diff options
Diffstat (limited to 'EdkModulePkg/Library/EdkUefiRuntimeLib/Ipf/RuntimeLib.c')
| -rw-r--r-- | EdkModulePkg/Library/EdkUefiRuntimeLib/Ipf/RuntimeLib.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/EdkModulePkg/Library/EdkUefiRuntimeLib/Ipf/RuntimeLib.c b/EdkModulePkg/Library/EdkUefiRuntimeLib/Ipf/RuntimeLib.c new file mode 100644 index 0000000000..a4eeb33838 --- /dev/null +++ b/EdkModulePkg/Library/EdkUefiRuntimeLib/Ipf/RuntimeLib.c @@ -0,0 +1,284 @@ +/*++
+
+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 <SalApi.h>
+#include <RuntimeLibInternal.h>
+
+//
+// Driver Lib Module Globals
+//
+
+STATIC EFI_EVENT mRuntimeNotifyEvent;
+STATIC EFI_EVENT mEfiVirtualNotifyEvent;
+
+STATIC EFI_PLABEL mPlabel;
+STATIC EXTENDED_SAL_BOOT_SERVICE_PROTOCOL *mEsalBootService;
+
+EFI_RUNTIME_SERVICES *mRT = NULL;
+
+STATIC
+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);
+ }
+}
+
+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);
+ }
+
+ mRT->ConvertPointer (0x0, (VOID **) &mPlabel.EntryPoint);
+ mRT->ConvertPointer (EFI_IPF_GP_POINTER, (VOID **) &mPlabel.GP);
+
+ SetEsalVirtualEntryPoint (mPlabel.EntryPoint, mPlabel.GP);
+
+ //
+ // Clear out BootService globals
+ //
+ gBS = NULL;
+ gST = NULL;
+ mRT = NULL;
+}
+
+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_PLABEL *Plabel;
+ EFI_STATUS Status;
+
+ mRT = SystemTable->RuntimeServices;
+
+ //
+ // The protocol contains a function pointer, which is an indirect procedure call.
+ // An indirect procedure call goes through a plabel, and pointer to a function is
+ // a pointer to a plabel. To implement indirect procedure calls that can work in
+ // both physical and virtual mode, two plabels are required (one physical and one
+ // virtual). So lets grap the physical PLABEL for the EsalEntryPoint and store it
+ // away. We cache it in a module global, so we can register the vitrual version.
+ //
+ Status = gBS->LocateProtocol (&gEfiExtendedSalBootServiceProtocolGuid, NULL, &mEsalBootService);
+ ASSERT_EFI_ERROR (Status);
+
+ Plabel = (EFI_PLABEL *) (UINTN) mEsalBootService->ExtendedSalProc;
+
+ mPlabel.EntryPoint = Plabel->EntryPoint;
+ mPlabel.GP = Plabel->GP;
+
+ SetEsalPhysicalEntryPoint (mPlabel.EntryPoint, mPlabel.GP);
+
+ //
+ // 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 ExitBootService () has been called
+
+Arguments:
+ NONE
+
+Returns:
+ TRUE - If ExitBootService () has been called
+
+--*/
+{
+ EFI_GUID Guid = EFI_EXTENDED_SAL_VIRTUAL_SERVICES_PROTOCOL_GUID;
+ SAL_RETURN_REGS ReturnReg;
+
+ ReturnReg = EfiCallEsalService (&Guid, IsEfiRuntime, 0, 0, 0, 0, 0, 0, 0);
+
+ return (BOOLEAN) (ReturnReg.r9 == 1);
+}
+
+BOOLEAN
+EfiGoneVirtual (
+ VOID
+ )
+/*++
+
+Routine Description:
+ Return TRUE if SetVirtualAddressMap () has been called
+
+Arguments:
+ NONE
+
+Returns:
+ TRUE - If SetVirtualAddressMap () has been called
+
+--*/
+{
+ EFI_GUID Guid = EFI_EXTENDED_SAL_VIRTUAL_SERVICES_PROTOCOL_GUID;
+ SAL_RETURN_REGS ReturnReg;
+
+ ReturnReg = EfiCallEsalService (&Guid, IsVirtual, 0, 0, 0, 0, 0, 0, 0);
+
+ return (BOOLEAN) (ReturnReg.r9 == 1);
+}
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