+/** @file\r
+\r
+ Parts of the SMM/MM implementation that are specific to traditional MM\r
+\r
+Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved. <BR>\r
+Copyright (c) 2018, Linaro, Ltd. All rights reserved. <BR>\r
+This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
+\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+**/\r
+\r
+#include <Library/SmmMemLib.h>\r
+#include <Library/UefiBootServicesTableLib.h>\r
+#include "FaultTolerantWrite.h"\r
+#include "FaultTolerantWriteSmmCommon.h"\r
+\r
+/**\r
+ This function checks if the buffer is valid per processor architecture and\r
+ does not overlap with SMRAM.\r
+\r
+ @param Buffer The buffer start address to be checked.\r
+ @param Length The buffer length to be checked.\r
+\r
+ @retval TRUE This buffer is valid per processor architecture and does not\r
+ overlap with SMRAM.\r
+ @retval FALSE This buffer is not valid per processor architecture or overlaps\r
+ with SMRAM.\r
+**/\r
+BOOLEAN\r
+FtwSmmIsBufferOutsideSmmValid (\r
+ IN EFI_PHYSICAL_ADDRESS Buffer,\r
+ IN UINT64 Length\r
+ )\r
+{\r
+ return SmmIsBufferOutsideSmmValid (Buffer, Length);\r
+}\r
+\r
+/**\r
+ Internal implementation of CRC32. Depending on the execution context\r
+ (traditional SMM or DXE vs standalone MM), this function is implemented\r
+ via a call to the CalculateCrc32 () boot service, or via a library\r
+ call.\r
+\r
+ If Buffer is NULL, then ASSERT().\r
+ If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r
+\r
+ @param[in] Buffer A pointer to the buffer on which the 32-bit CRC is\r
+ to be computed.\r
+ @param[in] Length The number of bytes in the buffer Data.\r
+\r
+ @retval Crc32 The 32-bit CRC was computed for the data buffer.\r
+\r
+**/\r
+UINT32\r
+FtwCalculateCrc32 (\r
+ IN VOID *Buffer,\r
+ IN UINTN Length\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINT32 ReturnValue;\r
+\r
+ Status = gBS->CalculateCrc32 (Buffer, Length, &ReturnValue);\r
+ ASSERT_EFI_ERROR (Status);\r
+\r
+ return ReturnValue;\r
+}\r
+\r
+/**\r
+ Notify the system that the SMM FTW driver is ready\r
+**/\r
+VOID\r
+FtwNotifySmmReady (\r
+ VOID\r
+ )\r
+{\r
+ EFI_HANDLE FtwHandle;\r
+ EFI_STATUS Status;\r
+\r
+ FtwHandle = NULL;\r
+ Status = gBS->InstallProtocolInterface (\r
+ &FtwHandle,\r
+ &gEfiSmmFaultTolerantWriteProtocolGuid,\r
+ EFI_NATIVE_INTERFACE,\r
+ NULL\r
+ );\r
+ ASSERT_EFI_ERROR (Status);\r
+}\r
+\r
+/**\r
+ This function is the entry point of the Fault Tolerant Write driver.\r
+\r
+ @param[in] ImageHandle A handle for the image that is initializing this driver\r
+ @param[in] SystemTable A pointer to the EFI system table\r
+\r
+ @retval EFI_SUCCESS The initialization finished successfully.\r
+ @retval EFI_OUT_OF_RESOURCES Allocate memory error\r
+ @retval EFI_INVALID_PARAMETER Workspace or Spare block does not exist\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+SmmFaultTolerantWriteInitialize (\r
+ IN EFI_HANDLE ImageHandle,\r
+ IN EFI_SYSTEM_TABLE *SystemTable\r
+ )\r
+{\r
+ return MmFaultTolerantWriteInitialize ();\r
+}\r
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