sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UefiCpuPkg/CpuMpPei: Wake up APs by proper method

Browse Source 
If ApLoopMode is ApInHltLoop, BSP will send INIT-SIPI-SIPI to wake up APs.
If ApLoopMode is ApInMwaitLoop or ApInRunLoop, BSP will write one semaphore to
wake up APs.

Contributed-under: TianoCore Contribution Agreement 1.0
Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@19346 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Jeff Fan
2015-12-18 03:26:03 +00:00
committed by vanjeff
parent c87e41b445
commit a09647f3fe
4 changed files with 42 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

43
UefiCpuPkg/CpuMpPei/CpuMpPei.c
View File

@@ -399,7 +399,7 @@ ApCFunction (
@param PeiCpuMpData Pointer to PEI CPU MP Data
@param Broadcast TRUE: Send broadcast IPI to all APs
FALSE: Send IPI to AP by ApicId
@param ApicId Apic ID for the processor to be waked
@param ProcessorNumber The handle number of specified processor
@param Procedure The function to be invoked by AP
@param ProcedureArgument The argument to be passed into AP function
**/
@@ -407,12 +407,13 @@ VOID
WakeUpAP (
IN PEI_CPU_MP_DATA *PeiCpuMpData,
IN BOOLEAN Broadcast,
IN UINT32 ApicId,
IN UINTN ProcessorNumber,
IN EFI_AP_PROCEDURE Procedure, OPTIONAL
IN VOID *ProcedureArgument OPTIONAL
)
{
volatile MP_CPU_EXCHANGE_INFO *ExchangeInfo;
UINTN Index;
PeiCpuMpData->ApFunction = (UINTN) Procedure;
PeiCpuMpData->ApFunctionArgument = (UINTN) ProcedureArgument;
@@ -436,12 +437,40 @@ WakeUpAP (
CopyMem ((VOID *)&ExchangeInfo->GdtrProfile, &mGdt, sizeof(mGdt));
AsmReadIdtr ((IA32_DESCRIPTOR *) &ExchangeInfo->IdtrProfile);
if (Broadcast) {
SendInitSipiSipiAllExcludingSelf ((UINT32) ExchangeInfo->BufferStart);
} else {
SendInitSipiSipi (ApicId, (UINT32) ExchangeInfo->BufferStart);
if (PeiCpuMpData->ApLoopMode == ApInMwaitLoop) {
//
// Get AP target C-state each time when waking up AP,
// for it maybe updated by platform again
//
PeiCpuMpData->ApTargetCState = PcdGet8 (PcdCpuApTargetCstate);
}
//
// Wakeup APs per AP loop state
//
if (PeiCpuMpData->ApLoopMode == ApInHltLoop || PeiCpuMpData->InitFlag) {
if (Broadcast) {
SendInitSipiSipiAllExcludingSelf ((UINT32) ExchangeInfo->BufferStart);
} else {
SendInitSipiSipi (
PeiCpuMpData->CpuData[ProcessorNumber].ApicId,
(UINT32) ExchangeInfo->BufferStart
);
}
} else if ((PeiCpuMpData->ApLoopMode == ApInMwaitLoop) ||
(PeiCpuMpData->ApLoopMode == ApInRunLoop)) {
if (Broadcast) {
for (Index = 0; Index < PeiCpuMpData->CpuCount; Index++) {
if (Index != PeiCpuMpData->BspNumber) {
*(PeiCpuMpData->CpuData[Index].StartupApSignal) = WAKEUP_AP_SIGNAL;
}
}
} else {
*(PeiCpuMpData->CpuData[ProcessorNumber].StartupApSignal) = WAKEUP_AP_SIGNAL;
}
} else {
ASSERT (FALSE);
}
return ;
}
@@ -600,7 +629,7 @@ CountProcessorNumber (
if (PeiCpuMpData->X2ApicEnable) {
DEBUG ((EFI_D_INFO, "Force x2APIC mode!\n"));
//
// Send 2nd broadcast IPI to all APs to enable x2APIC mode
// Wakeup all APs to enable x2APIC mode
//
WakeUpAP (PeiCpuMpData, TRUE, 0, ApFuncEnableX2Apic, NULL);
//