Update RuntimeLib.

[mirror_edk2.git] / EdkModulePkg / Library / EdkUefiRuntimeLib / Common / RuntimeLib.c

/*++\r
\r
Copyright (c) 2006, Intel Corporation                                                         \r
All rights reserved. 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
Module Name:\r
\r
    RuntimeLib.c\r
\r
--*/\r
\r
#include <RuntimeLibInternal.h>\r
\r
//\r
// Driver Lib Module Globals\r
//\r
\r
STATIC EFI_EVENT              mRuntimeNotifyEvent;\r
STATIC EFI_EVENT              mEfiVirtualNotifyEvent;\r
STATIC BOOLEAN                mEfiGoneVirtual         = FALSE;\r
STATIC BOOLEAN                mEfiAtRuntime           = FALSE;\r
\r
EFI_RUNTIME_SERVICES          *mRT;\r
\r
STATIC\r
VOID\r
EFIAPI\r
RuntimeDriverExitBootServices (\r
  IN EFI_EVENT        Event,\r
  IN VOID             *Context\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Set AtRuntime flag as TRUE after ExitBootServices\r
\r
Arguments:\r
\r
  Event   - The Event that is being processed\r
  \r
  Context - Event Context\r
\r
Returns: \r
\r
  None\r
\r
--*/\r
{\r
  EFI_EVENT_NOTIFY  ChildNotifyEventHandler;\r
  UINTN             Index;\r
\r
  for (Index = 0; \r
       _gDriverExitBootServicesEvent[Index] != NULL;\r
       Index++) {\r
    ChildNotifyEventHandler = _gDriverExitBootServicesEvent[Index];\r
    ChildNotifyEventHandler (Event, NULL);\r
  }\r
\r
  //\r
  // Clear out BootService globals\r
  //\r
  gBS             = NULL;\r
\r
  mEfiAtRuntime = TRUE;\r
}\r
\r
STATIC\r
VOID\r
EFIAPI\r
RuntimeLibVirtualNotifyEvent (\r
  IN EFI_EVENT        Event,\r
  IN VOID             *Context\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Fixup internal data so that EFI can be call in virtual mode.\r
  Call the passed in Child Notify event and convert any pointers in \r
  lib to virtual mode.\r
\r
Arguments:\r
\r
  Event   - The Event that is being processed\r
  \r
  Context - Event Context\r
\r
Returns: \r
\r
  None\r
\r
--*/\r
{\r
  UINTN Index;\r
  EFI_EVENT_NOTIFY  ChildNotifyEventHandler;\r
\r
  for (Index = 0; \r
       _gDriverSetVirtualAddressMapEvent[Index] != NULL;\r
       Index++) {\r
    ChildNotifyEventHandler = _gDriverSetVirtualAddressMapEvent[Index];\r
    ChildNotifyEventHandler (Event, NULL);\r
  }\r
\r
  //\r
  // Update global for Runtime Services Table and IO\r
  //\r
  EfiConvertPointer (0, (VOID **) &mRT);\r
\r
  mEfiGoneVirtual = TRUE;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
RuntimeDriverLibConstruct (\r
  IN EFI_HANDLE           ImageHandle,\r
  IN EFI_SYSTEM_TABLE     *SystemTable\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  Intialize runtime Driver Lib if it has not yet been initialized. \r
\r
Arguments:\r
\r
  ImageHandle     - The firmware allocated handle for the EFI image.\r
  \r
  SystemTable     - A pointer to the EFI System Table.\r
\r
  GoVirtualChildEvent - Caller can register a virtual notification event.\r
\r
Returns: \r
\r
  EFI_STATUS always returns EFI_SUCCESS except EFI_ALREADY_STARTED if already started.\r
\r
--*/\r
{\r
  EFI_STATUS  Status;\r
\r
  mRT = SystemTable->RuntimeServices;\r
\r
  //\r
  // Register our ExitBootServices () notify function\r
  //\r
  Status = gBS->CreateEvent (\r
                  EFI_EVENT_SIGNAL_EXIT_BOOT_SERVICES,\r
                  EFI_TPL_NOTIFY,\r
                  RuntimeDriverExitBootServices,\r
                  NULL,\r
                  &mRuntimeNotifyEvent\r
                  );\r
\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Register SetVirtualAddressMap () notify function\r
  // \r
  Status = gBS->CreateEvent (\r
                  EFI_EVENT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,\r
                  EFI_TPL_NOTIFY,\r
                  RuntimeLibVirtualNotifyEvent,\r
                  NULL,\r
                  &mEfiVirtualNotifyEvent\r
                  );\r
\r
  ASSERT_EFI_ERROR (Status);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
RuntimeDriverLibDeconstruct (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
\r
  This routine will free some resources which have been allocated in\r
  EfiInitializeRuntimeDriverLib(). If a runtime driver exits with an error, \r
  it must call this routine to free the allocated resource before the exiting.\r
\r
Arguments:\r
\r
  None\r
\r
Returns: \r
\r
  EFI_SUCCESS     - Shotdown the Runtime Driver Lib successfully\r
  EFI_UNSUPPORTED - Runtime Driver lib was not initialized at all\r
\r
--*/\r
{\r
  EFI_STATUS  Status;\r
\r
  //\r
  // Close our ExitBootServices () notify function\r
  //\r
  Status = gBS->CloseEvent (mRuntimeNotifyEvent);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Close SetVirtualAddressMap () notify function\r
  //\r
  Status = gBS->CloseEvent (mEfiVirtualNotifyEvent);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
BOOLEAN\r
EFIAPI\r
EfiAtRuntime (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
  Return TRUE if ExitBootServices () has been called\r
\r
Arguments:\r
  NONE\r
\r
Returns: \r
  TRUE - If ExitBootServices () has been called\r
\r
--*/\r
{\r
  return mEfiAtRuntime;\r
}\r
\r
BOOLEAN\r
EFIAPI\r
EfiGoneVirtual (\r
  VOID\r
  )\r
/*++\r
\r
Routine Description:\r
  Return TRUE if SetVirtualAddressMap () has been called\r
\r
Arguments:\r
  NONE\r
\r
Returns: \r
  TRUE - If SetVirtualAddressMap () has been called\r
\r
--*/\r
{\r
  return mEfiGoneVirtual;\r
}\r
\r