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/** @file
UEFI Runtime Library implementation for non IPF processor types.
Copyright (c) 2006 - 2008 Intel Corporation. <BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "RuntimeLibInternal.h"
///
/// Driver Lib Module Globals
///
EFI_EVENT mEfiVirtualNotifyEvent;
EFI_EVENT mEfiExitBootServicesEvent;
BOOLEAN mEfiGoneVirtual = FALSE;
BOOLEAN mEfiAtRuntime = FALSE;
EFI_RUNTIME_SERVICES *mRT;
/**
Set AtRuntime flag as TRUE after ExitBootServices.
@param[in] Event The Event that is being processed
@param[in] Context Event Context
**/
VOID
EFIAPI
RuntimeLibExitBootServicesEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
//
// Clear out BootService globals
//
gBS = NULL;
mEfiAtRuntime = TRUE;
}
/**
Fixup internal data so that EFI can be call in virtual mode.
Call the passed in Child Notify event and convert any pointers in
lib to virtual mode.
@param[in] Event The Event that is being processed
@param[in] Context Event Context
**/
VOID
EFIAPI
RuntimeLibVirtualNotifyEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
//
// Update global for Runtime Services Table and IO
//
EfiConvertPointer (0, (VOID **) &mRT);
mEfiGoneVirtual = TRUE;
}
/**
Intialize runtime Driver Lib if it has not yet been initialized.
It will ASSERT() if gRT is NULL or gBS is NULL.
It will ASSERT() if that operation fails.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@return EFI_STATUS always returns EFI_SUCCESS except EFI_ALREADY_STARTED if already started.
**/
EFI_STATUS
EFIAPI
RuntimeDriverLibConstruct (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
ASSERT (gRT != NULL);
ASSERT (gBS != NULL);
mRT = gRT;
//
// Register SetVirtualAddressMap () notify function
//
Status = gBS->CreateEvent (
EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,
TPL_NOTIFY,
RuntimeLibVirtualNotifyEvent,
NULL,
&mEfiVirtualNotifyEvent
);
ASSERT_EFI_ERROR (Status);
Status = gBS->CreateEvent (
EVT_SIGNAL_EXIT_BOOT_SERVICES,
TPL_NOTIFY,
RuntimeLibExitBootServicesEvent,
NULL,
&mEfiExitBootServicesEvent
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
If a runtime driver exits with an error, it must call this routine
to free the allocated resource before the exiting.
It will ASSERT() if gBS is NULL.
It will ASSERT() if that operation fails.
@param[in] ImageHandle The firmware allocated handle for the EFI image.
@param[in] SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS Shutdown the Runtime Driver Lib successfully
@retval EFI_UNSUPPORTED Runtime Driver lib was not initialized at all
**/
EFI_STATUS
EFIAPI
RuntimeDriverLibDeconstruct (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Close SetVirtualAddressMap () notify function
//
ASSERT (gBS != NULL);
Status = gBS->CloseEvent (mEfiVirtualNotifyEvent);
ASSERT_EFI_ERROR (Status);
Status = gBS->CloseEvent (mEfiExitBootServicesEvent);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
This function allows the caller to determine if UEFI ExitBootServices() has been called.
This function returns TRUE after all the EVT_SIGNAL_EXIT_BOOT_SERVICES functions have
executed as a result of the OS calling ExitBootServices(). Prior to this time FALSE
is returned. This function is used by runtime code to decide it is legal to access
services that go away after ExitBootServices().
@retval TRUE The system has finished executing the EVT_SIGNAL_EXIT_BOOT_SERVICES event.
@retval FALSE The system has not finished executing the EVT_SIGNAL_EXIT_BOOT_SERVICES event.
**/
BOOLEAN
EFIAPI
EfiAtRuntime (
VOID
)
{
return mEfiAtRuntime;
}
/**
This function allows the caller to determine if UEFI SetVirtualAddressMap() has been called.
This function returns TRUE after all the EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE functions have
executed as a result of the OS calling SetVirtualAddressMap(). Prior to this time FALSE
is returned. This function is used by runtime code to decide it is legal to access services
that go away after SetVirtualAddressMap().
@retval TRUE The system has finished executing the EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.
@retval FALSE The system has not finished executing the EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.
**/
BOOLEAN
EFIAPI
EfiGoneVirtual (
VOID
)
{
return mEfiGoneVirtual;
}
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