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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3 09/27] ArmVirtualizationPkg: add a relocatable version of PrePi
The main comments about this patch is about the ELF Relocation Table manipulation. The code looks alright but I had to guess what some magic offsets were meaning. On 03/02/15 19:19, Ard Biesheuvel wrote: 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 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> --- .../ArmVirtualizationPkg/PrePi/AArch64/ArchPrePi.c | 33 ++++ .../PrePi/AArch64/ModuleEntryPoint.S | 170 +++++++++++++++++ .../PrePi/ArmVirtPrePiUniCoreRelocatable.inf | 107 +++++++++++ .../ArmVirtualizationPkg/PrePi/LzmaDecompress.h | 103 +++++++++++ ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.c | 203 +++++++++++++++++++++ ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.h | 77 ++++++++ .../PrePi/Scripts/PrePi-PIE.lds | 28 +++ 7 files changed, 721 insertions(+) create mode 100644 ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ArchPrePi.c create mode 100644 ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ModuleEntryPoint.S create mode 100755 ArmPlatformPkg/ArmVirtualizationPkg/PrePi/ArmVirtPrePiUniCoreRelocatable.inf create mode 100644 ArmPlatformPkg/ArmVirtualizationPkg/PrePi/LzmaDecompress.h create mode 100755 ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.c create mode 100644 ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.h create mode 100644 ArmPlatformPkg/ArmVirtualizationPkg/PrePi/Scripts/PrePi-PIE.lds diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ArchPrePi.c b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ArchPrePi.c new file mode 100644 index 000000000000..217986107e44 --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ArchPrePi.c @@ -0,0 +1,33 @@ +/** @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); + } +} diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ModuleEntryPoint.S b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ModuleEntryPoint.S new file mode 100644 index 000000000000..963249626d2c --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/AArch64/ModuleEntryPoint.S @@ -0,0 +1,170 @@ +// +// 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 <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 + + ldp x11, x12, [x9], #24 Add a comment to explain where the '24' comes from (3 fields in Elf32_Rela) + cmp x12, #0x403 // R_AARCH64_RELATIVE + bne .Lreloc_loop + + ldr x12, [x9, #-8] + add x12, x12, x8 + str x12, [x11, x8] Add a comment to explain the different fields of the structure you are manipulating. + 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 + +_SetSVCMode: +// 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 diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/ArmVirtPrePiUniCoreRelocatable.inf b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/ArmVirtPrePiUniCoreRelocatable.inf new file mode 100755 index 000000000000..f8b06898ec0c --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/ArmVirtPrePiUniCoreRelocatable.inf @@ -0,0 +1,107 @@ +#/** @file +# +# Copyright (c) 2011-2014, ARM 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 diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/LzmaDecompress.h b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/LzmaDecompress.h new file mode 100644 index 000000000000..a79ff343d231 --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/LzmaDecompress.h @@ -0,0 +1,103 @@ +/** @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__ + diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.c b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.c new file mode 100755 index 000000000000..0772805890f2 --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.c @@ -0,0 +1,203 @@ +/** @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); +} diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.h b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.h new file mode 100644 index 000000000000..517429fab9a4 --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/PrePi.h @@ -0,0 +1,77 @@ +/** @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_ */ diff --git a/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/Scripts/PrePi-PIE.lds b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/Scripts/PrePi-PIE.lds new file mode 100644 index 000000000000..880f9b114ddd --- /dev/null +++ b/ArmPlatformPkg/ArmVirtualizationPkg/PrePi/Scripts/PrePi-PIE.lds @@ -0,0 +1,28 @@ +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) + } +} -- 1.8.3.2 -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2557590 ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No: 2548782 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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