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frontbus: provide fifofixer on the side of the front bus where masters connect

This commit is contained in:
Henry Cook 2017-09-01 14:26:55 -07:00 committed by Wesley W. Terpstra
parent 667d966410
commit 8fc4d78c84
1 changed files with 22 additions and 11 deletions
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33
src/main/scala/coreplex/FrontBus.scala
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@ -12,25 +12,36 @@ case class FrontBusParams(
beatBytes: Int,
blockBytes: Int,
masterBuffering: BufferParams = BufferParams.default,
slaveBuffering: BufferParams = BufferParams.none // TODO should be BufferParams.none on BCE
slaveBuffering: BufferParams = BufferParams.none
) extends TLBusParams
case object FrontBusParams extends Field[FrontBusParams]
class FrontBus(params: FrontBusParams)(implicit p: Parameters) extends TLBusWrapper(params, "FrontBus") {
def fromSyncMasters(params: BufferParams = BufferParams.default, buffers: Int = 1, name: Option[String] = None): TLInwardNode =
fromSyncPorts(params, buffers, name)
private val master_fixer = LazyModule(new TLFIFOFixer(TLFIFOFixer.all))
master_fixer.suggestName(s"${busName}_master_TLFIFOFixer")
inwardBufNode :=* master_fixer.node
def fromSyncPorts(params: BufferParams = BufferParams.default, buffers: Int = 1, name: Option[String] = None): TLInwardNode = {
require(params == BufferParams.default, "Only BufferParams.default supported for FrontBus at this time.")
val (in, out) = bufferChain(buffers, name)
inwardNode :=* out
def fromSyncMasters(addBuffers: Int = 0, name: Option[String] = None): TLInwardNode = {
val (in, out) = bufferChain(addBuffers, name)
inwardBufNode :=* out
in
}
def fromSyncFIFOMaster(params: BufferParams = BufferParams.default, buffers: Int = 1, name: Option[String] = None): TLInwardNode =
fromSyncPorts(params, buffers, name)
def fromSyncPorts(addBuffers: Int = 0, name: Option[String] = None): TLInwardNode = {
val (in, out) = bufferChain(addBuffers, name)
master_fixer.node :=* out
in
}
def fromSyncFIFOMasters(addBuffers: Int = 0, name: Option[String] = None): TLInwardNode = {
val (in, out) = bufferChain(addBuffers, name)
master_fixer.node :=* out
in
}
def fromCoherentChip: TLInwardNode = inwardNode
def toSystemBus : TLOutwardNode = outwardBufNode
@ -43,8 +54,8 @@ trait HasFrontBus extends HasSystemBus {
private val frontbusParams = p(FrontBusParams)
val frontbusBeatBytes = frontbusParams.beatBytes
val frontbus = new FrontBus(frontbusParams)
val fbus = new FrontBus(frontbusParams)
sbus.fromSyncPorts(name = Some("FrontBus")) := frontbus.toSystemBus
sbus.bufferFromMasters := fbus.toSystemBus
}