ArmPlatformPkg/PrePi/PrePi.c

   1 /** @file
   2 *
   3 *  Copyright (c) 2011, 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 <PiPei.h>
  16
  17 #include <Library/DebugAgentLib.h>
  18 #include <Library/PrePiLib.h>
  19 #include <Library/IoLib.h>
  20 #include <Library/PrintLib.h>
  21 #include <Library/PeCoffGetEntryPointLib.h>
  22 #include <Library/TimerLib.h>
  23 #include <Library/PerformanceLib.h>
  24
  25 #include <Ppi/GuidedSectionExtraction.h>
  26 #include <Guid/LzmaDecompress.h>
  27
  28 #include "PrePi.h"
  29 #include "LzmaDecompress.h"
  30
  31 VOID
  32 PrePiCommonExceptionEntry (
  33   IN UINT32 Entry,
  34   IN UINT32 LR
  35   );
  36
  37 EFI_STATUS
  38 EFIAPI
  39 ExtractGuidedSectionLibConstructor (
  40   VOID
  41   );
  42
  43 EFI_STATUS
  44 EFIAPI
  45 LzmaDecompressLibConstructor (
  46   VOID
  47   );
  48
  49 VOID
  50 PrePiMain (
  51   IN  UINTN                     UefiMemoryBase,
  52   IN  UINT64                    StartTimeStamp
  53   )
  54 {
  55   EFI_HOB_HANDOFF_INFO_TABLE**  PrePiHobBase;
  56   EFI_STATUS                    Status;
  57   CHAR8                         Buffer[100];
  58   UINTN                         CharCount;
  59   UINTN                         UefiMemoryTop;
  60   UINTN                         StacksSize;
  61   UINTN                         StacksBase;
  62
  63   // Enable program flow prediction, if supported.
  64   ArmEnableBranchPrediction ();
  65
  66   if (FixedPcdGet32(PcdVFPEnabled)) {
  67     ArmEnableVFP();
  68   }
  69
  70   // Initialize the Serial Port
  71   SerialPortInitialize ();
  72   CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"UEFI firmware built at %a on %a\n\r",__TIME__, __DATE__);
  73   SerialPortWrite ((UINT8 *) Buffer, CharCount);
  74
  75   // Initialize the Debug Agent for Source Level Debugging
  76   InitializeDebugAgent (DEBUG_AGENT_INIT_POSTMEM_SEC, NULL, NULL);
  77   SaveAndSetDebugTimerInterrupt (TRUE);
  78
  79   UefiMemoryTop = UefiMemoryBase + FixedPcdGet32 (PcdSystemMemoryUefiRegionSize);
  80   StacksSize = PcdGet32 (PcdCPUCoresNonSecStackSize) * PcdGet32 (PcdMPCoreMaxCores);
  81   StacksBase = UefiMemoryTop - StacksSize;
  82
  83   // Check the PcdCPUCoresNonSecStackBase match with the calculated StackBase
  84   ASSERT (StacksBase == PcdGet32 (PcdCPUCoresNonSecStackBase));
  85
  86   PrePiHobBase = (EFI_HOB_HANDOFF_INFO_TABLE**)(PcdGet32 (PcdCPUCoresNonSecStackBase) + (PcdGet32 (PcdCPUCoresNonSecStackSize) / 2) - PcdGet32 (PcdHobListPtrGlobalOffset));
  87
  88   // Declare the PI/UEFI memory region
  89   *PrePiHobBase = HobConstructor (
  90     (VOID*)UefiMemoryBase,
  91     FixedPcdGet32 (PcdSystemMemoryUefiRegionSize),
  92     (VOID*)UefiMemoryBase,
  93     (VOID*)StacksBase  // The top of the UEFI Memory is reserved for the stacks
  94     );
  95
  96   // Initialize MMU and Memory HOBs (Resource Descriptor HOBs)
  97   Status = MemoryPeim (UefiMemoryBase, FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
  98   ASSERT_EFI_ERROR (Status);
  99
 100   // Create the Stacks HOB (reserve the memory for all stacks)
 101   BuildStackHob (StacksBase, StacksSize);
 102
 103   // Set the Boot Mode
 104   SetBootMode (ArmPlatformGetBootMode ());
 105
 106   // Initialize Platform HOBs (CpuHob and FvHob)
 107   Status = PlatformPeim ();
 108   ASSERT_EFI_ERROR (Status);
 109
 110   BuildMemoryTypeInformationHob ();
 111
 112   // Now, the HOB List has been initialized, we can register performance information
 113   PERF_START (NULL, "PEI", NULL, StartTimeStamp);
 114
 115   // SEC phase needs to run library constructors by hand.
 116   ExtractGuidedSectionLibConstructor ();
 117   LzmaDecompressLibConstructor ();
 118
 119   // Build HOBs to pass up our version of stuff the DXE Core needs to save space
 120   BuildPeCoffLoaderHob ();
 121   BuildExtractSectionHob (
 122     &gLzmaCustomDecompressGuid,
 123     LzmaGuidedSectionGetInfo,
 124     LzmaGuidedSectionExtraction
 125     );
 126
 127   // Assume the FV that contains the SEC (our code) also contains a compressed FV.
 128   Status = DecompressFirstFv ();
 129   ASSERT_EFI_ERROR (Status);
 130
 131   // Load the DXE Core and transfer control to it
 132   Status = LoadDxeCoreFromFv (NULL, 0);
 133   ASSERT_EFI_ERROR (Status);
 134 }
 135
 136 VOID
 137 CEntryPoint (
 138   IN  UINTN                     CoreId,
 139   IN  UINTN                     UefiMemoryBase
 140   )
 141 {
 142   UINT64   StartTimeStamp;
 143
 144   if ((CoreId == ARM_PRIMARY_CORE) && PerformanceMeasurementEnabled ()) {
 145     // Initialize the Timer Library to setup the Timer HW controller
 146     TimerConstructor ();
 147     // We cannot call yet the PerformanceLib because the HOB List has not been initialized
 148     StartTimeStamp = GetPerformanceCounter ();
 149   } else {
 150     StartTimeStamp = 0;
 151   }
 152
 153   // Clean Data cache
 154   ArmCleanInvalidateDataCache ();
 155
 156   // Invalidate instruction cache
 157   ArmInvalidateInstructionCache ();
 158
 159   //TODO:Drain Write Buffer
 160
 161   // Enable Instruction & Data caches
 162   ArmEnableDataCache ();
 163   ArmEnableInstructionCache ();
 164
 165   // Write VBAR - The Vector table must be 32-byte aligned
 166   ASSERT (((UINT32)PrePiVectorTable & ((1 << 5)-1)) == 0);
 167   ArmWriteVBar ((UINT32)PrePiVectorTable);
 168
 169   // If not primary Jump to Secondary Main
 170   if (CoreId == ARM_PRIMARY_CORE) {
 171     // Goto primary Main.
 172     PrimaryMain (UefiMemoryBase, StartTimeStamp);
 173   } else {
 174     SecondaryMain (CoreId);
 175   }
 176
 177   // DXE Core should always load and never return
 178   ASSERT (FALSE);
 179 }
 180
 181 VOID
 182 PrePiCommonExceptionEntry (
 183   IN UINT32 Entry,
 184   IN UINT32 LR
 185   )
 186 {
 187   CHAR8           Buffer[100];
 188   UINTN           CharCount;
 189
 190   switch (Entry) {
 191   case 0:
 192     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reset Exception at 0x%X\n\r",LR);
 193     break;
 194   case 1:
 195     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Undefined Exception at 0x%X\n\r",LR);
 196     break;
 197   case 2:
 198     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"SWI Exception at 0x%X\n\r",LR);
 199     break;
 200   case 3:
 201     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"PrefetchAbort Exception at 0x%X\n\r",LR);
 202     break;
 203   case 4:
 204     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"DataAbort Exception at 0x%X\n\r",LR);
 205     break;
 206   case 5:
 207     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reserved Exception at 0x%X\n\r",LR);
 208     break;
 209   case 6:
 210     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"IRQ Exception at 0x%X\n\r",LR);
 211     break;
 212   case 7:
 213     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"FIQ Exception at 0x%X\n\r",LR);
 214     break;
 215   default:
 216     CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Unknown Exception at 0x%X\n\r",LR);
 217     break;
 218   }
 219   SerialPortWrite ((UINT8 *) Buffer, CharCount);
 220   while(1);
 221 }