Add unpipelined Wishbone support for uncached version

src/main/scala/vexriscv/demo/VexRiscvCachedWishboneForSim.scala

@@ -24,16 +24,16 @@ object VexRiscvCachedWishboneForSim{
       //CPU configuration
       val cpuConfig = VexRiscvConfig(
         plugins = List(
-          new PcManagerSimplePlugin(0x00000000l, false),
 //          new IBusSimplePlugin(
-//            interfaceKeepData = false,
+//            resetVector = 0x80000000l,
-//            catchAccessFault = false
+//            prediction = STATIC
 //          ),
 //          new DBusSimplePlugin(
 //            catchAddressMisaligned = false,
 //            catchAccessFault = false
 //          ),
           new IBusCachedPlugin(
+            resetVector = 0x80000000l,
             prediction = STATIC,
             config = InstructionCacheConfig(
               cacheSize = 4096,
@@ -79,7 +79,7 @@ object VexRiscvCachedWishboneForSim{
           ),
           new RegFilePlugin(
             regFileReadyKind = plugin.SYNC,
-            zeroBoot = false
+            zeroBoot = true
           ),
           new IntAluPlugin,
           new SrcPlugin(
@@ -117,36 +117,22 @@ object VexRiscvCachedWishboneForSim{
       //cpu.setDefinitionName("VexRiscvAvalon")
       cpu.rework {
         for (plugin <- cpuConfig.plugins) plugin match {
-//          case plugin: IBusSimplePlugin => {
+          case plugin: IBusSimplePlugin => {
-//            plugin.iBus.asDirectionLess() //Unset IO properties of iBus
-//            iBus = master(plugin.iBus.toAvalon())
-//              .setName("iBusAvalon")
-//              .addTag(ClockDomainTag(ClockDomain.current)) //Specify a clock domain to the iBus (used by QSysify)
-//          }
-          case plugin: IBusCachedPlugin => {
             plugin.iBus.asDirectionLess() //Unset IO properties of iBus
             master(plugin.iBus.toWishbone()).setName("iBusWishbone")
           }
-//          case plugin: DBusSimplePlugin => {
+          case plugin: IBusCachedPlugin => {
-//            plugin.dBus.asDirectionLess()
+            plugin.iBus.asDirectionLess()
-//            master(plugin.dBus.toAvalon())
+            master(plugin.iBus.toWishbone()).setName("iBusWishbone")
-//              .setName("dBusAvalon")
+          }
-//              .addTag(ClockDomainTag(ClockDomain.current))
+          case plugin: DBusSimplePlugin => {
-//          }
+            plugin.dBus.asDirectionLess()
+            master(plugin.dBus.toWishbone()).setName("dBusWishbone")
+          }
           case plugin: DBusCachedPlugin => {
             plugin.dBus.asDirectionLess()
             master(plugin.dBus.toWishbone()).setName("dBusWishbone")
           }
-//          case plugin: DebugPlugin => {
-//            plugin.io.bus.asDirectionLess()
-//            slave(plugin.io.bus.fromAvalon())
-//              .setName("debugBusAvalon")
-//              .addTag(ClockDomainTag(plugin.debugClockDomain))
-//              .parent = null  //Avoid the io bundle to be interpreted as a QSys conduit
-//            plugin.io.resetOut
-//              .addTag(ResetEmitterTag(plugin.debugClockDomain))
-//              .parent = null //Avoid the io bundle to be interpreted as a QSys conduit
-//          }
           case _ =>
         }
       }

src/main/scala/vexriscv/plugin/DBusSimplePlugin.scala

@@ -4,7 +4,9 @@ import vexriscv._
 import spinal.core._
 import spinal.lib._
 import spinal.lib.bus.amba4.axi._
-import spinal.lib.bus.avalon.{AvalonMMConfig, AvalonMM}
+import spinal.lib.bus.avalon.{AvalonMM, AvalonMMConfig}
+import spinal.lib.bus.wishbone.{Wishbone, WishboneConfig}
+import vexriscv.ip.DataCacheMemCmd
 
 
 case class DBusSimpleCmd() extends Bundle{
@@ -45,6 +47,21 @@ object DBusSimpleBus{
     useResponse = true,
     maximumPendingReadTransactions = 1
   )
+
+  def getWishboneConfig() = WishboneConfig(
+    addressWidth = 30,
+    dataWidth = 32,
+    selWidth = 4,
+    useSTALL = false,
+    useLOCK = false,
+    useERR = true,
+    useRTY = false,
+    tgaWidth = 0,
+    tgcWidth = 0,
+    tgdWidth = 0,
+    useBTE = true,
+    useCTI = true
+  )
 }
 
 case class DBusSimpleBus() extends Bundle with IMasterSlave{
@@ -133,6 +150,35 @@ case class DBusSimpleBus() extends Bundle with IMasterSlave{
 
     mm
   }
+
+  def toWishbone(): Wishbone = {
+    val wishboneConfig = DBusSimpleBus.getWishboneConfig()
+    val bus = Wishbone(wishboneConfig)
+    val cmdStage = cmd.halfPipe()
+
+    bus.ADR := cmdStage.address >> 2
+    bus.CTI :=B"000"
+    bus.BTE := "00"
+    bus.SEL := (cmdStage.size.mux (
+      U(0) -> B"0001",
+      U(1) -> B"0011",
+      default -> B"1111"
+    ) << cmdStage.address(1 downto 0)).resized
+    when(!cmdStage.wr) {
+      bus.SEL := "1111"
+    }
+    bus.WE  := cmdStage.wr
+    bus.DAT_MOSI := cmdStage.data
+
+    cmdStage.ready := cmdStage.valid && bus.ACK
+    bus.CYC := cmdStage.valid
+    bus.STB := cmdStage.valid
+
+    rsp.ready := cmdStage.valid && !bus.WE && bus.ACK
+    rsp.data  := bus.DAT_MISO
+    rsp.error := False //TODO
+    bus
+  }
 }
 
 

src/main/scala/vexriscv/plugin/IBusSimplePlugin.scala

@@ -5,6 +5,7 @@ import spinal.core._
 import spinal.lib._
 import spinal.lib.bus.amba4.axi._
 import spinal.lib.bus.avalon.{AvalonMM, AvalonMMConfig}
+import spinal.lib.bus.wishbone.{Wishbone, WishboneConfig}
 
 
 
@@ -43,6 +44,21 @@ object IBusSimpleBus{
     useResponse = true,
     maximumPendingReadTransactions = 8
   )
+
+  def getWishboneConfig() = WishboneConfig(
+    addressWidth = 30,
+    dataWidth = 32,
+    selWidth = 4,
+    useSTALL = false,
+    useLOCK = false,
+    useERR = true,
+    useRTY = false,
+    tgaWidth = 0,
+    tgcWidth = 0,
+    tgdWidth = 0,
+    useBTE = true,
+    useCTI = true
+  )
 }
 
 
@@ -96,6 +112,29 @@ case class IBusSimpleBus(interfaceKeepData : Boolean) extends Bundle with IMaste
 
     mm
   }
+
+  def toWishbone(): Wishbone = {
+    val wishboneConfig = IBusSimpleBus.getWishboneConfig()
+    val bus = Wishbone(wishboneConfig)
+    val cmdPipe = cmd.stage()
+
+    bus.ADR := (cmdPipe.pc >>  2)
+    bus.CTI := B"000"
+    bus.BTE := "00"
+    bus.SEL := "1111"
+    bus.WE  := False
+    bus.DAT_MOSI.assignDontCare()
+    bus.CYC := cmdPipe.valid
+    bus.STB := cmdPipe.valid
+
+
+    cmdPipe.ready := cmdPipe.valid && bus.ACK
+    rsp.valid := bus.CYC && bus.ACK
+    rsp.inst := bus.DAT_MISO
+    rsp.error := False //TODO
+    bus
+  }
+
 }
 
 

src/test/cpp/regression/main.cpp

@@ -624,6 +624,8 @@ public:
     		bool error;
     	};
 
+        uint32_t periphWriteTimer = 0;
+    	queue<MemWrite> periphWritesGolden;
     	queue<MemWrite> periphWrites;
     	queue<MemRead> periphRead;
     	Workspace *ws;
@@ -663,11 +665,11 @@ public:
         }
         virtual void dWrite(int32_t address, int32_t size, uint32_t data){
     		if((address & 0xF0000000) == 0xF0000000){
-				MemWrite t = periphWrites.front();
+				MemWrite w;
-				if(t.address != address || t.size != size || t.data != data){
+				w.address = address;
-					fail();
+				w.size = size;
-				}
+				w.data = data;
-				periphWrites.pop();
+				periphWritesGolden.push(w);
     		}else {
     			mem.write(address, size, (uint8_t*)&data);
     		}
@@ -677,6 +679,23 @@ public:
         void step() {
         	rfWriteValid = false;
         	RiscvGolden::step();
+
+        	switch(periphWrites.empty() + uint32_t(periphWritesGolden.empty())*2){
+        	case 3: periphWriteTimer = 0; break;
+        	case 1: case 2: if(periphWriteTimer++ == 20){ cout << "periphWrite timout" << endl; fail();} break;
+        	case 0:
+    			MemWrite t = periphWrites.front();
+    			MemWrite t2 = periphWritesGolden.front();
+    			if(t.address != t2.address || t.size != t2.size || t.data != t2.data){
+    				cout << "periphWrite missmatch" << endl;
+    				fail();
+    			}
+    			periphWrites.pop();
+    			periphWritesGolden.pop();
+    			break;
+        	}
+
+
         }
     };
 
@@ -903,7 +922,7 @@ public:
 		if(bootPc != -1) top->VexRiscv->core->prefetch_pc = bootPc;
 		#else
 		if(bootPc != -1) {
-		    #ifdef IBUS_SIMPLE
+		    #if defined(IBUS_SIMPLE) || defined(IBUS_SIMPLE_WISHBONE)
                 top->VexRiscv->IBusSimplePlugin_fetchPc_pcReg = bootPc;
                 #ifdef COMPRESSED
                 top->VexRiscv->IBusSimplePlugin_decodePc_pcReg = bootPc;
@@ -1261,10 +1280,9 @@ public:
 #endif
 
 
-#ifdef IBUS_CACHED_WISHBONE
+#if defined(IBUS_CACHED_WISHBONE) || defined(IBUS_SIMPLE_WISHBONE)
 #include <queue>
 
-
 class IBusCachedWishbone : public SimElement{
 public:
 
@@ -1282,6 +1300,14 @@ public:
 	}
 
 	virtual void preCycle(){
+
+	}
+
+	virtual void postCycle(){
+
+		if(ws->iStall)
+			top->iBusWishbone_ACK = VL_RANDOM_I(7) < 100;
+
         top->iBusWishbone_DAT_MISO = VL_RANDOM_I(32);
         if (top->iBusWishbone_CYC && top->iBusWishbone_STB && top->iBusWishbone_ACK) {
             if(top->iBusWishbone_WE){
@@ -1293,11 +1319,6 @@ public:
             }
         }
 	}
-
-	virtual void postCycle(){
-		if(ws->iStall)
-			top->iBusWishbone_ACK = VL_RANDOM_I(7) < 100;
-	}
 };
 #endif
 
@@ -1398,7 +1419,7 @@ public:
 };
 #endif
 
-#ifdef DBUS_CACHED_WISHBONE
+#if defined(DBUS_CACHED_WISHBONE) || defined(DBUS_SIMPLE_WISHBONE)
 #include <queue>
 
 
@@ -1419,6 +1440,12 @@ public:
 	}
 
 	virtual void preCycle(){
+
+	}
+
+	virtual void postCycle(){
+		if(ws->iStall)
+			top->dBusWishbone_ACK = VL_RANDOM_I(7) < 100;
         top->dBusWishbone_DAT_MISO = VL_RANDOM_I(32);
         if (top->dBusWishbone_CYC && top->dBusWishbone_STB && top->dBusWishbone_ACK) {
             if(top->dBusWishbone_WE){
@@ -1431,11 +1458,6 @@ public:
             }
         }
 	}
-
-	virtual void postCycle(){
-		if(ws->iStall)
-			top->dBusWishbone_ACK = VL_RANDOM_I(7) < 100;
-	}
 };
 #endif
 
@@ -1871,7 +1893,7 @@ void Workspace::fillSimELements(){
 	#ifdef IBUS_CACHED_AVALON
 		simElements.push_back(new IBusCachedAvalon(this));
 	#endif
-	#ifdef IBUS_CACHED_WISHBONE
+	#if defined(IBUS_CACHED_WISHBONE) || defined(IBUS_SIMPLE_WISHBONE)
 		simElements.push_back(new IBusCachedWishbone(this));
 	#endif
 	#ifdef DBUS_SIMPLE
@@ -1886,7 +1908,7 @@ void Workspace::fillSimELements(){
 	#ifdef DBUS_CACHED_AVALON
 		simElements.push_back(new DBusCachedAvalon(this));
 	#endif
-	#ifdef DBUS_CACHED_WISHBONE
+	#if defined(DBUS_CACHED_WISHBONE) || defined(DBUS_SIMPLE_WISHBONE)
 		simElements.push_back(new DBusCachedWishbone(this));
 	#endif
 	#ifdef DEBUG_PLUGIN_STD