summaryrefslogtreecommitdiff
path: root/MdePkg/Library/UefiLib/UefiNotTiano.c
blob: fc3a6ea74a0e44e6b5015b08e5e23391fac12894 (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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
/** @file
  Library functions that abstract areas of conflict between framework and UEFI 2.0.

  Help Port Framework code that has conflicts with UEFI 2.0 by hiding the
  old conflicts with library functions and supporting implementations of the old
  (EDK/EFI 1.10) and new (EDK II/UEFI 2.0) way. This module is a DXE driver as
  it contains DXE enum extensions for EFI event services.

Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
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 "UefiLibInternal.h"

/**
  Creates an EFI event in the Legacy Boot Event Group.

  Prior to UEFI 2.0 this was done via a non blessed UEFI extensions and this library
  abstracts the implementation mechanism of this event from the caller. This function
  abstracts the creation of the Legacy Boot Event. The Framework moved from a proprietary
  to UEFI 2.0 based mechanism.  This library abstracts the caller from how this event
  is created to prevent to code form having to change with the version of the
  specification supported.
  If LegacyBootEvent is NULL, then ASSERT().

  @param  LegacyBootEvent   Returns the EFI event returned from gBS->CreateEvent(Ex).

  @retval EFI_SUCCESS       Event was created.
  @retval Other             Event was not created.

**/
EFI_STATUS
EFIAPI
EfiCreateEventLegacyBoot (
  OUT EFI_EVENT  *LegacyBootEvent
  )
{
  return EfiCreateEventLegacyBootEx (
           TPL_CALLBACK,
           EfiEventEmptyFunction,
           NULL,
           LegacyBootEvent
           );
}

/**
  Create an EFI event in the Legacy Boot Event Group and allows
  the caller to specify a notification function.  
  
  This function abstracts the creation of the Legacy Boot Event.
  The Framework moved from a proprietary to UEFI 2.0 based mechanism.
  This library abstracts the caller from how this event is created to prevent
  to code form having to change with the version of the specification supported.
  If LegacyBootEvent is NULL, then ASSERT().

  @param  NotifyTpl         The task priority level of the event.
  @param  NotifyFunction    The notification function to call when the event is signaled.
  @param  NotifyContext     The content to pass to NotifyFunction when the event is signaled.
  @param  LegacyBootEvent   Returns the EFI event returned from gBS->CreateEvent(Ex).

  @retval EFI_SUCCESS       Event was created.
  @retval Other             Event was not created.

**/
EFI_STATUS
EFIAPI
EfiCreateEventLegacyBootEx (
  IN  EFI_TPL           NotifyTpl,
  IN  EFI_EVENT_NOTIFY  NotifyFunction,  OPTIONAL
  IN  VOID              *NotifyContext,  OPTIONAL
  OUT EFI_EVENT         *LegacyBootEvent
  )
{
  EFI_STATUS        Status;
  EFI_EVENT_NOTIFY  WorkerNotifyFunction;

  ASSERT (LegacyBootEvent != NULL);

  if (gST->Hdr.Revision < EFI_2_00_SYSTEM_TABLE_REVISION) {
    DEBUG ((EFI_D_ERROR, "EFI1.1 can't support LegacyBootEvent!"));
    ASSERT (FALSE);

    return EFI_UNSUPPORTED;
  } else {
    //
    // For UEFI 2.0 and the future use an Event Group
    //
    if (NotifyFunction == NULL) {
      //
      // CreateEventEx will check NotifyFunction is NULL or not and return error.
      // Use dummy routine for the case NotifyFunction is NULL.
      //
      WorkerNotifyFunction = EfiEventEmptyFunction;
    } else {
      WorkerNotifyFunction = NotifyFunction;
    }
    Status = gBS->CreateEventEx (
                    EVT_NOTIFY_SIGNAL,
                    NotifyTpl,
                    WorkerNotifyFunction,
                    NotifyContext,
                    &gEfiEventLegacyBootGuid,
                    LegacyBootEvent
                    );
  }

  return Status;
}

/**
  Create an EFI event in the Ready To Boot Event Group.

  Prior to UEFI 2.0 this was done via a non-standard UEFI extension, and this library
  abstracts the implementation mechanism of this event from the caller.   
  This function abstracts the creation of the Ready to Boot Event.  The Framework 
  moved from a proprietary to UEFI 2.0-based mechanism.  This library abstracts 
  the caller from how this event is created to prevent the code form having to 
  change with the version of the specification supported.
  If ReadyToBootEvent is NULL, then ASSERT().

  @param  ReadyToBootEvent  Returns the EFI event returned from gBS->CreateEvent(Ex).

  @retval EFI_SUCCESS       Event was created.
  @retval Other             Event was not created.

**/
EFI_STATUS
EFIAPI
EfiCreateEventReadyToBoot (
  OUT EFI_EVENT  *ReadyToBootEvent
  )
{
  return EfiCreateEventReadyToBootEx (
           TPL_CALLBACK,
           EfiEventEmptyFunction,
           NULL,
           ReadyToBootEvent
           );
}

/**
  Create an EFI event in the Ready To Boot Event Group and allows
  the caller to specify a notification function.  
  
  This function abstracts the creation of the Ready to Boot Event.
  The Framework moved from a proprietary to UEFI 2.0 based mechanism.
  This library abstracts the caller from how this event is created to prevent
  to code form having to change with the version of the specification supported.
  If ReadyToBootEvent is NULL, then ASSERT().

  @param  NotifyTpl         The task priority level of the event.
  @param  NotifyFunction    The notification function to call when the event is signaled.
  @param  NotifyContext     The content to pass to NotifyFunction when the event is signaled.
  @param  ReadyToBootEvent  Returns the EFI event returned from gBS->CreateEvent(Ex).

  @retval EFI_SUCCESS       Event was created.
  @retval Other             Event was not created.

**/
EFI_STATUS
EFIAPI
EfiCreateEventReadyToBootEx (
  IN  EFI_TPL           NotifyTpl,
  IN  EFI_EVENT_NOTIFY  NotifyFunction,  OPTIONAL
  IN  VOID              *NotifyContext,  OPTIONAL
  OUT EFI_EVENT         *ReadyToBootEvent
  )
{
  EFI_STATUS        Status;
  EFI_EVENT_NOTIFY  WorkerNotifyFunction;

  ASSERT (ReadyToBootEvent != NULL);

  if (gST->Hdr.Revision < EFI_2_00_SYSTEM_TABLE_REVISION) {
    DEBUG ((EFI_D_ERROR, "EFI1.1 can't support ReadyToBootEvent!"));
    ASSERT (FALSE);

    return EFI_UNSUPPORTED;
  } else {
    //
    // For UEFI 2.0 and the future use an Event Group
    //
    if (NotifyFunction == NULL) {
      //
      // CreateEventEx will check NotifyFunction is NULL or not and return error.
      // Use dummy routine for the case NotifyFunction is NULL.
      //
      WorkerNotifyFunction = EfiEventEmptyFunction;
    } else {
      WorkerNotifyFunction = NotifyFunction;
    }
    Status = gBS->CreateEventEx (
                    EVT_NOTIFY_SIGNAL,
                    NotifyTpl,
                    WorkerNotifyFunction,
                    NotifyContext,
                    &gEfiEventReadyToBootGuid,
                    ReadyToBootEvent
                    );
  }

  return Status;
}


/**
  Create, Signal, and Close the Ready to Boot event using EfiSignalEventReadyToBoot().
  
  This function abstracts the signaling of the Ready to Boot Event. The Framework moved
  from a proprietary to UEFI 2.0 based mechanism. This library abstracts the caller
  from how this event is created to prevent to code form having to change with the
  version of the specification supported.

**/
VOID
EFIAPI
EfiSignalEventReadyToBoot (
  VOID
  )
{
  EFI_STATUS    Status;
  EFI_EVENT     ReadyToBootEvent;

  Status = EfiCreateEventReadyToBoot (&ReadyToBootEvent);
  if (!EFI_ERROR (Status)) {
    gBS->SignalEvent (ReadyToBootEvent);
    gBS->CloseEvent (ReadyToBootEvent);
  }
}

/**
  Create, Signal, and Close the Ready to Boot event using EfiSignalEventLegacyBoot().

  This function abstracts the signaling of the Legacy Boot Event. The Framework moved from
  a proprietary to UEFI 2.0 based mechanism.  This library abstracts the caller from how
  this event is created to prevent to code form having to change with the version of the
  specification supported.

**/
VOID
EFIAPI
EfiSignalEventLegacyBoot (
  VOID
  )
{
  EFI_STATUS    Status;
  EFI_EVENT     LegacyBootEvent;

  Status = EfiCreateEventLegacyBoot (&LegacyBootEvent);
  if (!EFI_ERROR (Status)) {
    gBS->SignalEvent (LegacyBootEvent);
    gBS->CloseEvent (LegacyBootEvent);
  }
}


/**
  Check to see if the Firmware Volume (FV) Media Device Path is valid 
  
  The Framework FwVol Device Path changed to conform to the UEFI 2.0 specification.  
  This library function abstracts validating a device path node.
  Check the MEDIA_FW_VOL_FILEPATH_DEVICE_PATH data structure to see if it's valid.  
  If it is valid, then return the GUID file name from the device path node.  Otherwise, 
  return NULL.  This device path changed in the DXE CIS version 0.92 in a non back ward 
  compatible way to not conflict with the UEFI 2.0 specification.  This function abstracts 
  the differences from the caller.
  If FvDevicePathNode is NULL, then ASSERT().

  @param  FvDevicePathNode  The pointer to FV device path to check.

  @retval NULL              FvDevicePathNode is not valid.
  @retval Other             FvDevicePathNode is valid and pointer to NameGuid was returned.

**/
EFI_GUID *
EFIAPI
EfiGetNameGuidFromFwVolDevicePathNode (
  IN CONST MEDIA_FW_VOL_FILEPATH_DEVICE_PATH  *FvDevicePathNode
  )
{
  ASSERT (FvDevicePathNode != NULL);

  if (DevicePathType (&FvDevicePathNode->Header) == MEDIA_DEVICE_PATH &&
      DevicePathSubType (&FvDevicePathNode->Header) == MEDIA_PIWG_FW_FILE_DP) {
    return (EFI_GUID *) &FvDevicePathNode->FvFileName;
  }

  return NULL;
}


/**
  Initialize a Firmware Volume (FV) Media Device Path node.
  
  The Framework FwVol Device Path changed to conform to the UEFI 2.0 specification.  
  This library function abstracts initializing a device path node.  
  Initialize the MEDIA_FW_VOL_FILEPATH_DEVICE_PATH data structure.  This device 
  path changed in the DXE CIS version 0.92 in a non back ward compatible way to 
  not conflict with the UEFI 2.0 specification.  This function abstracts the 
  differences from the caller.
  If FvDevicePathNode is NULL, then ASSERT().
  If NameGuid is NULL, then ASSERT().
  
  @param  FvDevicePathNode  The pointer to a FV device path node to initialize
  @param  NameGuid          FV file name to use in FvDevicePathNode

**/
VOID
EFIAPI
EfiInitializeFwVolDevicepathNode (
  IN OUT MEDIA_FW_VOL_FILEPATH_DEVICE_PATH  *FvDevicePathNode,
  IN CONST EFI_GUID                         *NameGuid
  )
{
  ASSERT (FvDevicePathNode != NULL);
  ASSERT (NameGuid          != NULL);

  //
  // Use the new Device path that does not conflict with the UEFI
  //
  FvDevicePathNode->Header.Type     = MEDIA_DEVICE_PATH;
  FvDevicePathNode->Header.SubType  = MEDIA_PIWG_FW_FILE_DP;
  SetDevicePathNodeLength (&FvDevicePathNode->Header, sizeof (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH));

  CopyGuid (&FvDevicePathNode->FvFileName, NameGuid);
}