hades.models.rtlib.memory
Class MipsRegBank

java.lang.Object
  hades.simulator.SimObject
      hades.models.rtlib.memory.GenericMemory
          hades.models.rtlib.memory.MipsRegBank

All Implemented Interfaces:

java.lang.Cloneable, ContextToolTip, Memory, java.io.Serializable, Simulatable

public class MipsRegBank

extends GenericMemory

See Also:

Serialized Form

Field Summary

protected PortStdLogicVector	port_AR0
protected PortStdLogicVector	port_AR1
protected PortStdLogicVector	port_AW0
protected PortStdLogicVector	port_DR0
protected PortStdLogicVector	port_DR1
protected PortStdLogicVector	port_DW0
protected PortStdLogic1164	port_nCS
protected PortStdLogic1164	port_nWE
static double	t_access
static double	t_min_we_cycle
static double	t_setup
static double	t_tristate
static double	t_undefined

Fields inherited from class hades.models.rtlib.memory.GenericMemory

bit_mask, data, enableAnimationFlag, last_read_addr, last_read_data, last_write_addr, last_write_data, MEF, n_bits, n_words, resourcename, TRISTATED, UNDEFINED, vector_000, vector_111, vector_UUU, vector_XXX, vector_ZZZ

Fields inherited from class hades.simulator.SimObject

classloader, console, debug, editor, name, parent, ports, propertySheet, simulator, symbol, versionId, visible

Constructor Summary

MipsRegBank()
MipsRegBank constructor

Method Summary

boolean	canChangeSize()
protected void	constructPorts()
void	elaborate(java.lang.Object arg) elaborate(): On elaboration, the inputs of the MipsRegBank will be undefined.
void	evaluate(java.lang.Object arg) evaluate(): If either port_nCS or port_nWE are undefined, the MipsRegBank data is invalidated, and the DR1 value is undefined.
long	getDataAt(int addr)
boolean	resize(int n_words, int n_bits)
void	setBitsPerWord(int n_bits)
void	setDataAt(int addr, long data)
void	setSize(int n_words)

Methods inherited from class hades.models.rtlib.memory.GenericMemory

addMemoryListener, addMemoryListenerOld, checkInvalidateMemory, configure, constructStandardValues, createMemory, dataAtAddressIsUndefined, dbg, getAddressBusWidth, getAddrOffset, getBitsPerWord, getConfigDialog, getDataArray, getEnableAnimationFlag, getExternalResources, getHexDigitsPerWord, getHexString, getInstructionDecoder, getPropertySheet, getResourcename, getSize, getToolTip, initialize, initializeWithDefaultValues, initializeWithRandomValues, initializeWithX, initializeWithZeroes, isConnected, main, merge, needsExternalResources, notifyReadListeners, notifyReadListenersOld, notifyWriteListeners, notifyWriteListenersOld, parse, parseLabelLine, parseRAM, removeMemoryListener, removeMemoryListenerOld, save, setDataArray, setEnableAnimationFlag, setEnableAnimationFlag, setInstructionDecoder, setResourcename, toString, warning, write

Methods inherited from class hades.simulator.SimObject

constructDynamicSymbol, copy, getBindkey, getClassLoader, getDebug, getEditor, getFullName, getName, getParent, getPort, getPorts, getResourceAsStream, getSimulator, getSymbol, getSymbolResourceName, getVersionId, isVisible, keyPressed, message, mousePressed, needsDynamicSymbol, setClassLoader, setConsole, setDebug, setEditor, setName, setParent, setPorts, setSimulator, setSymbol, setVersionId, setVisible, tearDown

Methods inherited from class java.lang.Object

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

Field Detail

port_AR0

protected PortStdLogicVector port_AR0

port_AR1

protected PortStdLogicVector port_AR1

port_AW0

protected PortStdLogicVector port_AW0

port_DR0

protected PortStdLogicVector port_DR0

port_DR1

protected PortStdLogicVector port_DR1

port_DW0

protected PortStdLogicVector port_DW0

port_nWE

protected PortStdLogic1164 port_nWE

port_nCS

protected PortStdLogic1164 port_nCS

t_access

public static final double t_access

See Also:

Constant Field Values

t_tristate

public static final double t_tristate

See Also:

Constant Field Values

t_undefined

public static final double t_undefined

See Also:

Constant Field Values

t_setup

public static final double t_setup

See Also:

Constant Field Values

t_min_we_cycle

public static final double t_min_we_cycle

See Also:

Constant Field Values

Constructor Detail

MipsRegBank

public MipsRegBank()

MipsRegBank constructor

Method Detail

constructPorts

protected void constructPorts()

Overrides:

constructPorts in class GenericMemory

getDataAt

public long getDataAt(int addr)

Specified by:

getDataAt in interface Memory

Overrides:

getDataAt in class GenericMemory

setDataAt

public void setDataAt(int addr,
                      long data)

Specified by:

setDataAt in interface Memory

Overrides:

setDataAt in class GenericMemory

canChangeSize

public boolean canChangeSize()

Specified by:

canChangeSize in interface Memory

Overrides:

canChangeSize in class GenericMemory

setSize

public void setSize(int n_words)

Specified by:

setSize in interface Memory

Overrides:

setSize in class GenericMemory

setBitsPerWord

public void setBitsPerWord(int n_bits)

Specified by:

setBitsPerWord in interface Memory

Overrides:

setBitsPerWord in class GenericMemory

resize

public boolean resize(int n_words,
                      int n_bits)

Specified by:

resize in interface Memory

Overrides:

resize in class GenericMemory

elaborate

public void elaborate(java.lang.Object arg)

elaborate(): On elaboration, the inputs of the MipsRegBank will be undefined. Correspondingly, the outputs are, too.

Specified by:

elaborate in interface Simulatable

Overrides:

elaborate in class GenericMemory

evaluate

public void evaluate(java.lang.Object arg)

evaluate(): If either port_nCS or port_nWE are undefined, the MipsRegBank data is invalidated, and the DR1 value is undefined. If port_nCS is high, the MipsRegBank is inactive. That is, the outputs are tristated, and all write requests are ignored. If port_nCS is low, the output is driven with the memory contents of the currently active address. Also, as long as port_nWE is low, the input data is written to the active address.

Warning: The MipsRegBank model currently does not check for timing violations or address glitches during write cycles. Instead, the corresponding memory locations are written.

Specified by:

evaluate in interface Simulatable

Overrides:

evaluate in class GenericMemory