[edk2-platforms][PATCH V1 08/15] Platform/Loongson: Support PEI phase.

["xianglai" <lixianglai@loongson.cn>]

Platform PEI module for LoongArch platform initialization.

Signed-off-by: xianglai li <lixianglai@loongson.cn>
---
 .../Loongson/LoongArchQemuPkg/Loongson.dec    |  22 ++
 .../Loongson/LoongArchQemuPkg/Loongson.dsc    |  66 ++++-
 .../Loongson/LoongArchQemuPkg/Loongson.fdf    |  51 ++++
 .../LoongArchQemuPkg/PlatformPei/Fv.c         |  61 ++++
 .../LoongArchQemuPkg/PlatformPei/MemDetect.c  | 116 ++++++++
 .../LoongArchQemuPkg/PlatformPei/Platform.c   | 264 ++++++++++++++++++
 .../LoongArchQemuPkg/PlatformPei/Platform.h   |  87 ++++++
 .../PlatformPei/PlatformPei.inf               |  72 +++++
 8 files changed, 738 insertions(+), 1 deletion(-)
 create mode 100644 Platform/Loongson/LoongArchQemuPkg/PlatformPei/Fv.c
 create mode 100644 Platform/Loongson/LoongArchQemuPkg/PlatformPei/MemDetect.c
 create mode 100644 Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.c
 create mode 100644 Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.h
 create mode 100644 Platform/Loongson/LoongArchQemuPkg/PlatformPei/PlatformPei.inf

diff --git a/Platform/Loongson/LoongArchQemuPkg/Loongson.dec b/Platform/Loongson/LoongArchQemuPkg/Loongson.dec
index 248b668fd1..aca53583f1 100644
--- a/Platform/Loongson/LoongArchQemuPkg/Loongson.dec
+++ b/Platform/Loongson/LoongArchQemuPkg/Loongson.dec
@@ -30,9 +30,31 @@
 [PcdsFixedAtBuild, PcdsDynamic]
   gLoongArchQemuPkgTokenSpaceGuid.PcdFlashPeiFvBase|0x0|UINT64|0x00000003
   gLoongArchQemuPkgTokenSpaceGuid.PcdFlashPeiFvSize|0x0|UINT32|0x00000004
+  gLoongArchQemuPkgTokenSpaceGuid.PcdFlashDxeFvBase|0x0|UINT64|0x00000008
+  gLoongArchQemuPkgTokenSpaceGuid.PcdFlashDxeFvSize|0x0|UINT32|0x00000009
   gLoongArchQemuPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableSize|0|UINT32|0x00000016
   gLoongArchQemuPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableAddress|0|UINT32|0x00000017
+  gLoongArchQemuPkgTokenSpaceGuid.PcdDeviceTreeBase|0x0|UINT64|0x00000018
+  gLoongArchQemuPkgTokenSpaceGuid.PcdDeviceTreePadding|256|UINT32|0x00000019
+
   gLoongArchQemuPkgTokenSpaceGuid.PcdSecPeiTempRamBase|0|UINT64|0x0000001c
   gLoongArchQemuPkgTokenSpaceGuid.PcdSecPeiTempRamSize|0|UINT32|0x0000001d
+  gLoongArchQemuPkgTokenSpaceGuid.PcdUefiRamTop|0x0|UINT64|0x0000001e
+  gLoongArchQemuPkgTokenSpaceGuid.PcdRamRegionsBottom|0x0|UINT64|0x00000022
   gLoongArchQemuPkgTokenSpaceGuid.PcdFlashSecFvBase|0x0|UINT64|0x00000028
   gLoongArchQemuPkgTokenSpaceGuid.PcdFlashSecFvSize|0x0|UINT32|0x00000029
+
+[PcdsFixedAtBuild.LOONGARCH64]
+   gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize|32|UINT8|0x00000010
+   gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize|0|UINT8|0x00000011
+
+[PcdsDynamic]
+  gLoongArchQemuPkgTokenSpaceGuid.PcdRamSize|0x40000000|UINT64|0x00000041
+  gLoongArchQemuPkgTokenSpaceGuid.PcdFwCfgSelectorAddress|0x0|UINT64|0x00000042
+  gLoongArchQemuPkgTokenSpaceGuid.PcdFwCfgDataAddress|0x0|UINT64|0x00000043
+  gLoongArchQemuPkgTokenSpaceGuid.PcdSwapPageDir|0x0|UINT64|0x00000044
+  gLoongArchQemuPkgTokenSpaceGuid.PcdInvalidPgd|0x0|UINT64|0x00000045
+  gLoongArchQemuPkgTokenSpaceGuid.PcdInvalidPud|0x0|UINT64|0x00000046
+  gLoongArchQemuPkgTokenSpaceGuid.PcdInvalidPmd|0x0|UINT64|0x00000047
+  gLoongArchQemuPkgTokenSpaceGuid.PcdInvalidPte|0x0|UINT64|0x00000048
+
diff --git a/Platform/Loongson/LoongArchQemuPkg/Loongson.dsc b/Platform/Loongson/LoongArchQemuPkg/Loongson.dsc
index f23fed77e6..09b324c3f7 100644
--- a/Platform/Loongson/LoongArchQemuPkg/Loongson.dsc
+++ b/Platform/Loongson/LoongArchQemuPkg/Loongson.dsc
@@ -57,22 +57,58 @@
 
 [LibraryClasses.common]
   PcdLib                           | MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+  TimerLib                         | Platform/Loongson/LoongArchQemuPkg/Library/StableTimerLib/TimerLib.inf
   PrintLib                         | MdePkg/Library/BasePrintLib/BasePrintLib.inf
   BaseMemoryLib                    | MdePkg/Library/BaseMemoryLib/BaseMemoryLib.inf
 
 
   BaseLib                          | MdePkg/Library/BaseLib/BaseLib.inf
+  PerformanceLib                   | MdePkg/Library/BasePerformanceLibNull/BasePerformanceLibNull.inf
   PeCoffLib                        | MdePkg/Library/BasePeCoffLib/BasePeCoffLib.inf
+  CacheMaintenanceLib              | MdePkg/Library/BaseCacheMaintenanceLib/BaseCacheMaintenanceLib.inf
+  UefiDecompressLib                | MdePkg/Library/BaseUefiDecompressLib/BaseUefiDecompressLib.inf
   PeCoffGetEntryPointLib           | MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
   IoLib                            | MdePkg/Library/BaseIoLibIntrinsic/BaseIoLibIntrinsic.inf
   SerialPortLib                    | Platform/Loongson/LoongArchQemuPkg/Library/SerialPortLib/SerialPortLib.inf
   DebugPrintErrorLevelLib          | MdePkg/Library/BaseDebugPrintErrorLevelLib/BaseDebugPrintErrorLevelLib.inf
+  FdtLib                           | EmbeddedPkg/Library/FdtLib/FdtLib.inf
   PeCoffExtraActionLib             | MdePkg/Library/BasePeCoffExtraActionLibNull/BasePeCoffExtraActionLibNull.inf
   DebugAgentLib                    | MdeModulePkg/Library/DebugAgentLibNull/DebugAgentLibNull.inf
 
   DebugLib                         | MdePkg/Library/BaseDebugLibSerialPort/BaseDebugLibSerialPort.inf
 
+  PeiServicesLib                   | MdePkg/Library/PeiServicesLib/PeiServicesLib.inf
+[LibraryClasses.common.SEC]
+  ReportStatusCodeLib              | MdeModulePkg/Library/PeiReportStatusCodeLib/PeiReportStatusCodeLib.inf
+  HobLib                           | MdePkg/Library/PeiHobLib/PeiHobLib.inf
+  MemoryAllocationLib              | MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
+
+[LibraryClasses.common.PEI_CORE]
+  HobLib                           | MdePkg/Library/PeiHobLib/PeiHobLib.inf
+  PeiServicesTablePointerLib       | Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
+  MemoryAllocationLib              | MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
+  PeiCoreEntryPoint                | MdePkg/Library/PeiCoreEntryPoint/PeiCoreEntryPoint.inf
+  ReportStatusCodeLib              | MdeModulePkg/Library/PeiReportStatusCodeLib/PeiReportStatusCodeLib.inf
+  OemHookStatusCodeLib             | MdeModulePkg/Library/OemHookStatusCodeLibNull/OemHookStatusCodeLibNull.inf
+  PeCoffGetEntryPointLib           | MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
+  QemuFwCfgLib                     | Platform/Loongson/LoongArchQemuPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf
+  MmuLib                           | Platform/Loongson/LoongArchQemuPkg/Library/MmuLib/MmuBaseLibPei.inf
+
+[LibraryClasses.common.PEIM]
+  HobLib                           | MdePkg/Library/PeiHobLib/PeiHobLib.inf
+  PeiServicesTablePointerLib       | Platform/Loongson/LoongArchQemuPkg/Library/PeiServicesTablePointerLib/PeiServicesTablePointerLib.inf
+  MemoryAllocationLib              | MdePkg/Library/PeiMemoryAllocationLib/PeiMemoryAllocationLib.inf
+  PeimEntryPoint                   | MdePkg/Library/PeimEntryPoint/PeimEntryPoint.inf
+  ReportStatusCodeLib              | MdeModulePkg/Library/PeiReportStatusCodeLib/PeiReportStatusCodeLib.inf
+  OemHookStatusCodeLib             | MdeModulePkg/Library/OemHookStatusCodeLibNull/OemHookStatusCodeLibNull.inf
+  PeCoffGetEntryPointLib           | MdePkg/Library/BasePeCoffGetEntryPointLib/BasePeCoffGetEntryPointLib.inf
+  PeiResourcePublicationLib        | MdePkg/Library/PeiResourcePublicationLib/PeiResourcePublicationLib.inf
+  ExtractGuidedSectionLib          | MdePkg/Library/PeiExtractGuidedSectionLib/PeiExtractGuidedSectionLib.inf
+  PcdLib                           | MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
+  QemuFwCfgS3Lib                   | OvmfPkg/Library/QemuFwCfgS3Lib/PeiQemuFwCfgS3LibFwCfg.inf
+  QemuFwCfgLib                     | Platform/Loongson/LoongArchQemuPkg/Library/QemuFwCfgLib/QemuFwCfgLib.inf
 
+  MmuLib                       | Platform/Loongson/LoongArchQemuPkg/Library/MmuLib/MmuBaseLibPei.inf
 
 
 ################################################################################
@@ -119,11 +155,19 @@
   # ASSERT_BREAKPOINT_ENABLED  0x10
   # ASSERT_DEADLOOP_ENABLED    0x20
 
+#######################################################################################
+  gLoongArchQemuPkgTokenSpaceGuid.PcdRamRegionsBottom                  | 0x90000000
   gEfiMdePkgTokenSpaceGuid.PcdGuidedExtractHandlerTableAddress         | 0x90000000
   gLoongArchQemuPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableSize     | 0x10000
   gLoongArchQemuPkgTokenSpaceGuid.PcdSecPeiTempRamBase                 | 0x90010000
   gLoongArchQemuPkgTokenSpaceGuid.PcdSecPeiTempRamSize                 | 0x10000
-
+  gLoongArchQemuPkgTokenSpaceGuid.PcdDeviceTreeBase                    | 0x1c400000
+  #
+  # minimal memory for uefi bios should be 512M
+  # 0x00000000 - 0x10000000
+  # 0x90000000 - 0xA0000000
+  #
+  gLoongArchQemuPkgTokenSpaceGuid.PcdUefiRamTop                        | 0xA0000000
 
 [Components]
 
@@ -131,3 +175,23 @@
   # SEC Phase modules
   #
   Platform/Loongson/LoongArchQemuPkg/Sec/SecMain.inf
+
+  #
+  # PEI Phase modules
+  #
+  MdeModulePkg/Core/Pei/PeiMain.inf
+  MdeModulePkg/Universal/PCD/Pei/Pcd.inf  {
+    <LibraryClasses>
+      PcdLib|MdePkg/Library/BasePcdLibNull/BasePcdLibNull.inf
+  }
+  MdePkg/Library/PeiExtractGuidedSectionLib/PeiExtractGuidedSectionLib.inf
+  MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf {
+    <LibraryClasses>
+      NULL|MdeModulePkg/Library/LzmaCustomDecompressLib/LzmaCustomDecompressLib.inf
+  }
+
+  Platform/Loongson/LoongArchQemuPkg/PlatformPei/PlatformPei.inf {
+    <LibraryClasses>
+      PcdLib|MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
+  }
+
diff --git a/Platform/Loongson/LoongArchQemuPkg/Loongson.fdf b/Platform/Loongson/LoongArchQemuPkg/Loongson.fdf
index 128b3843db..f964304fdc 100644
--- a/Platform/Loongson/LoongArchQemuPkg/Loongson.fdf
+++ b/Platform/Loongson/LoongArchQemuPkg/Loongson.fdf
@@ -45,9 +45,60 @@ READ_LOCK_STATUS   = TRUE
 
 INF  Platform/Loongson/LoongArchQemuPkg/Sec/SecMain.inf
 
+#####################################################################################################
+[FV.PEIFV]
+FvNameGuid         = 6f856a84-de7d-4af9-93a3-342b4ecb46eb
+BlockSize          = $(BLOCK_SIZE)
+FvAlignment        = 16
+ERASE_POLARITY     = 1
+MEMORY_MAPPED      = TRUE
+STICKY_WRITE       = TRUE
+LOCK_CAP           = TRUE
+LOCK_STATUS        = TRUE
+READ_DISABLED_CAP  = TRUE
+READ_ENABLED_CAP   = TRUE
+READ_STATUS        = TRUE
+READ_LOCK_CAP      = TRUE
+READ_LOCK_STATUS   = TRUE
+WRITE_DISABLED_CAP = TRUE
+WRITE_ENABLED_CAP  = TRUE
+WRITE_STATUS       = TRUE
+WRITE_LOCK_CAP     = TRUE
+WRITE_LOCK_STATUS  = TRUE
+
+APRIORI PEI {
+  INF  MdeModulePkg/Universal/PCD/Pei/Pcd.inf
+}
+
+#
+#  PEI Phase modules
+#
+
+INF  MdeModulePkg/Core/Pei/PeiMain.inf
+INF  MdeModulePkg/Universal/PCD/Pei/Pcd.inf
+INF  MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf
+INF  Platform/Loongson/LoongArchQemuPkg/PlatformPei/PlatformPei.inf
+
 #####################################################################################################
 [Rule.Common.SEC]
   FILE SEC = $(NAMED_GUID) {
     TE       TE Align = Auto   $(INF_OUTPUT)/$(MODULE_NAME).efi
     UI       STRING ="$(MODULE_NAME)" Optional
   }
+
+#####################################################################################################
+[Rule.Common.PEI_CORE]
+  FILE PEI_CORE = $(NAMED_GUID) {
+    TE       TE   Align=Auto    $(INF_OUTPUT)/$(MODULE_NAME).efi
+    UI       STRING ="$(MODULE_NAME)" Optional
+  }
+
+#####################################################################################################
+[Rule.Common.PEIM]
+  FILE PEIM = $(NAMED_GUID) {
+     PEI_DEPEX PEI_DEPEX Optional        $(INF_OUTPUT)/$(MODULE_NAME).depex
+     PE32      PE32   Align=Auto         $(INF_OUTPUT)/$(MODULE_NAME).efi
+     UI        STRING="$(MODULE_NAME)" Optional
+  }
+
+#####################################################################################################
diff --git a/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Fv.c b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Fv.c
new file mode 100644
index 0000000000..f79d4506b1
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Fv.c
@@ -0,0 +1,61 @@
+/** @file
+  Build FV related hobs for platform.
+
+  Copyright (c) 2021 Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+#include "PiPei.h"
+#include "Platform.h"
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/PcdLib.h>
+
+
+/**
+  Publish PEI & DXE (Decompressed) Memory based FVs to let PEI
+  and DXE know about them.
+
+  @retval EFI_SUCCESS   Platform PEI FVs were initialized successfully.
+
+**/
+EFI_STATUS
+PeiFvInitialization (
+  VOID
+  )
+{
+  DEBUG ((DEBUG_INFO, "Platform PEI Firmware Volume Initialization\n"));
+
+  //
+  // Create a memory allocation HOB for the PEI FV.
+  //
+  BuildMemoryAllocationHob (
+    PcdGet64 (PcdSecPeiTempRamBase),
+    PcdGet32 (PcdSecPeiTempRamSize),
+    EfiBootServicesData
+    );
+
+  //
+  // Let DXE know about the DXE FV
+  //
+  BuildFvHob (PcdGet64 (PcdFlashDxeFvBase), PcdGet32 (PcdFlashDxeFvSize));
+
+  //
+  // Let PEI know about the DXE FV so it can find the DXE Core
+  //
+  DEBUG ((DEBUG_INFO, "DXEFV base:%p size:%x\n", (VOID *) (UINTN)PcdGet64 (PcdFlashDxeFvBase),
+    PcdGet32 (PcdFlashDxeFvSize)));
+  PeiServicesInstallFvInfoPpi (
+    NULL,
+    (VOID *) (UINTN)PcdGet64 (PcdFlashDxeFvBase),
+    PcdGet32 (PcdFlashDxeFvSize),
+    NULL,
+    NULL
+    );
+
+  return EFI_SUCCESS;
+}
diff --git a/Platform/Loongson/LoongArchQemuPkg/PlatformPei/MemDetect.c b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/MemDetect.c
new file mode 100644
index 0000000000..c40d7d5c71
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/MemDetect.c
@@ -0,0 +1,116 @@
+/** @file
+  Memory Detection for Virtual Machines.
+
+  Copyright (c) 2021 Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+//
+// The package level header files this module uses
+//
+#include <PiPei.h>
+
+//
+// The Library classes this module consumes
+//
+#include <Library/BaseMemoryLib.h>
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/IoLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PeimEntryPoint.h>
+#include <Library/ResourcePublicationLib.h>
+
+#include "Platform.h"
+
+/**
+  Publish PEI core memory
+
+  @return EFI_SUCCESS     The PEIM initialized successfully.
+
+**/
+EFI_STATUS
+PublishPeiMemory (
+  VOID
+  )
+{
+  EFI_STATUS  Status;
+  UINT64 Base;
+  UINT64      Size;
+  UINT64      RamTop;
+
+  //
+  // Determine the range of memory to use during PEI
+  //
+  Base = PcdGet64 (PcdSecPeiTempRamBase) + PcdGet32 (PcdSecPeiTempRamSize);
+  RamTop = PcdGet64 (PcdUefiRamTop);
+  Size = RamTop - Base;
+
+
+  //
+  // Publish this memory to the PEI Core
+  //
+  Status = PublishSystemMemory (Base, Size);
+  ASSERT_EFI_ERROR (Status);
+
+  DEBUG ((DEBUG_INFO, "Publish Memory Initialize done.\n"));
+  return Status;
+}
+
+/**
+  Peform Memory Detection
+  Publish system RAM and reserve memory regions
+**/
+VOID
+InitializeRamRegions (
+  VOID
+  )
+{
+  UINT64 Base;
+  UINT64 End;
+
+
+  //
+  // DDR memory space address range
+  // 0x00000000 - 0x10000000  lower 256M memory space
+  // 0x90000000 - BASE_4GB    if there is
+  // BASE_4GB   -
+  Base = PcdGet64 (PcdRamRegionsBottom);
+  End  = Base + PcdGet64 (PcdRamSize) - 0x10000000;
+
+  //
+  // Create memory HOBs.
+  // Put memory below 4G address space at the first memory HOB
+  //
+  DEBUG ((DEBUG_INFO, "%a: MemoryBase=%llx, MemoryEnd=%llx\n", __FUNCTION__, Base, End));
+
+  if (End > BASE_4GB) {
+    AddMemoryRangeHob (Base, BASE_4GB);
+    AddMemoryRangeHob (BASE_4GB, End);
+  } else {
+
+    AddMemoryRangeHob (Base, End);
+  }
+  AddMemoryRangeHob (0x0, 0x10000000);
+
+  //
+  // Lock the scope of the cache.
+  //
+  BuildMemoryAllocationHob (
+    PcdGet64 (PcdSecPeiTempRamBase),
+    PcdGet32 (PcdSecPeiTempRamSize),
+    EfiACPIMemoryNVS
+    );
+
+  //
+  // SEC stores its table of GUIDed section handlers here.
+  //
+  BuildMemoryAllocationHob (
+    PcdGet64 (PcdGuidedExtractHandlerTableAddress),
+    PcdGet32 (PcdGuidedExtractHandlerTableSize),
+    EfiACPIMemoryNVS
+    );
+}
diff --git a/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.c b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.c
new file mode 100644
index 0000000000..6f6c53fcab
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.c
@@ -0,0 +1,264 @@
+/** @file
+  Platform PEI driver
+
+  Copyright (c) 2021 Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  @par Glossary:
+    - Mem - Memory
+**/
+
+
+//
+// The package level header files this module uses
+//
+#include <PiPei.h>
+//
+// The Library classes this module consumes
+//
+#include <Library/DebugLib.h>
+#include <Library/HobLib.h>
+#include <Library/IoLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/PcdLib.h>
+#include <Library/PeimEntryPoint.h>
+#include <Library/PeiServicesLib.h>
+#include <Library/ResourcePublicationLib.h>
+#include <Guid/MemoryTypeInformation.h>
+#include <Library/QemuFwCfgLib.h>
+#include <Library/MmuLib.h>
+#include <Guid/FdtHob.h>
+#include <libfdt.h>
+#include <Ppi/MasterBootMode.h>
+
+#include "Platform.h"
+
+/* TODO */
+EFI_MEMORY_TYPE_INFORMATION mDefaultMemoryTypeInformation[] = {
+  { EfiReservedMemoryType,  0x004 },
+  { EfiRuntimeServicesData, 0x024 },
+  { EfiRuntimeServicesCode, 0x030 },
+  { EfiBootServicesCode,    0x180 },
+  { EfiBootServicesData,    0xF00 },
+  { EfiMaxMemoryType,       0x000 }
+};
+
+//
+// Module globals
+//
+CONST EFI_PEI_PPI_DESCRIPTOR  mPpiListBootMode = {
+  (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+  &gEfiPeiMasterBootModePpiGuid,
+  NULL
+};
+
+/**
+  Create Reserved type memory range hand off block.
+
+  @param  MemoryBase    memory base address.
+  @param  MemoryLimit  memory length.
+
+  @return  VOID
+**/
+VOID
+AddReservedMemoryBaseSizeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  UINT64                      MemorySize
+  )
+{
+  BuildResourceDescriptorHob (
+    EFI_RESOURCE_MEMORY_RESERVED,
+    EFI_RESOURCE_ATTRIBUTE_PRESENT     |
+    EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+    EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+    EFI_RESOURCE_ATTRIBUTE_TESTED,
+    MemoryBase,
+    MemorySize
+    );
+}
+/**
+  Create system type  memory range hand off block.
+
+  @param  MemoryBase    memory base address.
+  @param  MemoryLimit  memory length.
+
+  @return  VOID
+**/
+VOID
+AddMemoryBaseSizeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  UINT64                      MemorySize
+  )
+{
+  BuildResourceDescriptorHob (
+    EFI_RESOURCE_SYSTEM_MEMORY,
+    EFI_RESOURCE_ATTRIBUTE_PRESENT |
+    EFI_RESOURCE_ATTRIBUTE_INITIALIZED |
+    EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |
+    EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |
+    EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
+    EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE |
+    EFI_RESOURCE_ATTRIBUTE_TESTED,
+    MemoryBase,
+    MemorySize
+    );
+}
+
+/**
+  Create  memory range hand off block.
+
+  @param  MemoryBase    memory base address.
+  @param  MemoryLimit  memory length.
+
+  @return  VOID
+**/
+VOID
+AddMemoryRangeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  EFI_PHYSICAL_ADDRESS        MemoryLimit
+  )
+{
+  AddMemoryBaseSizeHob (MemoryBase, (UINT64) (MemoryLimit - MemoryBase));
+}
+/**
+  Create  memory type information hand off block.
+
+  @param  VOID
+
+  @return  VOID
+**/
+VOID
+MemMapInitialization (
+  VOID
+  )
+{
+  DEBUG ((DEBUG_INFO, "==%a==\n", __func__));
+  //
+  // Create Memory Type Information HOB
+  //
+  BuildGuidDataHob (
+    &gEfiMemoryTypeInformationGuid,
+    mDefaultMemoryTypeInformation,
+    sizeof (mDefaultMemoryTypeInformation)
+    );
+}
+
+/**
+  Misc Initialization.
+
+  @param  VOID
+
+  @return  VOID
+**/
+VOID
+MiscInitialization (
+  VOID
+  )
+{
+  DEBUG ((DEBUG_INFO, "==%a==\n", __func__));
+  //
+  // Creat CPU HOBs.
+  //
+  BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));
+}
+/**
+  add fdt hand off block.
+
+  @param  VOID
+
+  @return  VOID
+**/
+VOID
+AddFdtHob (VOID)
+{
+  VOID    *Base;
+  VOID    *NewBase;
+  UINTN   FdtSize;
+  UINTN   FdtPages;
+  UINT64  *FdtHobData;
+
+  Base = (VOID*)(UINTN)PcdGet64 (PcdDeviceTreeBase);
+  ASSERT (Base != NULL);
+
+  FdtSize = fdt_totalsize (Base) + PcdGet32 (PcdDeviceTreePadding);
+  FdtPages = EFI_SIZE_TO_PAGES (FdtSize);
+  NewBase = AllocatePages (FdtPages);
+  ASSERT (NewBase != NULL);
+  fdt_open_into (Base, NewBase, EFI_PAGES_TO_SIZE (FdtPages));
+
+  FdtHobData = BuildGuidHob (&gFdtHobGuid, sizeof *FdtHobData);
+  ASSERT (FdtHobData != NULL);
+  *FdtHobData = (UINTN)NewBase;
+
+}
+
+/**
+  Fetch the size of system memory from QEMU.
+
+  @param  VOID
+
+  @return  VOID
+**/
+VOID
+SystemMemorySizeInitialization (
+  VOID
+  )
+{
+  UINT64        RamSize;
+  RETURN_STATUS PcdStatus;
+
+  QemuFwCfgSelectItem (QemuFwCfgItemRamSize);
+  RamSize= QemuFwCfgRead64 ();
+  DEBUG ((DEBUG_INFO, "%a: QEMU reports %dM system memory\n", __FUNCTION__,
+    RamSize/1024/1024));
+
+  //
+  // If the fw_cfg key or fw_cfg entirely is unavailable, no change to PCD.
+  //
+  if (RamSize == 0) {
+    return;
+  }
+
+  //
+  // Otherwise, set RamSize to PCD.
+  //
+  PcdStatus =  PcdSet64S (PcdRamSize, RamSize);
+  ASSERT_RETURN_ERROR (PcdStatus);
+}
+
+/**
+  Perform Platform PEI initialization.
+
+  @param  FileHandle      Handle of the file being invoked.
+  @param  PeiServices     Describes the list of possible PEI Services.
+
+  @return EFI_SUCCESS     The PEIM initialized successfully.
+
+**/
+EFI_STATUS
+EFIAPI
+InitializePlatform (
+  IN       EFI_PEI_FILE_HANDLE  FileHandle,
+  IN CONST EFI_PEI_SERVICES     **PeiServices
+  )
+{
+  EFI_STATUS Status;
+
+  DEBUG ((DEBUG_INFO, "Platform PEIM Loaded\n"));
+
+  Status = PeiServicesInstallPpi (&mPpiListBootMode);
+  ASSERT_EFI_ERROR (Status);
+
+  SystemMemorySizeInitialization ();
+  PublishPeiMemory ();
+  PeiFvInitialization ();
+  InitializeRamRegions ();
+  MemMapInitialization ();
+  MiscInitialization ();
+  AddFdtHob ();
+  ConfigureMmu ();
+
+  return EFI_SUCCESS;
+}
diff --git a/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.h b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.h
new file mode 100644
index 0000000000..bc44f233e7
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/Platform.h
@@ -0,0 +1,87 @@
+/** @file
+  Platform PEI module include file.
+
+  Copyright (c) 2021 Loongson Technology Corporation Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef PLATFORM_H_
+#define PLATFORM_H_
+
+#include <IndustryStandard/Pci22.h>
+
+/**
+  Create system type  memory range hand off block.
+
+  @param  MemoryBase    memory base address.
+  @param  MemoryLimit  memory length.
+
+  @return  VOID
+**/
+VOID
+AddMemoryBaseSizeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  UINT64                      MemorySize
+  );
+
+/**
+  Create  memory range hand off block.
+
+  @param  MemoryBase    memory base address.
+  @param  MemoryLimit  memory length.
+
+  @return  VOID
+**/
+VOID
+AddMemoryRangeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  EFI_PHYSICAL_ADDRESS        MemoryLimit
+  );
+
+/**
+  Create Reserved type memory range hand off block.
+
+  @param  MemoryBase    memory base address.
+  @param  MemoryLimit  memory length.
+
+  @return  VOID
+**/
+VOID
+AddReservedMemoryBaseSizeHob (
+  EFI_PHYSICAL_ADDRESS        MemoryBase,
+  UINT64                      MemorySize
+  );
+/**
+  Publish PEI core memory
+
+  @return EFI_SUCCESS     The PEIM initialized successfully.
+
+**/
+EFI_STATUS
+PublishPeiMemory (
+  VOID
+  );
+/**
+  Publish system RAM and reserve memory regions
+
+**/
+VOID
+InitializeRamRegions (
+  VOID
+  );
+
+/**
+  Publish PEI & DXE (Decompressed) Memory based FVs to let PEI
+  and DXE know about them.
+
+  @retval EFI_SUCCESS   Platform PEI FVs were initialized successfully.
+
+**/
+EFI_STATUS
+PeiFvInitialization (
+  VOID
+  );
+
+#endif // _PLATFORM_PEI_H_INCLUDED_
diff --git a/Platform/Loongson/LoongArchQemuPkg/PlatformPei/PlatformPei.inf b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/PlatformPei.inf
new file mode 100644
index 0000000000..e8d3ed0008
--- /dev/null
+++ b/Platform/Loongson/LoongArchQemuPkg/PlatformPei/PlatformPei.inf
@@ -0,0 +1,72 @@
+
+## @file
+#  Platform PEI driver
+#
+#  Copyright (c) 2021 Loongson Technology Corporation Limited. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = PlatformPei
+  FILE_GUID                      = 4c0e81e5-e8e3-4eef-b24b-19b686e9ab53
+  MODULE_TYPE                    = PEIM
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = InitializePlatform
+
+[Sources]
+  Fv.c
+  MemDetect.c
+  Platform.c
+
+
+[Packages]
+  ArmVirtPkg/ArmVirtPkg.dec
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
+  Platform/Loongson/LoongArchQemuPkg/Loongson.dec
+  OvmfPkg/OvmfPkg.dec
+
+[Ppis]
+  gEfiPeiMasterBootModePpiGuid
+
+[Guids]
+  gEfiMemoryTypeInformationGuid
+  gFdtHobGuid
+
+[LibraryClasses]
+  DebugLib
+  BaseMemoryLib
+  HobLib
+  IoLib
+  PeiResourcePublicationLib
+  PeiServicesLib
+  PeiServicesTablePointerLib
+  PeimEntryPoint
+  QemuFwCfgLib
+  PcdLib
+  TimerLib
+  MmuLib
+
+[Pcd]
+  gLoongArchQemuPkgTokenSpaceGuid.PcdRamSize
+  gLoongArchQemuPkgTokenSpaceGuid.PcdDeviceTreeBase
+  gLoongArchQemuPkgTokenSpaceGuid.PcdDeviceTreePadding
+
+[FixedPcd]
+  gLoongArchQemuPkgTokenSpaceGuid.PcdFlashDxeFvBase
+  gLoongArchQemuPkgTokenSpaceGuid.PcdFlashDxeFvSize
+  gLoongArchQemuPkgTokenSpaceGuid.PcdRamRegionsBottom
+  gLoongArchQemuPkgTokenSpaceGuid.PcdUefiRamTop
+  gLoongArchQemuPkgTokenSpaceGuid.PcdSecPeiTempRamBase
+  gLoongArchQemuPkgTokenSpaceGuid.PcdSecPeiTempRamSize
+  gLoongArchQemuPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableSize
+  gEfiMdePkgTokenSpaceGuid.PcdGuidedExtractHandlerTableAddress
+  gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize
+  gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize
+
+[Depex]
+  TRUE
-- 
2.27.0