1)Add a new module CapsuleRuntime under EdkModulePkg\Universal\Capsule\RuntimeDxe...

[mirror_edk2.git] / EdkModulePkg / Universal / EmuVariable / RuntimeDxe / EmuVariable.c

diff --git a/EdkModulePkg/Universal/EmuVariable/RuntimeDxe/EmuVariable.c b/EdkModulePkg/Universal/EmuVariable/RuntimeDxe/EmuVariable.c
index beb404f42cbd7dc03c1ddfd3baba5c3065b033a1..6614bb03e9b1ae4d64e816590f596bdc0b3db1d8 100644 (file)
--- a/EdkModulePkg/Universal/EmuVariable/RuntimeDxe/EmuVariable.c
+++ b/EdkModulePkg/Universal/EmuVariable/RuntimeDxe/EmuVariable.c
@@ -656,6 +656,125 @@ Returns:
   return EFI_SUCCESS;\r
 }\r
 \r
+#if (EFI_SPECIFICATION_VERSION >= 0x00020000)\r
+EFI_STATUS\r
+EFIAPI\r
+QueryVariableInfo (\r
+  IN  UINT32                 Attributes,\r
+  OUT UINT64                 *MaximumVariableStorageSize,\r
+  OUT UINT64                 *RemainingVariableStorageSize,\r
+  OUT UINT64                 *MaximumVariableSize,\r
+  IN  VARIABLE_GLOBAL        *Global,\r
+  IN  UINT32                 Instance\r
+  )\r
+/*++\r
+\r
+Routine Description:\r
+\r
+  This code returns information about the EFI variables.\r
+\r
+Arguments:\r
+\r
+  Attributes                      Attributes bitmask to specify the type of variables \r
+                                  on which to return information.\r
+  MaximumVariableStorageSize      Pointer to the maximum size of the storage space available\r
+                                  for the EFI variables associated with the attributes specified.\r
+  RemainingVariableStorageSize    Pointer to the remaining size of the storage space available \r
+                                  for the EFI variables associated with the attributes specified.\r
+  MaximumVariableSize             Pointer to the maximum size of the individual EFI variables\r
+                                  associated with the attributes specified.\r
+  Global                          Pointer to VARIABLE_GLOBAL structure.\r
+  Instance                        Instance of the Firmware Volume.\r
+\r
+Returns:\r
+\r
+  EFI STATUS\r
+  EFI_INVALID_PARAMETER           - An invalid combination of attribute bits was supplied.\r
+  EFI_SUCCESS                     - Query successfully.\r
+  EFI_UNSUPPORTED                 - The attribute is not supported on this platform.\r
+\r
+--*/\r
+{\r
+  VARIABLE_HEADER        *Variable;\r
+  VARIABLE_HEADER        *NextVariable;\r
+  UINT64                 VariableSize;\r
+  VARIABLE_STORE_HEADER  *VariableStoreHeader;\r
+  \r
+  if(MaximumVariableStorageSize == NULL || RemainingVariableStorageSize == NULL || MaximumVariableSize == NULL) {\r
+    return EFI_INVALID_PARAMETER;\r
+  }\r
+\r
+  if((Attributes & (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS)) == 0) {\r
+    //\r
+    // Make sure the Attributes combination is supported by the platform.\r
+    //\r
+    return EFI_UNSUPPORTED;\r
+  } else if ((Attributes & (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS)) == EFI_VARIABLE_RUNTIME_ACCESS) {\r
+    //\r
+    // Make sure if runtime bit is set, boot service bit is set also.\r
+    //\r
+    return EFI_INVALID_PARAMETER;\r
+  } else if (EfiAtRuntime () && !(Attributes & EFI_VARIABLE_RUNTIME_ACCESS)) {\r
+    //\r
+    //   Make sure RT Attribute is set if we are in Runtime phase.\r
+    //\r
+    return EFI_INVALID_PARAMETER;\r
+  }\r
+\r
+  if((Attributes & EFI_VARIABLE_NON_VOLATILE) == 0) {\r
+    //\r
+    // Query is Volatile related.\r
+    //\r
+    VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->VolatileVariableBase);    \r
+  } else {\r
+    //\r
+    // Query is Non-Volatile related.\r
+    //\r
+    VariableStoreHeader = (VARIABLE_STORE_HEADER *) ((UINTN) Global->NonVolatileVariableBase);\r
+  }\r
+\r
+  //\r
+  // Now let's fill *MaximumVariableStorageSize *RemainingVariableStorageSize \r
+  // with the storage size (excluding the storage header size)\r
+  //\r
+  *MaximumVariableStorageSize   = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r
+  *RemainingVariableStorageSize = VariableStoreHeader->Size - sizeof (VARIABLE_STORE_HEADER);\r
+\r
+  //\r
+  // Let *MaximumVariableSize be MAX_VARIABLE_SIZE \r
+  //\r
+  *MaximumVariableSize = MAX_VARIABLE_SIZE;\r
+\r
+  //\r
+  // Point to the starting address of the variables.\r
+  //\r
+  Variable = (VARIABLE_HEADER *) (VariableStoreHeader + 1);\r
+\r
+  //\r
+  // Now walk through the related variable store.\r
+  //\r
+  while (Variable < GetEndPointer (VariableStoreHeader)) {\r
+    if (Variable->StartId != VARIABLE_DATA) {\r
+      break;\r
+    }\r
+\r
+    NextVariable = (VARIABLE_HEADER *) (GetVariableDataPtr (Variable) + Variable->DataSize + GET_PAD_SIZE (Variable->DataSize));\r
+    VariableSize = (UINT64) (UINTN) NextVariable - (UINT64) (UINTN) Variable;\r
+\r
+    if (Variable->State == VAR_ADDED) {\r
+      *RemainingVariableStorageSize -= VariableSize;\r
+    }\r
+\r
+    //\r
+    // Go to the next one.\r
+    //\r
+    Variable = NextVariable;\r
+  }\r
+\r
+  return EFI_SUCCESS;\r
+}\r
+#endif\r
+\r
 EFI_STATUS\r
 EFIAPI\r
 InitializeVariableStore (\r