ArmRealViewEbPkg/Sec/Sec.c

/** @file
  C Entry point for the SEC. First C code after the reset vector.

  Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
  
  This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#include <PiPei.h>

#include <Library/DebugLib.h>
#include <Library/PrePiLib.h>
#include <Library/PcdLib.h>
#include <Library/IoLib.h>
#include <Library/ArmLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/DebugAgentLib.h>

#include <Ppi/GuidedSectionExtraction.h>
#include <Guid/LzmaDecompress.h>

#include <ArmEb/ArmEb.h>

#include "LzmaDecompress.h"

VOID
EFIAPI 
_ModuleEntryPoint(
  VOID
  );

CHAR8 *
DeCygwinPathIfNeeded (
  IN  CHAR8   *Name
  );

RETURN_STATUS
EFIAPI
SerialPortInitialize (
  VOID
  );
  
  
VOID
UartInit (
  VOID
  )
{
  // SEC phase needs to run library constructors by hand.
  // This assumes we are linked agains the SerialLib
  // In non SEC modules the init call is in autogenerated code.
  SerialPortInitialize ();
}

VOID
TimerInit (
  VOID
  )
{
  // configure SP810 to use 1MHz clock and disable
  MmioAndThenOr32 (EB_SP810_CTRL_BASE + SP810_SYS_CTRL_REG, ~SP810_SYS_CTRL_TIMER2_EN, SP810_SYS_CTRL_TIMER2_TIMCLK);
  // Enable
  MmioOr32 (EB_SP810_CTRL_BASE + SP810_SYS_CTRL_REG, SP810_SYS_CTRL_TIMER2_EN);

  // configure timer 2 for one shot operation, 32 bits, no prescaler, and interrupt disabled
  MmioOr32 (EB_SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ONESHOT | SP804_TIMER_CTRL_32BIT | SP804_PRESCALE_DIV_1);

  // preload the timer count register
  MmioWrite32 (EB_SP804_TIMER2_BASE + SP804_TIMER_LOAD_REG, 1);

  // enable the timer
  MmioOr32 (EB_SP804_TIMER2_BASE + SP804_TIMER_CONTROL_REG, SP804_TIMER_CTRL_ENABLE);
}


VOID
InitCache (
  IN  UINT32  MemoryBase,
  IN  UINT32  MemoryLength
  );

EFI_STATUS
EFIAPI
ExtractGuidedSectionLibConstructor (
  VOID
  );

EFI_STATUS
EFIAPI
LzmaDecompressLibConstructor (
  VOID
  );


VOID
CEntryPoint (
  IN  VOID  *MemoryBase,
  IN  UINTN MemorySize,
  IN  VOID  *StackBase,
  IN  UINTN StackSize
  )
{
  VOID *HobBase;

  // HOB list is at bottom of stack area
  // Stack grows from top-to-bottom towards HOB list
  HobBase      = (VOID *)StackBase;
  CreateHobList (MemoryBase, MemorySize, HobBase, StackBase);

  // Turn off remapping NOR to 0. We can will now see DRAM in low memory
  MmioOr32 (0x10001000 ,BIT8); //EB_SP810_CTRL_BASE

  // Enable program flow prediction, if supported.
  ArmEnableBranchPrediction ();

  // Initialize CPU cache
  InitCache ((UINT32)MemoryBase, (UINT32)MemorySize);

  // Add memory allocation hob for relocated FD
  BuildMemoryAllocationHob (FixedPcdGet32(PcdEmbeddedFdBaseAddress), FixedPcdGet32(PcdEmbeddedFdSize), EfiBootServicesData);

  // Add the FVs to the hob list
  BuildFvHob (PcdGet32(PcdFlashFvMainBase), PcdGet32(PcdFlashFvMainSize));

  // Start talking
  UartInit ();

  InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, NULL, NULL);
  SaveAndSetDebugTimerInterrupt (TRUE);

  DEBUG ((EFI_D_ERROR, "UART Enabled\n"));

  // Start up a free running timer so that the timer lib will work
  TimerInit ();

  // SEC phase needs to run library constructors by hand.
  ExtractGuidedSectionLibConstructor ();
  LzmaDecompressLibConstructor ();

  // Build HOBs to pass up our version of stuff the DXE Core needs to save space
  BuildPeCoffLoaderHob ();
  BuildExtractSectionHob (
    &gLzmaCustomDecompressGuid,
    LzmaGuidedSectionGetInfo,
    LzmaGuidedSectionExtraction
    );

  // Assume the FV that contains the SEC (our code) also contains a compressed FV.
  DecompressFirstFv ();

  // Load the DXE Core and transfer control to it
  LoadDxeCoreFromFv (NULL, 0);
  
  // DXE Core should always load and never return
  ASSERT (FALSE);
}