2 Library utility functions for Runtime driver.
4 Copyright (c) 2006 Intel Corporation. <BR>
5 All rights reserved. This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 #include <RuntimeLibInternal.h>
18 /// Driver Lib Module Globals
21 STATIC EFI_EVENT mEfiVirtualNotifyEvent
;
22 STATIC EFI_EVENT mEfiExitBootServicesEvent
;
23 STATIC BOOLEAN mEfiGoneVirtual
= FALSE
;
24 STATIC BOOLEAN mEfiAtRuntime
= FALSE
;
25 EFI_RUNTIME_SERVICES
*mRT
;
28 Set AtRuntime flag as TRUE after ExitBootServices
30 @param[in] Event The Event that is being processed
31 @param[in] Context Event Context
36 RuntimeLibExitBootServicesEvent (
42 // Clear out BootService globals
50 Fixup internal data so that EFI can be call in virtual mode.
51 Call the passed in Child Notify event and convert any pointers in
54 @param[in] Event The Event that is being processed
55 @param[in] Context Event Context
60 RuntimeLibVirtualNotifyEvent (
66 // Update global for Runtime Services Table and IO
68 EfiConvertPointer (0, (VOID
**) &mRT
);
70 mEfiGoneVirtual
= TRUE
;
74 Intialize runtime Driver Lib if it has not yet been initialized.
76 @param[in] ImageHandle The firmware allocated handle for the EFI image.
77 @param[in] SystemTable A pointer to the EFI System Table.
79 @return EFI_STATUS always returns EFI_SUCCESS except EFI_ALREADY_STARTED if already started.
83 RuntimeDriverLibConstruct (
84 IN EFI_HANDLE ImageHandle
,
85 IN EFI_SYSTEM_TABLE
*SystemTable
90 ASSERT (SystemTable
!= NULL
);
91 mRT
= SystemTable
->RuntimeServices
;
95 // Register SetVirtualAddressMap () notify function
98 Status
= gBS
->CreateEvent (
99 EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE
,
101 RuntimeLibVirtualNotifyEvent
,
103 &mEfiVirtualNotifyEvent
106 ASSERT_EFI_ERROR (Status
);
108 Status
= gBS
->CreateEvent (
109 EVT_SIGNAL_EXIT_BOOT_SERVICES
,
111 RuntimeLibExitBootServicesEvent
,
113 &mEfiExitBootServicesEvent
116 ASSERT_EFI_ERROR (Status
);
122 This routine will free some resources which have been allocated in
123 EfiInitializeRuntimeDriverLib(). If a runtime driver exits with an error,
124 it must call this routine to free the allocated resource before the exiting.
126 @retval EFI_SUCCESS Shutdown the Runtime Driver Lib successfully
127 @retval EFI_UNSUPPORTED Runtime Driver lib was not initialized at all
131 RuntimeDriverLibDeconstruct (
132 IN EFI_HANDLE ImageHandle
,
133 IN EFI_SYSTEM_TABLE
*SystemTable
139 // Close SetVirtualAddressMap () notify function
141 ASSERT (gBS
!= NULL
);
142 Status
= gBS
->CloseEvent (mEfiVirtualNotifyEvent
);
143 ASSERT_EFI_ERROR (Status
);
145 Status
= gBS
->CloseEvent (mEfiExitBootServicesEvent
);
146 ASSERT_EFI_ERROR (Status
);
152 Return TRUE if ExitBootServices () has been called
154 @retval TRUE If ExitBootServices () has been called
162 return mEfiAtRuntime
;
166 Return TRUE if SetVirtualAddressMap () has been called
168 @retval TRUE If SetVirtualAddressMap () has been called
176 return mEfiGoneVirtual
;