From 7fbd1eb2312d3dfab2ac8cdfcefc234c73d8aeeb Mon Sep 17 00:00:00 2001 From: Olivier Martin Date: Fri, 29 May 2015 13:50:43 +0000 Subject: Renamed ArmPlatformPkg/ArmVirtualizationPkg into ArmVirtPkg Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin Reviewed-by: Laszlo Ersek Tested-by: Laszlo Ersek git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17537 6f19259b-4bc3-4df7-8a09-765794883524 --- ArmVirtPkg/PrePi/AArch64/ArchPrePi.c | 33 +++++ ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S | 180 ++++++++++++++++++++++++++++ 2 files changed, 213 insertions(+) create mode 100644 ArmVirtPkg/PrePi/AArch64/ArchPrePi.c create mode 100644 ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S (limited to 'ArmVirtPkg/PrePi/AArch64') diff --git a/ArmVirtPkg/PrePi/AArch64/ArchPrePi.c b/ArmVirtPkg/PrePi/AArch64/ArchPrePi.c new file mode 100644 index 0000000000..217986107e --- /dev/null +++ b/ArmVirtPkg/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 + +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/ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S b/ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S new file mode 100644 index 0000000000..568d0086d6 --- /dev/null +++ b/ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S @@ -0,0 +1,180 @@ +// +// 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 +#include +#include +#include + +.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 -- cgit v1.2.3