diff options
Diffstat (limited to 'ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S')
| -rw-r--r-- | ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S | 184 |
1 files changed, 0 insertions, 184 deletions
diff --git a/ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S b/ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S deleted file mode 100644 index f0cf865b3c..0000000000 --- a/ArmVirtPkg/PrePi/AArch64/ModuleEntryPoint.S +++ /dev/null @@ -1,184 +0,0 @@ -//
-// 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)
-ASM_GLOBAL ASM_PFX(mSystemMemoryEnd)
-
-StartupAddr: .8byte ASM_PFX(CEntryPoint)
-ASM_PFX(mSystemMemoryEnd): .8byte 0
-
-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
- adr x2, mSystemMemoryEnd
- str x1, [x2]
-
- // 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
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