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/** @file
*
* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/
#include "PrePi.h"
#include <Library/ArmGicLib.h>
#include <Ppi/ArmMpCoreInfo.h>
VOID
PrimaryMain (
IN UINTN UefiMemoryBase,
IN UINTN StacksBase,
IN UINT64 StartTimeStamp
)
{
// Enable the GIC Distributor
ArmGicEnableDistributor(PcdGet64(PcdGicDistributorBase));
// In some cases, the secondary cores are waiting for an SGI from the next stage boot loader to resume their initialization
if (!FixedPcdGet32(PcdSendSgiToBringUpSecondaryCores)) {
// Sending SGI to all the Secondary CPU interfaces
ArmGicSendSgiTo (PcdGet64(PcdGicDistributorBase), ARM_GIC_ICDSGIR_FILTER_EVERYONEELSE, 0x0E, PcdGet32 (PcdGicSgiIntId));
}
PrePiMain (UefiMemoryBase, StacksBase, StartTimeStamp);
// We must never return
ASSERT(FALSE);
}
VOID
SecondaryMain (
IN UINTN MpId
)
{
EFI_STATUS Status;
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);
// On MP Core Platform we must implement the ARM MP Core Info PPI (gArmMpCoreInfoPpiGuid)
Status = GetPlatformPpi (&gArmMpCoreInfoPpiGuid, (VOID**)&ArmMpCoreInfoPpi);
ASSERT_EFI_ERROR (Status);
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 (PcdGet64 (PcdGicInterruptInterfaceBase), &InterruptId);
// Check if it is a valid interrupt ID
if (InterruptId < ArmGicGetMaxNumInterrupts (PcdGet64 (PcdGicDistributorBase))) {
// Got a valid SGI number hence signal End of Interrupt
ArmGicEndOfInterrupt (PcdGet64 (PcdGicInterruptInterfaceBase), AcknowledgeInterrupt);
}
} while (SecondaryEntryAddr == 0);
// Jump to secondary core entry point.
SecondaryStart = (VOID (*)())SecondaryEntryAddr;
SecondaryStart();
// The secondaries shouldn't reach here
ASSERT(FALSE);
}
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