mirror of https://github.com/acidanthera/audk.git
146 lines
4.3 KiB
C
146 lines
4.3 KiB
C
/** @file
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Data Hub filter driver that takes DEBUG () info from Data Hub and writes it
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to StdErr if it exists.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <FrameworkDxe.h>
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#include <Guid/DataHubStatusCodeRecord.h>
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#include <Guid/StatusCodeDataTypeId.h>
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#include <Guid/StatusCodeDataTypeDebug.h>
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#include <Protocol/DataHub.h>
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#include <Protocol/SimpleTextOut.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiDriverEntryPoint.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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EFI_DATA_HUB_PROTOCOL *mDataHub = NULL;
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EFI_EVENT mDataHubStdErrEvent;
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/**
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Event handler registered with the Data Hub to parse EFI_DEBUG_CODE. This
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handler reads the Data Hub and sends any DEBUG info to StdErr.
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@param Event The event that occured, not used
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@param Context DataHub Protocol Pointer
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**/
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VOID
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EFIAPI
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DataHubStdErrEventHandler (
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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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EFI_STATUS Status;
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EFI_DATA_HUB_PROTOCOL *DataHub;
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EFI_DATA_RECORD_HEADER *Record;
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DATA_HUB_STATUS_CODE_DATA_RECORD *DataRecord;
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UINT64 Mtc;
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EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL *Sto;
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INT32 OldAttribute;
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DataHub = (EFI_DATA_HUB_PROTOCOL *) Context;
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//
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// If StdErr is not yet initialized just return a DEBUG print in the BDS
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// after consoles are connect will make sure data gets flushed properly
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// when StdErr is available.
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//
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if (gST == NULL) {
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return ;
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}
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if (gST->StdErr == NULL) {
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return ;
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}
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//
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// Mtc of zero means return the next record that has not been read by the
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// event handler.
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//
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Mtc = 0;
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do {
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Status = DataHub->GetNextRecord (DataHub, &Mtc, &mDataHubStdErrEvent, &Record);
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if (!EFI_ERROR (Status)) {
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if (CompareGuid (&Record->DataRecordGuid, &gEfiDataHubStatusCodeRecordGuid)) {
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DataRecord = (DATA_HUB_STATUS_CODE_DATA_RECORD *) (((CHAR8 *) Record) + Record->HeaderSize);
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if (DataRecord->Data.HeaderSize > 0) {
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if (CompareGuid (&DataRecord->Data.Type, &gEfiStatusCodeDataTypeDebugGuid)) {
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//
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// If the Data record is from a DEBUG () then send it to Standard Error
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//
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Sto = gST->StdErr;
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OldAttribute = Sto->Mode->Attribute;
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Sto->SetAttribute (Sto, EFI_TEXT_ATTR (EFI_MAGENTA, EFI_BLACK));
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Sto->OutputString (Sto, (CHAR16 *) (DataRecord + 1));
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Sto->SetAttribute (Sto, OldAttribute);
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}
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}
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}
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}
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} while ((Mtc != 0) && !EFI_ERROR (Status));
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}
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/**
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Register an event handler with the Data Hub to parse EFI_DEBUG_CODE. This
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handler reads the Data Hub and sends any DEBUG info to StdErr.
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@param ImageHandle Image handle of this driver.
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@param SystemTable Pointer to EFI system table.
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@retval EFI_SUCCESS The event handler was registered.
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@retval EFI_OUT_OF_RESOURCES The event hadler was not registered due to lack of system resources.
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**/
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EFI_STATUS
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EFIAPI
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DataHubStdErrInitialize (
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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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UINT64 DataClass;
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gBS->LocateProtocol (&gEfiDataHubProtocolGuid, NULL, (VOID **) &mDataHub);
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//
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// Should never fail due to Depex grammer.
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//
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ASSERT (mDataHub != NULL);
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//
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// Create an event and register it with the filter driver
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//
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Status = gBS->CreateEvent (
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EVT_NOTIFY_SIGNAL,
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TPL_CALLBACK,
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DataHubStdErrEventHandler,
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mDataHub,
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&mDataHubStdErrEvent
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);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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DataClass = EFI_DATA_RECORD_CLASS_DEBUG | EFI_DATA_RECORD_CLASS_ERROR;
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Status = mDataHub->RegisterFilterDriver (
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mDataHub,
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mDataHubStdErrEvent,
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TPL_CALLBACK,
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DataClass,
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NULL
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);
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if (EFI_ERROR (Status)) {
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gBS->CloseEvent (mDataHubStdErrEvent);
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}
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return Status;
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}
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