修改util

chisel/playground/src/defines/Util.scala

@@ -3,13 +3,13 @@ package cpu.defines
 import chisel3._
 import chisel3.util._
 
-object Util {
+object SubwordModify {
-  def subwordModify(source: UInt, start: Int, md: UInt): UInt = {
+  def apply(source: UInt, start: Int, md: UInt): UInt = {
     val ms = md.getWidth
-    subwordModify(source, (start, start - ms + 1), md)
+    apply(source, (start, start - ms + 1), md)
   }
 
-  def subwordModify(source: UInt, tuple: (Int, Int), md: UInt): UInt = {
+  def apply(source: UInt, tuple: (Int, Int), md: UInt): UInt = {
     val ws    = source.getWidth
     val ms    = md.getWidth
     val start = tuple._1
@@ -23,34 +23,22 @@ object Util {
     else if (start == ws - 1) Cat(md, source(end - 1, 0))
     else Cat(source(ws - 1, start + 1), md, source(end - 1, 0))
   }
-
-  def listHasElement(list: Seq[UInt], element: UInt): Bool = {
-    list.foldLeft(false.B)((r, e) => r || (e === element))
 }
 
-  def MAXnBIT(m: Int): BigInt = BigInt(1) << m
+object SignedExtend {
-
+  def apply(a: UInt, len: Int) = {
-  def unsignedToSigned(s: BigInt, width: Int = 32): BigInt = {
-    val m = MAXnBIT(width - 1)
-    if (s >= m) s - 2 * m
-    else s
-  }
-
-  def signedExtend(a: UInt, len: Int) = {
     val aLen    = a.getWidth
     val signBit = a(aLen - 1)
     if (aLen >= len) a(len - 1, 0) else Cat(Fill(len - aLen, signBit), a)
   }
-
-  def zeroExtend(raw: UInt, to: Int = 32): UInt = {
-    zeroExtend(raw, raw.getWidth, to)
 }
 
-  def zeroExtend(raw: UInt, from: Int, to: Int): UInt = {
+object ZeroExtend {
-    require(to > from && from >= 1)
+  def apply(a: UInt, len: Int) = {
-    Cat(Fill(to - from, 0.U), raw)
+    val aLen = a.getWidth
+    if (aLen >= len) a(len - 1, 0) else Cat(0.U((len - aLen).W), a)
+  }
 }
-
 object LookupTree {
   def apply[T <: Data](key: UInt, mapping: Iterable[(UInt, T)]): T =
     Mux1H(mapping.map(p => (p._1 === key, p._2)))
@@ -61,4 +49,81 @@ object Util {
     MuxLookup(key, default)(mapping.toSeq)
 }
 
+object MaskData {
+  def apply(oldData: UInt, newData: UInt, fullmask: UInt) = {
+    require(oldData.getWidth == newData.getWidth)
+    require(oldData.getWidth == fullmask.getWidth)
+    (newData & fullmask) | (oldData & ~fullmask)
+  }
+}
+
+object RegMap {
+  def Unwritable = null
+  def apply(addr: Int, reg: UInt, wfn: UInt => UInt = (x => x)) = (addr, (reg, wfn))
+  def generate(
+    mapping: Map[Int, (UInt, UInt => UInt)],
+    raddr:   UInt,
+    rdata:   UInt,
+    waddr:   UInt,
+    wen:     Bool,
+    wdata:   UInt,
+    wmask:   UInt
+  ): Unit = {
+    val chiselMapping = mapping.map { case (a, (r, w)) => (a.U, r, w) }
+    rdata := LookupTree(raddr, chiselMapping.map { case (a, r, w) => (a, r) })
+    chiselMapping.map {
+      case (a, r, w) =>
+        if (w != null) when(wen && waddr === a) { r := w(MaskData(r, wdata, wmask)) }
+    }
+  }
+  def generate(
+    mapping: Map[Int, (UInt, UInt => UInt)],
+    addr:    UInt,
+    rdata:   UInt,
+    wen:     Bool,
+    wdata:   UInt,
+    wmask:   UInt
+  ): Unit = generate(mapping, addr, rdata, addr, wen, wdata, wmask)
+}
+
+object MaskedRegMap extends CoreParameter {
+  def Unwritable = null
+  def NoSideEffect: UInt => UInt = (x => x)
+  def WritableMask   = Fill(XLEN, true.B)
+  def UnwritableMask = 0.U(XLEN.W)
+  def apply(
+    addr:  Int,
+    reg:   UInt,
+    wmask: UInt         = WritableMask,
+    wfn:   UInt => UInt = (x => x),
+    rmask: UInt         = WritableMask
+  ) = (addr, (reg, wmask, wfn, rmask))
+  def generate(
+    mapping: Map[Int, (UInt, UInt, UInt => UInt, UInt)],
+    raddr:   UInt,
+    rdata:   UInt,
+    waddr:   UInt,
+    wen:     Bool,
+    wdata:   UInt
+  ): Unit = {
+    val chiselMapping = mapping.map { case (a, (r, wm, w, rm)) => (a.U, r, wm, w, rm) }
+    rdata := LookupTree(raddr, chiselMapping.map { case (a, r, wm, w, rm) => (a, r & rm) })
+    chiselMapping.map {
+      case (a, r, wm, w, rm) =>
+        if (w != null && wm != UnwritableMask) when(wen && waddr === a) { r := w(MaskData(r, wdata, wm)) }
+    }
+  }
+  def isIllegalAddr(mapping: Map[Int, (UInt, UInt, UInt => UInt, UInt)], addr: UInt): Bool = {
+    val illegalAddr   = Wire(Bool())
+    val chiselMapping = mapping.map { case (a, (r, wm, w, rm)) => (a.U, r, wm, w, rm) }
+    illegalAddr := LookupTreeDefault(addr, true.B, chiselMapping.map { case (a, r, wm, w, rm) => (a, false.B) })
+    illegalAddr
+  }
+  def generate(
+    mapping: Map[Int, (UInt, UInt, UInt => UInt, UInt)],
+    addr:    UInt,
+    rdata:   UInt,
+    wen:     Bool,
+    wdata:   UInt
+  ): Unit = generate(mapping, addr, rdata, addr, wen, wdata)
 }

chisel/playground/src/pipeline/decoder/DecoderUnit.scala

@@ -8,6 +8,7 @@ import cpu.defines.Const._
 import cpu.{BranchPredictorConfig, CpuConfig}
 import cpu.pipeline.execute.DecoderUnitExecuteUnit
 import cpu.pipeline.fetch.BufferUnit
+import cpu.pipeline.execute
 
 class InstFifoDecoderUnit(implicit val config: CpuConfig) extends Bundle {
   val allow_to_go = Output(Vec(config.decoderNum, Bool()))
@@ -24,21 +25,13 @@ class DataForwardToDecoderUnit extends Bundle {
   val mem      = new RegWrite()
 }
 
-class CsrDecoderUnit extends Bundle {
-  val access_allowed    = Bool()
-  val kernel_mode       = Bool()
-  val intterupt_allowed = Bool()
-  val cause_ip          = UInt(8.W)
-  val status_im         = UInt(8.W)
-}
-
 class DecoderUnit(implicit val config: CpuConfig) extends Module with HasExceptionNO {
   val io = IO(new Bundle {
     // 输入
     val instFifo = new InstFifoDecoderUnit()
     val regfile  = Vec(config.decoderNum, new Src12Read())
     val forward  = Input(Vec(config.fuNum, new DataForwardToDecoderUnit()))
-    val csr      = Input(new CsrDecoderUnit())
+    val csr      = Input(new execute.CsrDecoderUnit())
     // 输出
     val fetchUnit = new Bundle {
       val branch = Output(Bool())
@@ -121,12 +114,13 @@ class DecoderUnit(implicit val config: CpuConfig) extends Module with HasExcepti
   io.executeStage.inst0.ex.int.zip(int.asBools).map { case (x, y) => x := y }
   val hasInt = int.orR
 
+  io.executeStage.inst0.valid     := !io.instFifo.info.empty
   io.executeStage.inst0.pc        := pc(0)
   io.executeStage.inst0.inst_info := inst_info(0)
   io.executeStage.inst0.src_info.src1_data := Mux(
     inst_info(0).reg1_ren,
     forwardCtrl.out.inst(0).src1.rdata,
-    Util.signedExtend(pc(0), INST_ADDR_WID)
+    SignedExtend(pc(0), INST_ADDR_WID)
   )
   io.executeStage.inst0.src_info.src2_data := Mux(
     inst_info(0).reg2_ren,
@@ -145,12 +139,13 @@ class DecoderUnit(implicit val config: CpuConfig) extends Module with HasExcepti
   io.executeStage.inst0.jb_info.branch_target    := io.bpu.branch_target
   io.executeStage.inst0.jb_info.update_pht_index := io.bpu.update_pht_index
   if (config.decoderNum == 2) {
+    io.executeStage.inst1.valid     := !io.instFifo.info.almost_empty
     io.executeStage.inst1.pc        := pc(1)
     io.executeStage.inst1.inst_info := inst_info(1)
     io.executeStage.inst1.src_info.src1_data := Mux(
       inst_info(1).reg1_ren,
       forwardCtrl.out.inst(1).src1.rdata,
-      Util.signedExtend(pc(1), INST_ADDR_WID)
+      SignedExtend(pc(1), INST_ADDR_WID)
     )
     io.executeStage.inst1.src_info.src2_data := Mux(
       inst_info(1).reg2_ren,
@@ -161,8 +156,7 @@ class DecoderUnit(implicit val config: CpuConfig) extends Module with HasExcepti
     io.executeStage.inst1.ex.excode(illegalInstr) := !decoder(1).io.out.inst_info.inst_valid &&
     !hasInt && !io.instFifo.info.almost_empty
     io.executeStage.inst1.ex.excode(instrAccessFault) := io.instFifo.inst(1).acc_err
-  }
+  } else {
-  else {
     io.executeStage.inst1 := DontCare
   }
 }

chisel/playground/src/pipeline/memory/DataMemoryAccess.scala

@@ -44,7 +44,7 @@ class DataMemoryAccess(implicit val config: CpuConfig) extends Module {
     (io.memoryUnit.in.mem_sel(0) && !io.memoryUnit.in.ex(0).flush_req ||
       io.memoryUnit.in.mem_sel(1) && !io.memoryUnit.in.ex(0).flush_req && !io.memoryUnit.in.ex(1).flush_req)
   io.dataMemory.out.addr := mem_addr
-  val rdata = Util.LookupTree(
+  val rdata = LookupTree(
     mem_addr(2, 0),
     List(
       "b000".U -> mem_rdata(63, 0),
@@ -57,19 +57,19 @@ class DataMemoryAccess(implicit val config: CpuConfig) extends Module {
       "b111".U -> mem_rdata(63, 56)
     )
   )
-  io.memoryUnit.out.rdata := Util.LookupTree(
+  io.memoryUnit.out.rdata := LookupTree(
     op,
     List(
-      LSUOpType.lb  -> Util.signedExtend(rdata(7, 0), XLEN),
+      LSUOpType.lb  -> SignedExtend(rdata(7, 0), XLEN),
-      LSUOpType.lh  -> Util.signedExtend(rdata(15, 0), XLEN),
+      LSUOpType.lh  -> SignedExtend(rdata(15, 0), XLEN),
-      LSUOpType.lw  -> Util.signedExtend(rdata(31, 0), XLEN),
+      LSUOpType.lw  -> SignedExtend(rdata(31, 0), XLEN),
-      LSUOpType.lbu -> Util.zeroExtend(rdata(7, 0), XLEN),
+      LSUOpType.lbu -> ZeroExtend(rdata(7, 0), XLEN),
-      LSUOpType.lhu -> Util.zeroExtend(rdata(15, 0), XLEN),
+      LSUOpType.lhu -> ZeroExtend(rdata(15, 0), XLEN),
-      LSUOpType.lwu -> Util.zeroExtend(rdata(31, 0), XLEN)
+      LSUOpType.lwu -> ZeroExtend(rdata(31, 0), XLEN)
     )
   )
   def genWdata(data: UInt, sizeEncode: UInt): UInt = {
-    Util.LookupTree(
+    LookupTree(
       sizeEncode,
       List(
         "b00".U -> Fill(8, data(7, 0)),
@@ -81,7 +81,7 @@ class DataMemoryAccess(implicit val config: CpuConfig) extends Module {
   }
   io.dataMemory.out.wdata := genWdata(mem_wdata, op(1, 0))
   def genWmask(addr: UInt, sizeEncode: UInt): UInt = {
-    Util.LookupTree(
+    LookupTree(
       sizeEncode,
       List(
         "b00".U -> 0x1.U, //0001 << addr(2:0)