// Copyright (c) 1996-2009 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\kernel\arm\k_entry.cia

// 

//

#include <e32cia.h>

#include <kernel/kernel.h>

#include <arm_mem.h>

#include "entry.h"

extern "C" {

extern void KernelMain();

/*

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

	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

	asm("1: ");

	asm("bl " CSM_ZN2PP20InitSuperPageFromRom);

#ifdef	__CPU_HAS_CP15_THREAD_ID_REG

	asm("mov	r0, #0 ");

	SET_RWNO_TID(,r0);			// initialise SubScheduler() pointer to 0

	SET_RWRO_TID(,r0);

	SET_RWRW_TID(,r0);

#endif

	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("__CtorList: ");

	asm(".word __CTOR_LIST__ ");

	}

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)

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		1f ");

	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

	asm("1:		");

#ifdef	__CPU_HAS_CP15_THREAD_ID_REG

	asm("mov	r12, #0 ");

	SET_RWNO_TID(,r12);			// initialise SubScheduler() pointer to 0

	SET_RWRO_TID(,r12);

	SET_RWRW_TID(,r12);

#endif

	asm("b		_E32Startup_Body ");

	}

GLDEF_C void _E32Startup_Body(TLinAddr aRomHeader, TLinAddr aSuperPage)

	{

	PP::InitSuperPageFromRom(aRomHeader, aSuperPage);

	// RVCT-specific initialisation

	// Make sure we get an export table

	__DLL_Export_Table__();

	// Initialise static data

	__cpp_initialize__aeabi_();

	KernelMain();

	}

#else

#error Not supported

#endif

}