// 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\nkernsmp\arm\ncutils.cia

// 

//

#include <e32cia.h>

#include <arm.h>

#include <arm_gic.h>

extern TSpinLock BTraceLock;

extern "C" {

extern TUint32 CrashStateOut;

extern SFullArmRegSet DefaultRegSet;

}

//#define __DBG_MON_FAULT__

//#define __RAM_LOADED_CODE__

//#define __EARLY_DEBUG__

#ifdef _DEBUG

#define ASM_KILL_LINK(rp,rs)	asm("mov "#rs", #0xdf ");\

								asm("orr "#rs", "#rs", "#rs", lsl #8 ");\

								asm("orr "#rs", "#rs", "#rs", lsl #16 ");\

								asm("str "#rs", ["#rp"] ");\

								asm("str "#rs", ["#rp", #4] ");

#else

#define ASM_KILL_LINK(rp,rs)

#endif

#ifdef __PRI_LIST_MACHINE_CODED__

/** Return the priority of the highest priority item present on a priority list.

	@return	The highest priority present or -1 if the list is empty.

 */

EXPORT_C __NAKED__ TInt TPriListBase::HighestPriority()

	{

	asm("ldr r2, [r0, #4] ");				// r2=iPresent MSW

	asm("ldr r1, [r0, #0] ");				// r1=iPresent LSW

	CLZ(0,2);								// r0=31-MSB(r2)

	asm("subs r0, r0, #32 ");				// r0=-1-MSB(r2), 0 if r2=0

	CLZcc(CC_EQ,0,1);						// if r2=0, r0=31-MSB(r1)

	asm("rsb r0, r0, #31 ");				// r0=highest priority

	__JUMP(,lr);

	}

/** Find the highest priority item present on a priority list.

	If multiple items at the same priority are present, return the first to be

	added in chronological order.

	@return	a pointer to the item or NULL if the list is empty.

 */

EXPORT_C __NAKED__ TPriListLink* TPriListBase::First()

	{

	asm("ldr r2, [r0, #4] ");				// r2=iPresent MSW

	asm("ldr r1, [r0], #8 ");				// r1=iPresent LSW, r0=&iQueue[0]

	CLZ(3,2);								// r3=31-MSB(r2)

	asm("subs r3, r3, #32 ");				// r3=-1-MSB(r2), 0 if r2=0

	CLZcc(CC_EQ,3,1);						// if r2=0, r3=31-MSB(r1)

	asm("rsbs r3, r3, #31 ");				// r3=highest priority

	asm("ldrpl r0, [r0, r3, lsl #2] ");		// if r3>=0 list is nonempty, r0->first entry

	asm("movmi r0, #0 ");					// if r3<0 list empty, return NULL

	__JUMP(,lr);

	}

/** Add an item to a priority list.

	@param aLink = a pointer to the item - must not be NULL

 */

EXPORT_C __NAKED__ void TPriListBase::Add(TPriListLink* /*aLink*/)

	{

	asm("ldrb r2, [r1, #8]" );				// r2=priority of aLink

	asm("add ip, r0, #8 ");					// ip=&iQueue[0]

	asm("ldr r3, [ip, r2, lsl #2]! ");		// r3->first entry at this priority

	asm("cmp r3, #0 ");						// is this first entry at this priority?

	asm("bne pri_list_add_1 ");				// branch if not

	asm("str r1, [ip] ");					// if queue originally empty, iQueue[pri]=aThread

	asm("ldrb ip, [r0, r2, lsr #3]! ");		// ip=relevant byte of present mask, r0->same

	asm("and r2, r2, #7 ");

	asm("mov r3, #1 ");

	asm("str r1, [r1, #0] ");				// aThread->next=aThread

	asm("orr ip, ip, r3, lsl r2 ");			// ip |= 1<<(pri&7)

	asm("str r1, [r1, #4] ");				// aThread->iPrev=aThread

	asm("strb ip, [r0] ");					// update relevant byte of present mask

	__JUMP(,lr);

	asm("pri_list_add_1: ");

	asm("ldr ip, [r3, #4] ");				// if nonempty, ip=last

	asm("str r1, [r3, #4] ");				// first->prev=aThread

	asm("stmia r1, {r3,ip} ");				// aThread->next=r3=first, aThread->prev=ip=last

	asm("str r1, [ip, #0] ");				// last->next=aThread

	__JUMP(,lr);

	}

/** Removes an item from a priority list.

	@param aLink A pointer to the item - this must not be NULL.

 */

EXPORT_C __NAKED__ void TPriListBase::Remove(TPriListLink* /*aLink*/)

	{

	asm("ldmia r1, {r2,r3} ");				// r2=aLink->iNext, r3=aLink->iPrev

	ASM_KILL_LINK(r1,r12);

	asm("subs r12, r1, r2 ");				// check if more threads at this priority, r12=0 if not

	asm("bne 1f ");							// branch if there are more at same priority

	asm("ldrb r2, [r1, #%a0]" : : "i" _FOFF(NThread, iPriority));	// r2=thread priority

	asm("add r1, r0, #%a0" : : "i" _FOFF(TPriListBase, iQueue));	// r1->iQueue[0]

	asm("str r12, [r1, r2, lsl #2] ");		// iQueue[priority]=NULL

	asm("ldrb r1, [r0, r2, lsr #3] ");		// r1=relevant byte in present mask

	asm("and r3, r2, #7 ");					// r3=priority & 7

	asm("mov r12, #1 ");

	asm("bic r1, r1, r12, lsl r3 ");		// clear bit in present mask

	asm("strb r1, [r0, r2, lsr #3] ");		// update relevant byte in present mask

	__JUMP(,lr);

	asm("1: ");								// get here if there are other threads at same priority

	asm("ldrb r12, [r1, #%a0]" : : "i" _FOFF(NThread, iPriority));	// r12=thread priority

	asm("add r0, r0, #%a0" : : "i" _FOFF(TPriListBase, iQueue));		// r0=&iQueue[0]

	asm("str r3, [r2, #4] ");				// next->prev=prev

	asm("ldr r12, [r0, r12, lsl #2]! ");	// r12=iQueue[priority], r0=&iQueue[priority]

	asm("str r2, [r3, #0] ");				// and prev->next=next

	asm("cmp r12, r1 ");					// if aThread was first...

	asm("streq r2, [r0, #0] ");				// iQueue[priority]=aThread->next

	__JUMP(,lr);							// finished

	}

/** Change the priority of an item on a priority list

	@param	aLink = pointer to the item to act on - must not be NULL

	@param	aNewPriority = new priority for the item

 */

EXPORT_C __NAKED__ void TPriListBase::ChangePriority(TPriListLink* /*aLink*/, TInt /*aNewPriority*/)

	{

	asm("ldrb r3, [r1, #8] ");				// r3=old priority

	asm("stmfd sp!, {r4-r6,lr} ");

	asm("cmp r3, r2 ");

	asm("ldmeqfd sp!, {r4-r6,pc} ");		// if old priority=new, finished

	asm("ldmia r1, {r4,r12} ");				// r4=next, r12=prev

	asm("ldmia r0!, {r6,lr} ");				// lr:r6=present mask, r0=&iQueue[0]

	asm("subs r5, r4, r1 ");				// check if aLink is only one at that priority, r5=0 if it is

	asm("beq change_pri_1 ");				// branch if it is

	asm("ldr r5, [r0, r3, lsl #2] ");		// r5=iQueue[old priority]

	asm("str r4, [r12, #0] ");				// prev->next=next

	asm("str r12, [r4, #4] ");				// next->prev=prev

	asm("cmp r5, r1 ");						// was aLink first?

	asm("streq r4, [r0, r3, lsl #2] ");		// if it was, iQueue[old priority]=aLink->next

	asm("b change_pri_2 ");

	asm("change_pri_1: ");

	asm("str r5, [r0, r3, lsl #2] ");		// if empty, set iQueue[old priority]=NULL

	asm("mov r12, #0x80000000 ");

	asm("rsbs r3, r3, #31 ");				// r3=31-priority

	asm("bicmi lr, lr, r12, ror r3 ");		// if pri>31, clear bit is MS word

	asm("bicpl r6, r6, r12, ror r3 ");		// if pri<=31, clear bit in LS word

	asm("change_pri_2: ");

	asm("ldr r4, [r0, r2, lsl #2] ");		// r4=iQueue[new priority]

	asm("strb r2, [r1, #8] ");				// store new priority

	asm("cmp r4, #0 ");						// new priority queue empty?

	asm("bne change_pri_3 ");				// branch if not

	asm("str r1, [r0, r2, lsl #2] ");		// if new priority queue was empty, iQueue[new p]=aLink

	asm("mov r12, #0x80000000 ");

	asm("str r1, [r1, #0] ");				// aLink->next=aLink

	asm("rsbs r2, r2, #31 ");				// r2=31-priority

	asm("str r1, [r1, #4] ");				// aLink->prev=aLink

	asm("orrmi lr, lr, r12, ror r2 ");		// if pri>31, set bit is MS word

	asm("orrpl r6, r6, r12, ror r2 ");		// if pri<=31, set bit in LS word

	asm("stmdb r0!, {r6,lr} ");				// store present mask and restore r0

	asm("ldmfd sp!, {r4-r6,pc} ");

	asm("change_pri_3: ");

	asm("ldr r12, [r4, #4] ");				// r12->last link at this priority

	asm("str r1, [r4, #4] ");				// first->prev=aLink

	asm("str r1, [r12, #0] ");				// old last->next=aLink

	asm("stmia r1, {r4,r12} ");				// aLink->next=r3=first, aLink->prev=r12=old last

	asm("stmdb r0!, {r6,lr} ");				// store present mask and restore r0

	asm("ldmfd sp!, {r4-r6,pc} ");

	}

#endif

__NAKED__ void initialiseState(TInt /*aCpu*/, TSubScheduler* /*aSS*/)

	{

	SET_RWNO_TID(,r1);

	__ASM_CLI_MODE(MODE_ABT);

	asm("str	sp, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iAbtStackTop));

	asm("mvn	r3, #0 ");

	asm("str	r3, [sp, #%a0]" : : "i" _FOFF(SFullArmRegSet, iExcCode));

	asm("str	r3, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iIrqNestCount));

	__ASM_CLI_MODE(MODE_UND);

	asm("str	sp, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iUndStackTop));

	__ASM_CLI_MODE(MODE_FIQ);

	asm("str	sp, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iFiqStackTop));

	__ASM_CLI_MODE(MODE_IRQ);

	asm("str	sp, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iIrqStackTop));

	__ASM_CLI_MODE(MODE_SVC);

	asm("ldr	r2, __TheScheduler ");

	asm("ldr	r3, [r2, #%a0]" : : "i" _FOFF(TScheduler, iSX.iScuAddr));

	asm("str	r3, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iScuAddr));

	asm("ldr	r3, [r2, #%a0]" : : "i" _FOFF(TScheduler, iSX.iGicDistAddr));

	asm("str	r3, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iGicDistAddr));

	asm("ldr	r3, [r2, #%a0]" : : "i" _FOFF(TScheduler, iSX.iGicCpuIfcAddr));

	asm("str	r3, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iGicCpuIfcAddr));

	asm("ldr	r3, [r2, #%a0]" : : "i" _FOFF(TScheduler, iSX.iLocalTimerAddr));

	asm("str	r3, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iLocalTimerAddr));

	asm("ldr	r3, [r2, #%a0]" : : "i" _FOFF(TScheduler, iSX.iGlobalTimerAddr));

	asm("str	r3, [r1, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iGlobalTimerAddr));

	asm("mov	r3, #0 ");

	SET_RWRO_TID(,r3);

	SET_RWRW_TID(,r3);

	__JUMP(,lr);

	asm("__TheScheduler: ");

	asm(".word TheScheduler ");

	}

__NAKED__ TUint32 __mpid()

	{

	asm("mrc	p15, 0, r0, c0, c0, 5 ");

	__JUMP(,lr);

	}

/** @internalTechnology

	Called to indicate that the system has crashed and all CPUs should be

	halted and should dump their registers.

*/

__NAKED__ void NKern::NotifyCrash(const TAny* /*a0*/, TInt /*a1*/)

	{

	asm("stmfd	sp!, {r0-r1} ");			// save parameters

	GET_RWNO_TID(,r0);

	asm("cmp	r0, #0 ");

	asm("ldreq	r0, __SS0 ");

	asm("ldr	r0, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iRegs));

	asm("cmp	r0, #0 ");

	asm("ldreq	r0, __DefaultRegs ");

	asm("ldr	r1, [r0, #%a0]" : : "i" _FOFF(SFullArmRegSet, iExcCode));

	asm("cmp	r1, #0 ");					// context already saved?

	asm("bge	state_already_saved ");		// skip if so

	asm("mov	r1, lr ");

	asm("bl "	CSM_ZN3Arm9SaveStateER14SFullArmRegSet );

	asm("str	r1, [r0, #%a0]" : : "i" _FOFF(SFullArmRegSet, iN.iR15));

	asm("ldmia	sp!, {r2-r3} ");			// original R0,R1

	asm("stmia	r0, {r2-r3} ");				// save original R0,R1

	asm("add	r1, r0, #%a0" : : "i" _FOFF(SFullArmRegSet, iExcCode));

	asm("mov	r4, r0 ");					// save pointer to i_Regs

	asm("stmib	r1, {r2-r3} ");				// save a0, a1 in iCrashArgs

	asm("mov	r1, #13 ");					// r1 = regnum

	asm("mrs	r2, cpsr ");				// r2 = mode

	asm("bl "	CSM_ZN3Arm3RegER14SFullArmRegSetim );	// r0 = pointer to exception mode R13

	asm("str	sp, [r0] ");				// save correct original value for exception mode R13

	asm("b		state_save_complete ");

	asm("state_already_saved: ");

	asm("ldmia	sp!, {r2-r3} ");			// original R0,R1

	asm("add	r1, r0, #%a0" : : "i" _FOFF(SFullArmRegSet, iExcCode));

	asm("ldr	r4, [r1, #4]! ");

	asm("cmp	r4, #0 ");

	asm("stmeqia	r1, {r2-r3} ");			// save a0, a1 in iCrashArgs, provided iCrashArgs not already set

	asm("mov	r4, r0 ");					// save pointer to i_Regs

	asm("state_save_complete: ");

	__ASM_CLI_MODE(MODE_FIQ);				// mode_fiq, interrupts off

	GET_RWNO_TID(,r0);

	asm("ldr	r1, __CrashState ");

	asm("cmp	r0, #0 ");

	asm("moveq	r2, #1 ");

	asm("streq	r2, [r1] ");

	asm("beq	skip_other_cores ");		// If subscheduler not yet set, don't bother with other cores

	asm("ldr	r2, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iCpuMask));

	asm("ldr	r5, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iGicCpuIfcAddr));

//	asm("ldr	r4, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iRegs));

	asm("bic	sp, sp, #4 ");				// align stack to multiple of 8

	__DATA_MEMORY_BARRIER_Z__(r6);

	asm("1: ");

	LDREX(3,1);

	asm("orr	r5, r3, r2 ");

	STREX(12,5,1);							// set bit in CrashState for this CPU

	asm("cmp	r12, #0 ");

	asm("bne	1b ");

	__DATA_MEMORY_BARRIER__(r6);

	asm("cmp	r3, #0 ");					// were we first to crash?

	asm("beq	first_to_crash ");			// branch if so

	// we weren't first to crash, so wait here for a crash IPI

	// disable all interrupts except for CRASH_IPI

	GET_RWNO_TID(,r0);

	asm("ldr	r0, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iGicCpuIfcAddr));

	asm("mov	r1, #0 ");

	asm("1: ");

	asm("add	r1, r1, #1 ");

	asm("str	r1, [r0, #%a0]" : : "i" _FOFF(GicCpuIfc, iPriMask));

	__DATA_SYNC_BARRIER__(r6);

	asm("ldr	r2, [r0, #%a0]" : : "i" _FOFF(GicCpuIfc, iPriMask));

	asm("cmp	r2, #0 ");

	asm("beq	1b ");						// loop until priority mask is nonzero

	asm("2: ");

	__ASM_STI_MODE(MODE_ABT);

	ARM_WFE;

	asm("b		2b ");						// loop until we get a CRASH_IPI

	// This CPU was first to crash

	asm("first_to_crash: ");

	asm("ldr	r2, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iScheduler));

	asm("ldr	r7, __CrashStateOut ");

	asm("ldr	r3, [r2, #%a0]" : : "i" _FOFF(TScheduler, iIpiAcceptCpus));

	asm("str	r3, [r7] ");			// mask of CPUs pending

	asm("ldr	r5, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iSSX.iGicDistAddr));

	asm("ldr	r1, __CrashIPIWord ");

	__DATA_SYNC_BARRIER_Z__(r6);

	asm("str	r1, [r5, #%a0]" : : "i" _FOFF(GicDistributor, iSoftIrq));	// send CRASH_IPI to all other CPUs

	__DATA_SYNC_BARRIER__(r6);

	asm("skip_other_cores: ");

	asm("mov	r0, #0 ");

	asm("mov	r1, #0 ");

	asm("mov	r2, #0 ");

	asm("bl		NKCrashHandler ");		// call NKCrashHandler(0,0,0)

	__DATA_SYNC_BARRIER__(r6);

	GET_RWNO_TID(,r0);

	asm("cmp	r0, #0 ");

	asm("beq	skip_other_cores2 ");	// If subscheduler not yet set, don't bother with other cores

	asm("ldr	r2, [r0, #%a0]" : : "i" _FOFF(TSubScheduler, iCpuMask));

	asm("7: ");

	LDREX(1,7);

	asm("bic	r1, r1, r2 ");

	STREX(3,1,7);						// atomic { CrashStateOut &= ~iCpuMask; }

	asm("cmp	r3, #0 ");

	asm("bne	7b ");

	asm("1: ");

	asm("ldr	r1, [r7] ");

	asm("cmp	r1, #0 ");				// wait for all CPUs to acknowledge

	asm("beq	2f ");

	asm("adds	r6, r6, #1 ");

	asm("bne	1b ");					// if not ACKed after 2^32 iterations give up waiting

	asm("2: ");

	__DATA_MEMORY_BARRIER_Z__(r0);

	asm("skip_other_cores2: ");

	asm("mov	r0, #1 ");

	asm("ldr	r1, [r4, #%a0] " : : "i" _FOFF(SFullArmRegSet,iN.iR0));	// original R0 = a0 parameter

	asm("ldr	r2, [r4, #%a0] " : : "i" _FOFF(SFullArmRegSet,iN.iR1));	// original R1 = a1 parameter

	asm("bl		NKCrashHandler ");		// call NKCrashHandler(1,a0,a1) - shouldn't return

	// shouldn't get back here

	__ASM_CRASH();

	asm("__CrashState: ");

	asm(".word %a0" : : "i" ((TInt)&CrashState));

	asm("__CrashStateOut: ");

	asm(".word CrashStateOut ");

	asm("__CrashIPIWord: ");

	asm(".word %a0" : : "i" ( (TInt)GIC_IPI_OTHERS(CRASH_IPI_VECTOR) ));

	asm("__SS0: ");

	asm(".word %a0" : : "i" ((TInt)&TheSubSchedulers[0]));

	asm("__DefaultRegs: ");

	asm(".word %a0" : : "i" ((TInt)&DefaultRegSet));

	}

#ifdef __USE_BTRACE_LOCK__

#define	__ASM_ACQUIRE_BTRACE_LOCK(regs)					\

	asm("stmfd sp!, " regs);							\

	asm("ldr r0, __BTraceLock ");						\

	asm("bl " CSM_ZN9TSpinLock11LockIrqSaveEv );		\

	asm("mov r4, r0 ");									\

	asm("ldmfd sp!, " regs)

#define	__ASM_RELEASE_BTRACE_LOCK()						\

	asm("stmfd sp!, {r0-r1} ");							\

	asm("ldr r0, __BTraceLock ");						\

	asm("mov r1, r4 ");									\

	asm("bl " CSM_ZN9TSpinLock16UnlockIrqRestoreEi );	\

	asm("ldmfd sp!, {r0-r1} ")

#else

#define	__ASM_ACQUIRE_BTRACE_LOCK(regs)

#define	__ASM_RELEASE_BTRACE_LOCK()

#endif

__NAKED__ EXPORT_C TBool BTrace::Out(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)

	{

	asm("stmdb	sp!, {r2,r3,r4,lr}");

	__ASM_ACQUIRE_BTRACE_LOCK("{r0-r1}");

	asm("ldr	r12, __BTraceData");

	asm("and	r2, r0, #%a0" : : "i" ((TInt)(0xff<<(BTrace::ECategoryIndex*8))));

	asm("mov	r3, r1");			// r3 = a1 (ready for call to handler)

	asm("ldrb	r2, [r12, r2, lsr #%a0]" : : "i" ((TInt)(BTrace::ECategoryIndex*8)));

	asm("ldr	r12, [r12, #%a0]" : : "i" _FOFF(SBTraceData,iHandler));

	asm("adr	lr, 9f");

	asm("cmp	r2, #0");

	asm("moveq	r0, #0");

	__JUMP(ne,	r12);

	asm("9: ");

	__ASM_RELEASE_BTRACE_LOCK();

	__POPRET("r2,r3,r4,");

	}

__NAKED__ EXPORT_C TBool BTrace::OutN(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)

	{

	asm("stmdb	sp!, {r2,r3,r4,lr}");

	__ASM_ACQUIRE_BTRACE_LOCK("{r0-r3}");

	asm("ldr	r12, __BTraceData");

	asm("and	r2, r0, #%a0" : : "i" ((TInt)(0xff<<(BTrace::ECategoryIndex*8))));

	asm("ldr	r14, [sp, #16]");	// r14 = aDataSize

	asm("ldrb	r2, [r12, r2, lsr #%a0]" : : "i" ((TInt)(BTrace::ECategoryIndex*8)));

	asm("ldr	r12, [r12, #%a0]" : : "i" _FOFF(SBTraceData,iHandler));

	asm("cmp	r2, #0");

	asm("moveq	r0, #0");

	asm("beq	0f ");

	asm("cmp	r14, #%a0" : : "i" ((TInt)KMaxBTraceDataArray));

	asm("movhi	r14, #%a0" : : "i" ((TInt)KMaxBTraceDataArray));

 	asm("orrhi	r0, r0, #%a0" : : "i" ((TInt)(BTrace::ERecordTruncated<<(BTrace::EFlagsIndex*8))));

	asm("add	r0, r0, r14");

	asm("subs	r14, r14, #1");

	asm("ldrhs	r2, [r3]");			// get first word of aData is aDataSize!=0

	asm("mov	r3, r1");			// r3 = a1 (ready for call to handler)

	asm("cmp	r14, #4");

	asm("strlo	r2, [sp, #4]");		// replace aData with first word if aDataSize is 1-4

	asm("mov	lr, pc");

	__JUMP(,	r12);

	asm("0: ");

	__ASM_RELEASE_BTRACE_LOCK();

	__POPRET("r2,r3,r4,");

	}

__NAKED__ EXPORT_C TBool BTrace::OutX(TUint32 a0, TUint32 a1, TUint32 a2, TUint32 a3)

	{

	asm("stmdb	sp!, {r2,r3,r4,lr}");

	__ASM_ACQUIRE_BTRACE_LOCK("{r0-r1}");

	asm("ldr	r12, __BTraceData");

	asm("and	r2, r0, #%a0" : : "i" ((TInt)(0xff<<(BTrace::ECategoryIndex*8))));

	asm("mov	r3, r1");			// r3 = a1 (ready for call to handler)

	asm("ldrb	r2, [r12, r2, lsr #%a0]" : : "i" ((TInt)(BTrace::ECategoryIndex*8)));

	asm("mrs	r14, cpsr ");

	asm("ldr	r12, [r12, #%a0]" : : "i" _FOFF(SBTraceData,iHandler));

	asm("cmp	r2, #0");			// check category filter

	asm("moveq	r0, #0");

	asm("beq	0f ");				// if category disabled, exit now

	__ASM_CLI();

	asm("and	r2, r14, #0x0f ");

	asm("cmp	r2, #3 ");

	asm("movhi	r2, #2 ");			// r2 = context ID = 1 for FIQ, 2 for IRQ/ABT/UND/SYS

	asm("bne	1f ");

	GET_RWNO_TID(,r1);

	asm("movs   r2, r1 ");			// r2 = context ID = 0 for early boot, no threads

	asm("beq    1f ");

	asm("ldrb	r2, [r1, #%a0]" : : "i" _FOFF(TSubScheduler,iInIDFC));

	asm("cmp	r2, #0 ");

	asm("ldreq	r2, [r1, #%a0]" : : "i" _FOFF(TSubScheduler,iCurrentThread));

	asm("movne	r2, #3 ");			// r2 = context ID = 3 for IDFC = NThread pointer for thread

	asm("1: ");

	asm("msr	cpsr, r14 ");

	asm("mov	lr, pc");

	__JUMP(,	r12);

	asm("0: ");

	__ASM_RELEASE_BTRACE_LOCK();

	__POPRET("r2,r3,r4,");

	}

__NAKED__ EXPORT_C TBool BTrace::OutNX(TUint32 a0, TUint32 a1, TUint32 a2, const TAny* aData, TInt aDataSize)

	{

	asm("stmdb	sp!, {r2,r3,r4,lr}");

	__ASM_ACQUIRE_BTRACE_LOCK("{r0-r3}");

	asm("ldr	r12, __BTraceData");

	asm("and	r2, r0, #%a0" : : "i" ((TInt)(0xff<<(BTrace::ECategoryIndex*8))));

	asm("ldr	r14, [sp, #16]");	// r14 = aDataSize

	asm("ldrb	r2, [r12, r2, lsr #%a0]" : : "i" ((TInt)(BTrace::ECategoryIndex*8)));

	asm("ldr	r12, [r12, #%a0]" : : "i" _FOFF(SBTraceData,iHandler));

	asm("cmp	r2, #0");			// check category filter

	asm("moveq	r0, #0");

	asm("beq	0f ");				// if category disabled, exit now

	asm("cmp	r14, #%a0" : : "i" ((TInt)KMaxBTraceDataArray));

	asm("movhi	r14, #%a0" : : "i" ((TInt)KMaxBTraceDataArray));

 	asm("orrhi	r0, r0, #%a0" : : "i" ((TInt)(BTrace::ERecordTruncated<<(BTrace::EFlagsIndex*8))));

	asm("add	r0, r0, r14");

	asm("subs	r14, r14, #1");

	asm("ldrhs	r2, [r3]");			// get first word of aData is aDataSize!=0

	asm("mov	r3, r1");			// r3 = a1 (ready for call to handler)

	asm("cmp	r14, #4");

	asm("strlo	r2, [sp, #4]");		// replace aData with first word if aDataSize is 1-4

	asm("mrs	r14, cpsr ");

	__ASM_CLI();

	asm("and	r2, r14, #0x0f ");

	asm("cmp	r2, #3 ");

	asm("movhi	r2, #2 ");			// r2 = context ID = 1 for FIQ, 2 for IRQ/ABT/UND/SYS

	asm("bne	1f ");

	GET_RWNO_TID(,r1);

	asm("movs   r2, r1 ");			// r2 = context ID = 0 for early boot, no threads

	asm("beq    1f ");

	asm("ldrb	r2, [r1, #%a0]" : : "i" _FOFF(TSubScheduler,iInIDFC));

	asm("cmp	r2, #0 ");

	asm("ldreq	r2, [r1, #%a0]" : : "i" _FOFF(TSubScheduler,iCurrentThread));

	asm("movne	r2, #3 ");			// r2 = context ID = 3 for IDFC = NThread pointer for thread

	asm("1: ");

	asm("msr	cpsr, r14 ");

	asm("mov	lr, pc");

	__JUMP(,	r12);

	asm("0: ");

	__ASM_RELEASE_BTRACE_LOCK();

	__POPRET("r2,r3,r4,");

	}

__NAKED__ EXPORT_C TBool BTrace::OutBig(TUint32 a0, TUint32 a1, const TAny* aData, TInt aDataSize)

	{

	asm("stmdb	sp!, {r4,lr}");

	asm("ldr	r12, __BTraceData");