-/*++\r
+/** @file\r
+Module produce EFI_PEI_READ_ONLY_VARIABLE2_PPI on top of EFI_PEI_READ_ONLY_VARIABLE_PPI.\r
+UEFI PI Spec supersedes Intel's Framework Specs. \r
+EFI_PEI_READ_ONLY_VARIABLE_PPI defined in Intel Framework Pkg is replaced by EFI_PEI_READ_ONLY_VARIABLE2_PPI\r
+in MdePkg.\r
+This module produces EFI_PEI_READ_ONLY_VARIABLE2_PPI on top of EFI_PEI_READ_ONLY_VARIABLE_PPI. \r
+This module is used on platform when both of these two conditions are true:\r
+1) Framework module produces EFI_PEI_READ_ONLY_VARIABLE_PPI is present.\r
+2) The platform has PI modules that only consumes EFI_PEI_READ_ONLY_VARIABLE2_PPI.\r
+\r
+This module can't be used together with ReadOnlyVariableToReadOnlyVariable2Thunk module.\r
+\r
\r
Copyright (c) 2006 - 2008 Intel Corporation. <BR>\r
All rights reserved. This program and the accompanying materials\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
Module Name:\r
\r
- Variable.c\r
-\r
-Abstract:\r
-\r
- PEIM to provide the Variable functionality\r
-\r
---*/\r
+**/\r
\r
#include <PiPei.h>\r
#include <Ppi/ReadOnlyVariable2.h>\r
#include <Ppi/ReadOnlyVariable.h>\r
+#include <Ppi/ReadOnlyVariableThunkPresent.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PeiServicesTablePointerLib.h>\r
#include <Library/PeiServicesLib.h>\r
&mVariablePpi\r
};\r
\r
+\r
+EFI_PEI_PPI_DESCRIPTOR mReadOnlyVariableThunkPresent = {\r
+ (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
+ &gPeiReadonlyVariableThunkPresentPpiGuid,\r
+ NULL\r
+};\r
+\r
EFI_STATUS\r
EFIAPI\r
PeimInitializeReadOnlyVariable2 (\r
\r
--*/\r
{\r
+ VOID *Interface;\r
+ EFI_STATUS Status;\r
+ //\r
+ // This thunk module can only be used together with a PI PEI core, as we \r
+ // assume PeiServices Pointer Table can be located in a standard way defined\r
+ // in PI spec.\r
+ //\r
+ ASSERT ((*PeiServices)->Hdr.Revision >= 0x00010000);\r
+\r
+ //\r
+ // Make sure ReadOnlyVariable2ToReadOnlyVariable module is not present. If so, the call chain will form a\r
+ // infinite loop: ReadOnlyVariable2 -> ReadOnlyVariable -> ReadOnlyVariable2 -> ....\r
+ //\r
+ Status = PeiServicesLocatePpi (&gPeiReadonlyVariableThunkPresentPpiGuid, 0, NULL, &Interface);\r
+ ASSERT (Status == EFI_NOT_FOUND);\r
+ \r
+ Status = PeiServicesInstallPpi (&mReadOnlyVariableThunkPresent);\r
+ ASSERT_EFI_ERROR (Status);\r
+ \r
//\r
// Publish the variable capability to other modules\r
//\r
return PeiServicesInstallPpi (&mPpiListVariable);\r
}\r
\r
+/**\r
+ Provide the read variable functionality of the variable services.\r
+\r
+ @param PeiServices General purpose services available to every PEIM.\r
+ @param VariableName The variable name\r
+ @param VendorGuid The vendor's GUID\r
+ @param Attributes Pointer to the attribute\r
+ @param DataSize Size of data\r
+ @param Data Pointer to data\r
+\r
+ @retval EFI_SUCCESS The interface could be successfully installed\r
+ @retval EFI_NOT_FOUND The variable could not be discovered\r
+ @retval EFI_BUFFER_TOO_SMALL The caller buffer is not large enough\r
+\r
+**/\r
EFI_STATUS\r
EFIAPI\r
PeiGetVariable (\r
IN OUT UINTN *DataSize,\r
OUT VOID *Data\r
)\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Provide the read variable functionality of the variable services.\r
-\r
-Arguments:\r
-\r
- PeiServices - General purpose services available to every PEIM.\r
-\r
- VariableName - The variable name\r
-\r
- VendorGuid - The vendor's GUID\r
-\r
- Attributes - Pointer to the attribute\r
-\r
- DataSize - Size of data\r
-\r
- Data - Pointer to data\r
-\r
-Returns:\r
-\r
- EFI_SUCCESS - The interface could be successfully installed\r
-\r
- EFI_NOT_FOUND - The variable could not be discovered\r
-\r
- EFI_BUFFER_TOO_SMALL - The caller buffer is not large enough\r
-\r
---*/\r
{\r
EFI_STATUS Status;\r
EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;\r
);\r
}\r
\r
+/**\r
+ Provide the get next variable functionality of the variable services.\r
+\r
+ @param PeiServices General purpose services available to every PEIM.\r
+ @param VariabvleNameSize The variable name's size.\r
+ @param VariableName A pointer to the variable's name.\r
+ @param VariableGuid A pointer to the EFI_GUID structure.\r
+ @param VariableNameSize Size of the variable name\r
+ @param VariableName The variable name\r
+ @param VendorGuid The vendor's GUID\r
+\r
+ @retval EFI_SUCCESS The interface could be successfully installed\r
+ @retval EFI_NOT_FOUND The variable could not be discovered\r
+\r
+**/\r
EFI_STATUS\r
EFIAPI\r
PeiGetNextVariableName (\r
IN OUT CHAR16 *VariableName,\r
IN OUT EFI_GUID *VariableGuid\r
)\r
-/*++\r
-\r
-Routine Description:\r
-\r
- Provide the get next variable functionality of the variable services.\r
-\r
-Arguments:\r
-\r
- PeiServices - General purpose services available to every PEIM.\r
- VariabvleNameSize - The variable name's size.\r
- VariableName - A pointer to the variable's name.\r
- VariableGuid - A pointer to the EFI_GUID structure.\r
-\r
- VariableNameSize - Size of the variable name\r
-\r
- VariableName - The variable name\r
-\r
- VendorGuid - The vendor's GUID\r
-\r
-Returns:\r
-\r
- EFI_SUCCESS - The interface could be successfully installed\r
-\r
- EFI_NOT_FOUND - The variable could not be discovered\r
-\r
---*/\r
{\r
EFI_STATUS Status;\r
EFI_PEI_READ_ONLY_VARIABLE_PPI *ReadOnlyVariable;\r
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