MdeModulePkg/FaultTolerantWriteDxe: implement standalone MM version

[mirror_edk2.git] / MdeModulePkg / Universal / FaultTolerantWriteDxe / FaultTolerantWriteStandaloneMm.c

diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c
new file mode 100644 (file)
index 0000000..8a4ea5b
--- /dev/null
+++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteStandaloneMm.c
@@ -0,0 +1,96 @@
+/** @file\r
+\r
+  Parts of the SMM/MM implementation that are specific to standalone MM\r
+\r
+Copyright (c) 2010 - 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 TRUE;\r
+}\r
+\r
+/**\r
+  Internal implementation of CRC32. Depending on the execution context\r
+  (standalone 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 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
+  return CalculateCrc32 (Buffer, Length);\r
+}\r
+\r
+/**\r
+  Notify the system that the SMM FTW driver is ready\r
+**/\r
+VOID\r
+FtwNotifySmmReady (\r
+  VOID\r
+  )\r
+{\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] MmSystemTable      A pointer to the MM 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
+StandaloneMmFaultTolerantWriteInitialize (\r
+  IN EFI_HANDLE            ImageHandle,\r
+  IN EFI_MM_SYSTEM_TABLE   *MmSystemTable\r
+  )\r
+{\r
+  return MmFaultTolerantWriteInitialize ();\r
+}\r