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/*++
Copyright (c) 2007, 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 "Tiano.h"
#include "EfiRuntimeLib.h"
#include EFI_GUID_DEFINITION (StatusCodeCallerId)
#include EFI_ARCH_PROTOCOL_DEFINITION (StatusCode)
//
// Driver Lib Module Globals
//
static EFI_RUNTIME_SERVICES *mRT;
static EFI_EVENT mRuntimeNotifyEvent = NULL;
static BOOLEAN mRuntimeLibInitialized = FALSE;
static BOOLEAN mEfiGoneVirtual = FALSE;
//
// Runtime Global, but you should use the Lib functions
//
BOOLEAN mEfiAtRuntime = FALSE;
#if (EFI_SPECIFICATION_VERSION >= 0x00020000)
static EFI_STATUS_CODE_PROTOCOL *gStatusCode = NULL;
#endif
EFI_STATUS
EfiConvertPointer (
IN UINTN DebugDisposition,
IN OUT VOID *Address
)
/*++
Routine Description:
Determines the new virtual address that is to be used on subsequent memory accesses.
Arguments:
DebugDisposition - Supplies type information for the pointer being converted.
Address - A pointer to a pointer that is to be fixed to be the value needed
for the new virtual address mappings being applied.
Returns:
Status code
--*/
{
return mRT->ConvertPointer (DebugDisposition, Address);
}
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
--*/
{
mEfiAtRuntime = TRUE;
}
EFI_STATUS
EfiInitializeRuntimeDriverLib (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable,
IN EFI_EVENT_NOTIFY GoVirtualChildEvent
)
/*++
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;
if (mRuntimeLibInitialized) {
return EFI_ALREADY_STARTED;
}
mRuntimeLibInitialized = TRUE;
gST = SystemTable;
ASSERT (gST != NULL);
gBS = SystemTable->BootServices;
ASSERT (gBS != NULL);
mRT = SystemTable->RuntimeServices;
ASSERT (mRT != NULL);
Status = EfiLibGetSystemConfigurationTable (&gEfiDxeServicesTableGuid, (VOID **) &gDS);
ASSERT_EFI_ERROR (Status);
#if (EFI_SPECIFICATION_VERSION >= 0x00020000)
Status = gBS->LocateProtocol (&gEfiStatusCodeRuntimeProtocolGuid, NULL, (VOID **)&gStatusCode);
if (EFI_ERROR (Status)) {
gStatusCode = NULL;
}
#endif
//
// Register our ExitBootServices () notify function
//
Status = gBS->CreateEvent (
EFI_EVENT_SIGNAL_EXIT_BOOT_SERVICES,
EFI_TPL_NOTIFY,
RuntimeDriverExitBootServices,
NULL,
&mRuntimeNotifyEvent
);
ASSERT_EFI_ERROR (Status);
//
// To NOT register SetVirtualAddressMap () notify function,
// because we do not know how to trigger it without our EBC driver.
//
return EFI_SUCCESS;
}
EFI_STATUS
EfiShutdownRuntimeDriverLib (
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;
if (!mRuntimeLibInitialized) {
//
// You must call EfiInitializeRuntimeDriverLib() first
//
return EFI_UNSUPPORTED;
}
mRuntimeLibInitialized = FALSE;
//
// Close our ExitBootServices () notify function
//
if (mRuntimeNotifyEvent != NULL) {
Status = gBS->CloseEvent (mRuntimeNotifyEvent);
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;
}
EFI_STATUS
EfiReportStatusCode (
IN EFI_STATUS_CODE_TYPE CodeType,
IN EFI_STATUS_CODE_VALUE Value,
IN UINT32 Instance,
IN EFI_GUID * CallerId,
IN EFI_STATUS_CODE_DATA * Data OPTIONAL
)
/*++
Routine Description:
Status Code reporter
Arguments:
CodeType - Type of Status Code.
Value - Value to output for Status Code.
Instance - Instance Number of this status code.
CallerId - ID of the caller of this status code.
Data - Optional data associated with this status code.
Returns:
Status code
--*/
{
return EFI_UNSUPPORTED;
}
//
// Cache Flush Routine.
//
EFI_STATUS
EfiCpuFlushCache (
IN EFI_PHYSICAL_ADDRESS Start,
IN UINT64 Length
)
/*++
Routine Description:
Flush cache with specified range.
Arguments:
Start - Start address
Length - Length in bytes
Returns:
Status code
EFI_SUCCESS - success
--*/
{
return EFI_SUCCESS;
}
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