improve htif<->pcr interface
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parent
54fa6f660d
commit
3a487ac89b
@ -120,14 +120,14 @@ class rocketDpathPCR extends Component
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val rdata = Wire() { Bits() };
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val ren = io.r.en || io.host.pcr_ren
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val raddr = Mux(io.r.en, io.r.addr, io.host.pcr_addr)
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io.host.pcr_rdata := rdata
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val raddr = Mux(io.r.en, io.r.addr, io.host.pcr_req.bits.addr)
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io.host.pcr_rep.valid := io.host.pcr_req.valid && !io.r.en && !io.host.pcr_req.bits.rw
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io.host.pcr_rep.bits := rdata
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val wen = io.w.en || io.host.pcr_wen
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val waddr = Mux(io.w.en, io.w.addr, io.host.pcr_addr)
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val wdata = Mux(io.w.en, io.w.data, io.host.pcr_wdata)
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io.host.pcr_rdy := Mux(io.host.pcr_wen, !io.w.en, !io.r.en)
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val wen = io.w.en || io.host.pcr_req.valid && io.host.pcr_req.bits.rw
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val waddr = Mux(io.w.en, io.w.addr, io.host.pcr_req.bits.addr)
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val wdata = Mux(io.w.en, io.w.data, io.host.pcr_req.bits.data)
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io.host.pcr_req.ready := Mux(io.host.pcr_req.bits.rw, !io.w.en, !io.r.en)
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io.ptbr_wen := reg_status_vm.toBool && wen && (waddr === PCR_PTBR);
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io.status := Cat(reg_status_im, Bits(0,7), reg_status_vm, reg_status_sx, reg_status_ux, reg_status_s, reg_status_ps, reg_status_ec, reg_status_ev, reg_status_ef, reg_status_et);
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@ -203,26 +203,23 @@ class rocketDpathPCR extends Component
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when (waddr === PCR_VECBANK) { reg_vecbank:= wdata(7,0) }
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}
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rdata := Bits(0, 64)
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when (ren) {
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switch (raddr) {
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is (PCR_STATUS) { rdata := io.status }
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is (PCR_EPC) { rdata := Cat(Fill(64-VADDR_BITS-1, reg_epc(VADDR_BITS)), reg_epc); }
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is (PCR_BADVADDR) { rdata := Cat(Fill(64-VADDR_BITS-1, reg_badvaddr(VADDR_BITS)), reg_badvaddr); }
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is (PCR_EVEC) { rdata := Cat(Fill(64-VADDR_BITS, reg_ebase(VADDR_BITS-1)), reg_ebase); }
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is (PCR_COUNT) { rdata := Cat(Fill(32, reg_count(31)), reg_count); }
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is (PCR_COMPARE) { rdata := Cat(Fill(32, reg_compare(31)), reg_compare); }
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is (PCR_CAUSE) { rdata := Cat(reg_cause(5), Bits(0,58), reg_cause(4,0)); }
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is (PCR_COREID) { rdata := Bits(COREID,64); }
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is (PCR_IMPL) { rdata := Bits(2) }
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is (PCR_FROMHOST) { rdata := reg_fromhost; }
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is (PCR_TOHOST) { rdata := reg_tohost; }
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is (PCR_K0) { rdata := reg_k0; }
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is (PCR_K1) { rdata := reg_k1; }
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is (PCR_PTBR) { rdata := Cat(Bits(0,64-PADDR_BITS), reg_ptbr); }
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is (PCR_VECBANK) { rdata := Cat(Bits(0, 56), reg_vecbank) }
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is (PCR_VECCFG) { rdata := Cat(Bits(0, 40), io.vec_nfregs, io.vec_nxregs, io.vec_appvl) }
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}
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rdata := io.status // raddr === PCR_STATUS
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switch (raddr) {
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is (PCR_EPC) { rdata := Cat(Fill(64-VADDR_BITS-1, reg_epc(VADDR_BITS)), reg_epc); }
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is (PCR_BADVADDR) { rdata := Cat(Fill(64-VADDR_BITS-1, reg_badvaddr(VADDR_BITS)), reg_badvaddr); }
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is (PCR_EVEC) { rdata := Cat(Fill(64-VADDR_BITS, reg_ebase(VADDR_BITS-1)), reg_ebase); }
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is (PCR_COUNT) { rdata := Cat(Fill(32, reg_count(31)), reg_count); }
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is (PCR_COMPARE) { rdata := Cat(Fill(32, reg_compare(31)), reg_compare); }
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is (PCR_CAUSE) { rdata := Cat(reg_cause(5), Bits(0,58), reg_cause(4,0)); }
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is (PCR_COREID) { rdata := Bits(COREID,64); }
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is (PCR_IMPL) { rdata := Bits(2) }
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is (PCR_FROMHOST) { rdata := reg_fromhost; }
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is (PCR_TOHOST) { rdata := reg_tohost; }
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is (PCR_K0) { rdata := reg_k0; }
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is (PCR_K1) { rdata := reg_k1; }
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is (PCR_PTBR) { rdata := Cat(Bits(0,64-PADDR_BITS), reg_ptbr); }
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is (PCR_VECBANK) { rdata := Cat(Bits(0, 56), reg_vecbank) }
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is (PCR_VECCFG) { rdata := Cat(Bits(0, 40), io.vec_nfregs, io.vec_nxregs, io.vec_appvl) }
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}
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}
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@ -10,15 +10,18 @@ class ioHost(w: Int, view: List[String] = null) extends Bundle(view)
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val out = new ioDecoupled()(Bits(width = w))
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}
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class PCRReq extends Bundle
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{
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val rw = Bool()
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val addr = Bits(width = 5)
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val data = Bits(width = 64)
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}
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class ioHTIF extends Bundle
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{
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val reset = Bool(INPUT)
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val pcr_wen = Bool(INPUT)
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val pcr_ren = Bool(INPUT)
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val pcr_rdy = Bool(OUTPUT)
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val pcr_addr = Bits(5, INPUT)
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val pcr_wdata = Bits(64, INPUT)
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val pcr_rdata = Bits(64, OUTPUT)
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val pcr_req = (new ioDecoupled) { new PCRReq }.flip
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val pcr_rep = (new ioPipe) { Bits(width = 64) }
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}
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class rocketHTIF(w: Int, ncores: Int) extends Component with FourStateCoherence
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@ -170,27 +173,30 @@ class rocketHTIF(w: Int, ncores: Int) extends Component with FourStateCoherence
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pcr_done := Bool(false)
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val pcr_mux = (new Mux1H(ncores)) { Bits(width = 64) }
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for (i <- 0 until ncores) {
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val me = pcr_coreid === UFix(i)
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io.cpu(i).pcr_wen := Reg(state === state_pcr && cmd === cmd_writecr && me, resetVal = Bool(false))
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io.cpu(i).pcr_addr := Reg(pcr_addr)
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io.cpu(i).pcr_wdata := Reg(pcr_wdata)
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val my_reset = Reg(resetVal = Bool(true))
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when (io.cpu(i).pcr_wen && io.cpu(i).pcr_rdy) {
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when (io.cpu(i).pcr_addr === PCR_RESET) { my_reset := io.cpu(i).pcr_wdata(0) }
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pcr_done := Bool(true)
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}
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io.cpu(i).reset := my_reset
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io.cpu(i).pcr_ren := Reg(state === state_pcr && cmd === cmd_readcr && me, resetVal = Bool(false))
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val rdata = Reg() { Bits() }
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when (io.cpu(i).pcr_ren && io.cpu(i).pcr_rdy) {
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rdata := io.cpu(i).pcr_rdata
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when (io.cpu(i).pcr_addr === PCR_RESET) { rdata := my_reset }
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val cpu = io.cpu(i)
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val me = pcr_coreid === UFix(i)
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cpu.pcr_req.valid := state === state_pcr && me
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cpu.pcr_req.bits.rw := cmd === cmd_writecr
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cpu.pcr_req.bits.addr := pcr_addr
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cpu.pcr_req.bits.data := pcr_wdata
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cpu.reset := my_reset
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when (cpu.pcr_req.valid && cpu.pcr_req.ready && cpu.pcr_req.bits.rw) {
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pcr_done := Bool(true)
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when (cpu.pcr_req.bits.addr === PCR_RESET) {
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my_reset := cpu.pcr_req.bits.data(0)
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}
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}
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pcr_mux.io.sel(i) := Reg(me)
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pcr_mux.io.in(i) := rdata
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when (cpu.pcr_rep.valid) {
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pcr_done := Bool(true)
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rdata := cpu.pcr_rep.bits
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}
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pcr_mux.io.sel(i) := me
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pcr_mux.io.in(i) := Mux(pcr_addr === PCR_RESET, my_reset, rdata)
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}
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val tx_cmd = Mux(nack, cmd_nack, cmd_ack)
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