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
117 lines
3.6 KiB
ArmAsm
117 lines
3.6 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# ARM VE Entry point. Reset vector in FV header will brach to
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# _ModuleEntryPoint.
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#
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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 <Library/ArmPlatformLib.h>
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#include <AutoGen.h>
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#Start of Code section
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.text
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.align 3
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#make _ModuleEntryPoint as global
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GCC_ASM_EXPORT(_ModuleEntryPoint)
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#global functions referenced by this module
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GCC_ASM_IMPORT(CEntryPoint)
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GCC_ASM_IMPORT(ArmPlatformIsMemoryInitialized)
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GCC_ASM_IMPORT(ArmPlatformInitializeBootMemory)
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GCC_ASM_IMPORT(ArmDisableInterrupts)
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GCC_ASM_IMPORT(ArmDisableCachesAndMmu)
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GCC_ASM_IMPORT(ArmWriteVBar)
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GCC_ASM_IMPORT(ArmReadMpidr)
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GCC_ASM_IMPORT(SecVectorTable)
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#if (FixedPcdGet32(PcdMPCoreSupport))
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GCC_ASM_IMPORT(ArmIsScuEnable)
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#endif
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StartupAddr: .word ASM_PFX(CEntryPoint)
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SecVectorTableAddr: .word ASM_PFX(SecVectorTable)
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ASM_PFX(_ModuleEntryPoint):
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#Set VBAR to the start of the exception vectors in Secure Mode
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ldr r0, SecVectorTableAddr
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bl ASM_PFX(ArmWriteVBar)
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# First ensure all interrupts are disabled
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bl ASM_PFX(ArmDisableInterrupts)
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# Ensure that the MMU and caches are off
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bl ASM_PFX(ArmDisableCachesAndMmu)
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_IdentifyCpu:
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# Identify CPU ID
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bl ASM_PFX(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 r5, r0, r1
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#get ID of this CPU in Multicore system
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LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r1)
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cmp r5, r1
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# Only the primary core initialize the memory (SMC)
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beq _InitMem
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#if (FixedPcdGet32(PcdMPCoreSupport))
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# ... The secondary cores wait for SCU to be enabled
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_WaitForEnabledScu:
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bl ASM_PFX(ArmIsScuEnable)
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tst r1, #1
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beq _WaitForEnabledScu
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b _SetupStack
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#endif
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_InitMem:
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bl ASM_PFX(ArmPlatformIsMemoryInitialized)
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bne _SetupStack
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# Initialize Init Memory
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bl ASM_PFX(ArmPlatformInitializeBootMemory)
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# Only Primary CPU could run this line (the secondary cores have jumped from _IdentifyCpu to _SetupStack)
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mov r5, #0
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_SetupStack:
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# Setup Stack for the 4 CPU cores
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#Read Stack Base address from PCD
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoresSecStackBase), r1)
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#read Stack size from PCD
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LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecStackSize), r2)
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#calcuate Stack Pointer reg value using Stack size and CPU ID.
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mov r3,r5 @ 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 ldr= stack_base + offset
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mov sp, r3
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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 r3, StartupAddr
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# Move the CoreId in r0 to be the first argument of the SEC Entry Point
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mov r0, r5
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# jump to SEC C code
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# r0 = core_id
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blx r3
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