+++ /dev/null
-//\r
-// Copyright (c) 2011-2015, ARM Limited. All rights reserved.\r
-//\r
-// SPDX-License-Identifier: BSD-2-Clause-Patent\r
-//\r
-//\r
-\r
-#include <AutoGen.h>\r
-#include <Chipset/ArmV7.h>\r
-\r
- INCLUDE AsmMacroIoLib.inc\r
-\r
- IMPORT CEntryPoint\r
- IMPORT ArmPlatformIsPrimaryCore\r
- IMPORT ArmReadMpidr\r
- IMPORT ArmPlatformPeiBootAction\r
- IMPORT ArmPlatformStackSet\r
- IMPORT mSystemMemoryEnd\r
-\r
- EXPORT _ModuleEntryPoint\r
-\r
- PRESERVE8\r
- AREA PrePiCoreEntryPoint, CODE, READONLY\r
-\r
-StartupAddr DCD CEntryPoint\r
-\r
-_ModuleEntryPoint\r
- // Do early platform specific actions\r
- bl ArmPlatformPeiBootAction\r
-\r
- // Get ID of this CPU in Multicore system\r
- bl ArmReadMpidr\r
- // Keep a copy of the MpId register value\r
- mov r8, r0\r
-\r
-_SetSVCMode\r
- // Enter SVC mode, Disable FIQ and IRQ\r
- mov r1, #(CPSR_MODE_SVC :OR: CPSR_IRQ :OR: CPSR_FIQ)\r
- msr CPSR_c, r1\r
-\r
-// Check if we can install the stack at the top of the System Memory or if we need\r
-// to install the stacks at the bottom of the Firmware Device (case the FD is located\r
-// at the top of the DRAM)\r
-_SystemMemoryEndInit\r
- adrll r1, mSystemMemoryEnd\r
- ldrd r2, r3, [r1]\r
- teq r3, #0\r
- moveq r1, r2\r
- mvnne r1, #0\r
-\r
-_SetupStackPosition\r
- // r1 = SystemMemoryTop\r
-\r
- // Calculate Top of the Firmware Device\r
- mov32 r2, FixedPcdGet32(PcdFdBaseAddress)\r
- mov32 r3, FixedPcdGet32(PcdFdSize)\r
- sub r3, r3, #1\r
- add r3, r3, r2 // r3 = FdTop = PcdFdBaseAddress + PcdFdSize\r
-\r
- // UEFI Memory Size (stacks are allocated in this region)\r
- mov32 r4, FixedPcdGet32(PcdSystemMemoryUefiRegionSize)\r
-\r
- //\r
- // Reserve the memory for the UEFI region (contain stacks on its top)\r
- //\r
-\r
- // Calculate how much space there is between the top of the Firmware and the Top of the System Memory\r
- subs r0, r1, r3 // r0 = SystemMemoryTop - FdTop\r
- bmi _SetupStack // Jump if negative (FdTop > SystemMemoryTop). Case when the PrePi is in XIP memory outside of the DRAM\r
- cmp r0, r4\r
- bge _SetupStack\r
-\r
- // Case the top of stacks is the FdBaseAddress\r
- mov r1, r2\r
-\r
-_SetupStack\r
- // r1 contains the top of the stack (and the UEFI Memory)\r
-\r
- // Because the 'push' instruction is equivalent to 'stmdb' (decrement before), we need to increment\r
- // one to the top of the stack. We check if incrementing one does not overflow (case of DRAM at the\r
- // top of the memory space)\r
- adds r9, r1, #1\r
- bcs _SetupOverflowStack\r
-\r
-_SetupAlignedStack\r
- mov r1, r9\r
- b _GetBaseUefiMemory\r
-\r
-_SetupOverflowStack\r
- // Case memory at the top of the address space. Ensure the top of the stack is EFI_PAGE_SIZE\r
- // aligned (4KB)\r
- mov32 r9, EFI_PAGE_MASK\r
- and r9, r9, r1\r
- sub r1, r1, r9\r
-\r
-_GetBaseUefiMemory\r
- // Calculate the Base of the UEFI Memory\r
- sub r9, r1, r4\r
-\r
-_GetStackBase\r
- // r1 = The top of the Mpcore Stacks\r
- // Stack for the primary core = PrimaryCoreStack\r
- mov32 r2, FixedPcdGet32(PcdCPUCorePrimaryStackSize)\r
- sub r10, r1, r2\r
-\r
- // Stack for the secondary core = Number of Cores - 1\r
- mov32 r1, (FixedPcdGet32(PcdCoreCount) - 1) * FixedPcdGet32(PcdCPUCoreSecondaryStackSize)\r
- sub r10, r10, r1\r
-\r
- // r10 = The base of the MpCore Stacks (primary stack & secondary stacks)\r
- mov r0, r10\r
- mov r1, r8\r
- //ArmPlatformStackSet(StackBase, MpId, PrimaryStackSize, SecondaryStackSize)\r
- mov32 r2, FixedPcdGet32(PcdCPUCorePrimaryStackSize)\r
- mov32 r3, FixedPcdGet32(PcdCPUCoreSecondaryStackSize)\r
- bl ArmPlatformStackSet\r
-\r
- // Is it the Primary Core ?\r
- mov r0, r8\r
- bl ArmPlatformIsPrimaryCore\r
- cmp r0, #1\r
- bne _PrepareArguments\r
-\r
-_PrepareArguments\r
- mov r0, r8\r
- mov r1, r9\r
- mov r2, r10\r
-\r
- // Move sec startup address into a data register\r
- // Ensure we're jumping to FV version of the code (not boot remapped alias)\r
- ldr r4, StartupAddr\r
-\r
- // Jump to PrePiCore C code\r
- // r0 = MpId\r
- // r1 = UefiMemoryBase\r
- // r2 = StacksBase\r
- blx r4\r
-\r
-_NeverReturn\r
- b _NeverReturn\r
-\r
- END\r