diff options
Diffstat (limited to 'ArmPlatformPkg/PrePi/Arm')
-rw-r--r-- | ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm b/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm deleted file mode 100644 index eaba90c..0000000 --- a/ArmPlatformPkg/PrePi/Arm/ModuleEntryPoint.asm +++ /dev/null @@ -1,142 +0,0 @@ -//
-// Copyright (c) 2011 - 2020, Arm Limited. All rights reserved.<BR>
-//
-// SPDX-License-Identifier: BSD-2-Clause-Patent
-//
-//
-
-#include <AutoGen.h>
-#include <Chipset/ArmV7.h>
-
- INCLUDE AsmMacroIoLib.inc
-
- IMPORT CEntryPoint
- IMPORT ArmPlatformIsPrimaryCore
- IMPORT ArmReadMpidr
- IMPORT ArmPlatformPeiBootAction
- IMPORT ArmPlatformStackSet
- IMPORT mSystemMemoryEnd
-
- EXPORT _ModuleEntryPoint
-
- PRESERVE8
- AREA PrePiCoreEntryPoint, CODE, READONLY
-
-StartupAddr DCD CEntryPoint
-
-_ModuleEntryPoint
- // Do early platform specific actions
- bl ArmPlatformPeiBootAction
-
- // Get ID of this CPU in multi-core system
- bl ArmReadMpidr
- // Keep a copy of the MpId register value
- mov r8, r0
-
-_SetSVCMode
- // Enter SVC mode, Disable FIQ and IRQ
- mov r1, #(CPSR_MODE_SVC :OR: CPSR_IRQ :OR: CPSR_FIQ)
- msr CPSR_c, r1
-
-// 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)
-_SystemMemoryEndInit
- adrll r1, mSystemMemoryEnd
- ldrd r2, r3, [r1]
- teq r3, #0
- moveq r1, r2
- mvnne r1, #0
-
-_SetupStackPosition
- // r1 = SystemMemoryTop
-
- // Calculate Top of the Firmware Device
- mov32 r2, FixedPcdGet32(PcdFdBaseAddress)
- mov32 r3, FixedPcdGet32(PcdFdSize)
- sub r3, r3, #1
- add r3, r3, r2 // r3 = FdTop = PcdFdBaseAddress + PcdFdSize
-
- // UEFI Memory Size (stacks are allocated in this region)
- mov32 r4, FixedPcdGet32(PcdSystemMemoryUefiRegionSize)
-
- //
- // 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 r0, r1, r3 // r0 = SystemMemoryTop - FdTop
- bmi _SetupStack // Jump if negative (FdTop > SystemMemoryTop). Case when the PrePi is in XIP memory outside of the DRAM
- cmp r0, r4
- bge _SetupStack
-
- // Case the top of stacks is the FdBaseAddress
- mov r1, r2
-
-_SetupStack
- // r1 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 r9, r1, #1
- bcs _SetupOverflowStack
-
-_SetupAlignedStack
- mov r1, r9
- b _GetBaseUefiMemory
-
-_SetupOverflowStack
- // Case memory at the top of the address space. Ensure the top of the stack is EFI_PAGE_SIZE
- // aligned (4KB)
- mov32 r9, EFI_PAGE_MASK
- and r9, r9, r1
- sub r1, r1, r9
-
-_GetBaseUefiMemory
- // Calculate the Base of the UEFI Memory
- sub r9, r1, r4
-
-_GetStackBase
- // r1 = The top of the Mpcore Stacks
- // Stack for the primary core = PrimaryCoreStack
- mov32 r2, FixedPcdGet32(PcdCPUCorePrimaryStackSize)
- sub r10, r1, r2
-
- // Stack for the secondary core = Number of Cores - 1
- mov32 r1, (FixedPcdGet32(PcdCoreCount) - 1) * FixedPcdGet32(PcdCPUCoreSecondaryStackSize)
- sub r10, r10, r1
-
- // r10 = The base of the MpCore Stacks (primary stack & secondary stacks)
- mov r0, r10
- mov r1, r8
- //ArmPlatformStackSet(StackBase, MpId, PrimaryStackSize, SecondaryStackSize)
- mov32 r2, FixedPcdGet32(PcdCPUCorePrimaryStackSize)
- mov32 r3, FixedPcdGet32(PcdCPUCoreSecondaryStackSize)
- bl ArmPlatformStackSet
-
- // Is it the Primary Core ?
- mov r0, r8
- bl ArmPlatformIsPrimaryCore
- cmp r0, #1
- bne _PrepareArguments
-
-_PrepareArguments
- mov r0, r8
- mov r1, r9
- mov r2, r10
-
- // Move sec startup address into a data register
- // Ensure we're jumping to FV version of the code (not boot remapped alias)
- ldr r4, StartupAddr
-
- // Jump to PrePiCore C code
- // r0 = MpId
- // r1 = UefiMemoryBase
- // r2 = StacksBase
- blx r4
-
-_NeverReturn
- b _NeverReturn
-
- END
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