105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/** @file
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Copyright (c) 2011-2014, ARM Limited. All rights reserved.
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "PrePi.h"
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#include <Library/ArmGicLib.h>
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#include <Ppi/ArmMpCoreInfo.h>
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VOID
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PrimaryMain (
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IN UINTN UefiMemoryBase,
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IN UINTN StacksBase,
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IN UINT64 StartTimeStamp
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)
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{
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// Enable the GIC Distributor
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ArmGicEnableDistributor (PcdGet64 (PcdGicDistributorBase));
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// In some cases, the secondary cores are waiting for an SGI from the next stage boot loader to resume their initialization
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if (!FixedPcdGet32 (PcdSendSgiToBringUpSecondaryCores)) {
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// Sending SGI to all the Secondary CPU interfaces
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ArmGicSendSgiTo (PcdGet64 (PcdGicDistributorBase), ARM_GIC_ICDSGIR_FILTER_EVERYONEELSE, 0x0E, PcdGet32 (PcdGicSgiIntId));
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}
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PrePiMain (UefiMemoryBase, StacksBase, StartTimeStamp);
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// We must never return
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ASSERT (FALSE);
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}
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VOID
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SecondaryMain (
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IN UINTN MpId
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)
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{
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EFI_STATUS Status;
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ARM_MP_CORE_INFO_PPI *ArmMpCoreInfoPpi;
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UINTN Index;
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UINTN ArmCoreCount;
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ARM_CORE_INFO *ArmCoreInfoTable;
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UINT32 ClusterId;
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UINT32 CoreId;
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VOID (*SecondaryStart)(
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VOID
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);
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UINTN SecondaryEntryAddr;
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UINTN AcknowledgeInterrupt;
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UINTN InterruptId;
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ClusterId = GET_CLUSTER_ID (MpId);
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CoreId = GET_CORE_ID (MpId);
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// On MP Core Platform we must implement the ARM MP Core Info PPI (gArmMpCoreInfoPpiGuid)
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Status = GetPlatformPpi (&gArmMpCoreInfoPpiGuid, (VOID **)&ArmMpCoreInfoPpi);
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ASSERT_EFI_ERROR (Status);
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ArmCoreCount = 0;
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Status = ArmMpCoreInfoPpi->GetMpCoreInfo (&ArmCoreCount, &ArmCoreInfoTable);
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ASSERT_EFI_ERROR (Status);
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// Find the core in the ArmCoreTable
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for (Index = 0; Index < ArmCoreCount; Index++) {
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if ((GET_MPIDR_AFF1 (ArmCoreInfoTable[Index].Mpidr) == ClusterId) &&
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(GET_MPIDR_AFF0 (ArmCoreInfoTable[Index].Mpidr) == CoreId))
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{
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break;
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}
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}
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// The ARM Core Info Table must define every core
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ASSERT (Index != ArmCoreCount);
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// Clear Secondary cores MailBox
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MmioWrite32 (ArmCoreInfoTable[Index].MailboxClearAddress, ArmCoreInfoTable[Index].MailboxClearValue);
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do {
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ArmCallWFI ();
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// Read the Mailbox
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SecondaryEntryAddr = MmioRead32 (ArmCoreInfoTable[Index].MailboxGetAddress);
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// Acknowledge the interrupt and send End of Interrupt signal.
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AcknowledgeInterrupt = ArmGicAcknowledgeInterrupt (PcdGet64 (PcdGicInterruptInterfaceBase), &InterruptId);
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// Check if it is a valid interrupt ID
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if (InterruptId < ArmGicGetMaxNumInterrupts (PcdGet64 (PcdGicDistributorBase))) {
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// Got a valid SGI number hence signal End of Interrupt
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ArmGicEndOfInterrupt (PcdGet64 (PcdGicInterruptInterfaceBase), AcknowledgeInterrupt);
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}
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} while (SecondaryEntryAddr == 0);
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// Jump to secondary core entry point.
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SecondaryStart = (VOID (*)()) SecondaryEntryAddr;
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SecondaryStart ();
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// The secondaries shouldn't reach here
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ASSERT (FALSE);
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}
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