hades.models.rtlib.memory
Class RegBank

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

All Implemented Interfaces:

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

public class RegBank

extends GenericMemory

RegBank - a generic register band with two-read ports (X,Y) and one-write (Z) port with n words by m bits. It has a global active-low write-enable and an edge-sensitive clock for writing.

Note that the model currently does not check for timing violations during write cycles.

See Also:

Serialized Form

Field Summary

protected PortStdLogicVector	port_AX
protected PortStdLogicVector	port_AY
protected PortStdLogicVector	port_AZ
protected PortStdLogic1164	port_CLK
protected PortStdLogicVector	port_DX
protected PortStdLogicVector	port_DY
protected PortStdLogicVector	port_DZ
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

RegBank()
RegBank constructor

Method Summary

boolean	canChangeSize()
protected void	constructPorts()
void	elaborate(java.lang.Object arg) elaborate(): On elaboration, the inputs of the RegBank will be undefined.
void	evaluate(java.lang.Object arg) evaluate(): If either port_CLK or port_nWE are undefined, the RegBank data is invalidated, and the DO1 value is undefined.
boolean	resize(int n_words, int n_bits)
void	schedule(Port port, java.lang.Object value, double time)
void	setBitsPerWord(int n_bits)
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, getDataAt, 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, setDataAt, 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_AX

protected PortStdLogicVector port_AX

port_AY

protected PortStdLogicVector port_AY

port_AZ

protected PortStdLogicVector port_AZ

port_DX

protected PortStdLogicVector port_DX

port_DY

protected PortStdLogicVector port_DY

port_DZ

protected PortStdLogicVector port_DZ

port_nWE

protected PortStdLogic1164 port_nWE

port_CLK

protected PortStdLogic1164 port_CLK

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

RegBank

public RegBank()

RegBank constructor

Method Detail

constructPorts

protected void constructPorts()

Overrides:

constructPorts 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 RegBank 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_CLK or port_nWE are undefined, the RegBank data is invalidated, and the DO1 value is undefined.

Warning: The RegBank 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

schedule

public void schedule(Port port,
                     java.lang.Object value,
                     double time)