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