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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>
INCLUDE AsmMacroIoLib.inc
IMPORT CEntryPoint
EXPORT _ModuleEntryPoint
PRESERVE8
AREA PrePeiCoreEntryPoint, CODE, READONLY
StartupAddr DCD CEntryPoint
_ModuleEntryPoint
// Identify CPU ID
mrc p15, 0, r0, c0, c0, 5
and r0, #0xf
_SetupStack
// Setup Stack for the 4 CPU cores
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackBase), r1)
LoadConstantToReg (FixedPcdGet32(PcdCPUCoresNonSecStackSize), r2)
mov r3, r0 // r3 = core_id
mul r3, r3, r2 // r3 = core_id * stack_size = offset from the stack base
add r3, r3, r1 // r3 = stack_base + offset
add r3, r3, r2, LSR #1 // r3 = stack_offset + (stack_size/2) <-- the top half is for the heap
mov sp, r3
// Only allocate memory in top of the primary core stack
cmp r0, #0
bne _PrepareArguments
_AllocateGlobalPeiVariables
// Reserve top of the stack for Global PEI Variables (eg: PeiServicesTablePointer)
LoadConstantToReg (FixedPcdGet32(PcdPeiGlobalVariableSize), r1)
sub sp, sp, r1
_PrepareArguments
// The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector
LoadConstantToReg (FixedPcdGet32(PcdNormalFvBaseAddress), 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 = core_id
// r1 = pei_core_address
blx r2
END
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