0787bc6184
On MpCore system, the primary core can now be any core of the system. To identify the primary core, you can use 'gArmTokenSpaceGuid.PcdArmPrimaryCoreMask' and 'gArmTokenSpaceGuid.PcdArmPrimaryCore'. These PCDs by default use the ClusterId and CoreId to identify the core. And the primary core is defined as the ClusetrId=0 and CoreId=0. The helper macros are: IS_PRIMARY_CORE(MpId), GET_CORE_ID(MpId), GET_CLUSTER_ID(MpId), GET_CORE_POS(MpId), PRIMARY_CORE_ID. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12412 6f19259b-4bc3-4df7-8a09-765794883524
73 lines
2.4 KiB
NASM
73 lines
2.4 KiB
NASM
//
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// Copyright (c) 2011, ARM Limited. All rights reserved.
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//
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// This program and the accompanying materials
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// are licensed and made available under the terms and conditions of the BSD License
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// which accompanies this distribution. The full text of the license may be found at
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// http://opensource.org/licenses/bsd-license.php
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//
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// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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//
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//
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#include <AsmMacroIoLib.h>
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#include <Base.h>
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#include <Library/PcdLib.h>
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#include <AutoGen.h>
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INCLUDE AsmMacroIoLib.inc
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IMPORT CEntryPoint
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IMPORT ArmReadMpidr
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EXPORT _ModuleEntryPoint
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PRESERVE8
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AREA PrePeiCoreEntryPoint, CODE, READONLY
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StartupAddr DCD CEntryPoint
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_ModuleEntryPoint
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// Identify CPU ID
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bl ArmReadMpidr
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// Get ID of this CPU in Multicore system
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LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCoreMask), r1)
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and r0, r0, r1
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_SetupStack
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// Setup Stack for the 4 CPU cores
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackBase), r1)
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackSize), r2)
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mov r3, r0 // r3 = core_id
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mul r3, r3, r2 // r3 = core_id * stack_size = offset from the stack base
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add r3, r3, r1 // r3 = stack_base + offset
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add r3, r3, r2, LSR #1 // r3 = stack_offset + (stack_size/2) <-- the top half is for the heap
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mov sp, r3
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// Only allocate memory in top of the primary core stack
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cmp r0, #0
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bne _PrepareArguments
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_AllocateGlobalPeiVariables
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// Reserve top of the stack for Global PEI Variables (eg: PeiServicesTablePointer)
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LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r1)
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sub sp, sp, r1
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_PrepareArguments
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// The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector
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LoadConstantToReg (FixedPcdGet32(PcdNormalFvBaseAddress), r2)
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add r2, r2, #4
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ldr r1, [r2]
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// move sec startup address into a data register
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// ensure we're jumping to FV version of the code (not boot remapped alias)
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ldr r2, StartupAddr
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// jump to PrePeiCore C code
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// r0 = mp_id
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// r1 = pei_core_address
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blx r2
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END
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