// Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// e32\nkern\arm\nk_entry.cia

// 

//

#include <e32cia.h>

#include <arm.h>

#include "nk_priv.h"

#include "entry.h"

#ifndef	EKA2_ENTRY_POINT_VERSION_IDENTIFIER

#define	EKA2_ENTRY_POINT_VERSION_IDENTIFIER	\

	asm("tst pc, #%a0" : : "i" ((TInt)0) )

#endif

extern "C" {

extern void HwInit0();

extern void KernelMain();

extern TLinAddr RomHeaderAddress;

extern TLinAddr SuperPageAddress;

/*

 * The main startup program

 * aRomHeader is address of ROM header passed in by bootstrap

 * aSuperPage is address of super page passed in by bootstrap

 *

 * *** NOTE ***

 * This is written in assembler in order that nk_exe.lib can be built entirely

 * from one source file. This is necessary to ensure that the vector table above

 * appears at the very beginning of the ekern.exe code section.

 * ************

 */

#if defined(__GCC32__)

GLDEF_C __NAKED__ void _E32Startup(TLinAddr /*aRomHeader*/, TLinAddr /*aSuperPage*/)

	{

	EKA2_ENTRY_POINT_VERSION_IDENTIFIER;	// DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT

	asm("ldr r2, __RomHeaderAddress ");

	asm("b 1f ");				// branch over space for unique ID

	asm(".word 0 ");			// loader will replace with code seg unique ID

								// for RAM-loaded code segment

								// MUST BE AT OFFSET 12 FROM ENTRY POINT

	asm("1: ");

	asm("ldr r3, __SuperPage ");

	asm("str r0, [r2] ");

	asm("str r1, [r3] ");

	asm("bl HwInit0 ");

	asm("ldr r4, __CtorList ");

	asm("1: ");

	asm("ldr r0, [r4, #4]! ");

	asm("adr lr, 1b ");

	asm("cmp r0, #0 ");

	__JUMP(ne,r0);

	asm("b KernelMain ");

	asm("__RomHeaderAddress: ");

	asm(".word RomHeaderAddress ");

	asm("__SuperPage: ");

	asm(".word SuperPageAddress ");

	asm("__CtorList: ");

	asm(".word __CTOR_LIST__ ");

	}

#elif defined(__EABI__)

void __DLL_Export_Table__(void);

void __cpp_initialize__aeabi_();

// The compiler generates calls to this when it reckons a top-level construction

// needs destruction. But the kernel never will need this so, define it as a nop

void __record_needed_destruction (void * d){}

// 2.1 calls __aeabi_atexit passing __dso_handle. This can be a dummy (i.e. just a label)

__NAKED__  void __dso_handle(void) {}

void __aeabi_atexit(void *object, void (*dtor)(void *), void *handle){}

void _E32Startup_Body(TLinAddr aRomHeader, TLinAddr aSuperPage);

__NAKED__ void _E32Startup(TLinAddr aRomHeader, TLinAddr aSuperPage)

	{

	EKA2_ENTRY_POINT_VERSION_IDENTIFIER;	// DUMMY INSTRUCTION TO INDICATE EKA2 ENTRY POINT

	asm("b _E32Startup_Body ");

	asm(".word 0 ");			// padding

	asm(".word 0 ");			// loader will replace with code seg unique ID

								// for RAM-loaded code segment

								// MUST BE AT OFFSET 12 FROM ENTRY POINT

	}

GLDEF_C void _E32Startup_Body(TLinAddr aRomHeader, TLinAddr aSuperPage)

	{

	RomHeaderAddress = aRomHeader;

	SuperPageAddress = aSuperPage;

	HwInit0();

	// RVCT specific initialization

	// Make sure we get an export table

	__DLL_Export_Table__();

	// Initialise static data

	__cpp_initialize__aeabi_();

	KernelMain();

	}

#else

#error Not supported

#endif

}