Exemplo n.º 1
0
// When the firmware is built as not Standalone, the secondary cores need to wait the firmware
// entirely written into DRAM. It is the firmware from DRAM which will wake up the secondary cores.
VOID
NonSecureWaitForFirmware (
  VOID
  )
{
  VOID (*secondary_start)(VOID);

  // The secondary cores will execute the firmware once wake from WFI.
  secondary_start = (VOID (*)())PcdGet32(PcdFvBaseAddress);

  ArmCallWFI();

  // Acknowledge the interrupt and send End of Interrupt signal.
  ArmGicAcknowledgeInterrupt (PcdGet32(PcdGicDistributorBase), PcdGet32(PcdGicInterruptInterfaceBase), NULL, NULL);

  // Jump to secondary core entry point.
  secondary_start ();

  // PEI Core should always load and never return
  ASSERT (FALSE);
}
Exemplo n.º 2
0
/*
 * This is the main function for secondary cores. They loop around until a non Null value is written to
 * SYS_FLAGS register.The SYS_FLAGS register is platform specific.
 * Note:The secondary cores, while executing secondary_main, assumes that:
 *      : SGI 0 is configured as Non-secure interrupt
 *      : Priority Mask is configured to allow SGI 0
 *      : Interrupt Distributor and CPU interfaces are enabled
 *
 */
VOID
EFIAPI
SecondaryMain (
  IN UINTN MpId
  )
{
  EFI_STATUS              Status;
  UINTN                   PpiListSize;
  UINTN                   PpiListCount;
  EFI_PEI_PPI_DESCRIPTOR  *PpiList;
  ARM_MP_CORE_INFO_PPI    *ArmMpCoreInfoPpi;
  UINTN                   Index;
  UINTN                   ArmCoreCount;
  ARM_CORE_INFO           *ArmCoreInfoTable;
  UINT32                  ClusterId;
  UINT32                  CoreId;
  VOID                    (*SecondaryStart)(VOID);
  UINTN                   SecondaryEntryAddr;
  UINTN                   AcknowledgeInterrupt;
  UINTN                   InterruptId;

  ClusterId = GET_CLUSTER_ID(MpId);
  CoreId    = GET_CORE_ID(MpId);

  // Get the gArmMpCoreInfoPpiGuid
  PpiListSize = 0;
  ArmPlatformGetPlatformPpiList (&PpiListSize, &PpiList);
  PpiListCount = PpiListSize / sizeof(EFI_PEI_PPI_DESCRIPTOR);
  for (Index = 0; Index < PpiListCount; Index++, PpiList++) {
    if (CompareGuid (PpiList->Guid, &gArmMpCoreInfoPpiGuid) == TRUE) {
      break;
    }
  }

  // On MP Core Platform we must implement the ARM MP Core Info PPI
  ASSERT (Index != PpiListCount);

  ArmMpCoreInfoPpi = PpiList->Ppi;
  ArmCoreCount = 0;
  Status = ArmMpCoreInfoPpi->GetMpCoreInfo (&ArmCoreCount, &ArmCoreInfoTable);
  ASSERT_EFI_ERROR (Status);

  // Find the core in the ArmCoreTable
  for (Index = 0; Index < ArmCoreCount; Index++) {
    if ((ArmCoreInfoTable[Index].ClusterId == ClusterId) && (ArmCoreInfoTable[Index].CoreId == CoreId)) {
      break;
    }
  }

  // The ARM Core Info Table must define every core
  ASSERT (Index != ArmCoreCount);

  // Clear Secondary cores MailBox
  MmioWrite32 (ArmCoreInfoTable[Index].MailboxClearAddress, ArmCoreInfoTable[Index].MailboxClearValue);

  do {
    ArmCallWFI ();

    // Read the Mailbox
    SecondaryEntryAddr = MmioRead32 (ArmCoreInfoTable[Index].MailboxGetAddress);

    // Acknowledge the interrupt and send End of Interrupt signal.
    AcknowledgeInterrupt = ArmGicAcknowledgeInterrupt (PcdGet32 (PcdGicInterruptInterfaceBase), &InterruptId);
    // Check if it is a valid interrupt ID
    if (InterruptId < ArmGicGetMaxNumInterrupts (PcdGet32 (PcdGicDistributorBase))) {
      // Got a valid SGI number hence signal End of Interrupt
      ArmGicEndOfInterrupt (PcdGet32 (PcdGicInterruptInterfaceBase), AcknowledgeInterrupt);
    }
  } while (SecondaryEntryAddr == 0);

  // Jump to secondary core entry point.
  SecondaryStart = (VOID (*)())SecondaryEntryAddr;
  SecondaryStart();

  // The secondaries shouldn't reach here
  ASSERT(FALSE);
}