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
|
/** @file
Multiple-Processor initialization Library for uniprocessor platforms.
Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Ppi/SecPlatformInformation.h>
#include <Protocol/MpService.h>
#include <Library/DebugLib.h>
#include <Library/LocalApicLib.h>
#include <Library/HobLib.h>
/**
MP Initialize Library initialization.
This service will allocate AP reset vector and wakeup all APs to do APs
initialization.
This service must be invoked before all other MP Initialize Library
service are invoked.
@retval EFI_SUCCESS MP initialization succeeds.
@retval Others MP initialization fails.
**/
EFI_STATUS
EFIAPI
MpInitLibInitialize (
VOID
)
{
//
// Enable the local APIC for Virtual Wire Mode.
//
ProgramVirtualWireMode ();
return EFI_SUCCESS;
}
/**
Retrieves the number of logical processor in the platform and the number of
those logical processors that are enabled on this boot. This service may only
be called from the BSP.
@param[out] NumberOfProcessors Pointer to the total number of logical
processors in the system, including the BSP
and disabled APs.
@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
processors that exist in system, including
the BSP.
@retval EFI_SUCCESS The number of logical processors and enabled
logical processors was retrieved.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL and NumberOfEnabledProcessors
is NULL.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
**/
EFI_STATUS
EFIAPI
MpInitLibGetNumberOfProcessors (
OUT UINTN *NumberOfProcessors, OPTIONAL
OUT UINTN *NumberOfEnabledProcessors OPTIONAL
)
{
*NumberOfProcessors = 1;
*NumberOfEnabledProcessors = 1;
return EFI_SUCCESS;
}
/**
Gets detailed MP-related information on the requested processor at the
instant this call is made. This service may only be called from the BSP.
@param[in] ProcessorNumber The handle number of processor.
@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
the requested processor is deposited.
@param[out] HealthData Return processor health data.
@retval EFI_SUCCESS Processor information was returned.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist in the platform.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
**/
EFI_STATUS
EFIAPI
MpInitLibGetProcessorInfo (
IN UINTN ProcessorNumber,
OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer,
OUT EFI_HEALTH_FLAGS *HealthData OPTIONAL
)
{
EFI_HOB_GUID_TYPE *GuidHob;
EFI_SEC_PLATFORM_INFORMATION_RECORD *SecPlatformInformation;
if (ProcessorInfoBuffer == NULL) {
return EFI_INVALID_PARAMETER;
}
if (ProcessorNumber != 0) {
return EFI_NOT_FOUND;
}
ProcessorInfoBuffer->ProcessorId = 0;
ProcessorInfoBuffer->StatusFlag = PROCESSOR_AS_BSP_BIT |
PROCESSOR_ENABLED_BIT |
PROCESSOR_HEALTH_STATUS_BIT;
ProcessorInfoBuffer->Location.Package = 0;
ProcessorInfoBuffer->Location.Core = 0;
ProcessorInfoBuffer->Location.Thread = 0;
if (HealthData != NULL) {
GuidHob = GetFirstGuidHob (&gEfiSecPlatformInformationPpiGuid);
if (GuidHob != NULL) {
SecPlatformInformation = GET_GUID_HOB_DATA (GuidHob);
HealthData->Uint32 = SecPlatformInformation->IA32HealthFlags.Uint32;
} else {
DEBUG ((DEBUG_INFO, "Does not find any HOB stored CPU BIST information!\n"));
HealthData->Uint32 = 0;
}
}
return EFI_SUCCESS;
}
/**
This service executes a caller provided function on all enabled APs.
@param[in] Procedure A pointer to the function to be run on
enabled APs of the system. See type
EFI_AP_PROCEDURE.
@param[in] SingleThread If TRUE, then all the enabled APs execute
the function specified by Procedure one by
one, in ascending order of processor handle
number. If FALSE, then all the enabled APs
execute the function specified by Procedure
simultaneously.
@param[in] WaitEvent The event created by the caller with CreateEvent()
service. If it is NULL, then execute in
blocking mode. BSP waits until all APs finish
or TimeoutInMicroSeconds expires. If it's
not NULL, then execute in non-blocking mode.
BSP requests the function specified by
Procedure to be started on all the enabled
APs, and go on executing immediately. If
all return from Procedure, or TimeoutInMicroSeconds
expires, this event is signaled. The BSP
can use the CheckEvent() or WaitForEvent()
services to check the state of event. Type
EFI_EVENT is defined in CreateEvent() in
the Unified Extensible Firmware Interface
Specification.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
APs to return from Procedure, either for
blocking or non-blocking mode. Zero means
infinity. If the timeout expires before
all APs return from Procedure, then Procedure
on the failed APs is terminated. All enabled
APs are available for next function assigned
by MpInitLibStartupAllAPs() or
MPInitLibStartupThisAP().
If the timeout expires in blocking mode,
BSP returns EFI_TIMEOUT. If the timeout
expires in non-blocking mode, WaitEvent
is signaled with SignalEvent().
@param[in] ProcedureArgument The parameter passed into Procedure for
all APs.
@param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
if all APs finish successfully, then its
content is set to NULL. If not all APs
finish before timeout expires, then its
content is set to address of the buffer
holding handle numbers of the failed APs.
The buffer is allocated by MP Initialization
library, and it's the caller's responsibility to
free the buffer with FreePool() service.
In blocking mode, it is ready for consumption
when the call returns. In non-blocking mode,
it is ready when WaitEvent is signaled. The
list of failed CPU is terminated by
END_OF_CPU_LIST.
@retval EFI_SUCCESS In blocking mode, all APs have finished before
the timeout expired.
@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
to all enabled APs.
@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
signaled.
@retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not
supported.
@retval EFI_DEVICE_ERROR Caller processor is AP.
@retval EFI_NOT_STARTED No enabled APs exist in the system.
@retval EFI_NOT_READY Any enabled APs are busy.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
@retval EFI_TIMEOUT In blocking mode, the timeout expired before
all enabled APs have finished.
@retval EFI_INVALID_PARAMETER Procedure is NULL.
**/
EFI_STATUS
EFIAPI
MpInitLibStartupAllAPs (
IN EFI_AP_PROCEDURE Procedure,
IN BOOLEAN SingleThread,
IN EFI_EVENT WaitEvent OPTIONAL,
IN UINTN TimeoutInMicroseconds,
IN VOID *ProcedureArgument OPTIONAL,
OUT UINTN **FailedCpuList OPTIONAL
)
{
return EFI_NOT_STARTED;
}
/**
This service lets the caller get one enabled AP to execute a caller-provided
function.
@param[in] Procedure A pointer to the function to be run on the
designated AP of the system. See type
EFI_AP_PROCEDURE.
@param[in] ProcessorNumber The handle number of the AP. The range is
from 0 to the total number of logical
processors minus 1. The total number of
logical processors can be retrieved by
MpInitLibGetNumberOfProcessors().
@param[in] WaitEvent The event created by the caller with CreateEvent()
service. If it is NULL, then execute in
blocking mode. BSP waits until this AP finish
or TimeoutInMicroSeconds expires. If it's
not NULL, then execute in non-blocking mode.
BSP requests the function specified by
Procedure to be started on this AP,
and go on executing immediately. If this AP
return from Procedure or TimeoutInMicroSeconds
expires, this event is signaled. The BSP
can use the CheckEvent() or WaitForEvent()
services to check the state of event. Type
EFI_EVENT is defined in CreateEvent() in
the Unified Extensible Firmware Interface
Specification.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
this AP to finish this Procedure, either for
blocking or non-blocking mode. Zero means
infinity. If the timeout expires before
this AP returns from Procedure, then Procedure
on the AP is terminated. The
AP is available for next function assigned
by MpInitLibStartupAllAPs() or
MpInitLibStartupThisAP().
If the timeout expires in blocking mode,
BSP returns EFI_TIMEOUT. If the timeout
expires in non-blocking mode, WaitEvent
is signaled with SignalEvent().
@param[in] ProcedureArgument The parameter passed into Procedure on the
specified AP.
@param[out] Finished If NULL, this parameter is ignored. In
blocking mode, this parameter is ignored.
In non-blocking mode, if AP returns from
Procedure before the timeout expires, its
content is set to TRUE. Otherwise, the
value is set to FALSE. The caller can
determine if the AP returned from Procedure
by evaluating this value.
@retval EFI_SUCCESS In blocking mode, specified AP finished before
the timeout expires.
@retval EFI_SUCCESS In non-blocking mode, the function has been
dispatched to specified AP.
@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
signaled.
@retval EFI_UNSUPPORTED WaitEvent is not NULL if non-blocking mode is not
supported.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_TIMEOUT In blocking mode, the timeout expired before
the specified AP has finished.
@retval EFI_NOT_READY The specified AP is busy.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
@retval EFI_INVALID_PARAMETER Procedure is NULL.
**/
EFI_STATUS
EFIAPI
MpInitLibStartupThisAP (
IN EFI_AP_PROCEDURE Procedure,
IN UINTN ProcessorNumber,
IN EFI_EVENT WaitEvent OPTIONAL,
IN UINTN TimeoutInMicroseconds,
IN VOID *ProcedureArgument OPTIONAL,
OUT BOOLEAN *Finished OPTIONAL
)
{
return EFI_INVALID_PARAMETER;
}
/**
This service switches the requested AP to be the BSP from that point onward.
This service changes the BSP for all purposes. This call can only be performed
by the current BSP.
@param[in] ProcessorNumber The handle number of AP that is to become the new
BSP. The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
MpInitLibGetNumberOfProcessors().
@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
enabled AP. Otherwise, it will be disabled.
@retval EFI_SUCCESS BSP successfully switched.
@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
this service returning.
@retval EFI_UNSUPPORTED Switching the BSP is not supported.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_NOT_FOUND The processor with the handle specified by
ProcessorNumber does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
a disabled AP.
@retval EFI_NOT_READY The specified AP is busy.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
**/
EFI_STATUS
EFIAPI
MpInitLibSwitchBSP (
IN UINTN ProcessorNumber,
IN BOOLEAN EnableOldBSP
)
{
return EFI_UNSUPPORTED;
}
/**
This service lets the caller enable or disable an AP from this point onward.
This service may only be called from the BSP.
@param[in] ProcessorNumber The handle number of AP.
The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
MpInitLibGetNumberOfProcessors().
@param[in] EnableAP Specifies the new state for the processor for
enabled, FALSE for disabled.
@param[in] HealthFlag If not NULL, a pointer to a value that specifies
the new health status of the AP. This flag
corresponds to StatusFlag defined in
EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
the PROCESSOR_HEALTH_STATUS_BIT is used. All other
bits are ignored. If it is NULL, this parameter
is ignored.
@retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
@retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
prior to this service returning.
@retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
@retval EFI_DEVICE_ERROR The calling processor is an AP.
@retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
does not exist.
@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
**/
EFI_STATUS
EFIAPI
MpInitLibEnableDisableAP (
IN UINTN ProcessorNumber,
IN BOOLEAN EnableAP,
IN UINT32 *HealthFlag OPTIONAL
)
{
return EFI_UNSUPPORTED;
}
/**
This return the handle number for the calling processor. This service may be
called from the BSP and APs.
@param[out] ProcessorNumber Pointer to the handle number of AP.
The range is from 0 to the total number of
logical processors minus 1. The total number of
logical processors can be retrieved by
MpInitLibGetNumberOfProcessors().
@retval EFI_SUCCESS The current processor handle number was returned
in ProcessorNumber.
@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
@retval EFI_NOT_READY MP Initialize Library is not initialized.
**/
EFI_STATUS
EFIAPI
MpInitLibWhoAmI (
OUT UINTN *ProcessorNumber
)
{
if (ProcessorNumber == NULL) {
return EFI_INVALID_PARAMETER;
}
*ProcessorNumber = 0;
return EFI_SUCCESS;
}
/**
This service executes a caller provided function on all enabled CPUs.
@param[in] Procedure A pointer to the function to be run on
enabled APs of the system. See type
EFI_AP_PROCEDURE.
@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
APs to return from Procedure, either for
blocking or non-blocking mode. Zero means
infinity. TimeoutInMicroseconds is ignored
for BSP.
@param[in] ProcedureArgument The parameter passed into Procedure for
all APs.
@retval EFI_SUCCESS CPU have finished the procedure.
@retval EFI_INVALID_PARAMETER Procedure is NULL.
**/
EFI_STATUS
EFIAPI
MpInitLibStartupAllCPUs (
IN EFI_AP_PROCEDURE Procedure,
IN UINTN TimeoutInMicroseconds,
IN VOID *ProcedureArgument OPTIONAL
)
{
if (Procedure == NULL) {
return EFI_INVALID_PARAMETER;
}
Procedure (ProcedureArgument);
return EFI_SUCCESS;
}
|