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RoCC PTW refactoring

This commit is contained in:
Yunsup Lee 2016-02-24 22:39:00 -08:00
parent b96343a4e5
commit 15ac4d317f
3 changed files with 18 additions and 26 deletions

View File

@ -350,8 +350,6 @@ class DmaCtrlRegFile(implicit val p: Parameters) extends Module
class DmaController(implicit p: Parameters) extends RoCC()(p)
with HasClientDmaParameters {
io.mem.req.valid := Bool(false)
io.iptw.req.valid := Bool(false)
io.pptw.req.valid := Bool(false)
io.resp.valid := Bool(false)
io.interrupt := Bool(false)
@ -373,7 +371,7 @@ class DmaController(implicit p: Parameters) extends RoCC()(p)
io.csr.rdata(RESP_STATUS) := reg_status
val frontend = Module(new DmaFrontend)
io.dptw <> frontend.io.ptw
io.ptw(0) <> frontend.io.ptw
io.autl <> frontend.io.mem
crfile.io.incr_outstanding := frontend.io.incr_outstanding
frontend.io.host_id := io.host_id

View File

@ -9,6 +9,7 @@ import cde.{Parameters, Field}
case object RoccMaxTaggedMemXacts extends Field[Int]
case object RoccNMemChannels extends Field[Int]
case object RoccNPTWPorts extends Field[Int]
case object RoccNCSRs extends Field[Int]
class RoCCCSRs(implicit p: Parameters) extends CoreBundle()(p) {
@ -52,9 +53,7 @@ class RoCCInterface(implicit p: Parameters) extends CoreBundle()(p) {
// These should be handled differently, eventually
val autl = new ClientUncachedTileLinkIO
val utl = Vec(p(RoccNMemChannels), new ClientUncachedTileLinkIO)
val iptw = new TLBPTWIO
val dptw = new TLBPTWIO
val pptw = new TLBPTWIO
val ptw = Vec(p(RoccNPTWPorts), new TLBPTWIO)
val fpu_req = Decoupled(new FPInput)
val fpu_resp = Decoupled(new FPResult).flip
val exception = Bool(INPUT)
@ -136,9 +135,6 @@ class AccumulatorExample(n: Int = 4)(implicit p: Parameters) extends RoCC()(p) {
io.autl.acquire.valid := false
io.autl.grant.ready := false
io.iptw.req.valid := false
io.dptw.req.valid := false
io.pptw.req.valid := false
}
class TranslatorExample(implicit p: Parameters) extends RoCC()(p) {
@ -160,20 +156,22 @@ class TranslatorExample(implicit p: Parameters) extends RoCC()(p) {
state := s_ptw_req
}
when (io.dptw.req.fire()) { state := s_ptw_resp }
private val ptw = io.ptw(0)
when (state === s_ptw_resp && io.dptw.resp.valid) {
error := io.dptw.resp.bits.error
ppn := io.dptw.resp.bits.pte.ppn
when (ptw.req.fire()) { state := s_ptw_resp }
when (state === s_ptw_resp && ptw.resp.valid) {
error := ptw.resp.bits.error
ppn := ptw.resp.bits.pte.ppn
state := s_resp
}
when (io.resp.fire()) { state := s_idle }
io.dptw.req.valid := (state === s_ptw_req)
io.dptw.req.bits.addr := req_vpn
io.dptw.req.bits.store := Bool(false)
io.dptw.req.bits.fetch := Bool(false)
ptw.req.valid := (state === s_ptw_req)
ptw.req.bits.addr := req_vpn
ptw.req.bits.store := Bool(false)
ptw.req.bits.fetch := Bool(false)
io.resp.valid := (state === s_resp)
io.resp.bits.rd := req_rd
@ -184,8 +182,6 @@ class TranslatorExample(implicit p: Parameters) extends RoCC()(p) {
io.mem.req.valid := Bool(false)
io.autl.acquire.valid := Bool(false)
io.autl.grant.ready := Bool(false)
io.iptw.req.valid := Bool(false)
io.pptw.req.valid := Bool(false)
}
class CharacterCountExample(implicit p: Parameters) extends RoCC()(p)
@ -265,9 +261,6 @@ class CharacterCountExample(implicit p: Parameters) extends RoCC()(p)
io.busy := (state =/= s_idle)
io.interrupt := Bool(false)
io.mem.req.valid := Bool(false)
io.dptw.req.valid := Bool(false)
io.iptw.req.valid := Bool(false)
io.pptw.req.valid := Bool(false)
}
class OpcodeSet(val opcodes: Seq[UInt]) {

View File

@ -14,6 +14,7 @@ case class RoccParameters(
opcodes: OpcodeSet,
generator: Parameters => RoCC,
nMemChannels: Int = 0,
nPTWPorts : Int = 0,
csrs: Seq[Int] = Nil,
useFPU: Boolean = false)
@ -24,7 +25,7 @@ abstract class Tile(resetSignal: Bool = null)
val nRocc = buildRocc.size
val nFPUPorts = buildRocc.filter(_.useFPU).size
val nDCachePorts = 2 + nRocc
val nPTWPorts = 2 + 3 * nRocc
val nPTWPorts = 2 + p(RoccNPTWPorts)
val nCachedTileLinkPorts = 1
val nUncachedTileLinkPorts = 1 + p(RoccNMemChannels)
val dcacheParams = p.alterPartial({ case CacheName => "L1D" })
@ -78,6 +79,7 @@ class RocketTile(resetSignal: Bool = null)(implicit p: Parameters) extends Tile(
val roccs = buildRocc.zipWithIndex.map { case (accelParams, i) =>
val rocc = accelParams.generator(p.alterPartial({
case RoccNMemChannels => accelParams.nMemChannels
case RoccNPTWPorts => accelParams.nPTWPorts
case RoccNCSRs => accelParams.csrs.size
}))
val dcIF = Module(new SimpleHellaCacheIF()(dcacheParams))
@ -88,9 +90,6 @@ class RocketTile(resetSignal: Bool = null)(implicit p: Parameters) extends Tile(
dcIF.io.requestor <> rocc.io.mem
dcArb.io.requestor(2 + i) <> dcIF.io.cache
uncachedArb.io.in(1 + i) <> rocc.io.autl
ptw.io.requestor(2 + 3 * i) <> rocc.io.iptw
ptw.io.requestor(3 + 3 * i) <> rocc.io.dptw
ptw.io.requestor(4 + 3 * i) <> rocc.io.pptw
rocc
}
@ -109,6 +108,8 @@ class RocketTile(resetSignal: Bool = null)(implicit p: Parameters) extends Tile(
}
}
ptw.io.requestor.drop(2) <> roccs.flatMap(_.io.ptw)
core.io.rocc.busy := cmdRouter.io.busy || roccs.map(_.io.busy).reduce(_ || _)
core.io.rocc.interrupt := roccs.map(_.io.interrupt).reduce(_ || _)
respArb.io.in <> roccs.map(rocc => Queue(rocc.io.resp))