/* -*- mode: C++; tab-width: 4 -*- */
/* ===================================================================== *\
	Copyright (c) 1999-2001 Palm, Inc. or its subsidiaries.
	All rights reserved.

	This file is part of the Palm OS Emulator.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.
\* ===================================================================== */

#include "EmCommon.h"
#include "EmUAEGlue.h"

#include "EmCPU68K.h"			// ProcessException, etc.
#include "EmSession.h"			// gSession->Reset
#include "Platform.h"			// AllocateMemory
#include "UAE.h"				// MakeSR, uae_s32, etc.


// ---------------------------------------------------------------------------
// Glue functions to bridge from UAE-generated code to the implemenations
// we define.
// ---------------------------------------------------------------------------

void customreset (void)
{
	EmAssert (gSession);

	gSession->ScheduleReset (kResetSoft);
}


void Exception (int nr, emuptr /*oldpc*/)
{
	EmAssert (gCPU68K);

	gCPU68K->ProcessException ((ExceptionNumber) nr);
}


unsigned long op_illg (uint32 iOpcode)
{
	EmAssert (gCPU68K);

	gCPU68K->ProcessIllegalInstruction (iOpcode);
	return 0;
}


void Software_ProcessLINK (int32 linkSize)
{
	EmAssert (gCPU68K);

	gCPU68K->ProcessLINK (linkSize);
}


int Software_ProcessRTS (emuptr dest)
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewPC (dest);
	return gCPU68K->ProcessRTS (dest);
}


int Software_ProcessRTE (emuptr dest)
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewPC (dest);
	return gCPU68K->ProcessRTE (dest);
}


int Software_ProcessJSR (emuptr oldpc, emuptr dest)
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewPC (dest);
	return gCPU68K->ProcessJSR (oldpc, dest);
}


int Software_ProcessJSR_Ind (emuptr oldpc, emuptr dest)
{
	EmAssert (gCPU68K);

	return gCPU68K->ProcessJSR_Ind (oldpc, dest);
}


void Software_CheckNewPC (emuptr dest)
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewPC (dest);
}


void Software_CheckStackPointerAssignment ()
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewSP (kStackPointerChanged);
}


void Software_CheckStackPointerDecrement ()
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewSP (kStackPointerDecremented);
}


void Software_CheckStackPointerIncrement ()
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewSP (kStackPointerIncremented);
}


void Software_CheckKernelStack ()
{
	EmAssert (gCPU68K);

	gCPU68K->CheckNewSP (kStackPointerKernelStackHack);
}


void MakeSR (void)
{
	EmAssert (gCPU68K);

	gCPU68K->UpdateSRFromRegisters ();
}


void MakeFromSR (void)
{
	EmAssert (gCPU68K);

	gCPU68K->UpdateRegistersFromSR ();
}


void* xmalloc (size_t size)
{
	return Platform::AllocateMemory (size);
}

uint32 get_disp_ea_000 (uint32 base, uint32 dp)
{
    int reg = (dp >> 12) & 15;
    uae_s32 regd = regs.regs[reg];

    if ((dp & 0x800) == 0)
		regd = (uae_s32)(uae_s16)regd;

    return base + (uae_s8)dp + regd;
}