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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
#global symbols referenced by this module
GCC_ASM_IMPORT(CEntryPoint)
StartupAddr: .word CEntryPoint
#make _ModuleEntryPoint as global
GCC_ASM_EXPORT(_ModuleEntryPoint)
ASM_PFX(_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
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