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/* -*- mode: C++; tab-width: 4 -*- */
/* ===================================================================== *\
Copyright (c) 1998-2001 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 "EmBankDummy.h"
#include "EmBankDRAM.h" // EmBankDRAM::ValidAddress
#include "EmBankSRAM.h" // EmBankSRAM::GetMemoryStart
#include "EmCPU68K.h" // gCPU68K
#include "EmPalmHeap.h" // EmPalmHeap::GetHeapByPtr
#include "EmMemory.h" // Memory::InitializeBanks
// ===========================================================================
// ¥ Dummy Bank Accessors
// ===========================================================================
// Dummy banks are non-existent blocks of memory. Dummy bank accessors do
// not do anything.
static EmAddressBank gAddressBank =
{
EmBankDummy::GetLong,
EmBankDummy::GetWord,
EmBankDummy::GetByte,
EmBankDummy::SetLong,
EmBankDummy::SetWord,
EmBankDummy::SetByte,
EmBankDummy::GetRealAddress,
EmBankDummy::ValidAddress,
EmBankDummy::GetMetaAddress,
EmBankDummy::AddOpcodeCycles
};
inline Bool HackForHwrGetRAMSize (emuptr address)
{
// if ((address & 0xFF000000) == EmBankSRAM::GetMemoryStart ())
if (address == EmBankSRAM::GetMemoryStart () + gRAMBank_Size)
return true;
return false;
}
/***********************************************************************
*
* FUNCTION: EmBankDummy::Initialize
*
* DESCRIPTION: Standard initialization function. Responsible for
* initializing this sub-system when a new session is
* created. Will be followed by at least one call to
* Reset or Load.
*
* PARAMETERS: None.
*
* RETURNED: Nothing.
*
***********************************************************************/
void EmBankDummy::Initialize (void)
{
}
/***********************************************************************
*
* FUNCTION: EmBankDummy::Reset
*
* DESCRIPTION: Standard reset function. Sets the sub-system to a
* default state. This occurs not only on a Reset (as
* from the menu item), but also when the sub-system
* is first initialized (Reset is called after Initialize)
* as well as when the system is re-loaded from an
* insufficient session file.
*
* PARAMETERS: None.
*
* RETURNED: Nothing.
*
***********************************************************************/
void EmBankDummy::Reset (Bool /*hardwareReset*/)
{
}
/***********************************************************************
*
* FUNCTION: EmBankDummy::Save
*
* DESCRIPTION: Standard save function. Saves any sub-system state to
* the given session file.
*
* PARAMETERS: None.
*
* RETURNED: Nothing.
*
***********************************************************************/
void EmBankDummy::Save (SessionFile&)
{
}
/***********************************************************************
*
* FUNCTION: EmBankDummy::Load
*
* DESCRIPTION: Standard load function. Loads any sub-system state
* from the given session file.
*
* PARAMETERS: None.
*
* RETURNED: Nothing.
*
***********************************************************************/
void EmBankDummy::Load (SessionFile&)
{
}
/***********************************************************************
*
* FUNCTION: EmBankDummy::Dispose
*
* DESCRIPTION: Standard dispose function. Completely release any
* resources acquired or allocated in Initialize and/or
* Load.
*
* PARAMETERS: None.
*
* RETURNED: Nothing.
*
***********************************************************************/
void EmBankDummy::Dispose (void)
{
}
/***********************************************************************
*
* FUNCTION: EmBankDummy::SetBankHandlers
*
* DESCRIPTION: Set the bank handlers UAE uses to dispatch memory
* access operations.
*
* PARAMETERS: None
*
* RETURNED: Nothing
*
***********************************************************************/
void EmBankDummy::SetBankHandlers (void)
{
Memory::InitializeBanks (gAddressBank, 0, 0xFFFF);
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::GetLong
// ---------------------------------------------------------------------------
uint32 EmBankDummy::GetLong (emuptr address)
{
// Hack to keep HwrGetRAMSize working: it runs off
// the end of RAM while testing it.
if (HackForHwrGetRAMSize (address))
return 0;
InvalidAccess (address, sizeof (uint32), true);
return ~0;
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::GetWord
// ---------------------------------------------------------------------------
uint32 EmBankDummy::GetWord (emuptr address)
{
// Hack to keep HwrGetRAMSize working: it runs off
// the end of RAM while testing it.
if (HackForHwrGetRAMSize (address))
return 0;
InvalidAccess (address, sizeof (uint16), true);
return ~0;
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::GetByte
// ---------------------------------------------------------------------------
uint32 EmBankDummy::GetByte (emuptr address)
{
// Hack to keep HwrGetRAMSize working: it runs off
// the end of RAM while testing it.
if (HackForHwrGetRAMSize (address))
return 0;
InvalidAccess (address, sizeof (uint8), true);
return ~0;
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::SetLong
// ---------------------------------------------------------------------------
void EmBankDummy::SetLong (emuptr address, uint32)
{
// Hack to keep HwrGetRAMSize working: it runs off
// the end of RAM while testing it.
if (HackForHwrGetRAMSize (address))
return;
InvalidAccess (address, sizeof (uint32), true);
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::SetWord
// ---------------------------------------------------------------------------
void EmBankDummy::SetWord (emuptr address, uint32)
{
// Hack to keep HwrGetRAMSize working: it runs off
// the end of RAM while testing it.
if (HackForHwrGetRAMSize (address))
return;
InvalidAccess (address, sizeof (uint16), true);
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::SetByte
// ---------------------------------------------------------------------------
void EmBankDummy::SetByte (emuptr address, uint32)
{
// Hack to keep HwrGetRAMSize working: it runs off
// the end of RAM while testing it.
if (HackForHwrGetRAMSize (address))
return;
InvalidAccess (address, sizeof (uint8), true);
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::ValidAddress
// ---------------------------------------------------------------------------
int EmBankDummy::ValidAddress (emuptr, uint32)
{
int result = false;
return result;
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::GetRealAddress
// ---------------------------------------------------------------------------
uint8* EmBankDummy::GetRealAddress (emuptr address)
{
return (uint8*) address;
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::GetMetaAddress
// ---------------------------------------------------------------------------
uint8* EmBankDummy::GetMetaAddress (emuptr address)
{
UNUSED_PARAM(address)
static uint8 dummyBits[4] = {0, 0, 0, 0};
return dummyBits;
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::AddOpcodeCycles
// ---------------------------------------------------------------------------
void EmBankDummy::AddOpcodeCycles (void)
{
}
// ---------------------------------------------------------------------------
// ¥ EmBankDummy::InvalidAccess
// ---------------------------------------------------------------------------
void EmBankDummy::InvalidAccess (emuptr address, long size, Bool forRead)
{
if (CEnableFullAccess::AccessOK ())
return;
EmAssert (gCPU68K);
gCPU68K->BusError (address, size, forRead);
}
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