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//
// Copyright (c) 2011, 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 <AsmMacroIoLib.h>
#include <Base.h>
#include <Library/PcdLib.h>
#include <AutoGen.h>
.text
.align 3
GCC_ASM_IMPORT(CEntryPoint)
GCC_ASM_IMPORT(ArmReadMpidr)
GCC_ASM_EXPORT(_ModuleEntryPoint)
StartupAddr: .word CEntryPoint
ASM_PFX(_ModuleEntryPoint):
// Identify CPU ID
bl ASM_PFX(ArmReadMpidr)
// Get ID of this CPU in Multicore system
LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCoreMask), r1)
and r0, r0, r1
// Calculate the top of the primary stack
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresStackBase), r1)
LoadConstantToReg (FixedPcdGet32(PcdCPUCorePrimaryStackSize), r2)
add r2, r2, r1
// Is it the Primary Core ?
LoadConstantToReg (FixedPcdGet32(PcdArmPrimaryCore), r1)
cmp r0, r1
beq _SetupPrimaryCoreStack
_SetupSecondaryCoreStack:
// r2 = Top of the primary stack = Base of the Secondary Stacks
// Get the position of the cores (ClusterId * 4) + CoreId
GetCorePositionInStack(r3, r0, r1)
// The stack starts at the top of the stack region. Add '1' to the Core Position to get the top of the stack
add r3, r3, #1
LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecondaryStackSize), r1)
// StackOffset = CorePos * StackSize
mul r3, r3, r1
// SP = StackBase + StackOffset
add sp, r2, r3
b _PrepareArguments
_SetupPrimaryCoreStack:
// r2 = Top of the primary stack
LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r3)
// The reserved space for global variable must be 8-bytes aligned for pushing
// 64-bit variable on the stack
SetPrimaryStack (r2, r3, r1)
// Set all the PEI global variables to 0
mov r3, sp
mov r1, #0x0
_InitGlobals:
cmp r3, r2
beq _PrepareArguments
str r1, [r3], #4
b _InitGlobals
_PrepareArguments:
// The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector
LoadConstantToReg (FixedPcdGet32(PcdFvBaseAddress), r2)
add r2, r2, #4
ldr r1, [r2]
// move sec startup address into a data register
// ensure we're jumping to FV version of the code (not boot remapped alias)
ldr r2, StartupAddr
// jump to PrePeiCore C code
// r0 = mp_id
// r1 = pei_core_address
blx r2
_NeverReturn:
b _NeverReturn
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