hades.models.mips.mipsmemory
Class TinyBPMemory

java.lang.Object
  hades.models.mips.memory.BreakPointMemory
      hades.models.mips.mipsmemory.TinyBPMemory

All Implemented Interfaces:

Memory, MipsMemory, Resetable

public class TinyBPMemory

extends BreakPointMemory

implements Resetable, MipsMemory

Memory implementation as a simple array with no wait states. The memory is organized in words in order to serve word requests fast.

Field Summary

protected boolean	currentlyReading
protected boolean	debug
protected boolean	finished
protected int	memorySize
protected java.lang.String	name
protected int	nextAdr
protected int	nextData
protected int	result
protected int	totalWaitstates
protected int	waiting
protected int	waitstates

Fields inherited from class hades.models.mips.memory.BreakPointMemory

BP_IDLE, BP_READALL, BP_READVAL, BP_WRITEALL, BP_WRITEVAL, bpHandler, bpHandlerInstalled, mem, readBP, readVal, writeBP, writeVal

Constructor Summary

TinyBPMemory(ResetHandler resetHandler, int newMemorySize, int newWaitstates, java.lang.String newName)
Waitstates are given to test memory accesses with many waitstates.

Method Summary

boolean	beginCycle() beginCycle has to do nothing because this memory doesn?t needs extra cycles for memory access
void	endCycle() end of a cycle, all core actions are done, memory actions can complete
boolean	finished() request end of read or write access
boolean	getHit(int adr) Is data present at the specified address?
boolean	getLog() Get debug mode
int	getMemorySize() Capacity of the memory in words
java.lang.String	getName() get the name of this memory
int	getReadResult() get result
int	getWordWidth() Witdh of one word in bits
void	por() Power on reset or hardware reset
void	read(int adr, boolean burst) Drive busses for read access
int	readMemory(int address) Read a word from the memory
void	reset() software reset
void	setLog(boolean newDebug) Enable or disable logging output
void	setName(java.lang.String newName) Set the name of this memory
java.lang.String	statistics()
void	write(int adr, int data) Drive busses for write access
void	writeMemory(int address, int word) Write a word into the memory

Methods inherited from class hades.models.mips.memory.BreakPointMemory

getMemory, getReadBPMemory, getReadValMemory, getWriteBPMemory, getWriteValMemory, installBreakPointHandler, installEntryHandler, setEntry, setReadBP, setWriteBP

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface hades.models.mips.memory.Memory

installEntryHandler, setEntry

Field Detail

nextAdr

protected int nextAdr

nextData

protected int nextData

result

protected int result

currentlyReading

protected boolean currentlyReading

memorySize

protected int memorySize

waitstates

protected int waitstates

waiting

protected int waiting

finished

protected boolean finished

totalWaitstates

protected int totalWaitstates

name

protected java.lang.String name

debug

protected boolean debug

Constructor Detail

TinyBPMemory

public TinyBPMemory(ResetHandler resetHandler,
                    int newMemorySize,
                    int newWaitstates,
                    java.lang.String newName)

Waitstates are given to test memory accesses with many waitstates. The TinyBPMemory will delay the access as many cycles as waitstates says

Method Detail

por

public void por()

Power on reset or hardware reset

Specified by:

por in interface Resetable

reset

public void reset()

software reset

Specified by:

reset in interface Resetable

beginCycle

public boolean beginCycle()

beginCycle has to do nothing because this memory doesn?t needs extra cycles for memory access

Specified by:

beginCycle in interface MipsMemory

endCycle

public void endCycle()

Description copied from interface: MipsMemory

end of a cycle, all core actions are done, memory actions can complete

Specified by:

endCycle in interface MipsMemory

finished

public boolean finished()

Description copied from interface: MipsMemory

request end of read or write access

Specified by:

finished in interface MipsMemory

statistics

public java.lang.String statistics()

getHit

public boolean getHit(int adr)

Description copied from interface: MipsMemory

Is data present at the specified address?

Specified by:

getHit in interface MipsMemory

getName

public java.lang.String getName()

Description copied from interface: MipsMemory

get the name of this memory

Specified by:

getName in interface MipsMemory

setName

public void setName(java.lang.String newName)

Description copied from interface: MipsMemory

Set the name of this memory

Specified by:

setName in interface MipsMemory

write

public void write(int adr,
                  int data)

Drive busses for write access

Specified by:

write in interface MipsMemory

read

public void read(int adr,
                 boolean burst)

Drive busses for read access

Specified by:

read in interface MipsMemory

getReadResult

public int getReadResult()

get result

Specified by:

getReadResult in interface MipsMemory

getWordWidth

public int getWordWidth()

Witdh of one word in bits

Specified by:

getWordWidth in interface Memory

Overrides:

getWordWidth in class BreakPointMemory

getMemorySize

public int getMemorySize()

Capacity of the memory in words

Specified by:

getMemorySize in interface Memory

Overrides:

getMemorySize in class BreakPointMemory

readMemory

public int readMemory(int address)

Read a word from the memory

Specified by:

readMemory in interface Memory

Overrides:

readMemory in class BreakPointMemory

writeMemory

public void writeMemory(int address,
                        int word)

Write a word into the memory

Specified by:

writeMemory in interface Memory

Overrides:

writeMemory in class BreakPointMemory

setLog

public void setLog(boolean newDebug)

Description copied from interface: Memory

Enable or disable logging output

Specified by:

setLog in interface Memory

Overrides:

setLog in class BreakPointMemory

getLog

public boolean getLog()

Description copied from interface: Memory

Get debug mode

Specified by:

getLog in interface Memory

Overrides:

getLog in class BreakPointMemory