xref: /XiangShan/src/main/scala/xiangshan/L2Top.scala (revision 38d0d7c5a34a23dfdb58a3cb2737c3cfddb3ec9d) 
1/***************************************************************************************
2  * Copyright (c) 2020-2021 Institute of Computing Technology, Chinese Academy of Sciences
3  * Copyright (c) 2020-2021 Peng Cheng Laboratory
4  *
5  * XiangShan is licensed under Mulan PSL v2.
6  * You can use this software according to the terms and conditions of the Mulan PSL v2.
7  * You may obtain a copy of Mulan PSL v2 at:
8  *          http://license.coscl.org.cn/MulanPSL2
9  *
10  * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
11  * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
12  * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
13  *
14  * See the Mulan PSL v2 for more details.
15  ***************************************************************************************/
16
17package xiangshan
18
19import chisel3._
20import chisel3.util._
21import org.chipsalliance.cde.config._
22import chisel3.util.{Valid, ValidIO}
23import freechips.rocketchip.diplomacy._
24import freechips.rocketchip.interrupts._
25import freechips.rocketchip.tile.{BusErrorUnit, BusErrorUnitParams, BusErrors, MaxHartIdBits}
26import freechips.rocketchip.tilelink._
27import coupledL2.{L2ParamKey, EnableCHI}
28import coupledL2.tl2tl.TL2TLCoupledL2
29import coupledL2.tl2chi.{TL2CHICoupledL2, PortIO, CHIIssue}
30import huancun.BankBitsKey
31import system.HasSoCParameter
32import top.BusPerfMonitor
33import utility._
34import xiangshan.cache.mmu.TlbRequestIO
35import xiangshan.backend.fu.PMPRespBundle
36import xiangshan.backend.trace.{Itype, TraceCoreInterface}
37
38class L1BusErrorUnitInfo(implicit val p: Parameters) extends Bundle with HasSoCParameter {
39  val ecc_error = Valid(UInt(soc.PAddrBits.W))
40}
41
42class XSL1BusErrors()(implicit val p: Parameters) extends BusErrors {
43  val icache = new L1BusErrorUnitInfo
44  val dcache = new L1BusErrorUnitInfo
45  val l2 = new L1BusErrorUnitInfo
46
47  override def toErrorList: List[Option[(ValidIO[UInt], String, String)]] =
48    List(
49      Some(icache.ecc_error, "I_ECC", "Icache ecc error"),
50      Some(dcache.ecc_error, "D_ECC", "Dcache ecc error"),
51      Some(l2.ecc_error, "L2_ECC", "L2Cache ecc error")
52    )
53}
54
55/**
56  *   L2Top contains everything between Core and XSTile-IO
57  */
58class L2TopInlined()(implicit p: Parameters) extends LazyModule
59  with HasXSParameter
60  with HasSoCParameter
61{
62  override def shouldBeInlined: Boolean = true
63
64  def chainBuffer(depth: Int, n: String): (Seq[LazyModule], TLNode) = {
65    val buffers = Seq.fill(depth){ LazyModule(new TLBuffer()) }
66    buffers.zipWithIndex.foreach{ case (b, i) => {
67      b.suggestName(s"${n}_${i}")
68    }}
69    val node = buffers.map(_.node.asInstanceOf[TLNode]).reduce(_ :*=* _)
70    (buffers, node)
71  }
72  val enableL2 = coreParams.L2CacheParamsOpt.isDefined
73  // =========== Components ============
74  val l1_xbar = TLXbar()
75  val mmio_xbar = TLXbar()
76  val mmio_port = TLIdentityNode() // to L3
77  val memory_port = if (enableCHI && enableL2) None else Some(TLIdentityNode())
78  val beu = LazyModule(new BusErrorUnit(
79    new XSL1BusErrors(),
80    BusErrorUnitParams(soc.BEURange.base, soc.BEURange.mask.toInt + 1)
81  ))
82
83  val i_mmio_port = TLTempNode()
84  val d_mmio_port = TLTempNode()
85
86  val misc_l2_pmu = BusPerfMonitor(name = "Misc_L2", enable = !debugOpts.FPGAPlatform) // l1D & l1I & PTW
87  val l2_l3_pmu = BusPerfMonitor(name = "L2_L3", enable = !debugOpts.FPGAPlatform && !enableCHI, stat_latency = true)
88  val xbar_l2_buffer = TLBuffer()
89
90  val enbale_tllog = !debugOpts.FPGAPlatform && debugOpts.AlwaysBasicDB
91  val l1d_logger = TLLogger(s"L2_L1D_${coreParams.HartId}", enbale_tllog)
92  val l1i_logger = TLLogger(s"L2_L1I_${coreParams.HartId}", enbale_tllog)
93  val ptw_logger = TLLogger(s"L2_PTW_${coreParams.HartId}", enbale_tllog)
94  val ptw_to_l2_buffer = LazyModule(new TLBuffer)
95  val i_mmio_buffer = LazyModule(new TLBuffer)
96
97  val clint_int_node = IntIdentityNode()
98  val debug_int_node = IntIdentityNode()
99  val plic_int_node = IntIdentityNode()
100  val nmi_int_node = IntIdentityNode()
101
102  println(s"enableCHI: ${enableCHI}")
103  val l2cache = if (enableL2) {
104    val config = new Config((_, _, _) => {
105      case L2ParamKey => coreParams.L2CacheParamsOpt.get.copy(
106        hartId = p(XSCoreParamsKey).HartId,
107        FPGAPlatform = debugOpts.FPGAPlatform
108      )
109      case EnableCHI => p(EnableCHI)
110      case CHIIssue => p(CHIIssue)
111      case BankBitsKey => log2Ceil(coreParams.L2NBanks)
112      case MaxHartIdBits => p(MaxHartIdBits)
113      case LogUtilsOptionsKey => p(LogUtilsOptionsKey)
114      case PerfCounterOptionsKey => p(PerfCounterOptionsKey)
115    })
116    if (enableCHI) Some(LazyModule(new TL2CHICoupledL2()(new Config(config))))
117    else Some(LazyModule(new TL2TLCoupledL2()(new Config(config))))
118  } else None
119  val l2_binder = coreParams.L2CacheParamsOpt.map(_ => BankBinder(coreParams.L2NBanks, 64))
120
121  // =========== Connection ============
122  // l2 to l2_binder, then to memory_port
123  l2cache match {
124    case Some(l2) =>
125      l2_binder.get :*= l2.node :*= xbar_l2_buffer :*= l1_xbar :=* misc_l2_pmu
126      l2 match {
127        case l2: TL2TLCoupledL2 =>
128          memory_port.get := l2_l3_pmu := TLClientsMerger() := TLXbar() :=* l2_binder.get
129        case l2: TL2CHICoupledL2 =>
130          l2.managerNode := TLXbar() :=* l2_binder.get
131          l2.mmioNode := mmio_port
132      }
133    case None =>
134      memory_port.get := l1_xbar
135  }
136
137  mmio_xbar := TLBuffer.chainNode(2) := i_mmio_port
138  mmio_xbar := TLBuffer.chainNode(2) := d_mmio_port
139  beu.node := TLBuffer.chainNode(1) := mmio_xbar
140  mmio_port := TLBuffer() := mmio_xbar
141
142  class Imp(wrapper: LazyModule) extends LazyModuleImp(wrapper) {
143    val io = IO(new Bundle {
144      val beu_errors = Input(chiselTypeOf(beu.module.io.errors))
145      val reset_vector = new Bundle {
146        val fromTile = Input(UInt(PAddrBits.W))
147        val toCore = Output(UInt(PAddrBits.W))
148      }
149      val hartId = new Bundle() {
150        val fromTile = Input(UInt(64.W))
151        val toCore = Output(UInt(64.W))
152      }
153      val cpu_halt = new Bundle() {
154        val fromCore = Input(Bool())
155        val toTile = Output(Bool())
156      }
157      val cpu_critical_error = new Bundle() {
158        val fromCore = Input(Bool())
159        val toTile = Output(Bool())
160      }
161      val hartIsInReset = new Bundle() {
162        val resetInFrontend = Input(Bool())
163        val toTile = Output(Bool())
164      }
165      val traceCoreInterface = new Bundle{
166        val fromCore = Flipped(new TraceCoreInterface)
167        val toTile   = new TraceCoreInterface
168      }
169      val debugTopDown = new Bundle() {
170        val robTrueCommit = Input(UInt(64.W))
171        val robHeadPaddr = Flipped(Valid(UInt(36.W)))
172        val l2MissMatch = Output(Bool())
173      }
174      val chi = if (enableCHI) Some(new PortIO) else None
175      val nodeID = if (enableCHI) Some(Input(UInt(NodeIDWidth.W))) else None
176      val l2_tlb_req = new TlbRequestIO(nRespDups = 2)
177      val l2_pmp_resp = Flipped(new PMPRespBundle)
178      val l2_hint = ValidIO(new L2ToL1Hint())
179      val perfEvents = Output(Vec(numPCntHc * coreParams.L2NBanks + 1, new PerfEvent))
180      // val reset_core = IO(Output(Reset()))
181    })
182
183    val resetDelayN = Module(new DelayN(UInt(PAddrBits.W), 5))
184
185    beu.module.io.errors.icache := io.beu_errors.icache
186    beu.module.io.errors.dcache := io.beu_errors.dcache
187    resetDelayN.io.in := io.reset_vector.fromTile
188    io.reset_vector.toCore := resetDelayN.io.out
189    io.hartId.toCore := io.hartId.fromTile
190    io.cpu_halt.toTile := io.cpu_halt.fromCore
191    io.cpu_critical_error.toTile := io.cpu_critical_error.fromCore
192    // trace interface
193    val traceToTile = io.traceCoreInterface.toTile
194    val traceFromCore = io.traceCoreInterface.fromCore
195    traceFromCore.fromEncoder := RegNext(traceToTile.fromEncoder)
196    traceToTile.toEncoder.trap := RegEnable(
197      traceFromCore.toEncoder.trap,
198      traceFromCore.toEncoder.groups(0).valid && Itype.isTrap(traceFromCore.toEncoder.groups(0).bits.itype)
199    )
200    traceToTile.toEncoder.priv := RegEnable(
201      traceFromCore.toEncoder.priv,
202      traceFromCore.toEncoder.groups(0).valid
203    )
204    (0 until TraceGroupNum).foreach{ i =>
205      traceToTile.toEncoder.groups(i).valid := RegNext(traceFromCore.toEncoder.groups(i).valid)
206      traceToTile.toEncoder.groups(i).bits.iretire := RegNext(traceFromCore.toEncoder.groups(i).bits.iretire)
207      traceToTile.toEncoder.groups(i).bits.itype := RegNext(traceFromCore.toEncoder.groups(i).bits.itype)
208      traceToTile.toEncoder.groups(i).bits.ilastsize := RegEnable(
209        traceFromCore.toEncoder.groups(i).bits.ilastsize,
210        traceFromCore.toEncoder.groups(i).valid
211      )
212      traceToTile.toEncoder.groups(i).bits.iaddr := RegEnable(
213        traceFromCore.toEncoder.groups(i).bits.iaddr,
214        traceFromCore.toEncoder.groups(i).valid
215      )
216    }
217
218    dontTouch(io.hartId)
219    dontTouch(io.cpu_halt)
220    dontTouch(io.cpu_critical_error)
221    if (!io.chi.isEmpty) { dontTouch(io.chi.get) }
222
223    val hartIsInReset = RegInit(true.B)
224    hartIsInReset := io.hartIsInReset.resetInFrontend || reset.asBool
225    io.hartIsInReset.toTile := hartIsInReset
226
227    if (l2cache.isDefined) {
228      val l2 = l2cache.get.module
229      io.l2_hint := l2.io.l2_hint
230      l2.io.debugTopDown.robHeadPaddr := DontCare
231      l2.io.hartId := io.hartId.fromTile
232      l2.io.debugTopDown.robHeadPaddr := io.debugTopDown.robHeadPaddr
233      l2.io.debugTopDown.robTrueCommit := io.debugTopDown.robTrueCommit
234      io.debugTopDown.l2MissMatch := l2.io.debugTopDown.l2MissMatch
235
236      /* l2 tlb */
237      io.l2_tlb_req.req.bits := DontCare
238      io.l2_tlb_req.req.valid := l2.io.l2_tlb_req.req.valid
239      io.l2_tlb_req.resp.ready := l2.io.l2_tlb_req.resp.ready
240      io.l2_tlb_req.req.bits.vaddr := l2.io.l2_tlb_req.req.bits.vaddr
241      io.l2_tlb_req.req.bits.cmd := l2.io.l2_tlb_req.req.bits.cmd
242      io.l2_tlb_req.req.bits.size := l2.io.l2_tlb_req.req.bits.size
243      io.l2_tlb_req.req.bits.kill := l2.io.l2_tlb_req.req.bits.kill
244      io.l2_tlb_req.req.bits.no_translate := l2.io.l2_tlb_req.req.bits.no_translate
245      io.l2_tlb_req.req_kill := l2.io.l2_tlb_req.req_kill
246      io.perfEvents := l2.io_perf
247
248      val allPerfEvents = l2.getPerfEvents
249      if (printEventCoding) {
250        for (((name, inc), i) <- allPerfEvents.zipWithIndex) {
251          println("L2 Cache perfEvents Set", name, inc, i)
252        }
253      }
254
255      l2.io.l2_tlb_req.resp.valid := io.l2_tlb_req.resp.valid
256      l2.io.l2_tlb_req.req.ready := io.l2_tlb_req.req.ready
257      l2.io.l2_tlb_req.resp.bits.paddr.head := io.l2_tlb_req.resp.bits.paddr.head
258      l2.io.l2_tlb_req.resp.bits.pbmt := io.l2_tlb_req.resp.bits.pbmt.head
259      l2.io.l2_tlb_req.resp.bits.miss := io.l2_tlb_req.resp.bits.miss
260      l2.io.l2_tlb_req.resp.bits.excp.head.gpf := io.l2_tlb_req.resp.bits.excp.head.gpf
261      l2.io.l2_tlb_req.resp.bits.excp.head.pf := io.l2_tlb_req.resp.bits.excp.head.pf
262      l2.io.l2_tlb_req.resp.bits.excp.head.af := io.l2_tlb_req.resp.bits.excp.head.af
263      l2.io.l2_tlb_req.pmp_resp.ld := io.l2_pmp_resp.ld
264      l2.io.l2_tlb_req.pmp_resp.st := io.l2_pmp_resp.st
265      l2.io.l2_tlb_req.pmp_resp.instr := io.l2_pmp_resp.instr
266      l2.io.l2_tlb_req.pmp_resp.mmio := io.l2_pmp_resp.mmio
267      l2.io.l2_tlb_req.pmp_resp.atomic := io.l2_pmp_resp.atomic
268      l2cache.get match {
269        case l2cache: TL2CHICoupledL2 =>
270          val l2 = l2cache.module
271          l2.io_nodeID := io.nodeID.get
272          io.chi.get <> l2.io_chi
273        case l2cache: TL2TLCoupledL2 =>
274      }
275
276      beu.module.io.errors.l2.ecc_error.valid := l2.io.error.valid
277      beu.module.io.errors.l2.ecc_error.bits := l2.io.error.address
278    } else {
279      io.l2_hint := 0.U.asTypeOf(io.l2_hint)
280      io.debugTopDown <> DontCare
281
282      io.l2_tlb_req.req.valid := false.B
283      io.l2_tlb_req.req.bits := DontCare
284      io.l2_tlb_req.req_kill := DontCare
285      io.l2_tlb_req.resp.ready := true.B
286      io.perfEvents := DontCare
287
288      beu.module.io.errors.l2 := 0.U.asTypeOf(beu.module.io.errors.l2)
289    }
290  }
291
292  lazy val module = new Imp(this)
293}
294
295class L2Top()(implicit p: Parameters) extends LazyModule
296  with HasXSParameter
297  with HasSoCParameter {
298
299  override def shouldBeInlined: Boolean = false
300
301  val inner = LazyModule(new L2TopInlined())
302
303  class Imp(wrapper: LazyModule) extends LazyModuleImp(wrapper) {
304    val io = IO(inner.module.io.cloneType)
305    val reset_core = IO(Output(Reset()))
306    io <> inner.module.io
307
308    if (debugOpts.ResetGen) {
309      ResetGen(ResetGenNode(Seq(
310        CellNode(reset_core),
311        ModuleNode(inner.module)
312      )), reset, sim = false)
313    } else {
314      reset_core := DontCare
315    }
316  }
317
318  lazy val module = new Imp(this)
319}