diff options
| author | Jeff Fan <jeff.fan@intel.com> | 2016-07-21 00:23:52 +0800 |
|---|---|---|
| committer | Jeff Fan <jeff.fan@intel.com> | 2016-08-17 20:01:04 +0800 |
| commit | 96f5920d1d009fd2897f230e8bb49fe3f9a48aa0 (patch) | |
| tree | 167bbc45834d0625a394fcbd0c407d9f06c70fb0 /UefiCpuPkg | |
| parent | 7c3f2a1253d288b1b0867d973a50cd3ed64e37a4 (diff) | |
UefiCpuPkg/MpInitLib: Add WakeUpAP()
WakeUpAP() is used to wakeup APs per current ApLoopMode and make sure APs wake
up successfully.
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
Diffstat (limited to 'UefiCpuPkg')
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/MpLib.c | 121 | ||||
| -rw-r--r-- | UefiCpuPkg/Library/MpInitLib/MpLib.h | 19 |
2 files changed, 140 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c index d081111fbf..de169e6850 100644 --- a/UefiCpuPkg/Library/MpInitLib/MpLib.c +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c @@ -448,6 +448,29 @@ ApWakeupFunction ( }
/**
+ Wait for AP wakeup and write AP start-up signal till AP is waken up.
+
+ @param[in] ApStartupSignalBuffer Pointer to AP wakeup signal
+**/
+VOID
+WaitApWakeup (
+ IN volatile UINT32 *ApStartupSignalBuffer
+ )
+{
+ //
+ // If AP is waken up, StartupApSignal should be cleared.
+ // Otherwise, write StartupApSignal again till AP waken up.
+ //
+ while (InterlockedCompareExchange32 (
+ (UINT32 *) ApStartupSignalBuffer,
+ WAKEUP_AP_SIGNAL,
+ WAKEUP_AP_SIGNAL
+ ) != 0) {
+ CpuPause ();
+ }
+}
+
+/**
This function will fill the exchange info structure.
@param[in] CpuMpData Pointer to CPU MP Data
@@ -486,6 +509,104 @@ FillExchangeInfoData ( }
/**
+ This function will be called by BSP to wakeup AP.
+
+ @param[in] CpuMpData Pointer to CPU MP Data
+ @param[in] Broadcast TRUE: Send broadcast IPI to all APs
+ FALSE: Send IPI to AP by ApicId
+ @param[in] ProcessorNumber The handle number of specified processor
+ @param[in] Procedure The function to be invoked by AP
+ @param[in] ProcedureArgument The argument to be passed into AP function
+**/
+VOID
+WakeUpAP (
+ IN CPU_MP_DATA *CpuMpData,
+ IN BOOLEAN Broadcast,
+ IN UINTN ProcessorNumber,
+ IN EFI_AP_PROCEDURE Procedure, OPTIONAL
+ IN VOID *ProcedureArgument OPTIONAL
+ )
+{
+ volatile MP_CPU_EXCHANGE_INFO *ExchangeInfo;
+ UINTN Index;
+ CPU_AP_DATA *CpuData;
+ BOOLEAN ResetVectorRequired;
+
+ CpuMpData->FinishedCount = 0;
+ ResetVectorRequired = FALSE;
+
+ if (CpuMpData->ApLoopMode == ApInHltLoop ||
+ CpuMpData->InitFlag != ApInitDone) {
+ ResetVectorRequired = TRUE;
+ AllocateResetVector (CpuMpData);
+ FillExchangeInfoData (CpuMpData);
+ } else if (CpuMpData->ApLoopMode == ApInMwaitLoop) {
+ //
+ // Get AP target C-state each time when waking up AP,
+ // for it maybe updated by platform again
+ //
+ CpuMpData->ApTargetCState = PcdGet8 (PcdCpuApTargetCstate);
+ }
+
+ ExchangeInfo = CpuMpData->MpCpuExchangeInfo;
+
+ if (Broadcast) {
+ for (Index = 0; Index < CpuMpData->CpuCount; Index++) {
+ if (Index != CpuMpData->BspNumber) {
+ CpuData = &CpuMpData->CpuData[Index];
+ CpuData->ApFunction = (UINTN) Procedure;
+ CpuData->ApFunctionArgument = (UINTN) ProcedureArgument;
+ SetApState (CpuData, CpuStateReady);
+ if (CpuMpData->InitFlag != ApInitConfig) {
+ *(UINT32 *) CpuData->StartupApSignal = WAKEUP_AP_SIGNAL;
+ }
+ }
+ }
+ if (ResetVectorRequired) {
+ //
+ // Wakeup all APs
+ //
+ SendInitSipiSipiAllExcludingSelf ((UINT32) ExchangeInfo->BufferStart);
+ }
+ if (CpuMpData->InitFlag != ApInitConfig) {
+ //
+ // Wait all APs waken up if this is not the 1st broadcast of SIPI
+ //
+ for (Index = 0; Index < CpuMpData->CpuCount; Index++) {
+ CpuData = &CpuMpData->CpuData[Index];
+ if (Index != CpuMpData->BspNumber) {
+ WaitApWakeup (CpuData->StartupApSignal);
+ }
+ }
+ }
+ } else {
+ CpuData = &CpuMpData->CpuData[ProcessorNumber];
+ CpuData->ApFunction = (UINTN) Procedure;
+ CpuData->ApFunctionArgument = (UINTN) ProcedureArgument;
+ SetApState (CpuData, CpuStateReady);
+ //
+ // Wakeup specified AP
+ //
+ ASSERT (CpuMpData->InitFlag != ApInitConfig);
+ *(UINT32 *) CpuData->StartupApSignal = WAKEUP_AP_SIGNAL;
+ if (ResetVectorRequired) {
+ SendInitSipiSipi (
+ CpuData->ApicId,
+ (UINT32) ExchangeInfo->BufferStart
+ );
+ }
+ //
+ // Wait specified AP waken up
+ //
+ WaitApWakeup (CpuData->StartupApSignal);
+ }
+
+ if (ResetVectorRequired) {
+ FreeResetVector (CpuMpData);
+ }
+}
+
+/**
MP Initialize Library initialization.
This service will allocate AP reset vector and wakeup all APs to do APs
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h b/UefiCpuPkg/Library/MpInitLib/MpLib.h index 72a35ef7be..84e09702b9 100644 --- a/UefiCpuPkg/Library/MpInitLib/MpLib.h +++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h @@ -283,6 +283,25 @@ FreeResetVector ( );
/**
+ This function will be called by BSP to wakeup AP.
+
+ @param[in] CpuMpData Pointer to CPU MP Data
+ @param[in] Broadcast TRUE: Send broadcast IPI to all APs
+ FALSE: Send IPI to AP by ApicId
+ @param[in] ProcessorNumber The handle number of specified processor
+ @param[in] Procedure The function to be invoked by AP
+ @param[in] ProcedureArgument The argument to be passed into AP function
+**/
+VOID
+WakeUpAP (
+ IN CPU_MP_DATA *CpuMpData,
+ IN BOOLEAN Broadcast,
+ IN UINTN ProcessorNumber,
+ IN EFI_AP_PROCEDURE Procedure, OPTIONAL
+ IN VOID *ProcedureArgument OPTIONAL
+ );
+
+/**
Initialize global data for MP support.
@param[in] CpuMpData The pointer to CPU MP Data structure.
|