riscv/rocket-chip
1
0
Fork 0
Code Releases Activity

fix D$ refill bug

Browse Source
This commit is contained in:
Andrew Waterman 2012-11-16 21:05:29 -08:00
parent 8dce89703a
commit 9e010beffe
1 changed files with 12 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
rocket/src/main/scala/nbdcache.scala
View File

@ -816,11 +816,11 @@ class HellaCache(implicit conf: DCacheConfig) extends Component {
// refill response
val refill = conf.co.messageUpdatesDataArray(io.mem.xact_rep.bits)
writeArb.io.in(0).valid := io.mem.xact_rep.valid && refill
io.mem.xact_rep.ready := writeArb.io.in(0).ready || !refill
writeArb.io.in(0).bits := mshr.io.mem_resp
writeArb.io.in(0).bits.wmask := Fix(-1)
writeArb.io.in(0).bits.data := io.mem.xact_rep.bits.data
writeArb.io.in(1).valid := io.mem.xact_rep.valid && refill
io.mem.xact_rep.ready := writeArb.io.in(1).ready || !refill
writeArb.io.in(1).bits := mshr.io.mem_resp
writeArb.io.in(1).bits.wmask := Fix(-1)
writeArb.io.in(1).bits.data := io.mem.xact_rep.bits.data
// load hits
readArb.io.in(2).bits.addr := io.cpu.req.bits.addr
@ -840,11 +840,11 @@ class HellaCache(implicit conf: DCacheConfig) extends Component {
def storeMatch(dst: HellaCacheReq, src: HellaCacheReq) = idxMatch(dst, src) && offsetMatch(dst, src)
val p_store_match = s2_valid && storeMatch(s1_req, s2_req) ||
s3_valid && storeMatch(s1_req, s3_req)
writeArb.io.in(1).bits.addr := s3_req.addr
writeArb.io.in(1).bits.wmask := UFix(1) << s3_req.addr(conf.ramoffbits-1,offsetlsb).toUFix
writeArb.io.in(1).bits.data := Fill(MEM_DATA_BITS/conf.databits, s3_req.data)
writeArb.io.in(1).valid := s3_valid
writeArb.io.in(1).bits.way_en := s3_way
writeArb.io.in(0).bits.addr := s3_req.addr
writeArb.io.in(0).bits.wmask := UFix(1) << s3_req.addr(conf.ramoffbits-1,offsetlsb).toUFix
writeArb.io.in(0).bits.data := Fill(MEM_DATA_BITS/conf.databits, s3_req.data)
writeArb.io.in(0).valid := s3_valid
writeArb.io.in(0).bits.way_en := s3_way
// tag update after a store to an exclusive clean line.
val new_hit_state = conf.co.newStateOnHit(s2_req.cmd, s2_hit_state)
@ -871,7 +871,8 @@ class HellaCache(implicit conf: DCacheConfig) extends Component {
mshr.io.req.bits.way_en := Mux(s2_tag_match, s2_tag_match_way, s2_replaced_way_en)
mshr.io.req.bits.data := s2_req.data
mshr.io.mem_rep <> io.mem.xact_rep
mshr.io.mem_rep.valid := io.mem.xact_rep.fire()
mshr.io.mem_rep.bits := io.mem.xact_rep.bits
mshr.io.mem_abort.valid := io.mem.xact_abort.valid
mshr.io.mem_abort.bits := io.mem.xact_abort.bits
io.mem.xact_abort.ready := Bool(true)