removed AddressSpaceConstants, CacheConstants, and TileLinkSizeConstants

2014-04-01 17:15:46 -07:00
parent ebdc0a2692
commit 910b3b203a
10 changed files with 135 additions and 126 deletions
--- a/rocket/src/main/scala/btb.scala
+++ b/rocket/src/main/scala/btb.scala
@@ -3,10 +3,9 @@ package rocket
 import Chisel._
 import Util._
 import Node._
-import uncore.constants.AddressConstants._

-case class BTBConfig(entries: Int, nras: Int = 0) {
-  val matchBits = PGIDX_BITS
+case class BTBConfig(as: uncore.AddressSpaceConfiguration, entries: Int, nras: Int = 0) {
+  val matchBits = as.pgIdxBits
  val pages0 = 1 max log2Up(entries) // is this sensible?
  val pages = (pages0+1)/2*2 // control logic assumes 2 divides pages
  val opaqueBits = log2Up(entries)
@@ -56,9 +55,9 @@ class BHT(implicit conf: BTBConfig) {

 class BTBUpdate(implicit conf: BTBConfig) extends Bundle {
  val prediction = Valid(new BTBResp)
-  val pc = UInt(width = VADDR_BITS)
-  val target = UInt(width = VADDR_BITS)
-  val returnAddr = UInt(width = VADDR_BITS)
+  val pc = UInt(width = conf.as.vaddrBits)
+  val target = UInt(width = conf.as.vaddrBits)
+  val returnAddr = UInt(width = conf.as.vaddrBits)
  val taken = Bool()
  val isJump = Bool()
  val isCall = Bool()
@@ -70,7 +69,7 @@ class BTBUpdate(implicit conf: BTBConfig) extends Bundle {

 class BTBResp(implicit conf: BTBConfig) extends Bundle {
  val taken = Bool()
-  val target = UInt(width = VADDR_BITS)
+  val target = UInt(width = conf.as.vaddrBits)
  val entry = UInt(width = conf.opaqueBits)
  val bht = new BHTResp

@@ -80,7 +79,7 @@ class BTBResp(implicit conf: BTBConfig) extends Bundle {
 // fully-associative branch target buffer
 class BTB(implicit conf: BTBConfig) extends Module {
  val io = new Bundle {
-    val req = UInt(INPUT, VADDR_BITS)
+    val req = UInt(INPUT, conf.as.vaddrBits)
    val resp = Valid(new BTBResp)
    val update = Valid(new BTBUpdate).flip
    val invalidate = Bool(INPUT)
@@ -91,7 +90,7 @@ class BTB(implicit conf: BTBConfig) extends Module {
  val idxPages = Vec.fill(conf.entries){Reg(UInt(width=log2Up(conf.pages)))}
  val tgts = Vec.fill(conf.entries){Reg(UInt(width=conf.matchBits))}
  val tgtPages = Vec.fill(conf.entries){Reg(UInt(width=log2Up(conf.pages)))}
-  val pages = Vec.fill(conf.pages){Reg(UInt(width=VADDR_BITS-conf.matchBits))}
+  val pages = Vec.fill(conf.pages){Reg(UInt(width=conf.as.vaddrBits-conf.matchBits))}
  val pageValid = Vec.fill(conf.pages){Reg(init=Bool(false))}
  val idxPagesOH = idxPages.map(UIntToOH(_)(conf.pages-1,0))
  val tgtPagesOH = tgtPages.map(UIntToOH(_)(conf.pages-1,0))
--- a/rocket/src/main/scala/core.scala
+++ b/rocket/src/main/scala/core.scala
@@ -3,14 +3,13 @@ package rocket
 import Chisel._
 import Util._
 import uncore.HTIFIO
-import uncore.constants.MemoryOpConstants._

 class RocketIO(implicit conf: RocketConfiguration) extends Bundle
 {
  val host = new HTIFIO(conf.tl.ln.nClients)
  val imem = new CPUFrontendIO()(conf.icache)
  val dmem = new HellaCacheIO()(conf.dcache)
-  val ptw = new DatapathPTWIO().flip
+  val ptw = new DatapathPTWIO()(conf.as).flip
  val rocc = new RoCCInterface().flip
 }

--- a/rocket/src/main/scala/csr.scala
+++ b/rocket/src/main/scala/csr.scala
@@ -4,7 +4,7 @@ import Chisel._
 import Util._
 import Node._
 import uncore.HTIFIO
-import uncore.constants.AddressConstants._
+import uncore.AddressSpaceConfiguration
 import scala.math._

 class Status extends Bundle {
@@ -45,14 +45,14 @@ class CSRFile(implicit conf: RocketConfiguration) extends Module
    }
    
    val status = new Status().asOutput
-    val ptbr = UInt(OUTPUT, PADDR_BITS)
-    val evec = UInt(OUTPUT, VADDR_BITS+1)
+    val ptbr = UInt(OUTPUT, conf.as.paddrBits)
+    val evec = UInt(OUTPUT, conf.as.vaddrBits+1)
    val exception = Bool(INPUT)
    val retire = UInt(INPUT, log2Up(1+conf.retireWidth))
    val uarch_counters = Vec.fill(16)(UInt(INPUT, log2Up(1+conf.retireWidth)))
    val cause = UInt(INPUT, conf.xprlen)
    val badvaddr_wen = Bool(INPUT)
-    val pc = UInt(INPUT, VADDR_BITS+1)
+    val pc = UInt(INPUT, conf.as.vaddrBits+1)
    val sret = Bool(INPUT)
    val fatc = Bool(OUTPUT)
    val replay = Bool(OUTPUT)
@@ -62,16 +62,16 @@ class CSRFile(implicit conf: RocketConfiguration) extends Module
    val rocc = new RoCCInterface().flip
  }
 
-  val reg_epc = Reg(Bits(width = VADDR_BITS+1))
-  val reg_badvaddr = Reg(Bits(width = VADDR_BITS))
-  val reg_evec = Reg(Bits(width = VADDR_BITS))
+  val reg_epc = Reg(Bits(width = conf.as.vaddrBits+1))
+  val reg_badvaddr = Reg(Bits(width = conf.as.vaddrBits))
+  val reg_evec = Reg(Bits(width = conf.as.vaddrBits))
  val reg_compare = Reg(Bits(width = 32))
  val reg_cause = Reg(Bits(width = conf.xprlen))
  val reg_tohost = Reg(init=Bits(0, conf.xprlen))
  val reg_fromhost = Reg(init=Bits(0, conf.xprlen))
  val reg_sup0 = Reg(Bits(width = conf.xprlen))
  val reg_sup1 = Reg(Bits(width = conf.xprlen))
-  val reg_ptbr = Reg(UInt(width = PADDR_BITS))
+  val reg_ptbr = Reg(UInt(width = conf.as.paddrBits))
  val reg_stats = Reg(init=Bool(false))
  val reg_status = Reg(new Status) // reset down below
  val reg_time = WideCounter(conf.xprlen)
@@ -130,7 +130,7 @@ class CSRFile(implicit conf: RocketConfiguration) extends Module

  when (io.badvaddr_wen) {
    val wdata = io.rw.wdata
-    val (upper, lower) = Split(wdata, VADDR_BITS)
+    val (upper, lower) = Split(wdata, conf.as.vaddrBits)
    val sign = Mux(lower.toSInt < SInt(0), upper.andR, upper.orR)
    reg_badvaddr := Cat(sign, lower).toSInt
  }
@@ -161,7 +161,7 @@ class CSRFile(implicit conf: RocketConfiguration) extends Module
  when (host_pcr_req_fire && !host_pcr_bits.rw && decoded_addr(CSRs.tohost)) { reg_tohost := UInt(0) }

  val read_impl = Bits(2)
-  val read_ptbr = reg_ptbr(PADDR_BITS-1,PGIDX_BITS) << PGIDX_BITS
+  val read_ptbr = reg_ptbr(conf.as.paddrBits-1, conf.as.pgIdxBits) << conf.as.pgIdxBits

  val read_mapping = collection.mutable.LinkedHashMap[Int,Bits](
    CSRs.fflags -> (if (!conf.fpu.isEmpty) reg_fflags else UInt(0)),
@@ -213,8 +213,8 @@ class CSRFile(implicit conf: RocketConfiguration) extends Module
    when (decoded_addr(CSRs.fflags))   { reg_fflags := wdata }
    when (decoded_addr(CSRs.frm))      { reg_frm := wdata }
    when (decoded_addr(CSRs.fcsr))     { reg_fflags := wdata; reg_frm := wdata >> reg_fflags.getWidth }
-    when (decoded_addr(CSRs.epc))      { reg_epc := wdata(VADDR_BITS,0).toSInt }
-    when (decoded_addr(CSRs.evec))     { reg_evec := wdata(VADDR_BITS-1,0).toSInt }
+    when (decoded_addr(CSRs.epc))      { reg_epc := wdata(conf.as.vaddrBits,0).toSInt }
+    when (decoded_addr(CSRs.evec))     { reg_evec := wdata(conf.as.vaddrBits-1,0).toSInt }
    when (decoded_addr(CSRs.count))    { reg_time := wdata.toUInt }
    when (decoded_addr(CSRs.compare))  { reg_compare := wdata(31,0).toUInt; r_irq_timer := Bool(false) }
    when (decoded_addr(CSRs.fromhost)) { when (reg_fromhost === UInt(0) || !host_pcr_req_fire) { reg_fromhost := wdata } }
@@ -222,7 +222,7 @@ class CSRFile(implicit conf: RocketConfiguration) extends Module
    when (decoded_addr(CSRs.clear_ipi)){ r_irq_ipi := wdata(0) }
    when (decoded_addr(CSRs.sup0))     { reg_sup0 := wdata }
    when (decoded_addr(CSRs.sup1))     { reg_sup1 := wdata }
-    when (decoded_addr(CSRs.ptbr))     { reg_ptbr := Cat(wdata(PADDR_BITS-1, PGIDX_BITS), Bits(0, PGIDX_BITS)).toUInt }
+    when (decoded_addr(CSRs.ptbr))     { reg_ptbr := Cat(wdata(conf.as.paddrBits-1, conf.as.pgIdxBits), Bits(0, conf.as.pgIdxBits)).toUInt }
    when (decoded_addr(CSRs.stats))    { reg_stats := wdata(0) }
  }

--- a/rocket/src/main/scala/dpath.scala
+++ b/rocket/src/main/scala/dpath.scala
@@ -4,10 +4,10 @@ import Chisel._
 import Instructions._
 import Util._
 import uncore.HTIFIO
-import uncore.constants.AddressConstants._

 class Datapath(implicit conf: RocketConfiguration) extends Module
 {
+  implicit val as = conf.as
  val io = new Bundle {
    val host  = new HTIFIO(conf.tl.ln.nClients)
    val ctrl  = (new CtrlDpathIO).flip
@@ -158,10 +158,10 @@ class Datapath(implicit conf: RocketConfiguration) extends Module
  io.fpu.fromint_data := ex_rs(0)

  def vaSign(a0: UInt, ea: Bits) = {
-    // efficient means to compress 64-bit VA into VADDR_BITS+1 bits
-    // (VA is bad if VA(VADDR_BITS) != VA(VADDR_BITS-1))
-    val a = a0 >> VADDR_BITS-1
-    val e = ea(VADDR_BITS,VADDR_BITS-1)
+    // efficient means to compress 64-bit VA into conf.as.vaddrBits+1 bits
+    // (VA is bad if VA(conf.as.vaddrBits) != VA(conf.as.vaddrBits-1))
+    val a = a0 >> conf.as.vaddrBits-1
+    val e = ea(conf.as.vaddrBits,conf.as.vaddrBits-1)
    Mux(a === UInt(0) || a === UInt(1), e != UInt(0),
    Mux(a === SInt(-1) || a === SInt(-2), e === SInt(-1),
    e(0)))
@@ -169,7 +169,7 @@ class Datapath(implicit conf: RocketConfiguration) extends Module

  // D$ request interface (registered inside D$ module)
  // other signals (req_val, req_rdy) connect to control module  
-  io.dmem.req.bits.addr := Cat(vaSign(ex_rs(0), alu.io.adder_out), alu.io.adder_out(VADDR_BITS-1,0)).toUInt
+  io.dmem.req.bits.addr := Cat(vaSign(ex_rs(0), alu.io.adder_out), alu.io.adder_out(conf.as.vaddrBits-1,0)).toUInt
  io.dmem.req.bits.tag := Cat(io.ctrl.ex_waddr, io.ctrl.ex_fp_val)
  require(io.dmem.req.bits.tag.getWidth >= 6)
  require(conf.dcacheReqTagBits >= 6)
@@ -240,7 +240,7 @@ class Datapath(implicit conf: RocketConfiguration) extends Module
  val mem_br_target = mem_reg_pc +
    Mux(io.ctrl.mem_branch && io.ctrl.mem_br_taken, imm(IMM_SB, mem_reg_inst),
    Mux(!io.ctrl.mem_jalr && !io.ctrl.mem_branch, imm(IMM_UJ, mem_reg_inst), SInt(4)))
-  val mem_npc = Mux(io.ctrl.mem_jalr, Cat(vaSign(mem_reg_wdata, mem_reg_wdata), mem_reg_wdata(VADDR_BITS-1,0)), mem_br_target)
+  val mem_npc = Mux(io.ctrl.mem_jalr, Cat(vaSign(mem_reg_wdata, mem_reg_wdata), mem_reg_wdata(conf.as.vaddrBits-1,0)), mem_br_target)
  io.ctrl.mem_misprediction := mem_npc != Mux(io.ctrl.ex_valid, ex_reg_pc, id_pc)
  io.ctrl.mem_rs1_ra := mem_reg_inst(19,15) === 1
  val mem_int_wdata = Mux(io.ctrl.mem_jalr, mem_br_target, mem_reg_wdata)
--- a/rocket/src/main/scala/icache.scala
+++ b/rocket/src/main/scala/icache.scala
@@ -5,33 +5,37 @@ import uncore._
 import Util._

 case class ICacheConfig(sets: Int, assoc: Int,
-                        ibytes: Int = 4,
-                        ntlb: Int = 8, btb: BTBConfig = BTBConfig(8),
+                        ibytes: Int = 4, rowbytes: Int = 64,
+                        ntlb: Int = 8, 
                        tl: TileLinkConfiguration,
+                        as: AddressSpaceConfiguration,
+                        btb: BTBConfig,
                        code: Code = new IdentityCode)
 {
  val w = 1

  val dm = assoc == 1
  val lines = sets * assoc
-  val databits = tl.dataBits
  val idxbits = log2Up(sets)
-  val offbits = OFFSET_BITS
+  val offbits = log2Up(tl.dataBits/8)
+  val rowbits = rowbytes*8
+  val rowoffbits = log2Up(rowbytes)
  val untagbits = idxbits + offbits
-  val tagbits = PADDR_BITS - untagbits
-  def refillcycles = CACHE_DATA_SIZE_IN_BYTES*8/tl.dataBits
+  val tagbits = as.paddrBits - untagbits
+  val refillcycles = tl.dataBits/rowbits

  require(isPow2(sets) && isPow2(assoc))
  require(isPow2(w) && isPow2(ibytes))
-  require(PGIDX_BITS >= untagbits)
+  require(as.pgIdxBits >= untagbits)
 }

-class FrontendReq extends Bundle {
-  val pc = UInt(width = VADDR_BITS+1)
+class FrontendReq()(implicit conf: ICacheConfig) extends Bundle {
+  val pc = UInt(width = conf.as.vaddrBits+1)
+  override def clone = new FrontendReq().asInstanceOf[this.type]
 }

 class FrontendResp(implicit conf: ICacheConfig) extends Bundle {
-  val pc = UInt(width = VADDR_BITS+1)  // ID stage PC
+  val pc = UInt(width = conf.as.vaddrBits+1)  // ID stage PC
  val data = Bits(width = conf.ibytes*8)
  val xcpt_ma = Bool()
  val xcpt_if = Bool()
@@ -44,12 +48,13 @@ class CPUFrontendIO(implicit conf: ICacheConfig) extends Bundle {
  val resp = Decoupled(new FrontendResp).flip
  val btb_resp = Valid(new BTBResp()(conf.btb)).flip
  val btb_update = Valid(new BTBUpdate()(conf.btb))
-  val ptw = new TLBPTWIO().flip
+  val ptw = new TLBPTWIO()(conf.as).flip
  val invalidate = Bool(OUTPUT)
 }

-class Frontend(implicit c: ICacheConfig, tl: TileLinkConfiguration) extends Module
+class Frontend(implicit c: ICacheConfig) extends Module
 {
+  implicit val (tl, as) = (c.tl, c.as)
  val io = new Bundle {
    val cpu = new CPUFrontendIO()(c).flip
    val mem = new UncachedTileLinkIO
@@ -68,13 +73,14 @@ class Frontend(implicit c: ICacheConfig, tl: TileLinkConfiguration) extends Modu
  val s2_btb_resp_bits = Reg(btb.io.resp.bits.clone)
  val s2_xcpt_if = Reg(init=Bool(false))

-  val btbTarget = Cat(btb.io.resp.bits.target(VADDR_BITS-1), btb.io.resp.bits.target)
+  val msb = c.as.vaddrBits-1
+  val btbTarget = Cat(btb.io.resp.bits.target(msb), btb.io.resp.bits.target)
  val pcp4_0 = s1_pc + UInt(c.ibytes)
-  val pcp4 = Cat(s1_pc(VADDR_BITS-1) & pcp4_0(VADDR_BITS-1), pcp4_0(VADDR_BITS-1,0))
+  val pcp4 = Cat(s1_pc(msb) & pcp4_0(msb), pcp4_0(msb,0))
  val icmiss = s2_valid && !icache.io.resp.valid
  val predicted_npc = Mux(btb.io.resp.bits.taken, btbTarget, pcp4)
  val npc = Mux(icmiss, s2_pc, predicted_npc).toUInt
-  val s0_same_block = !icmiss && !io.cpu.req.valid && !btb.io.resp.bits.taken && ((pcp4 & (c.databits/8)) === (s1_pc & (c.databits/8)))
+  val s0_same_block = !icmiss && !io.cpu.req.valid && !btb.io.resp.bits.taken && ((pcp4 & c.rowbytes) === (s1_pc & c.rowbytes))

  val stall = io.cpu.resp.valid && !io.cpu.resp.ready
  when (!stall) {
@@ -100,7 +106,7 @@ class Frontend(implicit c: ICacheConfig, tl: TileLinkConfiguration) extends Modu

  tlb.io.ptw <> io.cpu.ptw
  tlb.io.req.valid := !stall && !icmiss
-  tlb.io.req.bits.vpn := s1_pc >> UInt(PGIDX_BITS)
+  tlb.io.req.bits.vpn := s1_pc >> UInt(c.as.pgIdxBits)
  tlb.io.req.bits.asid := UInt(0)
  tlb.io.req.bits.passthrough := Bool(false)
  tlb.io.req.bits.instruction := Bool(true)
@@ -115,7 +121,7 @@ class Frontend(implicit c: ICacheConfig, tl: TileLinkConfiguration) extends Modu

  io.cpu.resp.valid := s2_valid && (s2_xcpt_if || icache.io.resp.valid)
  io.cpu.resp.bits.pc := s2_pc & SInt(-c.ibytes) // discard PC LSBs
-  io.cpu.resp.bits.data := icache.io.resp.bits.datablock >> (s2_pc(log2Up(c.databits/8)-1,log2Up(c.ibytes)) << log2Up(c.ibytes*8))
+  io.cpu.resp.bits.data := icache.io.resp.bits.datablock >> (s2_pc(log2Up(c.rowbytes)-1,log2Up(c.ibytes)) << log2Up(c.ibytes*8))
  io.cpu.resp.bits.xcpt_ma := s2_pc(log2Up(c.ibytes)-1,0) != UInt(0)
  io.cpu.resp.bits.xcpt_if := s2_xcpt_if

@@ -123,15 +129,16 @@ class Frontend(implicit c: ICacheConfig, tl: TileLinkConfiguration) extends Modu
  io.cpu.btb_resp.bits := s2_btb_resp_bits
 }

-class ICacheReq extends Bundle {
-  val idx = UInt(width = PGIDX_BITS)
-  val ppn = UInt(width = PPN_BITS) // delayed one cycle
+class ICacheReq(implicit c: ICacheConfig)  extends Bundle {
+  val idx = UInt(width = c.as.pgIdxBits)
+  val ppn = UInt(width = c.as.ppnBits) // delayed one cycle
  val kill = Bool() // delayed one cycle
+  override def clone = new ICacheReq().asInstanceOf[this.type]
 }

 class ICacheResp(implicit c: ICacheConfig) extends Bundle {
  val data = Bits(width = c.ibytes*8)
-  val datablock = Bits(width = c.databits)
+  val datablock = Bits(width = c.rowbits)
  override def clone = new ICacheResp().asInstanceOf[this.type]
 }

@@ -152,11 +159,11 @@ class ICache(implicit c: ICacheConfig) extends Module
  val rdy = Bool()

  val s2_valid = Reg(init=Bool(false))
-  val s2_addr = Reg(UInt(width = PADDR_BITS))
+  val s2_addr = Reg(UInt(width = c.as.paddrBits))
  val s2_any_tag_hit = Bool()

  val s1_valid = Reg(init=Bool(false))
-  val s1_pgoff = Reg(UInt(width = PGIDX_BITS))
+  val s1_pgoff = Reg(UInt(width = c.as.pgIdxBits))
  val s1_addr = Cat(io.req.bits.ppn, s1_pgoff).toUInt
  val s1_tag = s1_addr(c.tagbits+c.untagbits-1,c.untagbits)

@@ -231,7 +238,7 @@ class ICache(implicit c: ICacheConfig) extends Module
  s2_any_tag_hit := s2_tag_hit.reduceLeft(_||_) && !s2_disparity.reduceLeft(_||_)

  for (i <- 0 until c.assoc) {
-    val data_array = Mem(Bits(width = c.code.width(c.databits)), c.sets*c.refillcycles, seqRead = true)
+    val data_array = Mem(Bits(width = c.code.width(c.rowbits)), c.sets*c.refillcycles, seqRead = true)
    val s1_raddr = Reg(UInt())
    when (io.mem.grant.valid && repl_way === UInt(i)) {
      val d = io.mem.grant.bits.payload.data
@@ -245,7 +252,7 @@ class ICache(implicit c: ICacheConfig) extends Module
    // if s1_tag_match is critical, replace with partial tag check
    when (s1_valid && rdy && !stall && (Bool(c.dm) || s1_tag_match(i))) { s2_dout(i) := data_array(s1_raddr) }
  }
-  val s2_dout_word = s2_dout.map(x => (x >> (s2_offset(log2Up(c.databits/8)-1,log2Up(c.ibytes)) << log2Up(c.ibytes*8)))(c.ibytes*8-1,0))
+  val s2_dout_word = s2_dout.map(x => (x >> (s2_offset(log2Up(c.rowbytes)-1,log2Up(c.ibytes)) << log2Up(c.ibytes*8)))(c.ibytes*8-1,0))
  io.resp.bits.data := Mux1H(s2_tag_hit, s2_dout_word)
  io.resp.bits.datablock := Mux1H(s2_tag_hit, s2_dout)

--- a/rocket/src/main/scala/nbdcache.scala
+++ b/rocket/src/main/scala/nbdcache.scala
@@ -7,41 +7,41 @@ import Util._
 case class DCacheConfig(sets: Int, ways: Int,
                        nmshr: Int, nrpq: Int, nsdq: Int, ntlb: Int,
                        tl: TileLinkConfiguration,
+                        as: AddressSpaceConfiguration,
+                        reqtagbits: Int, databits: Int,
+                        rowwords: Int = 8,
                        code: Code = new IdentityCode,
-                        narrowRead: Boolean = true,
-                        reqtagbits: Int = -1, databits: Int = -1)
+                        narrowRead: Boolean = true)
 {
  require(states > 0)
-  require(OFFSET_BITS == log2Up(CACHE_DATA_SIZE_IN_BYTES))
-  require(OFFSET_BITS <= ACQUIRE_WRITE_MASK_BITS)
-  require(log2Up(OFFSET_BITS) <= ACQUIRE_SUBWORD_ADDR_BITS)
  require(isPow2(sets))
  require(isPow2(ways)) // TODO: relax this
  def states = tl.co.nClientStates
  def lines = sets*ways
  def dm = ways == 1
-  def ppnbits = PADDR_BITS - PGIDX_BITS
-  def vpnbits = VADDR_BITS - PGIDX_BITS
-  def pgidxbits = PGIDX_BITS
-  def offbits = OFFSET_BITS
+  def offbits = log2Up(tl.dataBits/8)
+  def ppnbits = as.ppnBits
+  def vpnbits = as.vpnBits
+  def pgidxbits = as.pgIdxBits
  def maxaddrbits = ppnbits.max(vpnbits+1) + pgidxbits
-  def paddrbits = ppnbits + pgidxbits
+  def paddrbits = as.paddrBits
  def lineaddrbits = paddrbits - offbits
  def idxbits = log2Up(sets)
  def waybits = log2Up(ways)
  def untagbits = offbits + idxbits
  def tagbits = lineaddrbits - idxbits
-  def ramoffbits = log2Up(tl.dataBits/8)
  def databytes = databits/8
  def wordoffbits = log2Up(databytes)
-  def isNarrowRead = narrowRead && databits*ways % tl.dataBits == 0
-  def refillcycles = CACHE_DATA_SIZE_IN_BYTES*8/tl.dataBits
+  def rowbits = rowwords*databits
+  def rowbytes = rowwords*databytes
+  def rowoffbits = log2Up(rowbytes)
+  def refillcycles = tl.dataBits/(rowwords*databits)
+  def isNarrowRead = narrowRead && databits*ways % rowbits == 0
  val statebits = log2Up(states)
  val metabits = statebits + tagbits
  val encdatabits = code.width(databits)
  val encmetabits = code.width(metabits)
-  val wordsperrow = tl.dataBits/databits
-  val bitsperrow = wordsperrow*encdatabits
+  val encrowbits = rowwords*encdatabits
  val lrsc_cycles = 32 // ISA requires 16-insn LRSC sequences to succeed
 }

@@ -118,8 +118,8 @@ class DataReadReq(implicit val conf: DCacheConfig) extends DCacheBundle {
 class DataWriteReq(implicit val conf: DCacheConfig) extends DCacheBundle {
  val way_en = Bits(width = conf.ways)
  val addr   = Bits(width = conf.untagbits)
-  val wmask  = Bits(width = conf.wordsperrow)
-  val data   = Bits(width = conf.bitsperrow)
+  val wmask  = Bits(width = conf.rowwords)
+  val data   = Bits(width = conf.encrowbits)
 }

 class InternalProbe(implicit conf: DCacheConfig) extends Probe()(conf.tl) {
@@ -273,7 +273,7 @@ class MSHR(id: Int)(implicit conf: DCacheConfig) extends Module {

  io.idx_match := (state != s_invalid) && idx_match
  io.mem_resp := req
-  io.mem_resp.addr := (if(conf.refillcycles > 1) Cat(req_idx, refill_count) else req_idx) << conf.ramoffbits
+  io.mem_resp.addr := (if(conf.refillcycles > 1) Cat(req_idx, refill_count) else req_idx) << conf.rowoffbits
  io.tag := req.addr >> conf.untagbits
  io.req_pri_rdy := state === s_invalid
  io.req_sec_rdy := sec_rdy && rpq.io.enq.ready
@@ -426,7 +426,7 @@ class WritebackUnit(implicit conf: DCacheConfig) extends Module {
    val req = Decoupled(new WritebackReq()).flip
    val meta_read = Decoupled(new MetaReadReq)
    val data_req = Decoupled(new DataReadReq())
-    val data_resp = Bits(INPUT, conf.bitsperrow)
+    val data_resp = Bits(INPUT, conf.encrowbits)
    val release = Decoupled(new Release)
  }

@@ -471,7 +471,7 @@ class WritebackUnit(implicit conf: DCacheConfig) extends Module {
  io.data_req.valid := fire
  io.data_req.bits.way_en := req.way_en
  io.data_req.bits.addr := (if(conf.refillcycles > 1) Cat(req.idx, cnt(log2Up(conf.refillcycles)-1,0)) 
-                            else req.idx) << conf.ramoffbits
+                            else req.idx) << conf.rowoffbits

  io.release.valid := valid && r2_data_req_fired
  io.release.bits.r_type := req.r_type
@@ -599,39 +599,39 @@ class DataArray(implicit conf: DCacheConfig) extends Module {
  val io = new Bundle {
    val read = Decoupled(new DataReadReq).flip
    val write = Decoupled(new DataWriteReq).flip
-    val resp = Vec.fill(conf.ways){Bits(OUTPUT, conf.bitsperrow)}
+    val resp = Vec.fill(conf.ways){Bits(OUTPUT, conf.encrowbits)}
  }

-  val waddr = io.write.bits.addr >> conf.ramoffbits
-  val raddr = io.read.bits.addr >> conf.ramoffbits
+  val waddr = io.write.bits.addr >> conf.rowoffbits
+  val raddr = io.read.bits.addr >> conf.rowoffbits

  if (conf.isNarrowRead) {
-    for (w <- 0 until conf.ways by conf.wordsperrow) {
-      val wway_en = io.write.bits.way_en(w+conf.wordsperrow-1,w)
-      val rway_en = io.read.bits.way_en(w+conf.wordsperrow-1,w)
-      val resp = Vec.fill(conf.wordsperrow){Bits(width = conf.bitsperrow)}
+    for (w <- 0 until conf.ways by conf.rowwords) {
+      val wway_en = io.write.bits.way_en(w+conf.rowwords-1,w)
+      val rway_en = io.read.bits.way_en(w+conf.rowwords-1,w)
+      val resp = Vec.fill(conf.rowwords){Bits(width = conf.encrowbits)}
      val r_raddr = RegEnable(io.read.bits.addr, io.read.valid)
      for (p <- 0 until resp.size) {
-        val array = Mem(Bits(width=conf.bitsperrow), conf.sets*conf.refillcycles, seqRead = true)
+        val array = Mem(Bits(width=conf.encrowbits), conf.sets*conf.refillcycles, seqRead = true)
        when (wway_en.orR && io.write.valid && io.write.bits.wmask(p)) {
-          val data = Fill(conf.wordsperrow, io.write.bits.data(conf.encdatabits*(p+1)-1,conf.encdatabits*p))
+          val data = Fill(conf.rowwords, io.write.bits.data(conf.encdatabits*(p+1)-1,conf.encdatabits*p))
          val mask = FillInterleaved(conf.encdatabits, wway_en)
          array.write(waddr, data, mask)
        }
        resp(p) := array(RegEnable(raddr, rway_en.orR && io.read.valid))
      }
-      for (dw <- 0 until conf.wordsperrow) {
+      for (dw <- 0 until conf.rowwords) {
        val r = AVec(resp.map(_(conf.encdatabits*(dw+1)-1,conf.encdatabits*dw)))
        val resp_mux =
          if (r.size == 1) r
-          else AVec(r(r_raddr(conf.ramoffbits-1,conf.wordoffbits)), r.tail:_*)
+          else AVec(r(r_raddr(conf.rowoffbits-1,conf.wordoffbits)), r.tail:_*)
        io.resp(w+dw) := resp_mux.toBits
      }
    }
  } else {
    val wmask = FillInterleaved(conf.encdatabits, io.write.bits.wmask)
    for (w <- 0 until conf.ways) {
-      val array = Mem(Bits(width=conf.bitsperrow), conf.sets*conf.refillcycles, seqRead = true)
+      val array = Mem(Bits(width=conf.encrowbits), conf.sets*conf.refillcycles, seqRead = true)
      when (io.write.bits.way_en(w) && io.write.valid) {
        array.write(waddr, io.write.bits.data, wmask)
      }
@@ -723,7 +723,7 @@ class HellaCacheIO(implicit conf: DCacheConfig) extends Bundle {
  val resp = Valid(new HellaCacheResp).flip
  val replay_next = Valid(Bits(width = conf.reqtagbits)).flip
  val xcpt = (new HellaCacheExceptions).asInput
-  val ptw = (new TLBPTWIO).flip
+  val ptw = new TLBPTWIO()(conf.as).flip
  val ordered = Bool(INPUT)
 }

@@ -766,7 +766,7 @@ class HellaCache(implicit conf: DCacheConfig) extends Module {
  val s1_sc = s1_req.cmd === M_XSC
  val s1_readwrite = s1_read || s1_write || isPrefetch(s1_req.cmd)

-  val dtlb = Module(new TLB(8))
+  val dtlb = Module(new TLB(8)(conf.as))
  dtlb.io.ptw <> io.cpu.ptw
  dtlb.io.req.valid := s1_valid_masked && s1_readwrite && !s1_req.phys
  dtlb.io.req.bits.passthrough := s1_req.phys
@@ -834,7 +834,7 @@ class HellaCache(implicit conf: DCacheConfig) extends Module {
  data.io.write.valid := writeArb.io.out.valid
  writeArb.io.out.ready := data.io.write.ready
  data.io.write.bits := writeArb.io.out.bits
-  val wdata_encoded = (0 until conf.wordsperrow).map(i => conf.code.encode(writeArb.io.out.bits.data(conf.databits*(i+1)-1,conf.databits*i)))
+  val wdata_encoded = (0 until conf.rowwords).map(i => conf.code.encode(writeArb.io.out.bits.data(conf.databits*(i+1)-1,conf.databits*i)))
  data.io.write.bits.data := AVec(wdata_encoded).toBits

  // tag read for new requests
@@ -885,9 +885,9 @@ class HellaCache(implicit conf: DCacheConfig) extends Module {
  }
  when (io.cpu.ptw.sret) { lrsc_count := 0 }

-  val s2_data = Vec.fill(conf.ways){Bits(width = conf.bitsperrow)}
+  val s2_data = Vec.fill(conf.ways){Bits(width = conf.encrowbits)}
  for (w <- 0 until conf.ways) {
-    val regs = Vec.fill(conf.wordsperrow){Reg(Bits(width = conf.encdatabits))}
+    val regs = Vec.fill(conf.rowwords){Reg(Bits(width = conf.encdatabits))}
    val en1 = s1_clk_en && s1_tag_eq_way(w)
    for (i <- 0 until regs.size) {
      val en = en1 && (Bool(i == 0 || !conf.isNarrowRead) || s1_writeback)
@@ -896,10 +896,10 @@ class HellaCache(implicit conf: DCacheConfig) extends Module {
    s2_data(w) := regs.toBits
  }
  val s2_data_muxed = Mux1H(s2_tag_match_way, s2_data)
-  val s2_data_decoded = (0 until conf.wordsperrow).map(i => conf.code.decode(s2_data_muxed(conf.encdatabits*(i+1)-1,conf.encdatabits*i)))
+  val s2_data_decoded = (0 until conf.rowwords).map(i => conf.code.decode(s2_data_muxed(conf.encdatabits*(i+1)-1,conf.encdatabits*i)))
  val s2_data_corrected = AVec(s2_data_decoded.map(_.corrected)).toBits
  val s2_data_uncorrected = AVec(s2_data_decoded.map(_.uncorrected)).toBits
-  val s2_word_idx = if (conf.isNarrowRead) UInt(0) else s2_req.addr(log2Up(conf.wordsperrow*conf.databytes)-1,3)
+  val s2_word_idx = if (conf.isNarrowRead) UInt(0) else s2_req.addr(log2Up(conf.rowwords*conf.databytes)-1,3)
  val s2_data_correctable = AVec(s2_data_decoded.map(_.correctable)).toBits()(s2_word_idx)
  
  // store/amo hits
@@ -912,8 +912,8 @@ class HellaCache(implicit conf: DCacheConfig) extends Module {
  }

  writeArb.io.in(0).bits.addr := s3_req.addr
-  writeArb.io.in(0).bits.wmask := UInt(1) << s3_req.addr(conf.ramoffbits-1,offsetlsb).toUInt
-  writeArb.io.in(0).bits.data := Fill(conf.wordsperrow, s3_req.data)
+  writeArb.io.in(0).bits.wmask := UInt(1) << s3_req.addr(conf.rowoffbits-1,offsetlsb).toUInt
+  writeArb.io.in(0).bits.data := Fill(conf.rowwords, s3_req.data)
  writeArb.io.in(0).valid := s3_valid
  writeArb.io.in(0).bits.way_en :=  s3_way

--- a/rocket/src/main/scala/ptw.scala
+++ b/rocket/src/main/scala/ptw.scala
@@ -1,27 +1,27 @@
 package rocket

 import Chisel._
-import uncore.constants.AddressConstants._
-import uncore.constants.MemoryOpConstants._
+import uncore._
 import Util._

-class PTWResp extends Bundle {
-    val error = Bool()
-    val ppn = UInt(width = PPN_BITS)
-    val perm = Bits(width = PERM_BITS)
+class PTWResp()(implicit conf: AddressSpaceConfiguration) extends Bundle {
+  val error = Bool()
+  val ppn = UInt(width = conf.ppnBits)
+  val perm = Bits(width = conf.permBits)
+
+  override def clone = new PTWResp().asInstanceOf[this.type]
 }

-class TLBPTWIO extends Bundle {
-  val req = Decoupled(UInt(width = VPN_BITS))
+class TLBPTWIO()(implicit conf: AddressSpaceConfiguration) extends Bundle {
+  val req = Decoupled(UInt(width = conf.vpnBits))
  val resp = Valid(new PTWResp).flip
-
  val status = new Status().asInput
  val invalidate = Bool(INPUT)
  val sret = Bool(INPUT)
 }

-class DatapathPTWIO extends Bundle {
-  val ptbr = UInt(INPUT, PADDR_BITS)
+class DatapathPTWIO()(implicit conf: AddressSpaceConfiguration) extends Bundle {
+  val ptbr = UInt(INPUT, conf.paddrBits)
  val invalidate = Bool(INPUT)
  val sret = Bool(INPUT)
  val status = new Status().asInput
@@ -29,6 +29,7 @@ class DatapathPTWIO extends Bundle {

 class PTW(n: Int)(implicit conf: RocketConfiguration) extends Module
 {
+  implicit val as = conf.as
  val io = new Bundle {
    val requestor = Vec.fill(n){new TLBPTWIO}.flip
    val mem = new HellaCacheIO()(conf.dcache)
@@ -36,8 +37,8 @@ class PTW(n: Int)(implicit conf: RocketConfiguration) extends Module
  }
  
  val levels = 3
-  val bitsPerLevel = VPN_BITS/levels
-  require(VPN_BITS == levels * bitsPerLevel)
+  val bitsPerLevel = conf.as.vpnBits/levels
+  require(conf.as.vpnBits == levels * bitsPerLevel)

  val s_ready :: s_req :: s_wait :: s_done :: s_error :: Nil = Enum(UInt(), 5)
  val state = Reg(init=s_ready)
@@ -49,14 +50,14 @@ class PTW(n: Int)(implicit conf: RocketConfiguration) extends Module
  
  val vpn_idx = AVec((0 until levels).map(i => (r_req_vpn >> (levels-i-1)*bitsPerLevel)(bitsPerLevel-1,0)))(count)

-  val arb = Module(new RRArbiter(UInt(width = VPN_BITS), n))
+  val arb = Module(new RRArbiter(UInt(width = conf.as.vpnBits), n))
  arb.io.in <> io.requestor.map(_.req)
  arb.io.out.ready := state === s_ready

  when (arb.io.out.fire()) {
    r_req_vpn := arb.io.out.bits
    r_req_dest := arb.io.chosen
-    r_pte := Cat(io.dpath.ptbr(PADDR_BITS-1,PGIDX_BITS), io.mem.resp.bits.data(PGIDX_BITS-1,0))
+    r_pte := Cat(io.dpath.ptbr(conf.as.paddrBits-1,conf.as.pgIdxBits), io.mem.resp.bits.data(conf.as.pgIdxBits-1,0))
  }

  when (io.mem.resp.valid) {
@@ -67,13 +68,13 @@ class PTW(n: Int)(implicit conf: RocketConfiguration) extends Module
  io.mem.req.bits.phys := Bool(true)
  io.mem.req.bits.cmd  := M_XRD
  io.mem.req.bits.typ  := MT_D
-  io.mem.req.bits.addr := Cat(r_pte(PADDR_BITS-1,PGIDX_BITS), vpn_idx).toUInt << log2Up(conf.xprlen/8)
+  io.mem.req.bits.addr := Cat(r_pte(conf.as.paddrBits-1,conf.as.pgIdxBits), vpn_idx).toUInt << log2Up(conf.xprlen/8)
  io.mem.req.bits.kill := Bool(false)
  
  val resp_val = state === s_done || state === s_error
  val resp_err = state === s_error || state === s_wait

-  val r_resp_ppn = io.mem.req.bits.addr >> PGIDX_BITS
+  val r_resp_ppn = io.mem.req.bits.addr >> conf.as.pgIdxBits
  val resp_ppn = AVec((0 until levels-1).map(i => Cat(r_resp_ppn >> bitsPerLevel*(levels-i-1), r_req_vpn(bitsPerLevel*(levels-i-1)-1,0))) :+ r_resp_ppn)(count)

  for (i <- 0 until io.requestor.size) {
--- a/rocket/src/main/scala/rocc.scala
+++ b/rocket/src/main/scala/rocc.scala
@@ -35,6 +35,7 @@ class RoCCResponse(implicit conf: RocketConfiguration) extends Bundle

 class RoCCInterface(implicit conf: RocketConfiguration) extends Bundle
 {
+  implicit val as = conf.as
  val cmd = Decoupled(new RoCCCommand).flip
  val resp = Decoupled(new RoCCResponse)
  val mem = new HellaCacheIO()(conf.dcache)
--- a/rocket/src/main/scala/tile.scala
+++ b/rocket/src/main/scala/tile.scala
@@ -4,7 +4,7 @@ import Chisel._
 import uncore._
 import Util._

-case class RocketConfiguration(tl: TileLinkConfiguration,
+case class RocketConfiguration(tl: TileLinkConfiguration, as: AddressSpaceConfiguration,
                               icache: ICacheConfig, dcache: DCacheConfig,
                               fpu: Option[FPUConfig] = None,
                               rocc: Option[RocketConfiguration => RoCC] = None,
--- a/rocket/src/main/scala/tlb.scala
+++ b/rocket/src/main/scala/tlb.scala
@@ -1,7 +1,7 @@
 package rocket

 import Chisel._
-import uncore.constants.AddressConstants._
+import uncore.AddressSpaceConfiguration
 import scala.math._

 class CAMIO(entries: Int, addr_bits: Int, tag_bits: Int) extends Bundle {
@@ -64,28 +64,30 @@ class PseudoLRU(n: Int)
  }
 }

-class TLBReq extends Bundle
+class TLBReq()(implicit conf: AddressSpaceConfiguration) extends Bundle
 {
-  val asid = UInt(width = ASID_BITS)
-  val vpn = UInt(width = VPN_BITS+1)
+  val asid = UInt(width = conf.asidBits)
+  val vpn = UInt(width = conf.vpnBits+1)
  val passthrough = Bool()
  val instruction = Bool()
+
+  override def clone = new TLBReq().asInstanceOf[this.type]
 }

-class TLBResp(entries: Int) extends Bundle
+class TLBResp(entries: Int)(implicit conf: AddressSpaceConfiguration) extends Bundle
 {
  // lookup responses
  val miss = Bool(OUTPUT)
  val hit_idx = UInt(OUTPUT, entries)
-  val ppn = UInt(OUTPUT, PPN_BITS)
+  val ppn = UInt(OUTPUT, conf.ppnBits)
  val xcpt_ld = Bool(OUTPUT)
  val xcpt_st = Bool(OUTPUT)
  val xcpt_if = Bool(OUTPUT)

-  override def clone = new TLBResp(entries).asInstanceOf[this.type]
+  override def clone = new TLBResp(entries)(conf).asInstanceOf[this.type]
 }

-class TLB(entries: Int) extends Module
+class TLB(entries: Int)(implicit conf: AddressSpaceConfiguration) extends Module
 {
  val io = new Bundle {
    val req = Decoupled(new TLBReq).flip
@@ -98,7 +100,7 @@ class TLB(entries: Int) extends Module
  val r_refill_tag = Reg(UInt())
  val r_refill_waddr = Reg(UInt())

-  val tag_cam = Module(new RocketCAM(entries, ASID_BITS+VPN_BITS))
+  val tag_cam = Module(new RocketCAM(entries, conf.asidBits+conf.vpnBits))
  val tag_ram = Vec.fill(entries){Reg(io.ptw.resp.bits.ppn.clone)}
  
  val lookup_tag = Cat(io.req.bits.asid, io.req.bits.vpn).toUInt
@@ -135,7 +137,7 @@ class TLB(entries: Int) extends Module
  val plru = new PseudoLRU(entries)
  val repl_waddr = Mux(has_invalid_entry, invalid_entry, plru.replace)
  
-  val bad_va = io.req.bits.vpn(VPN_BITS) != io.req.bits.vpn(VPN_BITS-1)
+  val bad_va = io.req.bits.vpn(conf.vpnBits) != io.req.bits.vpn(conf.vpnBits-1)
  val tlb_hit  = io.ptw.status.vm && tag_hit
  val tlb_miss = io.ptw.status.vm && !tag_hit && !bad_va
  
@@ -148,7 +150,7 @@ class TLB(entries: Int) extends Module
  io.resp.xcpt_st := bad_va || tlb_hit && !Mux(io.ptw.status.s, (sw_array & tag_cam.io.hits).orR, (uw_array & tag_cam.io.hits).orR)
  io.resp.xcpt_if := bad_va || tlb_hit && !Mux(io.ptw.status.s, (sx_array & tag_cam.io.hits).orR, (ux_array & tag_cam.io.hits).orR)
  io.resp.miss := tlb_miss
-  io.resp.ppn := Mux(io.ptw.status.vm && !io.req.bits.passthrough, Mux1H(tag_cam.io.hits, tag_ram), io.req.bits.vpn(PPN_BITS-1,0))
+  io.resp.ppn := Mux(io.ptw.status.vm && !io.req.bits.passthrough, Mux1H(tag_cam.io.hits, tag_ram), io.req.bits.vpn(conf.ppnBits-1,0))
  io.resp.hit_idx := tag_cam.io.hits
  
  io.ptw.req.valid := state === s_request