RSNew: enable tlb with identical page table

src/main/scala/xiangshan/backend/fu/CSR.scala

@@ -336,8 +336,8 @@ class CSR extends FunctionUnit(csrCfg) with HasCSRConst{
   // val sie = RegInit(0.U(XLEN.W))
   val sieMask = "h222".U & mideleg
   val sipMask  = "h222".U & mideleg
-  val satp = RegInit(0.U(XLEN.W))
-  // val satp = RegInit(UInt(XLEN.W), "h8000000000087fbe".U) // only use for tlb naive debug
+  // val satp = RegInit(0.U(XLEN.W)) // NOTE: choose me when boot system or non-tlb test
+  val satp = RegInit(UInt(XLEN.W), "h8000000000087fbe".U) // only use for tlb naive debug
   val satpMask = "h80000fffffffffff".U // disable asid, mode can only be 8 / 0 
   // val satp = RegInit(UInt(XLEN.W), 0.U)
   val sepc = RegInit(UInt(XLEN.W), 0.U)

src/main/scala/xiangshan/cache/dtlb.scala

@@ -194,8 +194,8 @@ class TLB(Width: Int, isDtlb: Boolean) extends TlbModule with HasCSRConst{
   val priv   = csr.priv
   val ifecth = if (isDtlb) false.B else true.B
   val mode   = if (isDtlb) priv.dmode else priv.imode
-  // val vmEnable = satp.mode === 8.U // && (mode < ModeM) // FIXME: fix me when boot xv6/linux...
-  val vmEnable = satp.mode === 8.U && (mode < ModeM)
+  val vmEnable = satp.mode === 8.U // && (mode < ModeM) // NOTE: choose next line when boot xv6/linux...
+  // val vmEnable = satp.mode === 8.U && (mode < ModeM)
   BoringUtils.addSink(sfence, "SfenceBundle")
   BoringUtils.addSink(csr, "TLBCSRIO")