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//
// Copyright (c) 2011-2012, ARM 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 <AutoGen.h>
#include <AsmMacroIoLib.h>
#include "SecInternal.h"
.text
.align 3
GCC_ASM_IMPORT(CEntryPoint)
GCC_ASM_IMPORT(ArmPlatformSecBootAction)
GCC_ASM_IMPORT(ArmPlatformSecBootMemoryInit)
GCC_ASM_IMPORT(ArmDisableInterrupts)
GCC_ASM_IMPORT(ArmDisableCachesAndMmu)
GCC_ASM_IMPORT(ArmReadMpidr)
GCC_ASM_IMPORT(ArmCallWFE)
GCC_ASM_EXPORT(_ModuleEntryPoint)
StartupAddr: .word ASM_PFX(CEntryPoint)
ASM_PFX(_ModuleEntryPoint):
// First ensure all interrupts are disabled
bl ASM_PFX(ArmDisableInterrupts)
// Ensure that the MMU and caches are off
bl ASM_PFX(ArmDisableCachesAndMmu)
// By default, we are doing a cold boot
mov r10, #ARM_SEC_COLD_BOOT
// Jump to Platform Specific Boot Action function
blx ASM_PFX(ArmPlatformSecBootAction)
_IdentifyCpu:
// Identify CPU ID
bl ASM_PFX(ArmReadMpidr)
// Get ID of this CPU in Multicore system
LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCoreMask), r1)
and r5, r0, r1
// Is it the Primary Core ?
LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r3)
cmp r5, r3
// Only the primary core initialize the memory (SMC)
beq _InitMem
_WaitInitMem:
// If we are not doing a cold boot in this case we should assume the Initial Memory to be already initialized
// Otherwise we have to wait the Primary Core to finish the initialization
cmp r10, #ARM_SEC_COLD_BOOT
bne _SetupSecondaryCoreStack
// Wait for the primary core to initialize the initial memory (event: BOOT_MEM_INIT)
bl ASM_PFX(ArmCallWFE)
// Now the Init Mem is initialized, we setup the secondary core stacks
b _SetupSecondaryCoreStack
_InitMem:
// If we are not doing a cold boot in this case we should assume the Initial Memory to be already initialized
cmp r10, #ARM_SEC_COLD_BOOT
bne _SetupPrimaryCoreStack
// Initialize Init Boot Memory
bl ASM_PFX(ArmPlatformSecBootMemoryInit)
// Only Primary CPU could run this line (the secondary cores have jumped from _IdentifyCpu to _SetupStack)
LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r5)
_SetupPrimaryCoreStack:
// Get the top of the primary stacks (and the base of the secondary stacks)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresSecStackBase), r1)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecPrimaryStackSize), r2)
add r1, r1, r2
LoadConstantToReg (FixedPcdGet32(PcdSecGlobalVariableSize), r2)
// The reserved space for global variable must be 8-bytes aligned for pushing
// 64-bit variable on the stack
SetPrimaryStack (r1, r2, r3)
b _PrepareArguments
_SetupSecondaryCoreStack:
// Get the top of the primary stacks (and the base of the secondary stacks)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresSecStackBase), r1)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecPrimaryStackSize), r2)
add r1, r1, r2
// Get the Core Position (ClusterId * 4) + CoreId
GetCorePositionFromMpId(r0, r5, r2)
// The stack starts at the top of the stack region. Add '1' to the Core Position to get the top of the stack
add r0, r0, #1
// StackOffset = CorePos * StackSize
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecSecondaryStackSize), r2)
mul r0, r0, r2
// SP = StackBase + StackOffset
add sp, r1, r0
_PrepareArguments:
// Move sec startup address into a data register
// Ensure we're jumping to FV version of the code (not boot remapped alias)
ldr r3, StartupAddr
// Jump to SEC C code
// r0 = mp_id
// r1 = Boot Mode
mov r0, r5
mov r1, r10
blx r3
_NeverReturn:
b _NeverReturn
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