riscv/rocket-chip
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disentangle is_hit logic

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This commit is contained in:
Henry Cook 2015-03-18 21:11:40 -07:00
parent b92ea60891
commit 002851f836
1 changed files with 11 additions and 17 deletions
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26
uncore/src/main/scala/cache.scala
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@ -608,16 +608,8 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
val pending_coh = Reg{ xact_meta.coh.clone }
val present_puts = Reg(init=Bits(0, width = innerDataBeats))
present_puts := (present_puts | addPendingBitWhenHasData(io.inner.acquire))
val is_hit = (if(isLastLevelCache)
(xact.isBuiltInType(Acquire.putBlockType) ||
xact_meta.coh.outer.isValid())
else (xact_tag_match && xact_meta.coh.outer.isHit(xact.op_code())))
val do_allocate = xact.allocate()
val needs_writeback = !xact_tag_match && do_allocate &&
(xact_meta.coh.outer.requiresVoluntaryWriteback() ||
xact_meta.coh.inner.requiresProbesOnVoluntaryWriteback())
val needs_more_put_data = !present_puts.andR
val do_allocate = xact.allocate()
val release_count = Reg(init = UInt(0, width = log2Up(nCoherentClients+1)))
val pending_probes = Reg(init = Bits(0, width = nCoherentClients))
@ -861,7 +853,6 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
(xact.isBuiltInType(Acquire.putBlockType) ||
_tag_match && _coh.outer.isValid())
else (_tag_match && _coh.outer.isHit(xact.op_code())))
val _needs_writeback = !_tag_match && do_allocate &&
(_coh.outer.requiresVoluntaryWriteback() ||
_coh.inner.requiresProbesOnVoluntaryWriteback())
@ -882,10 +873,9 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
is(s_wb_req) { when(io.wb.req.ready) { state := s_wb_resp } }
is(s_wb_resp) {
when(io.wb.resp.valid) {
state := Mux(!is_hit, s_outer_acquire,
Mux(pending_reads.orR, s_data_read,
Mux(!pending_writes.orR, s_inner_grant,
Mux(needs_more_put_data, s_wait_puts, s_data_write))))
val _skip_outer_acquire = Bool(isLastLevelCache) && xact.isBuiltInType(Acquire.putBlockType)
state := Mux(!_skip_outer_acquire, s_outer_acquire,
Mux(needs_more_put_data, s_wait_puts, s_data_write))
}
}
is(s_inner_probe) {
@ -907,7 +897,11 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
}
}
when(release_count === UInt(0)) {
state := Mux(!is_hit, s_outer_acquire,
val _skip_outer_acquire = (if(isLastLevelCache)
(xact.isBuiltInType(Acquire.putBlockType) ||
xact_meta.coh.outer.isValid())
else xact_meta.coh.outer.isHit(xact.op_code()))
state := Mux(!_skip_outer_acquire, s_outer_acquire,
Mux(pending_reads.orR, s_data_read,
Mux(!pending_writes.orR, s_inner_grant,
Mux(needs_more_put_data, s_wait_puts, s_data_write))))
@ -968,7 +962,7 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
is(s_inner_grant) {
when(ignt_q.io.count === UInt(0) ||
(ignt_data_done && ignt_q.io.count === UInt(1))) {
val meta_dirty = !is_hit || pending_coh_on_ignt != xact_meta.coh
val meta_dirty = !xact_tag_match || pending_coh_on_ignt != xact_meta.coh
when(meta_dirty) { pending_coh := pending_coh_on_ignt }
state := Mux(meta_dirty, s_meta_write,
Mux(ifin_cnt > UInt(0) || io.ignt().requiresAck(),