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ArmVirtualizationPkg: add a relocatable version of PrePi 

This patch introduces a relocatable PrePi, which can execute
from arbitrary offsets in RAM. This is intendend to be run
from a boot loader which passes a description of the actual
platform in a device tree, for instance.

This module is based on the PrePi implementations residing under
ArmPlatformPkg.

Contributed-under: TianoCore Contribution Agreement 1.0
Reviewed-by: Olivier Martin <olivier.martin@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16961 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ard Biesheuvel 2015-02-28 20:26:20 +00:00 committed by lersek
parent 616ea9daea
commit f9a9d2dc3c
7 changed files with 746 additions and 0 deletions
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33
ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ArchPrePi.c Normal file
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/** @file
*
* Copyright (c) 2011-2013, ARM Limited. All rights reserved.
*
* 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 "PrePi.h"
#include <Chipset/AArch64.h>
VOID
ArchInitialize (
VOID
)
{
// Enable Floating Point
if (FixedPcdGet32 (PcdVFPEnabled)) {
ArmEnableVFP ();
}
if (ArmReadCurrentEL () == AARCH64_EL2) {
// Trap General Exceptions. All exceptions that would be routed to EL1 are routed to EL2
ArmWriteHcr (ARM_HCR_TGE);
}
}

180
ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ModuleEntryPoint.S Normal file
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//
// Copyright (c) 2011-2013, ARM Limited. All rights reserved.
// Copyright (c) 2015, Linaro Limited. All rights reserved.
//
// 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 <AsmMacroIoLibV8.h>
#include <Base.h>
#include <Library/PcdLib.h>
#include <AutoGen.h>
.text
.align 3
GCC_ASM_IMPORT(ArmPlatformIsPrimaryCore)
GCC_ASM_IMPORT(ArmReadMpidr)
GCC_ASM_IMPORT(ArmPlatformPeiBootAction)
GCC_ASM_IMPORT(ArmPlatformStackSet)
GCC_ASM_EXPORT(_ModuleEntryPoint)
StartupAddr: .8byte ASM_PFX(CEntryPoint)
ASM_PFX(_ModuleEntryPoint):
//
// We are built as a ET_DYN PIE executable, so we need to process all
// relative relocations regardless of whether or not we are executing from
// the same offset we were linked at. This is only possible if we are
// running from RAM.
//
adr x8, __reloc_base
adr x9, __reloc_start
adr x10, __reloc_end
.Lreloc_loop:
cmp x9, x10
bhs .Lreloc_done
//
// AArch64 uses the ELF64 RELA format, which means each entry in the
// relocation table consists of
//
// UINT64 offset : the relative offset of the value that needs to
// be relocated
// UINT64 info : relocation type and symbol index (the latter is
// not used for R_AARCH64_RELATIVE relocations)
// UINT64 addend : value to be added to the value being relocated
//
ldp x11, x12, [x9], #24 // read offset into x11 and info into x12
cmp x12, #0x403 // check info == R_AARCH64_RELATIVE?
bne .Lreloc_loop // not a relative relocation? then skip
ldr x12, [x9, #-8] // read addend into x12
add x12, x12, x8 // add reloc base to addend to get relocated value
str x12, [x11, x8] // write relocated value at offset
b .Lreloc_loop
.Lreloc_done:
// Do early platform specific actions
bl ASM_PFX(ArmPlatformPeiBootAction)
// Get ID of this CPU in Multicore system
bl ASM_PFX(ArmReadMpidr)
// Keep a copy of the MpId register value
mov x10, x0
// Check if we can install the stack at the top of the System Memory or if we need
// to install the stacks at the bottom of the Firmware Device (case the FD is located
// at the top of the DRAM)
_SetupStackPosition:
// Compute Top of System Memory
ldr x1, PcdGet64 (PcdSystemMemoryBase)
ldr x2, PcdGet64 (PcdSystemMemorySize)
sub x2, x2, #1
add x1, x1, x2 // x1 = SystemMemoryTop = PcdSystemMemoryBase + PcdSystemMemorySize
// Calculate Top of the Firmware Device
ldr x2, PcdGet64 (PcdFdBaseAddress)
ldr w3, PcdGet32 (PcdFdSize)
sub x3, x3, #1
add x3, x3, x2 // x3 = FdTop = PcdFdBaseAddress + PcdFdSize
// UEFI Memory Size (stacks are allocated in this region)
LoadConstantToReg (FixedPcdGet32(PcdSystemMemoryUefiRegionSize), x4)
//
// Reserve the memory for the UEFI region (contain stacks on its top)
//
// Calculate how much space there is between the top of the Firmware and the Top of the System Memory
subs x0, x1, x3 // x0 = SystemMemoryTop - FdTop
b.mi _SetupStack // Jump if negative (FdTop > SystemMemoryTop). Case when the PrePi is in XIP memory outside of the DRAM
cmp x0, x4
b.ge _SetupStack
// Case the top of stacks is the FdBaseAddress
mov x1, x2
_SetupStack:
// x1 contains the top of the stack (and the UEFI Memory)
// Because the 'push' instruction is equivalent to 'stmdb' (decrement before), we need to increment
// one to the top of the stack. We check if incrementing one does not overflow (case of DRAM at the
// top of the memory space)
adds x11, x1, #1
b.cs _SetupOverflowStack
_SetupAlignedStack:
mov x1, x11
b _GetBaseUefiMemory
_SetupOverflowStack:
// Case memory at the top of the address space. Ensure the top of the stack is EFI_PAGE_SIZE
// aligned (4KB)
LoadConstantToReg (EFI_PAGE_MASK, x11)
and x11, x11, x1
sub x1, x1, x11
_GetBaseUefiMemory:
// Calculate the Base of the UEFI Memory
sub x11, x1, x4
_GetStackBase:
// r1 = The top of the Mpcore Stacks
// Stack for the primary core = PrimaryCoreStack
LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), x2)
sub x12, x1, x2
// Stack for the secondary core = Number of Cores - 1
LoadConstantToReg (FixedPcdGet32(PcdCoreCount), x0)
sub x0, x0, #1
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), x1)
mul x1, x1, x0
sub x12, x12, x1
// x12 = The base of the MpCore Stacks (primary stack & secondary stacks)
mov x0, x12
mov x1, x10
//ArmPlatformStackSet(StackBase, MpId, PrimaryStackSize, SecondaryStackSize)
LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), x2)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), x3)
bl ASM_PFX(ArmPlatformStackSet)
// Is it the Primary Core ?
mov x0, x10
bl ASM_PFX(ArmPlatformIsPrimaryCore)
cmp x0, #1
bne _PrepareArguments
_ReserveGlobalVariable:
LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), x0)
// InitializePrimaryStack($GlobalVariableSize, $Tmp1, $Tmp2)
InitializePrimaryStack(x0, x1, x2)
_PrepareArguments:
mov x0, x10
mov x1, x11
mov x2, x12
mov x3, sp
// Move sec startup address into a data register
// Ensure we're jumping to FV version of the code (not boot remapped alias)
ldr x4, StartupAddr
// Jump to PrePiCore C code
// x0 = MpId
// x1 = UefiMemoryBase
// x2 = StacksBase
// x3 = GlobalVariableBase
blr x4
_NeverReturn:
b _NeverReturn

108
ArmPlatformPkg/ArmVirtualizationPkg/PrePi/ArmVirtPrePiUniCoreRelocatable.inf Executable file
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#/** @file
#
# Copyright (c) 2011-2014, ARM Ltd. All rights reserved.<BR>
# Copyright (c) 2015, Linaro Ltd. 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.
#
#**/
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = ArmVirtPrePiUniCoreRelocatable
FILE_GUID = f7d9fd14-9335-4389-80c5-334d6abfcced
MODULE_TYPE = SEC
VALID_ARCHITECTURES = AARCH64
VERSION_STRING = 1.0
[Sources]
PrePi.c
[Sources.AArch64]
AArch64/ArchPrePi.c
AArch64/ModuleEntryPoint.S
[Packages]
MdePkg/MdePkg.dec
MdeModulePkg/MdeModulePkg.dec
EmbeddedPkg/EmbeddedPkg.dec
ArmPkg/ArmPkg.dec
ArmPlatformPkg/ArmPlatformPkg.dec
ArmPlatformPkg/ArmVirtualizationPkg/ArmVirtualizationPkg.dec
IntelFrameworkModulePkg/IntelFrameworkModulePkg.dec
[LibraryClasses]
BaseLib
DebugLib
ArmLib
IoLib
TimerLib
SerialPortLib
ExtractGuidedSectionLib
LzmaDecompressLib
PeCoffGetEntryPointLib
PrePiLib
ArmPlatformLib
ArmPlatformStackLib
MemoryAllocationLib
HobLib
PrePiHobListPointerLib
PlatformPeiLib
MemoryInitPeiLib
[Ppis]
gArmMpCoreInfoPpiGuid
[Guids]
gArmGlobalVariableGuid
gArmMpCoreInfoGuid
[FeaturePcd]
gEmbeddedTokenSpaceGuid.PcdPrePiProduceMemoryTypeInformationHob
gArmPlatformTokenSpaceGuid.PcdSendSgiToBringUpSecondaryCores
[FixedPcd]
gEfiMdeModulePkgTokenSpaceGuid.PcdFirmwareVersionString
gArmTokenSpaceGuid.PcdVFPEnabled
gArmTokenSpaceGuid.PcdFdSize
gArmTokenSpaceGuid.PcdFvSize
gArmPlatformTokenSpaceGuid.PcdCPUCorePrimaryStackSize
gArmPlatformTokenSpaceGuid.PcdCPUCoreSecondaryStackSize
gArmPlatformTokenSpaceGuid.PcdPeiGlobalVariableSize
gArmPlatformTokenSpaceGuid.PcdSystemMemoryUefiRegionSize
gArmPlatformTokenSpaceGuid.PcdCoreCount
gEmbeddedTokenSpaceGuid.PcdPrePiCpuMemorySize
gEmbeddedTokenSpaceGuid.PcdPrePiCpuIoSize
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIReclaimMemory
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiACPIMemoryNVS
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiReservedMemoryType
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesData
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesCode
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiBootServicesCode
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiBootServicesData
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiLoaderCode
gEmbeddedTokenSpaceGuid.PcdMemoryTypeEfiLoaderData
[Pcd]
gArmTokenSpaceGuid.PcdSystemMemoryBase
gArmTokenSpaceGuid.PcdSystemMemorySize
gArmVirtualizationTokenSpaceGuid.PcdDeviceTreeInitialBaseAddress
gArmTokenSpaceGuid.PcdFdBaseAddress
gArmTokenSpaceGuid.PcdFvBaseAddress
[BuildOptions]
GCC:*_*_AARCH64_DLINK_FLAGS = -pie -T $(MODULE_DIR)/Scripts/PrePi-PIE.lds

103
ArmPlatformPkg/ArmVirtualizationPkg/PrePi/LzmaDecompress.h Normal file
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/** @file
LZMA Decompress Library header file
Copyright (c) 2006 - 2010, Intel Corporation. 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.
**/
#ifndef __LZMA_DECOMPRESS_H___
#define __LZMA_DECOMPRESS_H___
/**
Examines a GUIDed section and returns the size of the decoded buffer and the
size of an scratch buffer required to actually decode the data in a GUIDed section.
Examines a GUIDed section specified by InputSection.
If GUID for InputSection does not match the GUID that this handler supports,
then RETURN_UNSUPPORTED is returned.
If the required information can not be retrieved from InputSection,
then RETURN_INVALID_PARAMETER is returned.
If the GUID of InputSection does match the GUID that this handler supports,
then the size required to hold the decoded buffer is returned in OututBufferSize,
the size of an optional scratch buffer is returned in ScratchSize, and the Attributes field
from EFI_GUID_DEFINED_SECTION header of InputSection is returned in SectionAttribute.
If InputSection is NULL, then ASSERT().
If OutputBufferSize is NULL, then ASSERT().
If ScratchBufferSize is NULL, then ASSERT().
If SectionAttribute is NULL, then ASSERT().
@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBufferSize A pointer to the size, in bytes, of an output buffer required
if the buffer specified by InputSection were decoded.
@param[out] ScratchBufferSize A pointer to the size, in bytes, required as scratch space
if the buffer specified by InputSection were decoded.
@param[out] SectionAttribute A pointer to the attributes of the GUIDed section. See the Attributes
field of EFI_GUID_DEFINED_SECTION in the PI Specification.
@retval RETURN_SUCCESS The information about InputSection was returned.
@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
@retval RETURN_INVALID_PARAMETER The information can not be retrieved from the section specified by InputSection.
**/
RETURN_STATUS
EFIAPI
LzmaGuidedSectionGetInfo (
IN CONST VOID *InputSection,
OUT UINT32 *OutputBufferSize,
OUT UINT32 *ScratchBufferSize,
OUT UINT16 *SectionAttribute
);
/**
Decompress a LZAM compressed GUIDed section into a caller allocated output buffer.
Decodes the GUIDed section specified by InputSection.
If GUID for InputSection does not match the GUID that this handler supports, then RETURN_UNSUPPORTED is returned.
If the data in InputSection can not be decoded, then RETURN_INVALID_PARAMETER is returned.
If the GUID of InputSection does match the GUID that this handler supports, then InputSection
is decoded into the buffer specified by OutputBuffer and the authentication status of this
decode operation is returned in AuthenticationStatus. If the decoded buffer is identical to the
data in InputSection, then OutputBuffer is set to point at the data in InputSection. Otherwise,
the decoded data will be placed in caller allocated buffer specified by OutputBuffer.
If InputSection is NULL, then ASSERT().
If OutputBuffer is NULL, then ASSERT().
If ScratchBuffer is NULL and this decode operation requires a scratch buffer, then ASSERT().
If AuthenticationStatus is NULL, then ASSERT().
@param[in] InputSection A pointer to a GUIDed section of an FFS formatted file.
@param[out] OutputBuffer A pointer to a buffer that contains the result of a decode operation.
@param[out] ScratchBuffer A caller allocated buffer that may be required by this function
as a scratch buffer to perform the decode operation.
@param[out] AuthenticationStatus
A pointer to the authentication status of the decoded output buffer.
See the definition of authentication status in the EFI_PEI_GUIDED_SECTION_EXTRACTION_PPI
section of the PI Specification. EFI_AUTH_STATUS_PLATFORM_OVERRIDE must
never be set by this handler.
@retval RETURN_SUCCESS The buffer specified by InputSection was decoded.
@retval RETURN_UNSUPPORTED The section specified by InputSection does not match the GUID this handler supports.
@retval RETURN_INVALID_PARAMETER The section specified by InputSection can not be decoded.
**/
RETURN_STATUS
EFIAPI
LzmaGuidedSectionExtraction (
IN CONST VOID *InputSection,
OUT VOID **OutputBuffer,
OUT VOID *ScratchBuffer, OPTIONAL
OUT UINT32 *AuthenticationStatus
);
#endif // __LZMADECOMPRESS_H__

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ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.c Executable file
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/** @file
*
* Copyright (c) 2011-2014, ARM Limited. All rights reserved.
*
* 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/PrePiLib.h>
#include <Library/PrintLib.h>
#include <Library/PeCoffGetEntryPointLib.h>
#include <Library/PrePiHobListPointerLib.h>
#include <Library/TimerLib.h>
#include <Library/PerformanceLib.h>
#include <Ppi/GuidedSectionExtraction.h>
#include <Ppi/ArmMpCoreInfo.h>
#include <Guid/LzmaDecompress.h>
#include <Guid/ArmGlobalVariableHob.h>
#include "PrePi.h"
#include "LzmaDecompress.h"
// Not used when PrePi in run in XIP mode
UINTN mGlobalVariableBase = 0;
EFI_STATUS
EFIAPI
ExtractGuidedSectionLibConstructor (
VOID
);
EFI_STATUS
EFIAPI
LzmaDecompressLibConstructor (
VOID
);
VOID
EFIAPI
BuildGlobalVariableHob (
IN EFI_PHYSICAL_ADDRESS GlobalVariableBase,
IN UINT32 GlobalVariableSize
)
{
ARM_HOB_GLOBAL_VARIABLE *Hob;
Hob = CreateHob (EFI_HOB_TYPE_GUID_EXTENSION, sizeof (ARM_HOB_GLOBAL_VARIABLE));
ASSERT(Hob != NULL);
CopyGuid (&(Hob->Header.Name), &gArmGlobalVariableGuid);
Hob->GlobalVariableBase = GlobalVariableBase;
Hob->GlobalVariableSize = GlobalVariableSize;
}
EFI_STATUS
GetPlatformPpi (
IN EFI_GUID *PpiGuid,
OUT VOID **Ppi
)
{
UINTN PpiListSize;
UINTN PpiListCount;
EFI_PEI_PPI_DESCRIPTOR *PpiList;
UINTN Index;
PpiListSize = 0;
ArmPlatformGetPlatformPpiList (&PpiListSize, &PpiList);
PpiListCount = PpiListSize / sizeof(EFI_PEI_PPI_DESCRIPTOR);
for (Index = 0; Index < PpiListCount; Index++, PpiList++) {
if (CompareGuid (PpiList->Guid, PpiGuid) == TRUE) {
*Ppi = PpiList->Ppi;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
VOID
PrePiMain (
IN UINTN UefiMemoryBase,
IN UINTN StacksBase,
IN UINTN GlobalVariableBase,
IN UINT64 StartTimeStamp
)
{
EFI_HOB_HANDOFF_INFO_TABLE* HobList;
EFI_STATUS Status;
CHAR8 Buffer[100];
UINTN CharCount;
UINTN StacksSize;
// Initialize the architecture specific bits
ArchInitialize ();
// Initialize the Serial Port
SerialPortInitialize ();
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"UEFI firmware (version %s built at %a on %a)\n\r",
(CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__);
SerialPortWrite ((UINT8 *) Buffer, CharCount);
// Declare the PI/UEFI memory region
HobList = HobConstructor (
(VOID*)UefiMemoryBase,
FixedPcdGet32 (PcdSystemMemoryUefiRegionSize),
(VOID*)UefiMemoryBase,
(VOID*)StacksBase // The top of the UEFI Memory is reserved for the stacks
);
PrePeiSetHobList (HobList);
// Initialize MMU and Memory HOBs (Resource Descriptor HOBs)
Status = MemoryPeim (UefiMemoryBase, FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
ASSERT_EFI_ERROR (Status);
// Create the Stacks HOB (reserve the memory for all stacks)
StacksSize = PcdGet32 (PcdCPUCorePrimaryStackSize);
BuildStackHob (StacksBase, StacksSize);
// Declare the Global Variable HOB
BuildGlobalVariableHob (GlobalVariableBase, FixedPcdGet32 (PcdPeiGlobalVariableSize));
//TODO: Call CpuPei as a library
BuildCpuHob (PcdGet8 (PcdPrePiCpuMemorySize), PcdGet8 (PcdPrePiCpuIoSize));
// Set the Boot Mode
SetBootMode (ArmPlatformGetBootMode ());
// Initialize Platform HOBs (CpuHob and FvHob)
Status = PlatformPeim ();
ASSERT_EFI_ERROR (Status);
// Now, the HOB List has been initialized, we can register performance information
PERF_START (NULL, "PEI", NULL, StartTimeStamp);
// 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.
Status = DecompressFirstFv ();
ASSERT_EFI_ERROR (Status);
// Load the DXE Core and transfer control to it
Status = LoadDxeCoreFromFv (NULL, 0);
ASSERT_EFI_ERROR (Status);
}
VOID
CEntryPoint (
IN UINTN MpId,
IN UINTN UefiMemoryBase,
IN UINTN StacksBase,
IN UINTN GlobalVariableBase
)
{
UINT64 StartTimeStamp;
// Initialize the platform specific controllers
ArmPlatformInitialize (MpId);
if (PerformanceMeasurementEnabled ()) {
// Initialize the Timer Library to setup the Timer HW controller
TimerConstructor ();
// We cannot call yet the PerformanceLib because the HOB List has not been initialized
StartTimeStamp = GetPerformanceCounter ();
} else {
StartTimeStamp = 0;
}
// Data Cache enabled on Primary core when MMU is enabled.
ArmDisableDataCache ();
// Invalidate Data cache
ArmInvalidateDataCache ();
// Invalidate instruction cache
ArmInvalidateInstructionCache ();
// Enable Instruction Caches on all cores.
ArmEnableInstructionCache ();
// Define the Global Variable region
mGlobalVariableBase = GlobalVariableBase;
PrePiMain (UefiMemoryBase, StacksBase, GlobalVariableBase, StartTimeStamp);
// DXE Core should always load and never return
ASSERT (FALSE);
}

77
ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.h Normal file
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/** @file
*
* Copyright (c) 2011-2012, ARM Limited. All rights reserved.
*
* 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.
*
**/
#ifndef _PREPI_H_
#define _PREPI_H_
#include <PiPei.h>
#include <Library/PcdLib.h>
#include <Library/ArmLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
#include <Library/IoLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/HobLib.h>
#include <Library/SerialPortLib.h>
#include <Library/ArmPlatformLib.h>
#define SerialPrint(txt) SerialPortWrite (txt, AsciiStrLen(txt)+1);
RETURN_STATUS
EFIAPI
TimerConstructor (
VOID
);
VOID
PrePiMain (
IN UINTN UefiMemoryBase,
IN UINTN StacksBase,
IN UINTN GlobalVariableBase,
IN UINT64 StartTimeStamp
);
EFI_STATUS
EFIAPI
MemoryPeim (
IN EFI_PHYSICAL_ADDRESS UefiMemoryBase,
IN UINT64 UefiMemorySize
);
EFI_STATUS
EFIAPI
PlatformPeim (
VOID
);
// Either implemented by PrePiLib or by MemoryInitPei
VOID
BuildMemoryTypeInformationHob (
VOID
);
EFI_STATUS
GetPlatformPpi (
IN EFI_GUID *PpiGuid,
OUT VOID **Ppi
);
// Initialize the Architecture specific controllers
VOID
ArchInitialize (
VOID
);
#endif /* _PREPI_H_ */

42
ArmPlatformPkg/ArmVirtualizationPkg/PrePi/Scripts/PrePi-PIE.lds Normal file
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#/** @file
#
# Copyright (c) 2015, Linaro Ltd. 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.
#
#**/
SECTIONS
{
.text 0x0 : {
PROVIDE(__reloc_base = .);
*(.text .text*)
*(.got .got*)
*(.rodata .rodata*)
*(.data .data*)
. = ALIGN(0x20);
PROVIDE(__reloc_start = .);
*(.rela .rela*)
PROVIDE(__reloc_end = .);
}
.bss ALIGN(0x20) : { *(.bss .bss*) }
/DISCARD/ : {
*(.note.GNU-stack)
*(.gnu_debuglink)
*(.interp)
*(.dynamic)
*(.dynsym)
*(.dynstr)
*(.hash)
*(.comment)
}
}