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UefiCpuPkg: Add multiprocessor library for LoongArch64

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Added LoongArch multiprocessor initialization instance into MpInitLib.

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4734

Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Chao Li <lichao@loongson.cn>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Chao Li
2024-04-12 10:12:06 +08:00
committed by mergify[bot]
parent 392a368533
commit abaf405ed9
6 changed files with 2871 additions and 12 deletions
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480
UefiCpuPkg/Library/MpInitLib/LoongArch64/DxeMpLib.c Normal file
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/** @file
LoongArch64 MP initialize support functions for DXE phase.
Copyright (c) 2024, Loongson Technology Corporation Limited. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "MpLib.h"
#include <Library/DebugAgentLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Protocol/Timer.h>
CPU_MP_DATA *mCpuMpData = NULL;
EFI_EVENT mCheckAllApsEvent = NULL;
volatile BOOLEAN mStopCheckAllApsStatus = TRUE;
/**
Enable Debug Agent to support source debugging on AP function.
**/
VOID
EnableDebugAgent (
VOID
)
{
//
// Initialize Debug Agent to support source level debug in DXE phase
//
InitializeDebugAgent (DEBUG_AGENT_INIT_DXE_AP, NULL, NULL);
}
/**
Get the pointer to CPU MP Data structure.
@return The pointer to CPU MP Data structure.
**/
CPU_MP_DATA *
GetCpuMpData (
VOID
)
{
ASSERT (mCpuMpData != NULL);
return mCpuMpData;
}
/**
Save the pointer to CPU MP Data structure.
@param[in] CpuMpData The pointer to CPU MP Data structure will be saved.
**/
VOID
SaveCpuMpData (
IN CPU_MP_DATA *CpuMpData
)
{
mCpuMpData = CpuMpData;
}
/**
Get available EfiBootServicesCode memory below 4GB by specified size.
This buffer is required to safely transfer AP from real address mode to
protected mode or long mode, due to the fact that the buffer returned by
GetWakeupBuffer() may be marked as non-executable.
@param[in] BufferSize Wakeup transition buffer size.
@retval other Return wakeup transition buffer address below 4GB.
@retval 0 Cannot find free memory below 4GB.
**/
UINTN
GetModeTransitionBuffer (
IN UINTN BufferSize
)
{
return 0;
}
/**
Checks APs status and updates APs status if needed.
**/
VOID
CheckAndUpdateApsStatus (
VOID
)
{
UINTN ProcessorNumber;
EFI_STATUS Status;
CPU_MP_DATA *CpuMpData;
CpuMpData = GetCpuMpData ();
//
// First, check whether pending StartupAllAPs() exists.
//
if (CpuMpData->WaitEvent != NULL) {
Status = CheckAllAPs ();
//
// If all APs finish for StartupAllAPs(), signal the WaitEvent for it.
//
if (Status != EFI_NOT_READY) {
Status = gBS->SignalEvent (CpuMpData->WaitEvent);
CpuMpData->WaitEvent = NULL;
}
}
//
// Second, check whether pending StartupThisAPs() callings exist.
//
for (ProcessorNumber = 0; ProcessorNumber < CpuMpData->CpuCount; ProcessorNumber++) {
if (CpuMpData->CpuData[ProcessorNumber].WaitEvent == NULL) {
continue;
}
Status = CheckThisAP (ProcessorNumber);
if (Status != EFI_NOT_READY) {
gBS->SignalEvent (CpuMpData->CpuData[ProcessorNumber].WaitEvent);
CpuMpData->CpuData[ProcessorNumber].WaitEvent = NULL;
}
}
}
/**
Checks APs' status periodically.
This function is triggered by timer periodically to check the
state of APs for StartupAllAPs() and StartupThisAP() executed
in non-blocking mode.
@param[in] Event Event triggered.
@param[in] Context Parameter passed with the event.
**/
VOID
EFIAPI
CheckApsStatus (
IN EFI_EVENT Event,
IN VOID *Context
)
{
//
// If CheckApsStatus() is not stopped, otherwise return immediately.
//
if (!mStopCheckAllApsStatus) {
CheckAndUpdateApsStatus ();
}
}
/**
Initialize global data for MP support.
@param[in] CpuMpData The pointer to CPU MP Data structure.
**/
VOID
InitMpGlobalData (
IN CPU_MP_DATA *CpuMpData
)
{
EFI_STATUS Status;
SaveCpuMpData (CpuMpData);
Status = gBS->CreateEvent (
EVT_TIMER | EVT_NOTIFY_SIGNAL,
TPL_NOTIFY,
CheckApsStatus,
NULL,
&mCheckAllApsEvent
);
ASSERT_EFI_ERROR (Status);
//
// Set timer to check all APs status.
//
Status = gBS->SetTimer (
mCheckAllApsEvent,
TimerPeriodic,
EFI_TIMER_PERIOD_MICROSECONDS (
PcdGet32 (PcdCpuApStatusCheckIntervalInMicroSeconds)
)
);
ASSERT_EFI_ERROR (Status);
}
/**
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
)
{
EFI_STATUS Status;
//
// Temporarily stop checkAllApsStatus for avoid resource dead-lock.
//
mStopCheckAllApsStatus = TRUE;
Status = StartupAllCPUsWorker (
Procedure,
SingleThread,
TRUE,
WaitEvent,
TimeoutInMicroseconds,
ProcedureArgument,
FailedCpuList
);
//
// Start checkAllApsStatus
//
mStopCheckAllApsStatus = FALSE;
return Status;
}
/**
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
)
{
EFI_STATUS Status;
//
// temporarily stop checkAllApsStatus for avoid resource dead-lock.
//
mStopCheckAllApsStatus = TRUE;
Status = StartupThisAPWorker (
Procedure,
ProcessorNumber,
WaitEvent,
TimeoutInMicroseconds,
ProcedureArgument,
Finished
);
mStopCheckAllApsStatus = FALSE;
return Status;
}
/**
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;
}