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/** @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;
// Build a basic HOB list
HobBase = (VOID *)(UINTN)(FixedPcdGet32(PcdEmbeddedFdBaseAddress) + FixedPcdGet32(PcdEmbeddedFdSize));
CreateHobList (MemoryBase, MemorySize, HobBase, StackBase);
// 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);
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);
}
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