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