// 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\common\arm\atomic_8_16_32_exec.h

// 8, 16 and 32 bit user side atomic operations on V5 processors

// These work by calling Exec functions.

// 

//

#include "atomic_ops.h"

#ifdef __CPU_ARMV6

#error 8/16/32 bit atomic operations on ARMv6 must use LDREX/STREX

#else

// Write paging not supported, so atomics can assume unpaged memory, so FAST exec OK

#if __DATA_SIZE__==8

#define	__ATOMIC_EXEC__(op)		FAST_EXEC1_NR(EFastExecFastAtomic##op##8)

#elif __DATA_SIZE__==16

#define	__ATOMIC_EXEC__(op)		FAST_EXEC1_NR(EFastExecFastAtomic##op##16)

#elif __DATA_SIZE__==32

#define	__ATOMIC_EXEC__(op)		FAST_EXEC1_NR(EFastExecFastAtomic##op##32)

#else

#error Invalid data size

#endif

#endif

#ifdef __BARRIERS_NEEDED__

#error Barriers not supported on V6/V5, only V6K/V7

#endif

#if defined(__OP_LOAD__)

#error Load operation not defined

#elif defined(__OP_STORE__)

#error Store operation not defined

#elif defined(__OP_RMW1__)

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,rel,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,rlx,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,ord,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,acq,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=v

	// return value in R0

#if defined(__OP_ADD__)

	asm("stmfd sp!, {r0-r1} ");		// iA=a, i0=v, i1, i2 unused

	asm("mov r0, sp ");

	__ATOMIC_EXEC__(Add);

	asm("add sp, sp, #8 ");

#else

#if defined(__OP_SWP__)

	asm("mov r2, r1 ");				// XOR mask = v

	asm("mov r1, #0 ");				// AND mask = 0

#elif defined(__OP_AND__)

	asm("mov r2, #0 ");				// AND mask = v, XOR mask = 0

#elif defined(__OP_IOR__)

	asm("mov r2, r1 ");				// XOR mask = v

	asm("mvn r1, r1 ");				// AND mask = ~v

#elif defined(__OP_XOR__)

	asm("mov r2, r1 ");				// XOR mask = v

	asm("mvn r1, #0 ");				// AND mask = 0xFFFFFFFF

#endif

	asm("stmfd sp!, {r0-r2} ");		// iA=a, i0=AND mask, i1=XOR mask, i2 unused

	asm("mov r0, sp ");

	__ATOMIC_EXEC__(Axo);

	asm("add sp, sp, #12 ");

#endif

	__JUMP(,lr);

	}

#elif defined(__OP_CAS__)

extern "C" EXPORT_C __NAKED__ TBool __fname__(__OPERATION__,rel,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ * /*q*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=q, R2=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ TBool __fname__(__OPERATION__,rlx,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ * /*q*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=q, R2=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ TBool __fname__(__OPERATION__,ord,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ * /*q*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=q, R2=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ TBool __fname__(__OPERATION__,acq,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ * /*q*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=q, R2=v

	// return value in R0

	asm("stmfd sp!, {r0-r2} ");		// iA=a, iQ=q, i1=v, i2 unused

	asm("mov r0, sp ");

	__ATOMIC_EXEC__(Cas);

	asm("add sp, sp, #12 ");

	__JUMP(,lr);

	}

#elif defined(__OP_AXO__)

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,rel,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=u, R2=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,rlx,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=u, R2=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,ord,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=u, R2=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,acq,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=u, R2=v

	// return value in R0

	asm("stmfd sp!, {r0-r2} ");		// iA=a, i0=u, i1=v, i2 unused

	asm("mov r0, sp ");

	__ATOMIC_EXEC__(Axo);

	asm("add sp, sp, #12 ");

	__JUMP(,lr);

	}

#elif defined(__OP_RMW3__)

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,rel,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*t*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=t, R2=u, R3=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,rlx,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*t*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=t, R2=u, R3=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,ord,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*t*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=t, R2=u, R3=v

	// return value in R0

	// just fall through

	}

extern "C" EXPORT_C __NAKED__ __TYPE__ __fname__(__OPERATION__,acq,__DATA_SIZE__)(volatile TAny* /*a*/, __TYPE__ /*t*/, __TYPE__ /*u*/, __TYPE__ /*v*/)

	{

	// R0=a, R1=t, R2=u, R3=v

	// return value in R0

	asm("stmfd sp!, {r0-r3} ");		// iA=a, i0=t, i1=u, i2=v

	asm("mov r0, sp ");

#if	defined(__OP_TAU__)

	__ATOMIC_EXEC__(Tau);

#elif	defined(__OP_TAS__)

	__ATOMIC_EXEC__(Tas);

#endif

	asm("add sp, sp, #16 ");

	__JUMP(,lr);

	}

#endif

#undef __ATOMIC_EXEC__

// Second inclusion undefines temporaries

#include "atomic_ops.h"