riscv/rocket-chip
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interlock probe unit on tag RAW hazards

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This commit is contained in:
Andrew Waterman 2013-04-30 00:37:51 -07:00
parent e8b20f3d38
commit 1501e90c1f
1 changed files with 4 additions and 1 deletions
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5
rocket/src/main/scala/nbdcache.scala
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@ -283,7 +283,10 @@ class MSHR(id: Int)(implicit conf: DCacheConfig, lnconf: LogicalNetworkConfigura
io.tag := req.addr >> conf.untagbits
io.req_pri_rdy := state === s_invalid
io.req_sec_rdy := sec_rdy && rpq.io.enq.ready
io.probe_rdy := !idx_match || (state != s_wb_req && state != s_wb_resp && state != s_meta_clear)
val meta_hazard = Reg(resetVal = UFix(0,2))
when (meta_hazard != 0 || io.meta_write.fire()) { meta_hazard := meta_hazard + 1 }
io.probe_rdy := !idx_match || (state != s_wb_req && state != s_wb_resp && state != s_meta_clear && meta_hazard === 0)
io.meta_write.valid := state === s_meta_write_req || state === s_meta_clear
io.meta_write.bits.idx := req_idx