diff --git a/src/main/scala/vexriscv/demo/VexRiscvAxi4Linux.scala b/src/main/scala/vexriscv/demo/VexRiscvAxi4Linux.scala new file mode 100644 index 0000000..ff2ff11 --- /dev/null +++ b/src/main/scala/vexriscv/demo/VexRiscvAxi4Linux.scala @@ -0,0 +1,157 @@ +package vexriscv.demo + +import spinal.core._ +import spinal.lib._ +import spinal.lib.bus.amba4.axi.Axi4ReadOnly +import spinal.lib.com.jtag.Jtag +import spinal.lib.eda.altera.{InterruptReceiverTag, ResetEmitterTag} +import vexriscv.ip.{DataCacheConfig, InstructionCacheConfig} +import vexriscv.plugin._ +import vexriscv.{Riscv, VexRiscv, VexRiscvConfig, plugin} + + +object VexRiscvAxi4Linux{ + def main(args: Array[String]) { + val report = SpinalVerilog{ + + //CPU configuration + val cpuConfig = VexRiscvConfig( + plugins = List( + new PcManagerSimplePlugin(0x00000000l, false), + new IBusCachedPlugin( + prediction = STATIC, + config = InstructionCacheConfig( + cacheSize = 4096, + bytePerLine = 64, + wayCount = 1, + addressWidth = 32, + cpuDataWidth = 32, + memDataWidth = 32, + catchIllegalAccess = true, + catchAccessFault = true, + asyncTagMemory = false, + twoCycleRam = true, + twoCycleCache = true + ), + memoryTranslatorPortConfig = MmuPortConfig( + portTlbSize = 4, + latency = 1, + earlyRequireMmuLockup = true, + earlyCacheHits = true + ) + ), + new DBusCachedPlugin( + config = new DataCacheConfig( + cacheSize = 4096, + bytePerLine = 64, + wayCount = 1, + addressWidth = 32, + cpuDataWidth = 32, + memDataWidth = 32, + catchAccessError = true, + catchIllegal = true, + catchUnaligned = true, + withLrSc = true, + withAmo = true + ), + memoryTranslatorPortConfig = MmuPortConfig( + portTlbSize = 4, + latency = 1, + earlyRequireMmuLockup = true, + earlyCacheHits = true + ) + ), + new MmuPlugin( + ioRange = _(31 downto 28) === 0xF + ), + new DecoderSimplePlugin( + catchIllegalInstruction = true + ), + new RegFilePlugin( + regFileReadyKind = plugin.SYNC, + zeroBoot = false + ), + new IntAluPlugin, + new SrcPlugin( + separatedAddSub = false, + executeInsertion = true + ), + new FullBarrelShifterPlugin, + new MulPlugin, + new DivPlugin, + new HazardSimplePlugin( + bypassExecute = true, + bypassMemory = true, + bypassWriteBack = true, + bypassWriteBackBuffer = true, + pessimisticUseSrc = false, + pessimisticWriteRegFile = false, + pessimisticAddressMatch = false + ), + new DebugPlugin(ClockDomain.current.clone(reset = Bool().setName("debugReset"))), + new BranchPlugin( + earlyBranch = false, + catchAddressMisaligned = true + ), + new CsrPlugin(CsrPluginConfig.openSbi(mhartid = 0, misa = Riscv.misaToInt(s"ima")).copy(utimeAccess = CsrAccess.READ_ONLY)), + new YamlPlugin("cpu0.yaml") + ) + ) + + //CPU instanciation + val cpu = new VexRiscv(cpuConfig) + + //CPU modifications to be an Avalon one + cpu.setDefinitionName("VexRiscvAxi4") + cpu.rework { + var iBus : Axi4ReadOnly = null + for (plugin <- cpuConfig.plugins) plugin match { + case plugin: IBusSimplePlugin => { + plugin.iBus.setAsDirectionLess() //Unset IO properties of iBus + iBus = master(plugin.iBus.toAxi4ReadOnly().toFullConfig()) + .setName("iBusAxi") + .addTag(ClockDomainTag(ClockDomain.current)) //Specify a clock domain to the iBus (used by QSysify) + } + case plugin: IBusCachedPlugin => { + plugin.iBus.setAsDirectionLess() //Unset IO properties of iBus + iBus = master(plugin.iBus.toAxi4ReadOnly().toFullConfig()) + .setName("iBusAxi") + .addTag(ClockDomainTag(ClockDomain.current)) //Specify a clock domain to the iBus (used by QSysify) + } + case plugin: DBusSimplePlugin => { + plugin.dBus.setAsDirectionLess() + master(plugin.dBus.toAxi4Shared().toAxi4().toFullConfig()) + .setName("dBusAxi") + .addTag(ClockDomainTag(ClockDomain.current)) + } + case plugin: DBusCachedPlugin => { + plugin.dBus.setAsDirectionLess() + master(plugin.dBus.toAxi4Shared().toAxi4().toFullConfig()) + .setName("dBusAxi") + .addTag(ClockDomainTag(ClockDomain.current)) + } + case plugin: DebugPlugin => plugin.debugClockDomain { + plugin.io.bus.setAsDirectionLess() + val jtag = slave(new Jtag()) + .setName("jtag") + jtag <> plugin.io.bus.fromJtag() + plugin.io.resetOut + .addTag(ResetEmitterTag(plugin.debugClockDomain)) + .parent = null //Avoid the io bundle to be interpreted as a QSys conduit + } + case _ => + } + for (plugin <- cpuConfig.plugins) plugin match { + case plugin: CsrPlugin => { + plugin.externalInterrupt + .addTag(InterruptReceiverTag(iBus, ClockDomain.current)) + plugin.timerInterrupt + .addTag(InterruptReceiverTag(iBus, ClockDomain.current)) + } + case _ => + } + } + cpu + } + } +}