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UefiCpuPkg/CpuDxe: introduce ResetApStackless() 

If timeout expires before AP returns from Procedure, the AP should
be terminated, we introduce ResetApStackLess() to send init IPI
to let AP exit Procedurce and re-available.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16366 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Chen Fan 2014-11-13 18:29:13 +00:00 committed by jljusten
parent fe078dd57f
commit ac9dbb3b03
3 changed files with 63 additions and 5 deletions
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17
UefiCpuPkg/CpuDxe/ApStartup.c
View File

@ -328,3 +328,20 @@ StartApsStackless (
return EFI_SUCCESS;
}
/**
Resets the Application Processor and directs it to jump to the
specified routine.
The processor jumps to this code in flat mode, but the processor's
stack is not initialized.
@param ProcessorId the AP of ProcessorId was reset
**/
VOID
ResetApStackless (
IN UINT32 ProcessorId
)
{
SendInitSipiSipi (ProcessorId,
(UINT32)(UINTN)(VOID*) StartupCode);
}

26
UefiCpuPkg/CpuDxe/CpuMp.c
View File

@ -25,6 +25,7 @@ VOID *mCommonStack = 0;
VOID *mTopOfApCommonStack = 0;
VOID *mApStackStart = 0;
BOOLEAN mAPsAlreadyInitFinished = FALSE;
volatile BOOLEAN mStopCheckAllAPsStatus = TRUE;
EFI_MP_SERVICES_PROTOCOL mMpServicesTemplate = {
@ -1112,6 +1113,7 @@ ResetProcessorToIdleState (
IN CPU_DATA_BLOCK *CpuData
)
{
ResetApStackless ((UINT32)CpuData->Info.ProcessorId);
}
/**
@ -1138,6 +1140,14 @@ ProcessorToIdleState (
AsmApDoneWithCommonStack ();
//
// Avoid forcibly reset AP caused the AP State is not updated.
//
GetMpSpinLock (CpuData);
CpuData->State = CpuStateIdle;
CpuData->Procedure = NULL;
ReleaseMpSpinLock (CpuData);
while (TRUE) {
GetMpSpinLock (CpuData);
ProcedureArgument = CpuData->Parameter;
@ -1320,12 +1330,26 @@ ApEntryPointInC (
)
{
VOID* TopOfApStack;
UINTN ProcessorNumber;
if (!mAPsAlreadyInitFinished) {
FillInProcessorInformation (FALSE, mMpSystemData.NumberOfProcessors);
TopOfApStack = (UINT8*)mApStackStart + gApStackSize;
mApStackStart = TopOfApStack;
//
// Store the Stack address, when reset the AP, We can found the original address.
//
mMpSystemData.CpuDatas[mMpSystemData.NumberOfProcessors].TopOfStack = TopOfApStack;
mMpSystemData.NumberOfProcessors++;
mMpSystemData.NumberOfEnabledProcessors++;
} else {
WhoAmI (&mMpServicesTemplate, &ProcessorNumber);
//
// Get the original stack address.
//
TopOfApStack = mMpSystemData.CpuDatas[ProcessorNumber].TopOfStack;
}
SwitchStack (
(SWITCH_STACK_ENTRY_POINT)(UINTN)ProcessorToIdleState,
@ -1462,6 +1486,8 @@ InitializeMpSupport (
return;
}
mAPsAlreadyInitFinished = TRUE;
if (mMpSystemData.NumberOfProcessors < gMaxLogicalProcessorNumber) {
FreePages (mApStackStart, EFI_SIZE_TO_PAGES (
(gMaxLogicalProcessorNumber - mMpSystemData.NumberOfProcessors) *

15
UefiCpuPkg/CpuDxe/CpuMp.h
View File

@ -99,6 +99,7 @@ typedef struct {
EFI_EVENT WaitEvent;
BOOLEAN TimeoutActive;
EFI_EVENT CheckThisAPEvent;
VOID *TopOfStack;
} CPU_DATA_BLOCK;
/**
@ -622,5 +623,19 @@ FreeApStartupCode (
VOID
);
/**
Resets the Application Processor and directs it to jump to the
specified routine.
The processor jumps to this code in flat mode, but the processor's
stack is not initialized.
@param ProcessorId the AP of ProcessorId was reset
**/
VOID
ResetApStackless (
IN UINT32 ProcessorId
);
#endif // _CPU_MP_H_