return (UINTN) -1;
}
+/**
+ Get available system memory below 1MB by specified size.
+
+ @param PeiCpuMpData Pointer to PEI CPU MP Data
+**/
+VOID
+BackupAndPrepareWakeupBuffer(
+ IN PEI_CPU_MP_DATA *PeiCpuMpData
+ )
+{
+ CopyMem (
+ (VOID *) PeiCpuMpData->BackupBuffer,
+ (VOID *) PeiCpuMpData->WakeupBuffer,
+ PeiCpuMpData->BackupBufferSize
+ );
+ CopyMem (
+ (VOID *) PeiCpuMpData->WakeupBuffer,
+ (VOID *) PeiCpuMpData->AddressMap.RendezvousFunnelAddress,
+ PeiCpuMpData->AddressMap.RendezvousFunnelSize
+ );
+}
+/**
+ Prepare for AP wakeup buffer and copy AP reset code into it.
+
+ Get wakeup buffer below 1MB. Allocate memory for CPU MP Data and APs Stack.
+
+ @return Pointer to PEI CPU MP Data
+**/
+PEI_CPU_MP_DATA *
+PrepareAPStartupVector (
+ VOID
+ )
+{
+ EFI_STATUS Status;
+ UINT32 MaxCpuCount;
+ PEI_CPU_MP_DATA *PeiCpuMpData;
+ EFI_PHYSICAL_ADDRESS Buffer;
+ UINTN BufferSize;
+ UINTN WakeupBuffer;
+ UINTN WakeupBufferSize;
+ MP_ASSEMBLY_ADDRESS_MAP AddressMap;
+
+ AsmGetAddressMap (&AddressMap);
+ WakeupBufferSize = AddressMap.RendezvousFunnelSize + sizeof (MP_CPU_EXCHANGE_INFO);
+ WakeupBuffer = GetWakeupBuffer ((WakeupBufferSize + SIZE_4KB - 1) & ~(SIZE_4KB - 1));
+ DEBUG ((EFI_D_INFO, "CpuMpPei: WakeupBuffer = 0x%x\n", WakeupBuffer));
+
+ //
+ // Allocate Pages for APs stack, CPU MP Data and backup buffer for wakeup buffer
+ //
+ MaxCpuCount = PcdGet32(PcdCpuMaxLogicalProcessorNumber);
+ BufferSize = PcdGet32 (PcdCpuApStackSize) * MaxCpuCount + sizeof (PEI_CPU_MP_DATA)
+ + WakeupBufferSize + sizeof (PEI_CPU_DATA) * MaxCpuCount;
+ Status = PeiServicesAllocatePages (
+ EfiBootServicesData,
+ EFI_SIZE_TO_PAGES (BufferSize),
+ &Buffer
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ PeiCpuMpData = (PEI_CPU_MP_DATA *) (UINTN) (Buffer + PcdGet32 (PcdCpuApStackSize) * MaxCpuCount);
+ PeiCpuMpData->Buffer = (UINTN) Buffer;
+ PeiCpuMpData->CpuApStackSize = PcdGet32 (PcdCpuApStackSize);
+ PeiCpuMpData->WakeupBuffer = WakeupBuffer;
+ PeiCpuMpData->BackupBuffer = (UINTN)PeiCpuMpData + sizeof (PEI_CPU_MP_DATA);
+ PeiCpuMpData->BackupBufferSize = WakeupBufferSize;
+ PeiCpuMpData->MpCpuExchangeInfo = (MP_CPU_EXCHANGE_INFO *) (UINTN) (WakeupBuffer + AddressMap.RendezvousFunnelSize);
+
+ PeiCpuMpData->CpuCount = 1;
+ PeiCpuMpData->BspNumber = 0;
+ PeiCpuMpData->CpuData = (PEI_CPU_DATA *) (PeiCpuMpData->MpCpuExchangeInfo + 1);
+ PeiCpuMpData->CpuData[0].ApicId = GetInitialApicId ();
+ PeiCpuMpData->CpuData[0].Health.Uint32 = 0;
+ CopyMem (&PeiCpuMpData->AddressMap, &AddressMap, sizeof (MP_ASSEMBLY_ADDRESS_MAP));
+
+ //
+ // Backup original data and copy AP reset code in it
+ //
+ BackupAndPrepareWakeupBuffer(PeiCpuMpData);
+
+ return PeiCpuMpData;
+}
/**
The Entry point of the MP CPU PEIM.
)
{
+ PEI_CPU_MP_DATA *PeiCpuMpData;
//
// Load new GDT table on BSP
//
AsmInitializeGdt (&mGdt);
+ //
+ // Get wakeup buffer and copy AP reset code in it
+ //
+ PeiCpuMpData = PrepareAPStartupVector ();
return EFI_SUCCESS;
}