riscv/rocket-chip
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add probe replies to HTIF

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This commit is contained in:
Andrew Waterman
2012-03-13 16:56:47 -07:00
parent b0f798962c
commit 1492457df5
2 changed files with 11 additions and 4 deletions
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9
rocket/src/main/scala/htif.scala
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@@ -21,7 +21,7 @@ class ioHTIF extends Bundle
val pcr_rdata = Bits(64, OUTPUT)
}
class rocketHTIF(w: Int, ncores: Int) extends Component
class rocketHTIF(w: Int, ncores: Int) extends Component with FourStateCoherence
{
val io = new Bundle {
val host = new ioHost(w)
@@ -160,6 +160,13 @@ class rocketHTIF(w: Int, ncores: Int) extends Component
io.mem.xact_finish.valid := (state === state_mem_finish) && mem_needs_ack
io.mem.xact_finish.bits.global_xact_id := mem_gxid
val probe_q = (new queue(1, pipe=true)) { new TransactionReply }
probe_q.io.enq.valid := io.mem.probe_req.valid
io.mem.probe_req.ready := probe_q.io.enq.ready
probe_q.io.enq.bits := newProbeReply(io.mem.probe_req.bits, newStateOnFlush())
io.mem.probe_rep <> probe_q.io.deq
io.mem.probe_rep_data.valid := Bool(false)
pcr_done := Bool(false)
val pcr_mux = (new Mux1H(ncores)) { Bits(width = 64) }
for (i <- 0 until ncores) {

6
rocket/src/main/scala/nbdcache.scala
View File

@@ -492,7 +492,7 @@ class ProbeUnit extends Component with FourStateCoherence {
val meta_req = (new ioDecoupled) { new MetaArrayArrayReq }
val mshr_req = (new ioDecoupled) { Bool() }
val wb_req = (new ioDecoupled) { new WritebackReq }
val hit_way_oh = Bits(NWAYS, INPUT)
val tag_match_way_oh = Bits(NWAYS, INPUT)
val line_state = UFix(2, INPUT)
val address = Bits(PADDR_BITS-OFFSET_BITS, OUTPUT)
}
@@ -513,7 +513,7 @@ class ProbeUnit extends Component with FourStateCoherence {
state := Mux(way_oh.orR && needsWriteback(line_state), s_writeback_req, s_invalid)
}
when (state === s_meta_resp) {
way_oh := io.hit_way_oh
way_oh := io.tag_match_way_oh
line_state := io.line_state
state := Mux(!io.mshr_req.ready, s_meta_req, s_probe_rep)
}
@@ -891,7 +891,7 @@ class HellaCacheUniproc extends HellaCache with FourStateCoherence {
prober.io.meta_req <> meta_arb.io.in(2)
prober.io.mshr_req <> mshr.io.probe
prober.io.wb_req <> wb.io.probe
prober.io.hit_way_oh := hit_way_oh
prober.io.tag_match_way_oh := tag_match_way_oh
prober.io.line_state := meta_resp_mux.state
// replacement policy