One minor comment.
With it handled, Reviewed-by: Star Zeng <[email protected]>
On 2019/1/14 21:27, Ard Biesheuvel wrote:
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 <[email protected]>
Reviewed-by: Jian J Wang <[email protected]>
---
MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.inf
| 90 ++++++++++++++++++++
MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c
| 88 +++++++++++++++++++
2 files changed, 178 insertions(+)
[Trimmed]
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
The comments block should have description for the two parameters.
Thanks,
Star
+**/
+EFI_STATUS
+EFIAPI
+StandaloneMmFaultTolerantWriteInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_MM_SYSTEM_TABLE *MmSystemTable
+ )
+{
+ return MmFaultTolerantWriteInitialize ();
+}
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