riscv/rocket-chip
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Correction to probe reply w/ data handling

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This commit is contained in:
Henry Cook 2012-03-02 13:41:01 -08:00
parent 1e1926ce63
commit 00989c58bd
1 changed files with 16 additions and 9 deletions
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17
rocket/src/main/scala/coherence.scala
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@ -31,8 +31,7 @@ class HubMemReq extends Bundle {
}
class TrackerProbeData extends Bundle {
val valid = Bool()
val data_tile_id = Bits(width = log2up(NTILES))
val tile_id = Bits(width = TILE_ID_BITS)
}
class TrackerAllocReq extends Bundle {
@ -182,7 +181,7 @@ trait FourStateCoherence extends CoherencePolicy {
class XactTracker(id: Int) extends Component with CoherencePolicy {
val io = new Bundle {
val alloc_req = (new ioDecoupled) { new TrackerAllocReq() }.flip
val probe_data = (new TrackerProbeData).asInput
val p_data = (new ioPipe) { new TrackerProbeData() }
val can_alloc = Bool(INPUT)
val xact_finish = Bool(INPUT)
val p_rep_cnt_dec = Bits(NTILES, INPUT)
@ -331,9 +330,9 @@ class XactTracker(id: Int) extends Component with CoherencePolicy {
state := s_mem
}
}
when(io.probe_data.valid) {
when(io.p_data.valid) {
p_rep_data_needs_write := Bool(true)
p_rep_tile_id_ := io.p_rep_tile_id
p_rep_tile_id_ := io.p_data.bits.tile_id
}
}
is(s_mem) {
@ -414,6 +413,8 @@ class CoherenceHubBroadcast extends CoherenceHub {
val p_rep_cnt_dec_arr = VecBuf(NGLOBAL_XACTS){ Vec(NTILES){ Wire(){Bool()} } }
val p_req_cnt_inc_arr = VecBuf(NGLOBAL_XACTS){ Vec(NTILES){ Wire(){Bool()} } }
val sent_x_rep_ack_arr = Vec(NGLOBAL_XACTS){ Wire(){ Bool()} }
val p_data_tile_id_arr = Vec(NGLOBAL_XACTS){ Wire(){ Bits(width = TILE_ID_BITS)} }
val p_data_valid_arr = Vec(NGLOBAL_XACTS){ Wire(){ Bool()} }
for( i <- 0 until NGLOBAL_XACTS) {
val t = trackerList(i).io
@ -425,11 +426,15 @@ class CoherenceHubBroadcast extends CoherenceHub {
sh_count_arr(i) := t.sharer_count
send_x_rep_ack_arr(i) := t.send_x_rep_ack
t.xact_finish := do_free_arr(i)
t.p_data.bits.tile_id := p_data_tile_id_arr(i)
t.p_data.valid := p_data_valid_arr(i)
t.p_rep_cnt_dec := p_rep_cnt_dec_arr(i).toBits
t.p_req_cnt_inc := p_req_cnt_inc_arr(i).toBits
t.sent_x_rep_ack := sent_x_rep_ack_arr(i)
do_free_arr(i) := Bool(false)
sent_x_rep_ack_arr(i) := Bool(false)
p_data_tile_id_arr(i) := Bits(0, width = TILE_ID_BITS)
p_data_valid_arr(i) := Bool(false)
for( j <- 0 until NTILES) {
p_rep_cnt_dec_arr(i)(j) := Bool(false)
p_req_cnt_inc_arr(i)(j) := Bool(false)
@ -491,6 +496,8 @@ class CoherenceHubBroadcast extends CoherenceHub {
val idx = p_rep.bits.global_xact_id
p_rep.ready := foldR(trackerList.map(_.io.pop_p_rep(j)))(_ || _)
p_rep_data.ready := foldR(trackerList.map(_.io.pop_p_rep_data(j)))(_ || _)
p_data_valid_arr(idx) := p_rep.valid && p_rep.bits.has_data
p_data_tile_id_arr(idx) := UFix(j)
}
for( i <- 0 until NGLOBAL_XACTS ) {
trackerList(i).io.p_rep_data.valid := io.tiles(trackerList(i).io.p_rep_tile_id).probe_rep_data.valid