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tilelink: Filter now support arbitrary filter functions

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This commit is contained in:
Wesley W. Terpstra 2017-07-31 16:00:21 -07:00
parent 7adfd5c431
commit 13d3ffbcaa
2 changed files with 71 additions and 26 deletions
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2
src/main/scala/coreplex/MemoryBus.scala
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@ -68,7 +68,7 @@ trait HasMemoryBus extends HasSystemBus with HasPeripheryBus with HasInterruptBu
for (bank <- 0 until nBanksPerChannel) {
val offset = (bank * nMemoryChannels) + channel
in := sbus.toMemoryBus
mbus.fromCoherenceManager := TLFilter(AddressSet(offset * blockBytes, mask))(out)
mbus.fromCoherenceManager := TLFilter(TLFilter.Mmask(AddressSet(offset * blockBytes, mask)))(out)
}
mbus
}

95
src/main/scala/tilelink/Filter.scala
View File

@ -8,31 +8,45 @@ import freechips.rocketchip.config.Parameters
import freechips.rocketchip.diplomacy._
import scala.math.{min,max}
class TLFilter(select: AddressSet)(implicit p: Parameters) extends LazyModule
class TLFilter(
Mfilter: TLManagerParameters => Option[TLManagerParameters] = TLFilter.Midentity,
Cfilter: TLClientParameters => Option[TLClientParameters] = TLFilter.Cidentity
)(implicit p: Parameters) extends LazyModule
{
val node = TLAdapterNode(
clientFn = { cp => cp },
managerFn = { mp =>
mp.copy(managers = mp.managers.map { m =>
val filtered = m.address.map(_.intersect(select)).flatten
val alignment = select.alignment /* alignment 0 means 'select' selected everything */
val maxTransfer = 1 << 30
val capTransfer = if (alignment == 0 || alignment > maxTransfer) maxTransfer else alignment.toInt
val cap = TransferSizes(1, capTransfer)
if (filtered.isEmpty) { None } else {
Some(m.copy(
address = filtered,
supportsAcquireT = m.supportsAcquireT .intersect(cap),
supportsAcquireB = m.supportsAcquireB .intersect(cap),
supportsArithmetic = m.supportsArithmetic.intersect(cap),
supportsLogical = m.supportsLogical .intersect(cap),
supportsGet = m.supportsGet .intersect(cap),
supportsPutFull = m.supportsPutFull .intersect(cap),
supportsPutPartial = m.supportsPutPartial.intersect(cap),
supportsHint = m.supportsHint .intersect(cap)))
}
}.flatten)
})
clientFn = { cp => cp.copy(clients = cp.clients.flatMap { c =>
val out = Cfilter(c)
out.map { o => // Confirm the filter only REMOVES capability
require (c.sourceId.contains(o.sourceId))
require (c.supportsProbe.contains(o.supportsProbe))
require (c.supportsArithmetic.contains(o.supportsArithmetic))
require (c.supportsLogical.contains(o.supportsLogical))
require (c.supportsGet.contains(o.supportsGet))
require (c.supportsPutFull.contains(o.supportsPutFull))
require (c.supportsPutPartial.contains(o.supportsPutPartial))
require (c.supportsHint.contains(o.supportsHint))
require (!c.requestFifo || o.requestFifo)
}
out
})},
managerFn = { mp => mp.copy(managers = mp.managers.flatMap { m =>
val out = Mfilter(m)
out.map { o => // Confirm the filter only REMOVES capability
o.address.foreach { a => require (m.address.map(_.contains(a)).reduce(_||_)) }
require (o.regionType <= m.regionType)
// we allow executable to be changed both ways
require (m.supportsAcquireT.contains(o.supportsAcquireT))
require (m.supportsAcquireB.contains(o.supportsAcquireB))
require (m.supportsArithmetic.contains(o.supportsArithmetic))
require (m.supportsLogical.contains(o.supportsLogical))
require (m.supportsGet.contains(o.supportsGet))
require (m.supportsPutFull.contains(o.supportsPutFull))
require (m.supportsPutPartial.contains(o.supportsPutPartial))
require (m.supportsHint.contains(o.supportsHint))
require (m.fifoId == o.fifoId) // could relax this, but hard to validate
}
out
})})
lazy val module = new LazyModuleImp(this) {
val io = new Bundle {
@ -45,9 +59,40 @@ class TLFilter(select: AddressSet)(implicit p: Parameters) extends LazyModule
object TLFilter
{
def Midentity: TLManagerParameters => Option[TLManagerParameters] = { m => Some(m) }
def Cidentity: TLClientParameters => Option[TLClientParameters] = { c => Some(c) }
def Mmask(select: AddressSet): TLManagerParameters => Option[TLManagerParameters] = { m =>
val filtered = m.address.map(_.intersect(select)).flatten
val alignment = select.alignment /* alignment 0 means 'select' selected everything */
val maxTransfer = 1 << 30
val capTransfer = if (alignment == 0 || alignment > maxTransfer) maxTransfer else alignment.toInt
val cap = TransferSizes(1, capTransfer)
if (filtered.isEmpty) { None } else {
Some(m.copy(
address = filtered,
supportsAcquireT = m.supportsAcquireT .intersect(cap),
supportsAcquireB = m.supportsAcquireB .intersect(cap),
supportsArithmetic = m.supportsArithmetic.intersect(cap),
supportsLogical = m.supportsLogical .intersect(cap),
supportsGet = m.supportsGet .intersect(cap),
supportsPutFull = m.supportsPutFull .intersect(cap),
supportsPutPartial = m.supportsPutPartial.intersect(cap),
supportsHint = m.supportsHint .intersect(cap)))
}
}
def Mnocache: TLManagerParameters => Option[TLManagerParameters] = { m =>
if (m.supportsAcquireB) None else Some(m)
}
def Cnocache: TLClientParameters => Option[TLClientParameters] = { c =>
if (c.supportsProbe) None else Some(c)
}
// applied to the TL source node; y.node := TLBuffer(x.node)
def apply(select: AddressSet)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
val filter = LazyModule(new TLFilter(select))
def apply(
Mfilter: TLManagerParameters => Option[TLManagerParameters] = TLFilter.Midentity,
Cfilter: TLClientParameters => Option[TLClientParameters] = TLFilter.Cidentity
)(x: TLOutwardNode)(implicit p: Parameters, sourceInfo: SourceInfo): TLOutwardNode = {
val filter = LazyModule(new TLFilter(Mfilter, Cfilter))
filter.node := x
filter.node
}