[PATCH v2 06/17] MdeModulePkg/FaultTolerantWriteDxe: implement standalone MM version

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

Implement a new version of the fault tolerant write driver that can
be used in the context of a standalone MM implementation.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
---
 MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.inf | 90 ++++++++++++++++++++
 MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c   | 88 +++++++++++++++++++
 2 files changed, 178 insertions(+)

diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.inf b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.inf
new file mode 100644
index 000000000000..c667d4c19bfa
--- /dev/null
+++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.inf
@@ -0,0 +1,90 @@
+ ## @file
+#   Fault Tolerant Write Smm Driver.
+#
+#   This driver installs SMM Fault Tolerant Write (FTW) protocol, which provides fault
+#   tolerant write capability in SMM environment for block devices. Its implementation
+#   depends on the full functionality SMM FVB protocol that support read, write/erase
+#   flash access.
+#
+# Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
+#
+#  This program and the accompanying materials
+#  are licensed and made available under the terms and conditions of the BSD License
+#  which accompanies this distribution. The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x0001001B
+  BASE_NAME                      = FaultTolerantWriteStandaloneMm
+  FILE_GUID                      = 3aade4ec-63cc-4a48-a928-5a374dd463eb
+  MODULE_TYPE                    = MM_STANDALONE
+  VERSION_STRING                 = 1.0
+  PI_SPECIFICATION_VERSION       = 0x00010032
+  ENTRY_POINT                    = StandaloneMmFaultTolerantWriteInitialize
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 ARM AARCH64
+#
+
+[Sources]
+  FtwMisc.c
+  UpdateWorkingBlock.c
+  FaultTolerantWrite.c
+  FaultTolerantWriteStandaloneMm.c
+  FaultTolerantWriteSmm.c
+  FaultTolerantWrite.h
+  FaultTolerantWriteSmmCommon.h
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  StandaloneMmPkg/StandaloneMmPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  MemoryAllocationLib
+  MmServicesTableLib
+  PcdLib
+  ReportStatusCodeLib
+  StandaloneMmDriverEntryPoint
+
+[Guids]
+  #
+  # Signature in EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER
+  #
+  ## CONSUMES           ## GUID
+  ## PRODUCES           ## GUID
+  gEdkiiWorkingBlockSignatureGuid
+
+[Protocols]
+  gEfiSmmSwapAddressRangeProtocolGuid | gEfiMdeModulePkgTokenSpaceGuid.PcdFullFtwServiceEnable  ## SOMETIMES_CONSUMES
+  ## NOTIFY
+  ## CONSUMES
+  gEfiSmmFirmwareVolumeBlockProtocolGuid
+  ## PRODUCES
+  ## UNDEFINED # SmiHandlerRegister
+  gEfiSmmFaultTolerantWriteProtocolGuid
+  gEfiMmEndOfDxeProtocolGuid                       ## CONSUMES
+
+[FeaturePcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFullFtwServiceEnable    ## CONSUMES
+
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase    ## SOMETIMES_CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingBase64  ## CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwWorkingSize    ## CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase      ## SOMETIMES_CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareBase64    ## CONSUMES
+  gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageFtwSpareSize      ## CONSUMES
+
+[Depex]
+  TRUE
diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c
new file mode 100644
index 000000000000..95effd6d75fa
--- /dev/null
+++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c
@@ -0,0 +1,88 @@
+/** @file
+
+  Parts of the SMM/MM implementation that are specific to standalone MM
+
+Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
+This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Library/SmmMemLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include "FaultTolerantWrite.h"
+#include "FaultTolerantWriteSmmCommon.h"
+
+/**
+  This function checks if the buffer is valid per processor architecture and
+  does not overlap with SMRAM.
+
+  @param Buffer The buffer start address to be checked.
+  @param Length The buffer length to be checked.
+
+  @retval TRUE  This buffer is valid per processor architecture and does not
+                overlap with SMRAM.
+  @retval FALSE This buffer is not valid per processor architecture or overlaps
+                with SMRAM.
+**/
+BOOLEAN
+FtwSmmIsBufferOutsideSmmValid (
+  IN EFI_PHYSICAL_ADDRESS  Buffer,
+  IN UINT64                Length
+  )
+{
+  return TRUE;
+}
+
+/**
+  Internal implementation of CRC32. Depending on the execution context
+  (standalone SMM or DXE vs standalone MM), this function is implemented
+  via a call to the CalculateCrc32 () boot service, or via a library
+  call.
+
+  If Buffer is NULL, then ASSERT().
+  If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
+
+  @param[in]  Buffer       A pointer to the buffer on which the 32-bit CRC is to be computed.
+  @param[in]  Length       The number of bytes in the buffer Data.
+
+  @retval Crc32            The 32-bit CRC was computed for the data buffer.
+
+**/
+UINT32
+FtwCalculateCrc32 (
+  IN  VOID                         *Buffer,
+  IN  UINTN                        Length
+  )
+{
+  return CalculateCrc32 (Buffer, Length);
+}
+
+/**
+  Notify the system that the SMM FTW driver is ready
+**/
+VOID
+FtwNotifySmmReady (
+  VOID
+  )
+{
+}
+
+/**
+  Entry point of the module
+**/
+EFI_STATUS
+EFIAPI
+StandaloneMmFaultTolerantWriteInitialize (
+  IN EFI_HANDLE            ImageHandle,
+  IN EFI_MM_SYSTEM_TABLE   *MmSystemTable
+  )
+{
+  return MmFaultTolerantWriteInitialize ();
+}
-- 
2.20.1