summaryrefslogtreecommitdiff
path: root/IntelFrameworkModulePkg/Universal/DataHubStdErrDxe/DataHubStdErr.c
blob: 7dd893b3b8eb709a35207710937e83fd6806b6bc (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/** @file
  Data Hub filter driver that takes DEBUG () info from Data Hub and writes it
  to StdErr if it exists.

Copyright (c) 2006 - 2009, 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.

**/

#include <FrameworkDxe.h>
#include <Guid/DataHubStatusCodeRecord.h>
#include <Guid/StatusCodeDataTypeId.h>
#include <Guid/StatusCodeDataTypeDebug.h>
#include <Protocol/DataHub.h>
#include <Protocol/SimpleTextOut.h>

#include <Library/DebugLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/BaseMemoryLib.h>
#include <Library/UefiBootServicesTableLib.h>

EFI_DATA_HUB_PROTOCOL *mDataHub = NULL;

EFI_EVENT             mDataHubStdErrEvent;

/**
  Event handler registered with the Data Hub to parse EFI_DEBUG_CODE. This
  handler reads the Data Hub and sends any DEBUG info to StdErr.

  @param Event      The event that occured, not used
  @param Context    DataHub Protocol Pointer
**/
VOID
EFIAPI
DataHubStdErrEventHandler (
  IN EFI_EVENT Event,
  IN VOID      *Context
  )
{
  EFI_STATUS                           Status;
  EFI_DATA_HUB_PROTOCOL                *DataHub;
  EFI_DATA_RECORD_HEADER               *Record;
  DATA_HUB_STATUS_CODE_DATA_RECORD     *DataRecord;
  UINT64                               Mtc;
  EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL      *Sto;
  INT32                                OldAttribute;

  DataHub = (EFI_DATA_HUB_PROTOCOL *) Context;

  //
  // If StdErr is not yet initialized just return a DEBUG print in the BDS
  // after consoles are connect will make sure data gets flushed properly
  // when StdErr is availible.
  //
  if (gST == NULL) {
    return ;
  }

  if (gST->StdErr == NULL) {
    return ;
  }
  
  //
  // Mtc of zero means return the next record that has not been read by the
  // event handler.
  //
  Mtc = 0;
  do {
    Status = DataHub->GetNextRecord (DataHub, &Mtc, &mDataHubStdErrEvent, &Record);
    if (!EFI_ERROR (Status)) {
      if (CompareGuid (&Record->DataRecordGuid, &gEfiDataHubStatusCodeRecordGuid)) {
        DataRecord = (DATA_HUB_STATUS_CODE_DATA_RECORD *) (((CHAR8 *) Record) + Record->HeaderSize);

        if (DataRecord->Data.HeaderSize > 0) {
          if (CompareGuid (&DataRecord->Data.Type, &gEfiStatusCodeDataTypeDebugGuid)) {
            //
            // If the Data record is from a DEBUG () then send it to Standard Error
            //
            Sto           = gST->StdErr;
            OldAttribute  = Sto->Mode->Attribute;
            Sto->SetAttribute (Sto, EFI_TEXT_ATTR (EFI_MAGENTA, EFI_BLACK));
            Sto->OutputString (Sto, (CHAR16 *) (DataRecord + 1));
            Sto->SetAttribute (Sto, OldAttribute);
          }
        }
      }
    }
  } while ((Mtc != 0) && !EFI_ERROR (Status));
}

/**
  Register an event handler with the Data Hub to parse EFI_DEBUG_CODE. This
  handler reads the Data Hub and sends any DEBUG info to StdErr.

  @param ImageHandle                Image handle of this driver.
  @param SystemTable                Pointer to EFI system table.

  @retval EFI_SUCCESS               The event handler was registered.
  @retval EFI_OUT_OF_RESOURCES      The event hadler was not registered due to lack of system resources.
**/
EFI_STATUS
EFIAPI
DataHubStdErrInitialize (
  IN EFI_HANDLE         ImageHandle,
  IN EFI_SYSTEM_TABLE   *SystemTable
  )
{
  EFI_STATUS  Status;
  UINT64      DataClass;

  gBS->LocateProtocol (&gEfiDataHubProtocolGuid, NULL, (VOID **) &mDataHub);
  //
  // Should never fail due to Depex grammer.
  //
  ASSERT (mDataHub != NULL);

  //
  // Create an event and register it with the filter driver
  //
  Status = gBS->CreateEvent (
                  EVT_NOTIFY_SIGNAL,
                  TPL_CALLBACK,
                  DataHubStdErrEventHandler,
                  mDataHub,
                  &mDataHubStdErrEvent
                  );
  if (EFI_ERROR (Status)) {
    return Status;
  }

  DataClass = EFI_DATA_RECORD_CLASS_DEBUG | EFI_DATA_RECORD_CLASS_ERROR;
  Status = mDataHub->RegisterFilterDriver (
                      mDataHub,
                      mDataHubStdErrEvent,
                      TPL_CALLBACK,
                      DataClass,
                      NULL
                      );
  if (EFI_ERROR (Status)) {
    gBS->CloseEvent (mDataHubStdErrEvent);
  }

  return Status;
}