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package vexriscv
import vexriscv.plugin._
import spinal.core._
import spinal.lib._
import scala.collection.mutable
import scala.collection.mutable.ArrayBuffer
trait PipelineThing[T]
trait Pipeline {
type T <: Pipeline
val plugins = ArrayBuffer[Plugin[T]]()
var stages = ArrayBuffer[Stage]()
var unremovableStages = mutable.Set[Stage]()
val things = mutable.LinkedHashMap[PipelineThing[_], Any]()
// val services = ArrayBuffer[Any]()
def stageBefore(stage : Stage) = stages(indexOf(stage)-1)
def indexOf(stage : Stage) = stages.indexOf(stage)
def service[T](clazz : Class[T]) = {
val filtered = plugins.filter(o => clazz.isAssignableFrom(o.getClass))
assert(filtered.length == 1, s"??? ${clazz.getName}")
filtered.head.asInstanceOf[T]
}
def serviceExist[T](clazz : Class[T]) = {
val filtered = plugins.filter(o => clazz.isAssignableFrom(o.getClass))
filtered.length != 0
}
def serviceElse[T](clazz : Class[T], default : => T) : T = {
if(!serviceExist(clazz)) return default
val filtered = plugins.filter(o => clazz.isAssignableFrom(o.getClass))
assert(filtered.length == 1)
filtered.head.asInstanceOf[T]
}
def update[T](that : PipelineThing[T], value : T) : Unit = things(that) = value
def apply[T](that : PipelineThing[T]) : T = things(that).asInstanceOf[T]
def build(): Unit ={
plugins.foreach(_.pipeline = this.asInstanceOf[T])
plugins.foreach(_.setup(this.asInstanceOf[T]))
plugins.foreach{ p =>
p.parentScope = Component.current.dslBody //Put the given plugin as a child of the current component
p.reflectNames()
}
//Build plugins
plugins.foreach(_.build(this.asInstanceOf[T]))
//Interconnect stages
class KeyInfo{
var insertStageId = Int.MaxValue
var lastInputStageId = Int.MinValue
var lastOutputStageId = Int.MinValue
def addInputStageIndex(stageId : Int): Unit = {
require(stageId >= insertStageId)
lastInputStageId = Math.max(lastInputStageId,stageId)
lastOutputStageId = Math.max(lastOutputStageId,stageId-1)
}
def addOutputStageIndex(stageId : Int): Unit = {
require(stageId >= insertStageId)
lastInputStageId = Math.max(lastInputStageId,stageId)
lastOutputStageId = Math.max(lastOutputStageId,stageId)
}
def setInsertStageId(stageId : Int) = insertStageId = stageId
}
val inputOutputKeys = mutable.LinkedHashMap[Stageable[Data],KeyInfo]()
val insertedStageable = mutable.Set[Stageable[Data]]()
for(stageIndex <- 0 until stages.length; stage = stages(stageIndex)){
stage.inserts.keysIterator.foreach(signal => inputOutputKeys.getOrElseUpdate(signal,new KeyInfo).setInsertStageId(stageIndex))
stage.inserts.keysIterator.foreach(insertedStageable += _)
}
val missingInserts = mutable.Set[Stageable[Data]]()
for(stageIndex <- 0 until stages.length; stage = stages(stageIndex)){
stage.inputs.keysIterator.foreach(key => if(!insertedStageable.contains(key)) missingInserts += key)
stage.outputs.keysIterator.foreach(key => if(!insertedStageable.contains(key)) missingInserts += key)
}
if(missingInserts.nonEmpty){
throw new Exception("Missing inserts : " + missingInserts.map(_.getName()).mkString(", "))
}
for(stageIndex <- 0 until stages.length; stage = stages(stageIndex)){
stage.inputs.keysIterator.foreach(key => inputOutputKeys.getOrElseUpdate(key,new KeyInfo).addInputStageIndex(stageIndex))
stage.outputs.keysIterator.foreach(key => inputOutputKeys.getOrElseUpdate(key,new KeyInfo).addOutputStageIndex(stageIndex))
}
for((key,info) <- inputOutputKeys) {
//Interconnect inputs -> outputs
for (stageIndex <- info.insertStageId to info.lastOutputStageId;
stage = stages(stageIndex)) {
stage.output(key)
val outputDefault = stage.outputsDefault.getOrElse(key, null)
if (outputDefault != null) {
outputDefault := stage.input(key)
}
}
//Interconnect outputs -> inputs
for (stageIndex <- info.insertStageId to info.lastInputStageId) {
val stage = stages(stageIndex)
stage.input(key)
val inputDefault = stage.inputsDefault.getOrElse(key, null)
if (inputDefault != null) {
if (stageIndex == info.insertStageId) {
inputDefault := stage.inserts(key)
} else {
val stageBefore = stages(stageIndex - 1)
inputDefault := RegNextWhen(stageBefore.output(key), stage.dontSample.getOrElse(key, Nil).foldLeft(!stage.arbitration.isStuck)(_ && !_)).setName(s"${stageBefore.getName()}_to_${stage.getName()}_${key.getName()}")
}
}
}
}
//Arbitration
for(stageIndex <- 0 until stages.length; stage = stages(stageIndex)) {
stage.arbitration.isFlushed := stages.drop(stageIndex+1).map(_.arbitration.flushNext).orR || stages.drop(stageIndex).map(_.arbitration.flushIt).orR
if(!unremovableStages.contains(stage))
stage.arbitration.removeIt setWhen stage.arbitration.isFlushed
else
assert(stage.arbitration.removeIt === False,"removeIt should never be asserted on this stage")
}
for(stageIndex <- 0 until stages.length; stage = stages(stageIndex)){
stage.arbitration.isStuckByOthers := stage.arbitration.haltByOther || stages.takeRight(stages.length - stageIndex - 1).map(s => s.arbitration.isStuck/* && !s.arbitration.removeIt*/).foldLeft(False)(_ || _)
stage.arbitration.isStuck := stage.arbitration.haltItself || stage.arbitration.isStuckByOthers
stage.arbitration.isMoving := !stage.arbitration.isStuck && !stage.arbitration.removeIt
stage.arbitration.isFiring := stage.arbitration.isValid && !stage.arbitration.isStuck && !stage.arbitration.removeIt
}
for(stageIndex <- 1 until stages.length){
val stageBefore = stages(stageIndex - 1)
val stage = stages(stageIndex)
stage.arbitration.isValid.setAsReg() init(False)
when(!stage.arbitration.isStuck || stage.arbitration.removeIt) {
stage.arbitration.isValid := False
}
when(!stageBefore.arbitration.isStuck && !stageBefore.arbitration.removeIt) {
stage.arbitration.isValid := stageBefore.arbitration.isValid
}
}
}
Component.current.addPrePopTask(() => build())
}
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