ArmEbPkg/Sec/Sec.c

   1 /** @file
   2   C Entry point for the SEC. First C code after the reset vector.
   3
   4   Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   5
   6   This program and the accompanying materials
   7   are licensed and made available under the terms and conditions of the BSD License
   8   which accompanies this distribution.  The full text of the license may be found at
   9   http://opensource.org/licenses/bsd-license.php
  10
  11   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #include <PiPei.h>
  17
  18 #include <Library/DebugLib.h>
  19 #include <Library/PrePiLib.h>
  20 #include <Library/PcdLib.h>
  21 #include <Library/IoLib.h>
  22 #include <Library/ArmLib.h>
  23 #include <Library/PeCoffGetEntryPointLib.h>
  24 #include <Library/DebugAgentLib.h>
  25
  26 #include <Ppi/GuidedSectionExtraction.h>
  27 #include <Guid/LzmaDecompress.h>
  28
  29 #include <ArmEb/ArmEb.h>
  30
  31 #include "LzmaDecompress.h"
  32
  33 VOID
  34 EFIAPI
  35 _ModuleEntryPoint(
  36   VOID
  37   );
  38
  39 CHAR8 *
  40 DeCygwinPathIfNeeded (
  41   IN  CHAR8   *Name
  42   );
  43
  44 RETURN_STATUS
  45 EFIAPI
  46 SerialPortInitialize (
  47   VOID
  48   );
  49
  50
  51 VOID
  52 UartInit (
  53   VOID
  54   )
  55 {
  56   // SEC phase needs to run library constructors by hand.
  57   // This assumes we are linked agains the SerialLib
  58   // In non SEC modules the init call is in autogenerated code.
  59   SerialPortInitialize ();
  60 }
  61
  62 VOID
  63 TimerInit (
  64   VOID
  65   )
  66 {
  67   // configure SP810 to use 1MHz clock and disable
  68   MmioAndThenOr32 (EB_SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);
  69   // Enable
  70   MmioOr32 (EB_SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER2_EN);
  71
  72   // configure timer 2 for one shot operation, 32 bits, no prescaler, and interrupt disabled
  73   MmioOr32 (EB_SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ONESHOT | SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);
  74
  75   // preload the timer count register
  76   MmioWrite32 (EB_SP804_TIMER2_BASE + SP804_TIMER_LOAD_REG, 1);
  77
  78   // enable the timer
  79   MmioOr32 (EB_SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ENABLE);
  80 }
  81
  82
  83 VOID
  84 InitCache (
  85   IN  UINT32  MemoryBase,
  86   IN  UINT32  MemoryLength
  87   );
  88
  89 EFI_STATUS
  90 EFIAPI
  91 ExtractGuidedSectionLibConstructor (
  92   VOID
  93   );
  94
  95 EFI_STATUS
  96 EFIAPI
  97 LzmaDecompressLibConstructor (
  98   VOID
  99   );
 100
 101
 102 VOID
 103 CEntryPoint (
 104   IN  VOID  *MemoryBase,
 105   IN  UINTN MemorySize,
 106   IN  VOID  *StackBase,
 107   IN  UINTN StackSize
 108   )
 109 {
 110   VOID *HobBase;
 111
 112   // Build a basic HOB list
 113   HobBase      = (VOID *)(UINTN)(FixedPcdGet32(PcdEmbeddedFdBaseAddress) + FixedPcdGet32(PcdEmbeddedFdSize));
 114   CreateHobList (MemoryBase, MemorySize, HobBase, StackBase);
 115
 116
 117   // Enable program flow prediction, if supported.
 118   ArmEnableBranchPrediction ();
 119
 120   // Initialize CPU cache
 121   InitCache ((UINT32)MemoryBase, (UINT32)MemorySize);
 122
 123   // Add memory allocation hob for relocated FD
 124   BuildMemoryAllocationHob (FixedPcdGet32(PcdEmbeddedFdBaseAddress), FixedPcdGet32(PcdEmbeddedFdSize), EfiBootServicesData);
 125
 126   // Add the FVs to the hob list
 127   BuildFvHob (PcdGet32(PcdFlashFvMainBase), PcdGet32(PcdFlashFvMainSize));
 128
 129   // Start talking
 130   UartInit ();
 131
 132   InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, NULL);
 133   SaveAndSetDebugTimerInterrupt (TRUE);
 134
 135   DEBUG ((EFI_D_ERROR, "UART Enabled\n"));
 136
 137   // Start up a free running timer so that the timer lib will work
 138   TimerInit ();
 139
 140   // SEC phase needs to run library constructors by hand.
 141   ExtractGuidedSectionLibConstructor ();
 142   LzmaDecompressLibConstructor ();
 143
 144   // Build HOBs to pass up our version of stuff the DXE Core needs to save space
 145   BuildPeCoffLoaderHob ();
 146   BuildExtractSectionHob (
 147     &gLzmaCustomDecompressGuid,
 148     LzmaGuidedSectionGetInfo,
 149     LzmaGuidedSectionExtraction
 150     );
 151
 152   // Assume the FV that contains the SEC (our code) also contains a compressed FV.
 153   DecompressFirstFv ();
 154
 155   // Load the DXE Core and transfer control to it
 156   LoadDxeCoreFromFv (NULL, 0);
 157
 158   // DXE Core should always load and never return
 159   ASSERT (FALSE);
 160 }
 161