diff options
Diffstat (limited to 'EdkModulePkg/Library/EdkUefiRuntimeLib/Common/RuntimeLib.c')
| -rw-r--r-- | EdkModulePkg/Library/EdkUefiRuntimeLib/Common/RuntimeLib.c | 258 |
1 files changed, 258 insertions, 0 deletions
diff --git a/EdkModulePkg/Library/EdkUefiRuntimeLib/Common/RuntimeLib.c b/EdkModulePkg/Library/EdkUefiRuntimeLib/Common/RuntimeLib.c new file mode 100644 index 0000000000..adddf933e2 --- /dev/null +++ b/EdkModulePkg/Library/EdkUefiRuntimeLib/Common/RuntimeLib.c @@ -0,0 +1,258 @@ +/*++
+
+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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