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Remove DecoupledTLB

This commit is contained in:
Andrew Waterman 2017-03-15 15:17:40 -07:00
parent 78f9f6b9ef
commit a6874c03f7

View File

@ -207,48 +207,3 @@ class TLB(entries: Int)(implicit edge: TLEdgeOut, p: Parameters) extends CoreMod
} }
} }
} }
class DecoupledTLB(entries: Int)(implicit edge: TLEdgeOut, p: Parameters) extends Module {
val io = new Bundle {
val req = Decoupled(new TLBReq).flip
val resp = Decoupled(new TLBResp)
val ptw = new TLBPTWIO
}
val req = Reg(new TLBReq)
val resp = Reg(new TLBResp)
val tlb = Module(new TLB(entries))
val s_idle :: s_tlb_req :: s_tlb_resp :: s_done :: Nil = Enum(Bits(), 4)
val state = Reg(init = s_idle)
when (io.req.fire()) {
req := io.req.bits
state := s_tlb_req
}
when (tlb.io.req.fire()) {
state := s_tlb_resp
}
when (state === s_tlb_resp) {
when (tlb.io.resp.miss) {
state := s_tlb_req
} .otherwise {
resp := tlb.io.resp
state := s_done
}
}
when (io.resp.fire()) { state := s_idle }
io.req.ready := state === s_idle
tlb.io.req.valid := state === s_tlb_req
tlb.io.req.bits := req
io.resp.valid := state === s_done
io.resp.bits := resp
io.ptw <> tlb.io.ptw
}