ArmPlatformPkg/PrePeiCore/MainMPCore.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011-2012, ARM Limited. All rights reserved.
   4 *
   5 *  This program and the accompanying materials
   6 *  are licensed and made available under the terms and conditions of the BSD License
   7 *  which accompanies this distribution.  The full text of the license may be found at
   8 *  http://opensource.org/licenses/bsd-license.php
   9 *
  10 *  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 *  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 *
  13 **/
  14
  15 #include <Library/ArmGicLib.h>
  16
  17 #include <Ppi/ArmMpCoreInfo.h>
  18
  19 #include "PrePeiCore.h"
  20
  21 /*
  22  * This is the main function for secondary cores. They loop around until a non Null value is written to
  23  * SYS_FLAGS register.The SYS_FLAGS register is platform specific.
  24  * Note:The secondary cores, while executing secondary_main, assumes that:
  25  *      : SGI 0 is configured as Non-secure interrupt
  26  *      : Priority Mask is configured to allow SGI 0
  27  *      : Interrupt Distributor and CPU interfaces are enabled
  28  *
  29  */
  30 VOID
  31 EFIAPI
  32 SecondaryMain (
  33   IN UINTN MpId
  34   )
  35 {
  36   EFI_STATUS              Status;
  37   UINTN                   PpiListSize;
  38   UINTN                   PpiListCount;
  39   EFI_PEI_PPI_DESCRIPTOR  *PpiList;
  40   ARM_MP_CORE_INFO_PPI    *ArmMpCoreInfoPpi;
  41   UINTN                   Index;
  42   UINTN                   ArmCoreCount;
  43   ARM_CORE_INFO           *ArmCoreInfoTable;
  44   UINT32                  ClusterId;
  45   UINT32                  CoreId;
  46   VOID                    (*SecondaryStart)(VOID);
  47   UINTN                   SecondaryEntryAddr;
  48   UINTN                   Interrupt;
  49
  50   ClusterId = GET_CLUSTER_ID(MpId);
  51   CoreId    = GET_CORE_ID(MpId);
  52
  53   // Get the gArmMpCoreInfoPpiGuid
  54   PpiListSize = 0;
  55   ArmPlatformGetPlatformPpiList (&PpiListSize, &PpiList);
  56   PpiListCount = PpiListSize / sizeof(EFI_PEI_PPI_DESCRIPTOR);
  57   for (Index = 0; Index < PpiListCount; Index++, PpiList++) {
  58     if (CompareGuid (PpiList->Guid, &gArmMpCoreInfoPpiGuid) == TRUE) {
  59       break;
  60     }
  61   }
  62
  63   // On MP Core Platform we must implement the ARM MP Core Info PPI
  64   ASSERT (Index != PpiListCount);
  65
  66   ArmMpCoreInfoPpi = PpiList->Ppi;
  67   ArmCoreCount = 0;
  68   Status = ArmMpCoreInfoPpi->GetMpCoreInfo (&ArmCoreCount, &ArmCoreInfoTable);
  69   ASSERT_EFI_ERROR (Status);
  70
  71   // Find the core in the ArmCoreTable
  72   for (Index = 0; Index < ArmCoreCount; Index++) {
  73     if ((ArmCoreInfoTable[Index].ClusterId == ClusterId) && (ArmCoreInfoTable[Index].CoreId == CoreId)) {
  74       break;
  75     }
  76   }
  77
  78   // The ARM Core Info Table must define every core
  79   ASSERT (Index != ArmCoreCount);
  80
  81   // Clear Secondary cores MailBox
  82   MmioWrite32 (ArmCoreInfoTable[Index].MailboxClearAddress, ArmCoreInfoTable[Index].MailboxClearValue);
  83
  84   do {
  85     ArmCallWFI ();
  86
  87     // Read the Mailbox
  88     SecondaryEntryAddr = MmioRead32 (ArmCoreInfoTable[Index].MailboxGetAddress);
  89
  90     // Acknowledge the interrupt and send End of Interrupt signal.
  91     Interrupt = ArmGicAcknowledgeInterrupt (PcdGet32 (PcdGicInterruptInterfaceBase));
  92     // Check if it is a valid interrupt ID
  93     if ((Interrupt & ARM_GIC_ICCIAR_ACKINTID) < ArmGicGetMaxNumInterrupts (PcdGet32 (PcdGicDistributorBase))) {
  94       // Got a valid SGI number hence signal End of Interrupt
  95       ArmGicEndOfInterrupt (PcdGet32 (PcdGicInterruptInterfaceBase), Interrupt);
  96     }
  97   } while (SecondaryEntryAddr == 0);
  98
  99   // Jump to secondary core entry point.
 100   SecondaryStart = (VOID (*)())SecondaryEntryAddr;
 101   SecondaryStart();
 102
 103   // The secondaries shouldn't reach here
 104   ASSERT(FALSE);
 105 }
 106
 107 VOID
 108 EFIAPI
 109 PrimaryMain (
 110   IN  EFI_PEI_CORE_ENTRY_POINT  PeiCoreEntryPoint
 111   )
 112 {
 113   EFI_SEC_PEI_HAND_OFF        SecCoreData;
 114   UINTN                       PpiListSize;
 115   EFI_PEI_PPI_DESCRIPTOR      *PpiList;
 116   UINTN                       TemporaryRamBase;
 117   UINTN                       TemporaryRamSize;
 118
 119   CreatePpiList (&PpiListSize, &PpiList);
 120
 121   // Enable the GIC Distributor
 122   ArmGicEnableDistributor (PcdGet32(PcdGicDistributorBase));
 123
 124   // If ArmVe has not been built as Standalone then we need to wake up the secondary cores
 125   if (FeaturePcdGet (PcdSendSgiToBringUpSecondaryCores)) {
 126     // Sending SGI to all the Secondary CPU interfaces
 127     ArmGicSendSgiTo (PcdGet32(PcdGicDistributorBase), ARM_GIC_ICDSGIR_FILTER_EVERYONEELSE, 0x0E, PcdGet32 (PcdGicSgiIntId));
 128   }
 129
 130   // Adjust the Temporary Ram as the new Ppi List (Common + Platform Ppi Lists) is created at
 131   // the base of the primary core stack
 132   PpiListSize = ALIGN_VALUE(PpiListSize, 0x4);
 133   TemporaryRamBase = (UINTN)PcdGet32 (PcdCPUCoresStackBase) + PpiListSize;
 134   TemporaryRamSize = (UINTN)PcdGet32 (PcdCPUCorePrimaryStackSize) - PpiListSize;
 135
 136   // Make sure the size is 8-byte aligned. Once divided by 2, the size should be 4-byte aligned
 137   // to ensure the stack pointer is 4-byte aligned.
 138   TemporaryRamSize = TemporaryRamSize - (TemporaryRamSize & (0x8-1));
 139
 140   //
 141   // Bind this information into the SEC hand-off state
 142   // Note: this must be in sync with the stuff in the asm file
 143   // Note also:  HOBs (pei temp ram) MUST be above stack
 144   //
 145   SecCoreData.DataSize               = sizeof(EFI_SEC_PEI_HAND_OFF);
 146   SecCoreData.BootFirmwareVolumeBase = (VOID *)(UINTN)PcdGet32 (PcdFvBaseAddress);
 147   SecCoreData.BootFirmwareVolumeSize = PcdGet32 (PcdFvSize);
 148   SecCoreData.TemporaryRamBase       = (VOID *)TemporaryRamBase; // We run on the primary core (and so we use the first stack)
 149   SecCoreData.TemporaryRamSize       = TemporaryRamSize;
 150   SecCoreData.PeiTemporaryRamBase    = SecCoreData.TemporaryRamBase;
 151   SecCoreData.PeiTemporaryRamSize    = SecCoreData.TemporaryRamSize / 2;
 152   SecCoreData.StackBase              = (VOID *)ALIGN_VALUE((UINTN)(SecCoreData.TemporaryRamBase) + SecCoreData.PeiTemporaryRamSize, 0x4);
 153   SecCoreData.StackSize              = (TemporaryRamBase + TemporaryRamSize) - (UINTN)SecCoreData.StackBase;
 154
 155   // Jump to PEI core entry point
 156   PeiCoreEntryPoint (&SecCoreData, PpiList);
 157 }