CpuMp.c@ 108794

Last change on this file since 108794 was 105670, checked in by vboxsync, 8 months ago
Devices/EFI/FirmwareNew: Merge edk2-stable-202405 and make it build on aarch64, bugref:4643
Property svn:eol-style set to `native`
File size: 27.4 KB

Line
1	/** @file
2	CPU DXE Module to produce CPU MP Protocol.
3
4	Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
5
6	SPDX-License-Identifier: BSD-2-Clause-Patent
7	**/
8
9	#include "CpuDxe.h"
10	#include "CpuMp.h"
11
12	EFI_HANDLE mMpServiceHandle = NULL;
13	UINTN mNumberOfProcessors = 1;
14
15	EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
16	GetNumberOfProcessors,
17	GetProcessorInfo,
18	StartupAllAPs,
19	StartupThisAP,
20	SwitchBSP,
21	EnableDisableAP,
22	WhoAmI
23	};
24
25	/**
26	This service retrieves the number of logical processor in the platform
27	and the number of those logical processors that are enabled on this boot.
28	This service may only be called from the BSP.
29
30	This function is used to retrieve the following information:
31	- The number of logical processors that are present in the system.
32	- The number of enabled logical processors in the system at the instant
33	this call is made.
34
35	Because MP Service Protocol provides services to enable and disable processors
36	dynamically, the number of enabled logical processors may vary during the
37	course of a boot session.
38
39	If this service is called from an AP, then EFI_DEVICE_ERROR is returned.
40	If NumberOfProcessors or NumberOfEnabledProcessors is NULL, then
41	EFI_INVALID_PARAMETER is returned. Otherwise, the total number of processors
42	is returned in NumberOfProcessors, the number of currently enabled processor
43	is returned in NumberOfEnabledProcessors, and EFI_SUCCESS is returned.
44
45	@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
46	instance.
47	@param[out] NumberOfProcessors Pointer to the total number of logical
48	processors in the system, including the BSP
49	and disabled APs.
50	@param[out] NumberOfEnabledProcessors Pointer to the number of enabled logical
51	processors that exist in system, including
52	the BSP.
53
54	@retval EFI_SUCCESS The number of logical processors and enabled
55	logical processors was retrieved.
56	@retval EFI_DEVICE_ERROR The calling processor is an AP.
57	@retval EFI_INVALID_PARAMETER NumberOfProcessors is NULL.
58	@retval EFI_INVALID_PARAMETER NumberOfEnabledProcessors is NULL.
59
60	**/
61	EFI_STATUS
62	EFIAPI
63	GetNumberOfProcessors (
64	IN EFI_MP_SERVICES_PROTOCOL *This,
65	OUT UINTN *NumberOfProcessors,
66	OUT UINTN *NumberOfEnabledProcessors
67	)
68	{
69	if ((NumberOfProcessors == NULL) \|\| (NumberOfEnabledProcessors == NULL)) {
70	return EFI_INVALID_PARAMETER;
71	}
72
73	return MpInitLibGetNumberOfProcessors (
74	NumberOfProcessors,
75	NumberOfEnabledProcessors
76	);
77	}
78
79	/**
80	Gets detailed MP-related information on the requested processor at the
81	instant this call is made. This service may only be called from the BSP.
82
83	This service retrieves detailed MP-related information about any processor
84	on the platform. Note the following:
85	- The processor information may change during the course of a boot session.
86	- The information presented here is entirely MP related.
87
88	Information regarding the number of caches and their sizes, frequency of operation,
89	slot numbers is all considered platform-related information and is not provided
90	by this service.
91
92	@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
93	instance.
94	@param[in] ProcessorNumber The handle number of processor.
95	@param[out] ProcessorInfoBuffer A pointer to the buffer where information for
96	the requested processor is deposited.
97
98	@retval EFI_SUCCESS Processor information was returned.
99	@retval EFI_DEVICE_ERROR The calling processor is an AP.
100	@retval EFI_INVALID_PARAMETER ProcessorInfoBuffer is NULL.
101	@retval EFI_NOT_FOUND The processor with the handle specified by
102	ProcessorNumber does not exist in the platform.
103
104	**/
105	EFI_STATUS
106	EFIAPI
107	GetProcessorInfo (
108	IN EFI_MP_SERVICES_PROTOCOL *This,
109	IN UINTN ProcessorNumber,
110	OUT EFI_PROCESSOR_INFORMATION *ProcessorInfoBuffer
111	)
112	{
113	return MpInitLibGetProcessorInfo (ProcessorNumber, ProcessorInfoBuffer, NULL);
114	}
115
116	/**
117	This service executes a caller provided function on all enabled APs. APs can
118	run either simultaneously or one at a time in sequence. This service supports
119	both blocking and non-blocking requests. The non-blocking requests use EFI
120	events so the BSP can detect when the APs have finished. This service may only
121	be called from the BSP.
122
123	This function is used to dispatch all the enabled APs to the function specified
124	by Procedure. If any enabled AP is busy, then EFI_NOT_READY is returned
125	immediately and Procedure is not started on any AP.
126
127	If SingleThread is TRUE, all the enabled APs execute the function specified by
128	Procedure one by one, in ascending order of processor handle number. Otherwise,
129	all the enabled APs execute the function specified by Procedure simultaneously.
130
131	If WaitEvent is NULL, execution is in blocking mode. The BSP waits until all
132	APs finish or TimeoutInMicroseconds expires. Otherwise, execution is in non-blocking
133	mode, and the BSP returns from this service without waiting for APs. If a
134	non-blocking mode is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
135	is signaled, then EFI_UNSUPPORTED must be returned.
136
137	If the timeout specified by TimeoutInMicroseconds expires before all APs return
138	from Procedure, then Procedure on the failed APs is terminated. All enabled APs
139	are always available for further calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
140	and EFI_MP_SERVICES_PROTOCOL.StartupThisAP(). If FailedCpuList is not NULL, its
141	content points to the list of processor handle numbers in which Procedure was
142	terminated.
143
144	Note: It is the responsibility of the consumer of the EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
145	to make sure that the nature of the code that is executed on the BSP and the
146	dispatched APs is well controlled. The MP Services Protocol does not guarantee
147	that the Procedure function is MP-safe. Hence, the tasks that can be run in
148	parallel are limited to certain independent tasks and well-controlled exclusive
149	code. EFI services and protocols may not be called by APs unless otherwise
150	specified.
151
152	In blocking execution mode, BSP waits until all APs finish or
153	TimeoutInMicroseconds expires.
154
155	In non-blocking execution mode, BSP is freed to return to the caller and then
156	proceed to the next task without having to wait for APs. The following
157	sequence needs to occur in a non-blocking execution mode:
158
159	-# The caller that intends to use this MP Services Protocol in non-blocking
160	mode creates WaitEvent by calling the EFI CreateEvent() service. The caller
161	invokes EFI_MP_SERVICES_PROTOCOL.StartupAllAPs(). If the parameter WaitEvent
162	is not NULL, then StartupAllAPs() executes in non-blocking mode. It requests
163	the function specified by Procedure to be started on all the enabled APs,
164	and releases the BSP to continue with other tasks.
165	-# The caller can use the CheckEvent() and WaitForEvent() services to check
166	the state of the WaitEvent created in step 1.
167	-# When the APs complete their task or TimeoutInMicroSecondss expires, the MP
168	Service signals WaitEvent by calling the EFI SignalEvent() function. If
169	FailedCpuList is not NULL, its content is available when WaitEvent is
170	signaled. If all APs returned from Procedure prior to the timeout, then
171	FailedCpuList is set to NULL. If not all APs return from Procedure before
172	the timeout, then FailedCpuList is filled in with the list of the failed
173	APs. The buffer is allocated by MP Service Protocol using AllocatePool().
174	It is the caller's responsibility to free the buffer with FreePool() service.
175	-# This invocation of SignalEvent() function informs the caller that invoked
176	EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() that either all the APs completed
177	the specified task or a timeout occurred. The contents of FailedCpuList
178	can be examined to determine which APs did not complete the specified task
179	prior to the timeout.
180
181	@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
182	instance.
183	@param[in] Procedure A pointer to the function to be run on
184	enabled APs of the system. See type
185	EFI_AP_PROCEDURE.
186	@param[in] SingleThread If TRUE, then all the enabled APs execute
187	the function specified by Procedure one by
188	one, in ascending order of processor handle
189	number. If FALSE, then all the enabled APs
190	execute the function specified by Procedure
191	simultaneously.
192	@param[in] WaitEvent The event created by the caller with CreateEvent()
193	service. If it is NULL, then execute in
194	blocking mode. BSP waits until all APs finish
195	or TimeoutInMicroseconds expires. If it's
196	not NULL, then execute in non-blocking mode.
197	BSP requests the function specified by
198	Procedure to be started on all the enabled
199	APs, and go on executing immediately. If
200	all return from Procedure, or TimeoutInMicroseconds
201	expires, this event is signaled. The BSP
202	can use the CheckEvent() or WaitForEvent()
203	services to check the state of event. Type
204	EFI_EVENT is defined in CreateEvent() in
205	the Unified Extensible Firmware Interface
206	Specification.
207	@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
208	APs to return from Procedure, either for
209	blocking or non-blocking mode. Zero means
210	infinity. If the timeout expires before
211	all APs return from Procedure, then Procedure
212	on the failed APs is terminated. All enabled
213	APs are available for next function assigned
214	by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
215	or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
216	If the timeout expires in blocking mode,
217	BSP returns EFI_TIMEOUT. If the timeout
218	expires in non-blocking mode, WaitEvent
219	is signaled with SignalEvent().
220	@param[in] ProcedureArgument The parameter passed into Procedure for
221	all APs.
222	@param[out] FailedCpuList If NULL, this parameter is ignored. Otherwise,
223	if all APs finish successfully, then its
224	content is set to NULL. If not all APs
225	finish before timeout expires, then its
226	content is set to address of the buffer
227	holding handle numbers of the failed APs.
228	The buffer is allocated by MP Service Protocol,
229	and it's the caller's responsibility to
230	free the buffer with FreePool() service.
231	In blocking mode, it is ready for consumption
232	when the call returns. In non-blocking mode,
233	it is ready when WaitEvent is signaled. The
234	list of failed CPU is terminated by
235	END_OF_CPU_LIST.
236
237	@retval EFI_SUCCESS In blocking mode, all APs have finished before
238	the timeout expired.
239	@retval EFI_SUCCESS In non-blocking mode, function has been dispatched
240	to all enabled APs.
241	@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
242	UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
243	signaled.
244	@retval EFI_DEVICE_ERROR Caller processor is AP.
245	@retval EFI_NOT_STARTED No enabled APs exist in the system.
246	@retval EFI_NOT_READY Any enabled APs are busy.
247	@retval EFI_TIMEOUT In blocking mode, the timeout expired before
248	all enabled APs have finished.
249	@retval EFI_INVALID_PARAMETER Procedure is NULL.
250
251	**/
252	EFI_STATUS
253	EFIAPI
254	StartupAllAPs (
255	IN EFI_MP_SERVICES_PROTOCOL *This,
256	IN EFI_AP_PROCEDURE Procedure,
257	IN BOOLEAN SingleThread,
258	IN EFI_EVENT WaitEvent OPTIONAL,
259	IN UINTN TimeoutInMicroseconds,
260	IN VOID *ProcedureArgument OPTIONAL,
261	OUT UINTN **FailedCpuList OPTIONAL
262	)
263	{
264	return MpInitLibStartupAllAPs (
265	Procedure,
266	SingleThread,
267	WaitEvent,
268	TimeoutInMicroseconds,
269	ProcedureArgument,
270	FailedCpuList
271	);
272	}
273
274	/**
275	This service lets the caller get one enabled AP to execute a caller-provided
276	function. The caller can request the BSP to either wait for the completion
277	of the AP or just proceed with the next task by using the EFI event mechanism.
278	See EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() for more details on non-blocking
279	execution support. This service may only be called from the BSP.
280
281	This function is used to dispatch one enabled AP to the function specified by
282	Procedure passing in the argument specified by ProcedureArgument. If WaitEvent
283	is NULL, execution is in blocking mode. The BSP waits until the AP finishes or
284	TimeoutInMicroSecondss expires. Otherwise, execution is in non-blocking mode.
285	BSP proceeds to the next task without waiting for the AP. If a non-blocking mode
286	is requested after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled,
287	then EFI_UNSUPPORTED must be returned.
288
289	If the timeout specified by TimeoutInMicroseconds expires before the AP returns
290	from Procedure, then execution of Procedure by the AP is terminated. The AP is
291	available for subsequent calls to EFI_MP_SERVICES_PROTOCOL.StartupAllAPs() and
292	EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
293
294	@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL
295	instance.
296	@param[in] Procedure A pointer to the function to be run on the
297	designated AP of the system. See type
298	EFI_AP_PROCEDURE.
299	@param[in] ProcessorNumber The handle number of the AP. The range is
300	from 0 to the total number of logical
301	processors minus 1. The total number of
302	logical processors can be retrieved by
303	EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
304	@param[in] WaitEvent The event created by the caller with CreateEvent()
305	service. If it is NULL, then execute in
306	blocking mode. BSP waits until this AP finish
307	or TimeoutInMicroSeconds expires. If it's
308	not NULL, then execute in non-blocking mode.
309	BSP requests the function specified by
310	Procedure to be started on this AP,
311	and go on executing immediately. If this AP
312	return from Procedure or TimeoutInMicroSeconds
313	expires, this event is signaled. The BSP
314	can use the CheckEvent() or WaitForEvent()
315	services to check the state of event. Type
316	EFI_EVENT is defined in CreateEvent() in
317	the Unified Extensible Firmware Interface
318	Specification.
319	@param[in] TimeoutInMicroseconds Indicates the time limit in microseconds for
320	this AP to finish this Procedure, either for
321	blocking or non-blocking mode. Zero means
322	infinity. If the timeout expires before
323	this AP returns from Procedure, then Procedure
324	on the AP is terminated. The
325	AP is available for next function assigned
326	by EFI_MP_SERVICES_PROTOCOL.StartupAllAPs()
327	or EFI_MP_SERVICES_PROTOCOL.StartupThisAP().
328	If the timeout expires in blocking mode,
329	BSP returns EFI_TIMEOUT. If the timeout
330	expires in non-blocking mode, WaitEvent
331	is signaled with SignalEvent().
332	@param[in] ProcedureArgument The parameter passed into Procedure on the
333	specified AP.
334	@param[out] Finished If NULL, this parameter is ignored. In
335	blocking mode, this parameter is ignored.
336	In non-blocking mode, if AP returns from
337	Procedure before the timeout expires, its
338	content is set to TRUE. Otherwise, the
339	value is set to FALSE. The caller can
340	determine if the AP returned from Procedure
341	by evaluating this value.
342
343	@retval EFI_SUCCESS In blocking mode, specified AP finished before
344	the timeout expires.
345	@retval EFI_SUCCESS In non-blocking mode, the function has been
346	dispatched to specified AP.
347	@retval EFI_UNSUPPORTED A non-blocking mode request was made after the
348	UEFI event EFI_EVENT_GROUP_READY_TO_BOOT was
349	signaled.
350	@retval EFI_DEVICE_ERROR The calling processor is an AP.
351	@retval EFI_TIMEOUT In blocking mode, the timeout expired before
352	the specified AP has finished.
353	@retval EFI_NOT_READY The specified AP is busy.
354	@retval EFI_NOT_FOUND The processor with the handle specified by
355	ProcessorNumber does not exist.
356	@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP or disabled AP.
357	@retval EFI_INVALID_PARAMETER Procedure is NULL.
358
359	**/
360	EFI_STATUS
361	EFIAPI
362	StartupThisAP (
363	IN EFI_MP_SERVICES_PROTOCOL *This,
364	IN EFI_AP_PROCEDURE Procedure,
365	IN UINTN ProcessorNumber,
366	IN EFI_EVENT WaitEvent OPTIONAL,
367	IN UINTN TimeoutInMicroseconds,
368	IN VOID *ProcedureArgument OPTIONAL,
369	OUT BOOLEAN *Finished OPTIONAL
370	)
371	{
372	return MpInitLibStartupThisAP (
373	Procedure,
374	ProcessorNumber,
375	WaitEvent,
376	TimeoutInMicroseconds,
377	ProcedureArgument,
378	Finished
379	);
380	}
381
382	/**
383	This service switches the requested AP to be the BSP from that point onward.
384	This service changes the BSP for all purposes. This call can only be performed
385	by the current BSP.
386
387	This service switches the requested AP to be the BSP from that point onward.
388	This service changes the BSP for all purposes. The new BSP can take over the
389	execution of the old BSP and continue seamlessly from where the old one left
390	off. This service may not be supported after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT
391	is signaled.
392
393	If the BSP cannot be switched prior to the return from this service, then
394	EFI_UNSUPPORTED must be returned.
395
396	@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
397	@param[in] ProcessorNumber The handle number of AP that is to become the new
398	BSP. The range is from 0 to the total number of
399	logical processors minus 1. The total number of
400	logical processors can be retrieved by
401	EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
402	@param[in] EnableOldBSP If TRUE, then the old BSP will be listed as an
403	enabled AP. Otherwise, it will be disabled.
404
405	@retval EFI_SUCCESS BSP successfully switched.
406	@retval EFI_UNSUPPORTED Switching the BSP cannot be completed prior to
407	this service returning.
408	@retval EFI_UNSUPPORTED Switching the BSP is not supported.
409	@retval EFI_DEVICE_ERROR The calling processor is an AP.
410	@retval EFI_NOT_FOUND The processor with the handle specified by
411	ProcessorNumber does not exist.
412	@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the current BSP or
413	a disabled AP.
414	@retval EFI_NOT_READY The specified AP is busy.
415
416	**/
417	EFI_STATUS
418	EFIAPI
419	SwitchBSP (
420	IN EFI_MP_SERVICES_PROTOCOL *This,
421	IN UINTN ProcessorNumber,
422	IN BOOLEAN EnableOldBSP
423	)
424	{
425	return MpInitLibSwitchBSP (ProcessorNumber, EnableOldBSP);
426	}
427
428	/**
429	This service lets the caller enable or disable an AP from this point onward.
430	This service may only be called from the BSP.
431
432	This service allows the caller enable or disable an AP from this point onward.
433	The caller can optionally specify the health status of the AP by Health. If
434	an AP is being disabled, then the state of the disabled AP is implementation
435	dependent. If an AP is enabled, then the implementation must guarantee that a
436	complete initialization sequence is performed on the AP, so the AP is in a state
437	that is compatible with an MP operating system. This service may not be supported
438	after the UEFI Event EFI_EVENT_GROUP_READY_TO_BOOT is signaled.
439
440	If the enable or disable AP operation cannot be completed prior to the return
441	from this service, then EFI_UNSUPPORTED must be returned.
442
443	@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
444	@param[in] ProcessorNumber The handle number of AP.
445	The range is from 0 to the total number of
446	logical processors minus 1. The total number of
447	logical processors can be retrieved by
448	EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
449	@param[in] EnableAP Specifies the new state for the processor for
450	enabled, FALSE for disabled.
451	@param[in] HealthFlag If not NULL, a pointer to a value that specifies
452	the new health status of the AP. This flag
453	corresponds to StatusFlag defined in
454	EFI_MP_SERVICES_PROTOCOL.GetProcessorInfo(). Only
455	the PROCESSOR_HEALTH_STATUS_BIT is used. All other
456	bits are ignored. If it is NULL, this parameter
457	is ignored.
458
459	@retval EFI_SUCCESS The specified AP was enabled or disabled successfully.
460	@retval EFI_UNSUPPORTED Enabling or disabling an AP cannot be completed
461	prior to this service returning.
462	@retval EFI_UNSUPPORTED Enabling or disabling an AP is not supported.
463	@retval EFI_DEVICE_ERROR The calling processor is an AP.
464	@retval EFI_NOT_FOUND Processor with the handle specified by ProcessorNumber
465	does not exist.
466	@retval EFI_INVALID_PARAMETER ProcessorNumber specifies the BSP.
467
468	**/
469	EFI_STATUS
470	EFIAPI
471	EnableDisableAP (
472	IN EFI_MP_SERVICES_PROTOCOL *This,
473	IN UINTN ProcessorNumber,
474	IN BOOLEAN EnableAP,
475	IN UINT32 *HealthFlag OPTIONAL
476	)
477	{
478	return MpInitLibEnableDisableAP (ProcessorNumber, EnableAP, HealthFlag);
479	}
480
481	/**
482	This return the handle number for the calling processor. This service may be
483	called from the BSP and APs.
484
485	This service returns the processor handle number for the calling processor.
486	The returned value is in the range from 0 to the total number of logical
487	processors minus 1. The total number of logical processors can be retrieved
488	with EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors(). This service may be
489	called from the BSP and APs. If ProcessorNumber is NULL, then EFI_INVALID_PARAMETER
490	is returned. Otherwise, the current processors handle number is returned in
491	ProcessorNumber, and EFI_SUCCESS is returned.
492
493	@param[in] This A pointer to the EFI_MP_SERVICES_PROTOCOL instance.
494	@param[out] ProcessorNumber Pointer to the handle number of AP.
495	The range is from 0 to the total number of
496	logical processors minus 1. The total number of
497	logical processors can be retrieved by
498	EFI_MP_SERVICES_PROTOCOL.GetNumberOfProcessors().
499
500	@retval EFI_SUCCESS The current processor handle number was returned
501	in ProcessorNumber.
502	@retval EFI_INVALID_PARAMETER ProcessorNumber is NULL.
503
504	**/
505	EFI_STATUS
506	EFIAPI
507	WhoAmI (
508	IN EFI_MP_SERVICES_PROTOCOL *This,
509	OUT UINTN *ProcessorNumber
510	)
511	{
512	return MpInitLibWhoAmI (ProcessorNumber);
513	}
514
515	/**
516	Initialize Multi-processor support.
517	**/
518	VOID
519	InitializeMpSupport (
520	VOID
521	)
522	{
523	EFI_STATUS Status;
524	UINTN NumberOfProcessors;
525	UINTN NumberOfEnabledProcessors;
526
527	//
528	// Wakeup APs to do initialization
529	//
530	Status = MpInitLibInitialize ();
531	ASSERT_EFI_ERROR (Status);
532
533	MpInitLibGetNumberOfProcessors (&NumberOfProcessors, &NumberOfEnabledProcessors);
534	mNumberOfProcessors = NumberOfProcessors;
535	DEBUG ((DEBUG_INFO, "Detect CPU count: %d\n", mNumberOfProcessors));
536
537	Status = gBS->InstallMultipleProtocolInterfaces (
538	&mMpServiceHandle,
539	&gEfiMpServiceProtocolGuid,
540	&mMpServicesTemplate,
541	NULL
542	);
543	ASSERT_EFI_ERROR (Status);
544	}

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source: vbox/trunk/src/VBox/Devices/EFI/FirmwareNew/UefiCpuPkg/CpuDxe/LoongArch64/CpuMp.c@ 108794

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