xref: /XiangShan/src/main/scala/system/SoC.scala (revision 303b861d75e423c4e4e22502cc5e73de3f6e08ab) 
1package system
2
3import noop.{NOOP, NOOPConfig}
4import bus.axi4.{AXI4, AXI4Lite}
5import bus.simplebus._
6
7import chisel3._
8import chisel3.util.experimental.BoringUtils
9
10trait HasILAParameter {
11  val enableILA = false
12}
13
14class ILABundle extends Bundle {
15  val WBUpc = UInt(32.W)
16  val WBUvalid = UInt(1.W)
17  val WBUrfWen = UInt(1.W)
18  val WBUrfDest = UInt(5.W)
19  val WBUrfData = UInt(64.W)
20  val InstrCnt = UInt(64.W)
21}
22
23class NOOPSoC(implicit val p: NOOPConfig) extends Module with HasILAParameter {
24  val io = IO(new Bundle{
25    val mem = new AXI4
26    val mmio = (if (p.FPGAPlatform) { new AXI4Lite } else { new SimpleBusUC })
27    val mtip = Input(Bool())
28    val meip = Input(Bool())
29    val ila = if (p.FPGAPlatform && enableILA) Some(Output(new ILABundle)) else None
30  })
31
32  val noop = Module(new NOOP)
33  val cohMg = Module(new CoherenceManager)
34  val xbar = Module(new SimpleBusCrossbarNto1(2))
35  cohMg.io.in <> noop.io.imem.mem
36  noop.io.dmem.coh <> cohMg.io.out.coh
37  xbar.io.in(0) <> cohMg.io.out.mem
38  xbar.io.in(1) <> noop.io.dmem.mem
39  io.mem <> xbar.io.out.toAXI4()
40
41  noop.io.imem.coh.resp.ready := true.B
42  noop.io.imem.coh.req.valid := false.B
43  noop.io.imem.coh.req.bits := DontCare
44
45  if (p.FPGAPlatform) io.mmio <> noop.io.mmio.toAXI4Lite()
46  else io.mmio <> noop.io.mmio
47
48  val mtipSync = RegNext(RegNext(io.mtip))
49  val meipSync = RegNext(RegNext(io.meip))
50  BoringUtils.addSource(mtipSync, "mtip")
51  BoringUtils.addSource(meipSync, "meip")
52
53  // ILA
54  if (p.FPGAPlatform) {
55    def BoringUtilsConnect(sink: UInt, id: String) {
56      val temp = WireInit(0.U(64.W))
57      BoringUtils.addSink(temp, id)
58      sink := temp
59    }
60
61    val dummy = WireInit(0.U.asTypeOf(new ILABundle))
62    val ila = io.ila.getOrElse(dummy)
63    BoringUtilsConnect(ila.WBUpc      ,"ilaWBUpc")
64    BoringUtilsConnect(ila.WBUvalid   ,"ilaWBUvalid")
65    BoringUtilsConnect(ila.WBUrfWen   ,"ilaWBUrfWen")
66    BoringUtilsConnect(ila.WBUrfDest  ,"ilaWBUrfDest")
67    BoringUtilsConnect(ila.WBUrfData  ,"ilaWBUrfData")
68    BoringUtilsConnect(ila.InstrCnt   ,"ilaInstrCnt")
69  }
70}
71