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
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
|
/** @file
Provides a way for 3rd party applications to register themselves for launch by the
Boot Manager based on hot key
Copyright (c) 2007 - 2008, Intel Corporation. <BR>
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 "Hotkey.h"
LIST_ENTRY mHotkeyList = INITIALIZE_LIST_HEAD_VARIABLE (mHotkeyList);
BOOLEAN mHotkeyCallbackPending = FALSE;
EFI_EVENT mHotkeyEvent;
VOID *mHotkeyRegistration;
/**
Check if the Key Option is valid or not.
@param KeyOption The Hot Key Option to be checked.
@retval TRUE The Hot Key Option is valid.
@retval FALSE The Hot Key Option is invalid.
**/
BOOLEAN
IsKeyOptionValid (
IN EFI_KEY_OPTION *KeyOption
)
{
UINT16 BootOptionName[10];
UINT8 *BootOptionVar;
UINTN BootOptionSize;
UINT32 Crc;
//
// Check whether corresponding Boot Option exist
//
UnicodeSPrint (BootOptionName, sizeof (BootOptionName), L"Boot%04x", KeyOption->BootOption);
BootOptionVar = BdsLibGetVariableAndSize (
BootOptionName,
&gEfiGlobalVariableGuid,
&BootOptionSize
);
if (BootOptionVar == NULL || BootOptionSize == 0) {
return FALSE;
}
//
// Check CRC for Boot Option
//
gBS->CalculateCrc32 (BootOptionVar, BootOptionSize, &Crc);
FreePool (BootOptionVar);
return (BOOLEAN) ((KeyOption->BootOptionCrc == Crc) ? TRUE : FALSE);
}
/**
Create Key#### for the given hotkey.
@param KeyOption The Hot Key Option to be added.
@param KeyOptionNumber The key option number for Key#### (optional).
@retval EFI_SUCCESS Register hotkey successfully.
@retval EFI_INVALID_PARAMETER The hotkey option is invalid.
**/
EFI_STATUS
RegisterHotkey (
IN EFI_KEY_OPTION *KeyOption,
OUT UINT16 *KeyOptionNumber
)
{
UINT16 KeyOptionName[10];
UINT16 *KeyOrder;
UINTN KeyOrderSize;
UINT16 *NewKeyOrder;
UINTN Index;
UINT16 MaxOptionNumber;
UINT16 RegisterOptionNumber;
EFI_KEY_OPTION *TempOption;
UINTN TempOptionSize;
EFI_STATUS Status;
UINTN KeyOptionSize;
BOOLEAN UpdateBootOption;
//
// Validate the given key option
//
if (!IsKeyOptionValid (KeyOption)) {
return EFI_INVALID_PARAMETER;
}
KeyOptionSize = sizeof (EFI_KEY_OPTION) + GET_KEY_CODE_COUNT (KeyOption->KeyOptions.PackedValue) * sizeof (EFI_INPUT_KEY);
UpdateBootOption = FALSE;
//
// check whether HotKey conflict with keys used by Setup Browser
//
KeyOrder = BdsLibGetVariableAndSize (
VAR_KEY_ORDER,
&gEfiGlobalVariableGuid,
&KeyOrderSize
);
if (KeyOrder == NULL) {
KeyOrderSize = 0;
}
//
// Find free key option number
//
MaxOptionNumber = 0;
TempOption = NULL;
for (Index = 0; Index < KeyOrderSize / sizeof (UINT16); Index++) {
if (MaxOptionNumber < KeyOrder[Index]) {
MaxOptionNumber = KeyOrder[Index];
}
UnicodeSPrint (KeyOptionName, sizeof (KeyOptionName), L"Key%04x", KeyOrder[Index]);
TempOption = BdsLibGetVariableAndSize (
KeyOptionName,
&gEfiGlobalVariableGuid,
&TempOptionSize
);
if (CompareMem (TempOption, KeyOption, TempOptionSize) == 0) {
//
// Got the option, so just return
//
FreePool (TempOption);
FreePool (KeyOrder);
return EFI_SUCCESS;
}
if (KeyOption->KeyOptions.PackedValue == TempOption->KeyOptions.PackedValue) {
if (GET_KEY_CODE_COUNT (KeyOption->KeyOptions.PackedValue) == 0 ||
CompareMem (
((UINT8 *) TempOption) + sizeof (EFI_KEY_OPTION),
((UINT8 *) KeyOption) + sizeof (EFI_KEY_OPTION),
KeyOptionSize - sizeof (EFI_KEY_OPTION)
) == 0) {
//
// Hotkey is the same but BootOption changed, need update
//
UpdateBootOption = TRUE;
break;
}
}
FreePool (TempOption);
}
if (UpdateBootOption) {
RegisterOptionNumber = KeyOrder[Index];
FreePool (TempOption);
} else {
RegisterOptionNumber = (UINT16) (MaxOptionNumber + 1);
}
if (KeyOptionNumber != NULL) {
*KeyOptionNumber = RegisterOptionNumber;
}
//
// Create variable Key####
//
UnicodeSPrint (KeyOptionName, sizeof (KeyOptionName), L"Key%04x", RegisterOptionNumber);
Status = gRT->SetVariable (
KeyOptionName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
KeyOptionSize,
KeyOption
);
if (EFI_ERROR (Status)) {
gBS->FreePool (KeyOrder);
return Status;
}
//
// Update the key order variable - "KeyOrder"
//
if (!UpdateBootOption) {
Index = KeyOrderSize / sizeof (UINT16);
KeyOrderSize += sizeof (UINT16);
}
NewKeyOrder = AllocatePool (KeyOrderSize);
if (NewKeyOrder == NULL) {
return EFI_OUT_OF_RESOURCES;
}
if (KeyOrder != NULL) {
CopyMem (NewKeyOrder, KeyOrder, KeyOrderSize);
}
NewKeyOrder[Index] = RegisterOptionNumber;
Status = gRT->SetVariable (
VAR_KEY_ORDER,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
KeyOrderSize,
NewKeyOrder
);
FreePool (KeyOrder);
FreePool (NewKeyOrder);
return Status;
}
/**
Delete Key#### for the given Key Option number.
@param KeyOptionNumber Key option number for Key####
@retval EFI_SUCCESS Unregister hotkey successfully.
@retval EFI_NOT_FOUND No Key#### is found for the given Key Option number.
**/
EFI_STATUS
UnregisterHotkey (
IN UINT16 KeyOptionNumber
)
{
UINT16 KeyOption[10];
UINTN Index;
EFI_STATUS Status;
UINTN Index2Del;
UINT16 *KeyOrder;
UINTN KeyOrderSize;
//
// Delete variable Key####
//
UnicodeSPrint (KeyOption, sizeof (KeyOption), L"Key%04x", KeyOptionNumber);
gRT->SetVariable (
KeyOption,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
0,
NULL
);
//
// Adjust key order array
//
KeyOrder = BdsLibGetVariableAndSize (
VAR_KEY_ORDER,
&gEfiGlobalVariableGuid,
&KeyOrderSize
);
if (KeyOrder == NULL) {
return EFI_SUCCESS;
}
Index2Del = 0;
for (Index = 0; Index < KeyOrderSize / sizeof (UINT16); Index++) {
if (KeyOrder[Index] == KeyOptionNumber) {
Index2Del = Index;
break;
}
}
if (Index != KeyOrderSize / sizeof (UINT16)) {
//
// KeyOptionNumber found in "KeyOrder", delete it
//
for (Index = Index2Del; Index < KeyOrderSize / sizeof (UINT16) - 1; Index++) {
KeyOrder[Index] = KeyOrder[Index + 1];
}
KeyOrderSize -= sizeof (UINT16);
}
Status = gRT->SetVariable (
VAR_KEY_ORDER,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
KeyOrderSize,
KeyOrder
);
FreePool (KeyOrder);
return Status;
}
/**
This is the common notification function for HotKeys, it will be registered
with SimpleTextInEx protocol interface - RegisterKeyNotify() of ConIn handle.
@param KeyData A pointer to a buffer that is filled in with the keystroke
information for the key that was pressed.
@retval EFI_SUCCESS KeyData is successfully processed.
**/
EFI_STATUS
HotkeyCallback (
IN EFI_KEY_DATA *KeyData
)
{
BOOLEAN HotkeyCatched;
LIST_ENTRY BootLists;
LIST_ENTRY *Link;
BDS_HOTKEY_OPTION *Hotkey;
UINT16 Buffer[10];
BDS_COMMON_OPTION *BootOption;
UINTN ExitDataSize;
CHAR16 *ExitData;
EFI_STATUS Status;
EFI_KEY_DATA *HotkeyData;
if (mHotkeyCallbackPending) {
//
// When responsing to a Hotkey, ignore sequential hotkey stroke until
// the current Boot#### load option returned
//
return EFI_SUCCESS;
}
Status = EFI_SUCCESS;
Link = GetFirstNode (&mHotkeyList);
while (!IsNull (&mHotkeyList, Link)) {
HotkeyCatched = FALSE;
Hotkey = BDS_HOTKEY_OPTION_FROM_LINK (Link);
//
// Is this Key Stroke we are waiting for?
//
HotkeyData = &Hotkey->KeyData[Hotkey->WaitingKey];
if ((KeyData->Key.ScanCode == HotkeyData->Key.ScanCode) &&
(KeyData->Key.UnicodeChar == HotkeyData->Key.UnicodeChar) &&
((HotkeyData->KeyState.KeyShiftState & EFI_SHIFT_STATE_VALID) ? (KeyData->KeyState.KeyShiftState == HotkeyData->KeyState.KeyShiftState) : 1)) {
//
// Receive an expecting key stroke
//
if (Hotkey->CodeCount > 1) {
//
// For hotkey of key combination, transit to next waiting state
//
Hotkey->WaitingKey++;
if (Hotkey->WaitingKey == Hotkey->CodeCount) {
//
// Received the whole key stroke sequence
//
HotkeyCatched = TRUE;
}
} else {
//
// For hotkey of single key stroke
//
HotkeyCatched = TRUE;
}
} else {
//
// Receive an unexpected key stroke, reset to initial waiting state
//
Hotkey->WaitingKey = 0;
}
if (HotkeyCatched) {
//
// Reset to initial waiting state
//
Hotkey->WaitingKey = 0;
//
// Launch its BootOption
//
InitializeListHead (&BootLists);
UnicodeSPrint (Buffer, sizeof (Buffer), L"Boot%04x", Hotkey->BootOptionNumber);
BootOption = BdsLibVariableToOption (&BootLists, Buffer);
BootOption->BootCurrent = Hotkey->BootOptionNumber;
BdsLibConnectDevicePath (BootOption->DevicePath);
//
// Clear the screen before launch this BootOption
//
gST->ConOut->Reset (gST->ConOut, FALSE);
mHotkeyCallbackPending = TRUE;
Status = BdsLibBootViaBootOption (BootOption, BootOption->DevicePath, &ExitDataSize, &ExitData);
mHotkeyCallbackPending = FALSE;
if (EFI_ERROR (Status)) {
//
// Call platform action to indicate the boot fail
//
BootOption->StatusString = GetStringById (STRING_TOKEN (STR_BOOT_FAILED));
PlatformBdsBootFail (BootOption, Status, ExitData, ExitDataSize);
} else {
//
// Call platform action to indicate the boot success
//
BootOption->StatusString = GetStringById (STRING_TOKEN (STR_BOOT_SUCCEEDED));
PlatformBdsBootSuccess (BootOption);
}
}
Link = GetNextNode (&mHotkeyList, Link);
}
return Status;
}
/**
Register the common HotKey notify function to given SimpleTextInEx protocol instance.
@param SimpleTextInEx Simple Text Input Ex protocol instance
@retval EFI_SUCCESS Register hotkey notification function successfully.
@retval EFI_OUT_OF_RESOURCES Unable to allocate necessary data structures.
**/
EFI_STATUS
HotkeyRegisterNotify (
IN EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *SimpleTextInEx
)
{
UINTN Index;
EFI_STATUS Status;
LIST_ENTRY *Link;
BDS_HOTKEY_OPTION *Hotkey;
//
// Register notification function for each hotkey
//
Link = GetFirstNode (&mHotkeyList);
while (!IsNull (&mHotkeyList, Link)) {
Hotkey = BDS_HOTKEY_OPTION_FROM_LINK (Link);
Index = 0;
do {
Status = SimpleTextInEx->RegisterKeyNotify (
SimpleTextInEx,
&Hotkey->KeyData[Index],
HotkeyCallback,
&Hotkey->NotifyHandle
);
if (EFI_ERROR (Status)) {
//
// some of the hotkey registry failed
//
return Status;
}
Index ++;
} while (Index < Hotkey->CodeCount);
Link = GetNextNode (&mHotkeyList, Link);
}
return EFI_SUCCESS;
}
/**
Callback function for SimpleTextInEx protocol install events
@param Event the event that is signaled.
@param Context not used here.
@return VOID
**/
VOID
EFIAPI
HotkeyEvent (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_STATUS Status;
UINTN BufferSize;
EFI_HANDLE Handle;
EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL *SimpleTextInEx;
while (TRUE) {
BufferSize = sizeof (EFI_HANDLE);
Status = gBS->LocateHandle (
ByRegisterNotify,
NULL,
mHotkeyRegistration,
&BufferSize,
&Handle
);
if (EFI_ERROR (Status)) {
//
// If no more notification events exist
//
return ;
}
Status = gBS->HandleProtocol (
Handle,
&gEfiSimpleTextInputExProtocolGuid,
(VOID **) &SimpleTextInEx
);
ASSERT_EFI_ERROR (Status);
HotkeyRegisterNotify (SimpleTextInEx);
}
}
/**
Insert Key Option to hotkey list.
@param KeyOption The Hot Key Option to be added to hotkey list.
@retval EFI_SUCCESS Add to hotkey list success.
**/
EFI_STATUS
HotkeyInsertList (
IN EFI_KEY_OPTION *KeyOption
)
{
BDS_HOTKEY_OPTION *HotkeyLeft;
BDS_HOTKEY_OPTION *HotkeyRight;
UINTN Index;
UINT32 KeyOptions;
UINT32 KeyShiftStateLeft;
UINT32 KeyShiftStateRight;
EFI_INPUT_KEY *InputKey;
EFI_KEY_DATA *KeyData;
HotkeyLeft = AllocateZeroPool (sizeof (BDS_HOTKEY_OPTION));
if (HotkeyLeft == NULL) {
return EFI_OUT_OF_RESOURCES;
}
HotkeyLeft->Signature = BDS_HOTKEY_OPTION_SIGNATURE;
HotkeyLeft->BootOptionNumber = KeyOption->BootOption;
KeyOptions = KeyOption->KeyOptions.PackedValue;
HotkeyLeft->CodeCount = (UINT8) GET_KEY_CODE_COUNT (KeyOptions);
//
// Map key shift state from KeyOptions to EFI_KEY_DATA.KeyState
//
KeyShiftStateRight = (KeyOptions & EFI_KEY_OPTION_SHIFT) |
((KeyOptions & EFI_KEY_OPTION_CONTROL) << 1) |
((KeyOptions & EFI_KEY_OPTION_ALT) << 2) |
((KeyOptions & EFI_KEY_OPTION_LOGO) << 3) |
((KeyOptions & (EFI_KEY_OPTION_MENU | EFI_KEY_OPTION_SYSREQ)) << 4) |
EFI_SHIFT_STATE_VALID;
KeyShiftStateLeft = (KeyShiftStateRight & 0xffffff00) | ((KeyShiftStateRight & 0xff) << 1);
InputKey = (EFI_INPUT_KEY *) (((UINT8 *) KeyOption) + sizeof (EFI_KEY_OPTION));
Index = 0;
KeyData = &HotkeyLeft->KeyData[0];
do {
//
// If Key CodeCount is 0, then only KeyData[0] is used;
// if Key CodeCount is n, then KeyData[0]~KeyData[n-1] are used
//
KeyData->Key.ScanCode = InputKey[Index].ScanCode;
KeyData->Key.UnicodeChar = InputKey[Index].UnicodeChar;
KeyData->KeyState.KeyShiftState = KeyShiftStateLeft;
Index++;
KeyData++;
} while (Index < HotkeyLeft->CodeCount);
InsertTailList (&mHotkeyList, &HotkeyLeft->Link);
if (KeyShiftStateLeft != KeyShiftStateRight) {
//
// Need an extra hotkey for shift key on right
//
HotkeyRight = AllocateCopyPool (sizeof (BDS_HOTKEY_OPTION), HotkeyLeft);
if (HotkeyRight == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Index = 0;
KeyData = &HotkeyRight->KeyData[0];
do {
//
// Key.ScanCode and Key.UnicodeChar have already been initialized,
// only need to update KeyState.KeyShiftState
//
KeyData->KeyState.KeyShiftState = KeyShiftStateRight;
Index++;
KeyData++;
} while (Index < HotkeyRight->CodeCount);
InsertTailList (&mHotkeyList, &HotkeyRight->Link);
}
return EFI_SUCCESS;
}
/**
Process all the "Key####" variables, associate Hotkeys with corresponding Boot Options.
@retval EFI_SUCCESS Hotkey services successfully initialized.
@retval EFI_NOT_FOUND Can not find the "KeyOrder" variable
**/
EFI_STATUS
InitializeHotkeyService (
VOID
)
{
EFI_STATUS Status;
UINT32 BootOptionSupport;
UINT16 *KeyOrder;
UINTN KeyOrderSize;
UINTN Index;
UINT16 KeyOptionName[8];
UINTN KeyOptionSize;
EFI_KEY_OPTION *KeyOption;
//
// Export our capability - EFI_BOOT_OPTION_SUPPORT_KEY and EFI_BOOT_OPTION_SUPPORT_APP
//
BootOptionSupport = EFI_BOOT_OPTION_SUPPORT_KEY | EFI_BOOT_OPTION_SUPPORT_APP;
Status = gRT->SetVariable (
L"BootOptionSupport",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
sizeof (UINT32),
&BootOptionSupport
);
//
// Get valid Key Option List from private EFI variable "KeyOrder"
//
KeyOrder = BdsLibGetVariableAndSize (
VAR_KEY_ORDER,
&gEfiGlobalVariableGuid,
&KeyOrderSize
);
if (KeyOrder == NULL) {
return EFI_NOT_FOUND;
}
for (Index = 0; Index < KeyOrderSize / sizeof (UINT16); Index ++) {
UnicodeSPrint (KeyOptionName, sizeof (KeyOptionName), L"Key%04x", KeyOrder[Index]);
KeyOption = BdsLibGetVariableAndSize (
KeyOptionName,
&gEfiGlobalVariableGuid,
&KeyOptionSize
);
if (KeyOption == NULL || !IsKeyOptionValid (KeyOption)) {
UnregisterHotkey (KeyOrder[Index]);
} else {
HotkeyInsertList (KeyOption);
}
}
//
// Register Protocol notify for Hotkey service
//
Status = gBS->CreateEvent (
EVT_NOTIFY_SIGNAL,
TPL_CALLBACK,
HotkeyEvent,
NULL,
&mHotkeyEvent
);
ASSERT_EFI_ERROR (Status);
//
// Register for protocol notifications on this event
//
Status = gBS->RegisterProtocolNotify (
&gEfiSimpleTextInputExProtocolGuid,
mHotkeyEvent,
&mHotkeyRegistration
);
ASSERT_EFI_ERROR (Status);
return Status;
}
|