riscv/rocket-chip
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refactored VMU, now uses one skid buffer

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This commit is contained in:
Yunsup Lee 2012-03-15 01:10:17 -07:00
parent b5fa86e844
commit f972977da1
1 changed files with 3 additions and 4 deletions
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7
rocket/src/main/scala/cpu.scala
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@ -221,7 +221,7 @@ class rocketProc(resetSignal: Bool = null) extends Component(resetSignal)
storegen.io.din := vu.io.dmem_req.bits.data storegen.io.din := vu.io.dmem_req.bits.data
arb.io.requestor(DMEM_VU).req_val := vu.io.dmem_req.valid arb.io.requestor(DMEM_VU).req_val := vu.io.dmem_req.valid
arb.io.requestor(DMEM_VU).req_kill := Reg(vu.io.dmem_req.bits.kill) arb.io.requestor(DMEM_VU).req_kill := vu.io.dmem_req.bits.kill
arb.io.requestor(DMEM_VU).req_cmd := vu.io.dmem_req.bits.cmd arb.io.requestor(DMEM_VU).req_cmd := vu.io.dmem_req.bits.cmd
arb.io.requestor(DMEM_VU).req_type := vu.io.dmem_req.bits.typ arb.io.requestor(DMEM_VU).req_type := vu.io.dmem_req.bits.typ
arb.io.requestor(DMEM_VU).req_idx := vu.io.dmem_req.bits.idx arb.io.requestor(DMEM_VU).req_idx := vu.io.dmem_req.bits.idx
@ -229,10 +229,9 @@ class rocketProc(resetSignal: Bool = null) extends Component(resetSignal)
arb.io.requestor(DMEM_VU).req_data := Reg(storegen.io.dout) arb.io.requestor(DMEM_VU).req_data := Reg(storegen.io.dout)
arb.io.requestor(DMEM_VU).req_tag := vu.io.dmem_req.bits.tag arb.io.requestor(DMEM_VU).req_tag := vu.io.dmem_req.bits.tag
vu.io.dmem_req.ready := arb.io.requestor(DMEM_VU).req_rdy
vu.io.dmem_resp.valid := Reg(arb.io.requestor(DMEM_VU).resp_val) vu.io.dmem_resp.valid := Reg(arb.io.requestor(DMEM_VU).resp_val)
// the vu doesn't look at the ready signal, it's simply a nack vu.io.dmem_resp.bits.nack := arb.io.requestor(DMEM_VU).resp_nack
// but should be delayed one cycle to match the nack semantics
vu.io.dmem_resp.bits.nack := arb.io.requestor(DMEM_VU).resp_nack || Reg(!arb.io.requestor(DMEM_VU).req_rdy)
vu.io.dmem_resp.bits.data := arb.io.requestor(DMEM_VU).resp_data_subword vu.io.dmem_resp.bits.data := arb.io.requestor(DMEM_VU).resp_data_subword
vu.io.dmem_resp.bits.tag := Reg(arb.io.requestor(DMEM_VU).resp_tag) vu.io.dmem_resp.bits.tag := Reg(arb.io.requestor(DMEM_VU).resp_tag)
vu.io.dmem_resp.bits.typ := Reg(arb.io.requestor(DMEM_VU).resp_type) vu.io.dmem_resp.bits.typ := Reg(arb.io.requestor(DMEM_VU).resp_type)