riscv/rocket-chip
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acquire allocation bugfix

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This commit is contained in:
Henry Cook 2014-12-19 17:39:23 -08:00
parent f234fe65ce
commit 2ef4357ca8
1 changed files with 14 additions and 5 deletions
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19
uncore/src/main/scala/cache.scala
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@ -293,14 +293,19 @@ class TSHRFile(bankId: Int, innerId: String, outerId: String) extends L2HellaCac
// Handle acquire transaction initiation
val acquire = io.inner.acquire
val block_acquires = trackerList.map(_.io.has_acquire_conflict).reduce(_||_)
val alloc_arb = Module(new Arbiter(Bool(), trackerList.size))
val acquireList = trackerList.map(_.io.inner.acquire)
acquireList zip alloc_arb.io.in map { case(acq, arb) =>
val acquireMatchList = trackerList.map(_.io.has_acquire_match)
val any_acquire_matches = acquireMatchList.reduce(_||_)
val alloc_idx = Vec(alloc_arb.io.in.map(_.ready)).lastIndexWhere{b: Bool => b}
val match_idx = Vec(acquireMatchList).indexWhere{b: Bool => b}
val acquire_idx = Mux(any_acquire_matches, match_idx, alloc_idx)
acquireList.zip(alloc_arb.io.in).zipWithIndex.map { case((acq, arb), i) =>
arb.valid := acq.ready
acq.bits := acquire.bits
acq.valid := arb.ready
acq.valid := acquire.valid && (acquire_idx === UInt(i))
}
val block_acquires = trackerList.map(_.io.has_acquire_conflict).reduce(_||_)
acquire.ready := acquireList.map(_.ready).reduce(_||_) && !block_acquires
alloc_arb.io.out.ready := acquire.valid && !block_acquires
@ -367,7 +372,6 @@ class L2WritebackUnit(trackerId: Int, bankId: Int, innerId: String, outerId: Str
val inner = Bundle(new TileLinkIO, {case TLId => innerId}).flip
val outer = Bundle(new UncachedTileLinkIO, {case TLId => outerId})
val tile_incoherent = Bits(INPUT, nClients)
val has_acquire_conflict = Bool(OUTPUT)
val has_release_match = Bool(OUTPUT)
val data = new L2DataRWIO
}
@ -500,6 +504,7 @@ abstract class L2XactTracker(innerId: String, outerId: String) extends L2HellaCa
val outer = Bundle(new UncachedTileLinkIO, {case TLId => outerId})
val tile_incoherent = Bits(INPUT, nClients)
val has_acquire_conflict = Bool(OUTPUT)
val has_acquire_match = Bool(OUTPUT)
val has_release_match = Bool(OUTPUT)
val data = new L2DataRWIO
val meta = new L2MetaRWIO
@ -539,6 +544,7 @@ class L2VoluntaryReleaseTracker(trackerId: Int, bankId: Int, innerId: String, ou
Counter(io.data.write.fire(), tlDataBeats)
io.has_acquire_conflict := Bool(false)
io.has_acquire_match := Bool(false)
io.has_release_match := co.isVoluntary(c_rel.payload)
io.outer.grant.ready := Bool(false)
@ -689,8 +695,11 @@ class L2AcquireTracker(trackerId: Int, bankId: Int, innerId: String, outerId: St
xact.addr(idxMSB,idxLSB) === c_acq.payload.addr(idxMSB,idxLSB) &&
(state != s_idle) &&
!collect_cacq_data
io.has_acquire_match := co.messageHasData(xact) &&
(xact.addr === c_acq.payload.addr) &&
collect_cacq_data
io.has_release_match := !co.isVoluntary(c_rel.payload) &&
co.isCoherenceConflict(xact.addr, c_rel.payload.addr) &&
(xact.addr === c_rel.payload.addr) &&
(state === s_probe)
val next_coh_on_rel = co.masterMetadataOnRelease(c_rel.payload, xact_meta.coh, c_rel.header.src)