcdProtocolGuid
>
> +
>
> diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
> index b49f88d8e1..44f60e2086 100644
> --- a/MdePkg/MdePkg.dec
> +++ b/MdePkg/MdePkg.dec
> @@ -1000,6 +1000,12 @@
> ## Include/Protocol/PcdInfo.h
>
> gGetPcdInfoProtocolGuid = { 0x5be40f57, 0xfa68, 0x4610, { 0xbb, 0xbf, 0xe9, 0xc5, 0xfc, 0xda, 0xd3, 0x65 } }
>
>
>
> + ## Payload Standalone Pcd Protocol
>
> + gEdkiiPayloadStandalonePcdProtocolGuid = {0x8ef6ff48, 0x2260, 0x5407, {0x0d, 0x18, 0x2e, 0x2c, 0xaa, 0x7d,
> 0xc9, 0x1f}}
>
> + gEdkiiEfiPayloadStandalonePcdProtocolGuid = {0x7e50c422, 0xae76, 0xbdc9, {0x16, 0x66, 0xca, 0x67, 0x95, 0x04,
> 0x4d, 0xea}}
>
> + gEdkiiPayloadGetStandalonePcdInfoProtocolGuid = {0xd7214c03, 0x27e0, 0x5b35, {0xd5, 0xb1, 0xeb, 0x1a, 0x50, 0x14,
> 0x5e, 0x15}}
>
> + gEdkiiEfiPayloadGetStandalonePcdInfoProtocolGuid = {0x1039ecdf, 0x5908, 0xf76c, {0x51, 0xf9, 0xae, 0x09, 0xc5, 0xa9,
> 0x68, 0x9e}}
>
> +
>
> #
>
> # Protocols defined in PI1.0.
>
> #
>
> @@ -1945,6 +1951,12 @@
> # @Prompt Validate ORDERED_COLLECTION structure
>
> gEfiMdePkgTokenSpaceGuid.PcdValidateOrderedCollection|FALSE|BOOLEAN|0x0000002a
>
>
>
> + ## Indicates if the standalone PCD database is enabled for Payload.<BR><BR>
>
> + # TRUE - Enable tandalone PCD database is enabled for Payload.<BR>
>
> + # FALSE - Disable tandalone PCD database is enabled for Payload.<BR>
>
> + # @Prompt Enable tandalone PCD database is enabled for Payload.
>
> + gEfiMdePkgTokenSpaceGuid.PcdStandalonePcdDatabaseEnable|FALSE|BOOLEAN|0x0000002e
>
> +
>
> [PcdsFixedAtBuild]
>
> ## Status code value for indicating a watchdog timer has expired.
>
> # EFI_COMPUTING_UNIT_HOST_PROCESSOR | EFI_CU_HP_EC_TIMER_EXPIRED
>
> --
> 2.30.0.windows.2
>
>
>
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