运行 dummy_rocc_test 在 zed 板上
Running dummy_rocc_test on zed board
dummy_rocc_test 运行 使用 custom0 指令在尖峰上很好但是当我把它放在 zed 板上并且 运行 它与 ./fesvr-zynq pk dummy_rocc_test 它给了我一个非法指令错误。
我知道这是因为 rocc io 不是但是在火箭芯片的默认配置中，但我想知道如何启用 RoCC 接口以便 运行 dummy_roc_test 在 zed 板上。我尝试将下面列出的值赋予 "BuildRoCC"，如代码段
所示
case BuildRoCC => Some(() => (Module(new AccumulatorExample, { case CoreName => "rocket" })))
但是在制作火箭时，出现以下错误：
[error] /home/prashantravi/rocket-chip/src/main/scala/Configs.scala:100: could not find implicit value for parameter p: cde.Parameters
[error] case BuildRoCC => Some(() => (Module(new AccumulatorExample, { case CoreName => "rocket" })))
[error] ^
[error] one error found
[error] (rocketchip/compile:compileIncremental) Compilation failed
[error] Total time: 8 s, completed Oct 27, 2015 11:24:59 AM
configs.scala代码如下
// See LICENSE for license details.
package rocketchip
import Chisel._
import junctions._
import uncore._
import rocket._
import rocket.Util._
import zscale._
import scala.math.max
import DefaultTestSuites._
import cde.{Parameters, Config, Dump, Knob}
class DefaultConfig extends Config (
topDefinitions = { (pname,site,here) =>
type PF = PartialFunction[Any,Any]
def findBy(sname:Any):Any = here[PF](site[Any](sname))(pname)
def genCsrAddrMap: AddrMap = {
val csrSize = (1 << 12) * (site(XLen) / 8)
val csrs = (0 until site(NTiles)).map{ i =>
AddrMapEntry(s"csr$i", None, MemSize(csrSize, AddrMapConsts.RW))
}
val scrSize = site(HtifKey).nSCR * (site(XLen) / 8)
val scr = AddrMapEntry("scr", None, MemSize(scrSize, AddrMapConsts.RW))
new AddrMap(csrs :+ scr)
}
pname match {
case HtifKey => HtifParameters(
width = Dump("HTIF_WIDTH", 16),
nSCR = 64,
offsetBits = site(CacheBlockOffsetBits),
nCores = site(NTiles))
//Memory Parameters
case PAddrBits => 32
case PgIdxBits => 12
case PgLevels => if (site(XLen) == 64) 3 /* Sv39 */ else 2 /* Sv32 */
case PgLevelBits => site(PgIdxBits) - log2Up(site(XLen)/8)
case VPNBits => site(PgLevels) * site(PgLevelBits)
case PPNBits => site(PAddrBits) - site(PgIdxBits)
case VAddrBits => site(VPNBits) + site(PgIdxBits)
case ASIdBits => 7
case MIFTagBits => Dump("MEM_TAG_BITS",
log2Up(site(NAcquireTransactors)+2) +
log2Up(site(NBanksPerMemoryChannel)) +
log2Up(site(NMemoryChannels)))
case MIFDataBits => Dump("MEM_DATA_BITS", 128)
case MIFAddrBits => Dump("MEM_ADDR_BITS", site(PAddrBits) - site(CacheBlockOffsetBits))
case MIFDataBeats => site(CacheBlockBytes) * 8 / site(MIFDataBits)
case NastiKey => NastiParameters(
dataBits = site(MIFDataBits),
addrBits = site(PAddrBits),
idBits = site(MIFTagBits))
//Params used by all caches
case NSets => findBy(CacheName)
case NWays => findBy(CacheName)
case RowBits => findBy(CacheName)
case NTLBEntries => findBy(CacheName)
case "L1I" => {
case NSets => Knob("L1I_SETS") //64
case NWays => Knob("L1I_WAYS") //4
case RowBits => 4*site(CoreInstBits)
case NTLBEntries => 8
}:PF
case "L1D" => {
case NSets => Knob("L1D_SETS") //64
case NWays => Knob("L1D_WAYS") //4
case RowBits => 2*site(CoreDataBits)
case NTLBEntries => 8
}:PF
case ECCCode => None
case Replacer => () => new RandomReplacement(site(NWays))
case AmoAluOperandBits => site(XLen)
//L1InstCache
case BtbKey => BtbParameters()
//L1DataCache
case WordBits => site(XLen)
case StoreDataQueueDepth => 17
case ReplayQueueDepth => 16
case NMSHRs => Knob("L1D_MSHRS")
case NIOMSHRs => 1
case LRSCCycles => 32
//L2 Memory System Params
case NAcquireTransactors => 7
case L2StoreDataQueueDepth => 1
case L2DirectoryRepresentation => new NullRepresentation(site(NTiles))
case BuildL2CoherenceManager => (p: Parameters) =>
Module(new L2BroadcastHub()(p.alterPartial({
case InnerTLId => "L1toL2"
case OuterTLId => "L2toMC" })))
//Tile Constants
case BuildTiles => {
TestGeneration.addSuites(rv64i.map(_("p")))
TestGeneration.addSuites((if(site(UseVM)) List("pt","v") else List("pt")).flatMap(env => rv64u.map(_(env))))
TestGeneration.addSuites(if(site(NTiles) > 1) List(mtBmarks, bmarks) else List(bmarks))
List.fill(site(NTiles)){ (r: Bool, p: Parameters) =>
Module(new RocketTile(resetSignal = r)(p.alterPartial({case TLId => "L1toL2"})))
}
}
case BuildRoCC => Some(() => (Module(new AccumulatorExample, { case CoreName => "rocket" })))
case RoccNMemChannels => 1
//Rocket Core Constants
case FetchWidth => 1
case RetireWidth => 1
case UseVM => true
case UsePerfCounters => true
case FastLoadWord => true
case FastLoadByte => false
case FastMulDiv => true
case XLen => 64
case UseFPU => {
val env = if(site(UseVM)) List("p","pt","v") else List("p","pt")
if(site(FDivSqrt)) TestGeneration.addSuites(env.map(rv64uf))
else TestGeneration.addSuites(env.map(rv64ufNoDiv))
true
}
case FDivSqrt => true
case SFMALatency => 2
case DFMALatency => 3
case CoreInstBits => 32
case CoreDataBits => site(XLen)
case NCustomMRWCSRs => 0
//Uncore Paramters
case RTCPeriod => 100 // gives 10 MHz RTC assuming 1 GHz uncore clock
case LNEndpoints => site(TLKey(site(TLId))).nManagers + site(TLKey(site(TLId))).nClients
case LNHeaderBits => log2Ceil(site(TLKey(site(TLId))).nManagers) +
log2Up(site(TLKey(site(TLId))).nClients)
case TLKey("L1toL2") =>
TileLinkParameters(
coherencePolicy = new MESICoherence(site(L2DirectoryRepresentation)),
nManagers = site(NBanksPerMemoryChannel)*site(NMemoryChannels),
nCachingClients = site(NTiles),
nCachelessClients = 1 + site(NTiles) *
(1 + (if(site(BuildRoCC).isEmpty) 0 else site(RoccNMemChannels))),
maxClientXacts = max(site(NMSHRs) + site(NIOMSHRs),
if(site(BuildRoCC).isEmpty) 1 else site(RoccMaxTaggedMemXacts)),
maxClientsPerPort = if(site(BuildRoCC).isEmpty) 1 else 2,
maxManagerXacts = site(NAcquireTransactors) + 2,
dataBits = site(CacheBlockBytes)*8)
case TLKey("L2toMC") =>
TileLinkParameters(
coherencePolicy = new MEICoherence(new NullRepresentation(site(NBanksPerMemoryChannel))),
nManagers = 1,
nCachingClients = site(NBanksPerMemoryChannel),
nCachelessClients = 0,
maxClientXacts = 1,
maxClientsPerPort = site(NAcquireTransactors) + 2,
maxManagerXacts = 1,
dataBits = site(CacheBlockBytes)*8)
case TLKey("Outermost") => site(TLKey("L2toMC")).copy(dataBeats = site(MIFDataBeats))
case NTiles => Knob("NTILES")
case NMemoryChannels => 1
case NBanksPerMemoryChannel => Knob("NBANKS")
case NOutstandingMemReqsPerChannel => site(NBanksPerMemoryChannel)*(site(NAcquireTransactors)+2)
case BankIdLSB => 0
case CacheBlockBytes => 64
case CacheBlockOffsetBits => log2Up(here(CacheBlockBytes))
case UseBackupMemoryPort => true
case MMIOBase => BigInt(1 << 30) // 1 GB
case ExternalIOStart => 2 * site(MMIOBase)
case GlobalAddrMap => AddrMap(
AddrMapEntry("mem", None, MemSize(site(MMIOBase), AddrMapConsts.RWX)),
AddrMapEntry("conf", None, MemSubmap(site(ExternalIOStart) - site(MMIOBase), genCsrAddrMap)),
AddrMapEntry("io", Some(site(ExternalIOStart)), MemSize(2 * site(MMIOBase), AddrMapConsts.RW)))
}},
knobValues = {
case "NTILES" => 1
case "NBANKS" => 1
case "L1D_MSHRS" => 2
case "L1D_SETS" => 64
case "L1D_WAYS" => 4
case "L1I_SETS" => 64
case "L1I_WAYS" => 4
}
)
class DefaultVLSIConfig extends DefaultConfig
class DefaultCPPConfig extends DefaultConfig
class With2Cores extends Config(knobValues = { case "NTILES" => 2 })
class With4Cores extends Config(knobValues = { case "NTILES" => 4 })
class With8Cores extends Config(knobValues = { case "NTILES" => 8 })
class With2Banks extends Config(knobValues = { case "NBANKS" => 2 })
class With4Banks extends Config(knobValues = { case "NBANKS" => 4 })
class With8Banks extends Config(knobValues = { case "NBANKS" => 8 })
class WithL2Cache extends Config(
(pname,site,here) => pname match {
case "L2_CAPACITY_IN_KB" => Knob("L2_CAPACITY_IN_KB")
case "L2Bank" => {
case NSets => (((here[Int]("L2_CAPACITY_IN_KB")*1024) /
site(CacheBlockBytes)) /
site(NBanksPerMemoryChannel)*site(NMemoryChannels)) /
site(NWays)
case NWays => Knob("L2_WAYS")
case RowBits => site(TLKey(site(TLId))).dataBitsPerBeat
}: PartialFunction[Any,Any]
case NAcquireTransactors => 2
case NSecondaryMisses => 4
case L2DirectoryRepresentation => new FullRepresentation(site(NTiles))
case BuildL2CoherenceManager => (p: Parameters) =>
Module(new L2HellaCacheBank()(p.alterPartial({
case CacheName => "L2Bank"
case InnerTLId => "L1toL2"
case OuterTLId => "L2toMC"})))
},
knobValues = { case "L2_WAYS" => 8; case "L2_CAPACITY_IN_KB" => 2048 }
)
class WithL2Capacity2048 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 2048 })
class WithL2Capacity1024 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 1024 })
class WithL2Capacity512 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 512 })
class WithL2Capacity256 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 256 })
class WithL2Capacity128 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 128 })
class WithL2Capacity64 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 64 })
class DefaultL2Config extends Config(new WithL2Cache ++ new DefaultConfig)
class DefaultL2VLSIConfig extends Config(new WithL2Cache ++ new DefaultVLSIConfig)
class DefaultL2CPPConfig extends Config(new WithL2Cache ++ new DefaultCPPConfig)
class DefaultL2FPGAConfig extends Config(new WithL2Capacity64 ++ new WithL2Cache ++ new DefaultFPGAConfig)
class WithZscale extends Config(
(pname,site,here) => pname match {
case BuildZscale => {
TestGeneration.addSuites(List(rv32ui("p"), rv32um("p")))
TestGeneration.addSuites(List(zscaleBmarks))
(r: Bool, p: Parameters) => Module(new Zscale(r)(p))
}
case BootROMCapacity => Dump("BOOT_CAPACITY", 16*1024)
case DRAMCapacity => Dump("DRAM_CAPACITY", 64*1024*1024)
}
)
class ZscaleConfig extends Config(new WithZscale ++ new DefaultConfig)
class FPGAConfig extends Config (
(pname,site,here) => pname match {
case NAcquireTransactors => 4
case UseBackupMemoryPort => false
}
)
class DefaultFPGAConfig extends Config(new FPGAConfig ++ new DefaultConfig)
class SmallConfig extends Config (
topDefinitions = { (pname,site,here) => pname match {
case UseFPU => false
case FastMulDiv => false
case NTLBEntries => 4
case BtbKey => BtbParameters(nEntries = 8)
}},
knobValues = {
case "L1D_SETS" => 64
case "L1D_WAYS" => 1
case "L1I_SETS" => 64
case "L1I_WAYS" => 1
}
)
class DefaultFPGASmallConfig extends Config(new SmallConfig ++ new DefaultFPGAConfig)
class ExampleSmallConfig extends Config(new SmallConfig ++ new DefaultConfig)
class MultibankConfig extends Config(new With2Banks ++ new DefaultConfig)
class MultibankL2Config extends Config(
new With2Banks ++ new WithL2Cache ++ new DefaultConfig)
Rocc.scala给出实际累加器例子如下
// See LICENSE for license details.
package rocket
import Chisel._
import uncore._
import Util._
import cde.{Parameters, Field}
case object RoccMaxTaggedMemXacts extends Field[Int]
case object RoccNMemChannels extends Field[Int]
class RoCCInstruction extends Bundle
{
val funct = Bits(width = 7)
val rs2 = Bits(width = 5)
val rs1 = Bits(width = 5)
val xd = Bool()
val xs1 = Bool()
val xs2 = Bool()
val rd = Bits(width = 5)
val opcode = Bits(width = 7)
}
class RoCCCommand(implicit p: Parameters) extends CoreBundle()(p) {
val inst = new RoCCInstruction
val rs1 = Bits(width = xLen)
val rs2 = Bits(width = xLen)
}
class RoCCResponse(implicit p: Parameters) extends CoreBundle()(p) {
val rd = Bits(width = 5)
val data = Bits(width = xLen)
}
class RoCCInterface(implicit p: Parameters) extends Bundle {
val cmd = Decoupled(new RoCCCommand).flip
val resp = Decoupled(new RoCCResponse)
val mem = new HellaCacheIO()(p.alterPartial({ case CacheName => "L1D" }))
val busy = Bool(OUTPUT)
val s = Bool(INPUT)
val interrupt = Bool(OUTPUT)
// These should be handled differently, eventually
val imem = new ClientUncachedTileLinkIO
val dmem = Vec(p(RoccNMemChannels), new ClientUncachedTileLinkIO)
val iptw = new TLBPTWIO
val dptw = new TLBPTWIO
val pptw = new TLBPTWIO
val exception = Bool(INPUT)
}
abstract class RoCC(implicit p: Parameters) extends CoreModule()(p) {
val io = new RoCCInterface
io.mem.req.bits.phys := Bool(true) // don't perform address translation
}
class AccumulatorExample(n: Int = 4)(implicit p: Parameters) extends RoCC()(p) {
val regfile = Mem(UInt(width = xLen), n)
val busy = Reg(init=Vec(Bool(false), n))
val cmd = Queue(io.cmd)
val funct = cmd.bits.inst.funct
val addr = cmd.bits.inst.rs2(log2Up(n)-1,0)
val doWrite = funct === UInt(0)
val doRead = funct === UInt(1)
val doLoad = funct === UInt(2)
val doAccum = funct === UInt(3)
val memRespTag = io.mem.resp.bits.tag(log2Up(n)-1,0)
// datapath
val addend = cmd.bits.rs1
val accum = regfile(addr)
val wdata = Mux(doWrite, addend, accum + addend)
when (cmd.fire() && (doWrite || doAccum)) {
regfile(addr) := wdata
}
when (io.mem.resp.valid) {
regfile(memRespTag) := io.mem.resp.bits.data
}
// control
when (io.mem.req.fire()) {
busy(addr) := Bool(true)
}
when (io.mem.resp.valid) {
busy(memRespTag) := Bool(false)
}
val doResp = cmd.bits.inst.xd
val stallReg = busy(addr)
val stallLoad = doLoad && !io.mem.req.ready
val stallResp = doResp && !io.resp.ready
cmd.ready := !stallReg && !stallLoad && !stallResp
// command resolved if no stalls AND not issuing a load that will need a request
// PROC RESPONSE INTERFACE
io.resp.valid := cmd.valid && doResp && !stallReg && !stallLoad
// valid response if valid command, need a response, and no stalls
io.resp.bits.rd := cmd.bits.inst.rd
// Must respond with the appropriate tag or undefined behavior
io.resp.bits.data := accum
// Semantics is to always send out prior accumulator register value
io.busy := cmd.valid || busy.reduce(_||_)
// Be busy when have pending memory requests or committed possibility of pending requests
io.interrupt := Bool(false)
// Set this true to trigger an interrupt on the processor (please refer to supervisor documentation)
// MEMORY REQUEST INTERFACE
io.mem.req.valid := cmd.valid && doLoad && !stallReg && !stallResp
io.mem.req.bits.addr := addend
io.mem.req.bits.tag := addr
io.mem.req.bits.cmd := M_XRD // perform a load (M_XWR for stores)
io.mem.req.bits.typ := MT_D // D = 8 bytes, W = 4, H = 2, B = 1
io.mem.req.bits.data := Bits(0) // we're not performing any stores...
io.mem.invalidate_lr := false
io.imem.acquire.valid := false
io.imem.grant.ready := false
io.dmem.head.acquire.valid := false
io.dmem.head.grant.ready := false
io.iptw.req.valid := false
io.dptw.req.valid := false
io.pptw.req.valid := false
}
最好查看 Configs.scala 的完整源代码，但 Module 构造函数似乎缺少一个隐式参数。如果将 (implicit p: Parameters) 添加到包含上述语句（第 100 行）的方法中，代码应该可以工作。
问题已通过将以下代码添加到 configs.scala
中解决
class WithAccumRocc extends Config(
(pname,site,here) => pname match {
case RoccNMemChannels => 1
case RoccMaxTaggedMemXacts => 0
case BuildRoCC => {
Some((p: Parameters) =>
Module(new AccumulatorExample()(p.alterPartial({ case CoreName => "AccumRocc" }))))
}
}
)
class WithRoCCConfig extends Config(new WithAccumRocc ++ new DefaultFPGAConfig)
在使用新配置构建火箭之后，即使火箭 CONFIG=WithRoCCConfig
也不要忘记使用相同的配置参数重新生成 vivado 项目和比特流。
dummy_rocc_test 运行 使用 custom0 指令在尖峰上很好但是当我把它放在 zed 板上并且 运行 它与 ./fesvr-zynq pk dummy_rocc_test 它给了我一个非法指令错误。
我知道这是因为 rocc io 不是但是在火箭芯片的默认配置中，但我想知道如何启用 RoCC 接口以便 运行 dummy_roc_test 在 zed 板上。我尝试将下面列出的值赋予 "BuildRoCC"，如代码段
所示case BuildRoCC => Some(() => (Module(new AccumulatorExample, { case CoreName => "rocket" })))
但是在制作火箭时，出现以下错误：
[error] /home/prashantravi/rocket-chip/src/main/scala/Configs.scala:100: could not find implicit value for parameter p: cde.Parameters
[error] case BuildRoCC => Some(() => (Module(new AccumulatorExample, { case CoreName => "rocket" })))
[error] ^
[error] one error found
[error] (rocketchip/compile:compileIncremental) Compilation failed
[error] Total time: 8 s, completed Oct 27, 2015 11:24:59 AM
configs.scala代码如下
// See LICENSE for license details.
package rocketchip
import Chisel._
import junctions._
import uncore._
import rocket._
import rocket.Util._
import zscale._
import scala.math.max
import DefaultTestSuites._
import cde.{Parameters, Config, Dump, Knob}
class DefaultConfig extends Config (
topDefinitions = { (pname,site,here) =>
type PF = PartialFunction[Any,Any]
def findBy(sname:Any):Any = here[PF](site[Any](sname))(pname)
def genCsrAddrMap: AddrMap = {
val csrSize = (1 << 12) * (site(XLen) / 8)
val csrs = (0 until site(NTiles)).map{ i =>
AddrMapEntry(s"csr$i", None, MemSize(csrSize, AddrMapConsts.RW))
}
val scrSize = site(HtifKey).nSCR * (site(XLen) / 8)
val scr = AddrMapEntry("scr", None, MemSize(scrSize, AddrMapConsts.RW))
new AddrMap(csrs :+ scr)
}
pname match {
case HtifKey => HtifParameters(
width = Dump("HTIF_WIDTH", 16),
nSCR = 64,
offsetBits = site(CacheBlockOffsetBits),
nCores = site(NTiles))
//Memory Parameters
case PAddrBits => 32
case PgIdxBits => 12
case PgLevels => if (site(XLen) == 64) 3 /* Sv39 */ else 2 /* Sv32 */
case PgLevelBits => site(PgIdxBits) - log2Up(site(XLen)/8)
case VPNBits => site(PgLevels) * site(PgLevelBits)
case PPNBits => site(PAddrBits) - site(PgIdxBits)
case VAddrBits => site(VPNBits) + site(PgIdxBits)
case ASIdBits => 7
case MIFTagBits => Dump("MEM_TAG_BITS",
log2Up(site(NAcquireTransactors)+2) +
log2Up(site(NBanksPerMemoryChannel)) +
log2Up(site(NMemoryChannels)))
case MIFDataBits => Dump("MEM_DATA_BITS", 128)
case MIFAddrBits => Dump("MEM_ADDR_BITS", site(PAddrBits) - site(CacheBlockOffsetBits))
case MIFDataBeats => site(CacheBlockBytes) * 8 / site(MIFDataBits)
case NastiKey => NastiParameters(
dataBits = site(MIFDataBits),
addrBits = site(PAddrBits),
idBits = site(MIFTagBits))
//Params used by all caches
case NSets => findBy(CacheName)
case NWays => findBy(CacheName)
case RowBits => findBy(CacheName)
case NTLBEntries => findBy(CacheName)
case "L1I" => {
case NSets => Knob("L1I_SETS") //64
case NWays => Knob("L1I_WAYS") //4
case RowBits => 4*site(CoreInstBits)
case NTLBEntries => 8
}:PF
case "L1D" => {
case NSets => Knob("L1D_SETS") //64
case NWays => Knob("L1D_WAYS") //4
case RowBits => 2*site(CoreDataBits)
case NTLBEntries => 8
}:PF
case ECCCode => None
case Replacer => () => new RandomReplacement(site(NWays))
case AmoAluOperandBits => site(XLen)
//L1InstCache
case BtbKey => BtbParameters()
//L1DataCache
case WordBits => site(XLen)
case StoreDataQueueDepth => 17
case ReplayQueueDepth => 16
case NMSHRs => Knob("L1D_MSHRS")
case NIOMSHRs => 1
case LRSCCycles => 32
//L2 Memory System Params
case NAcquireTransactors => 7
case L2StoreDataQueueDepth => 1
case L2DirectoryRepresentation => new NullRepresentation(site(NTiles))
case BuildL2CoherenceManager => (p: Parameters) =>
Module(new L2BroadcastHub()(p.alterPartial({
case InnerTLId => "L1toL2"
case OuterTLId => "L2toMC" })))
//Tile Constants
case BuildTiles => {
TestGeneration.addSuites(rv64i.map(_("p")))
TestGeneration.addSuites((if(site(UseVM)) List("pt","v") else List("pt")).flatMap(env => rv64u.map(_(env))))
TestGeneration.addSuites(if(site(NTiles) > 1) List(mtBmarks, bmarks) else List(bmarks))
List.fill(site(NTiles)){ (r: Bool, p: Parameters) =>
Module(new RocketTile(resetSignal = r)(p.alterPartial({case TLId => "L1toL2"})))
}
}
case BuildRoCC => Some(() => (Module(new AccumulatorExample, { case CoreName => "rocket" })))
case RoccNMemChannels => 1
//Rocket Core Constants
case FetchWidth => 1
case RetireWidth => 1
case UseVM => true
case UsePerfCounters => true
case FastLoadWord => true
case FastLoadByte => false
case FastMulDiv => true
case XLen => 64
case UseFPU => {
val env = if(site(UseVM)) List("p","pt","v") else List("p","pt")
if(site(FDivSqrt)) TestGeneration.addSuites(env.map(rv64uf))
else TestGeneration.addSuites(env.map(rv64ufNoDiv))
true
}
case FDivSqrt => true
case SFMALatency => 2
case DFMALatency => 3
case CoreInstBits => 32
case CoreDataBits => site(XLen)
case NCustomMRWCSRs => 0
//Uncore Paramters
case RTCPeriod => 100 // gives 10 MHz RTC assuming 1 GHz uncore clock
case LNEndpoints => site(TLKey(site(TLId))).nManagers + site(TLKey(site(TLId))).nClients
case LNHeaderBits => log2Ceil(site(TLKey(site(TLId))).nManagers) +
log2Up(site(TLKey(site(TLId))).nClients)
case TLKey("L1toL2") =>
TileLinkParameters(
coherencePolicy = new MESICoherence(site(L2DirectoryRepresentation)),
nManagers = site(NBanksPerMemoryChannel)*site(NMemoryChannels),
nCachingClients = site(NTiles),
nCachelessClients = 1 + site(NTiles) *
(1 + (if(site(BuildRoCC).isEmpty) 0 else site(RoccNMemChannels))),
maxClientXacts = max(site(NMSHRs) + site(NIOMSHRs),
if(site(BuildRoCC).isEmpty) 1 else site(RoccMaxTaggedMemXacts)),
maxClientsPerPort = if(site(BuildRoCC).isEmpty) 1 else 2,
maxManagerXacts = site(NAcquireTransactors) + 2,
dataBits = site(CacheBlockBytes)*8)
case TLKey("L2toMC") =>
TileLinkParameters(
coherencePolicy = new MEICoherence(new NullRepresentation(site(NBanksPerMemoryChannel))),
nManagers = 1,
nCachingClients = site(NBanksPerMemoryChannel),
nCachelessClients = 0,
maxClientXacts = 1,
maxClientsPerPort = site(NAcquireTransactors) + 2,
maxManagerXacts = 1,
dataBits = site(CacheBlockBytes)*8)
case TLKey("Outermost") => site(TLKey("L2toMC")).copy(dataBeats = site(MIFDataBeats))
case NTiles => Knob("NTILES")
case NMemoryChannels => 1
case NBanksPerMemoryChannel => Knob("NBANKS")
case NOutstandingMemReqsPerChannel => site(NBanksPerMemoryChannel)*(site(NAcquireTransactors)+2)
case BankIdLSB => 0
case CacheBlockBytes => 64
case CacheBlockOffsetBits => log2Up(here(CacheBlockBytes))
case UseBackupMemoryPort => true
case MMIOBase => BigInt(1 << 30) // 1 GB
case ExternalIOStart => 2 * site(MMIOBase)
case GlobalAddrMap => AddrMap(
AddrMapEntry("mem", None, MemSize(site(MMIOBase), AddrMapConsts.RWX)),
AddrMapEntry("conf", None, MemSubmap(site(ExternalIOStart) - site(MMIOBase), genCsrAddrMap)),
AddrMapEntry("io", Some(site(ExternalIOStart)), MemSize(2 * site(MMIOBase), AddrMapConsts.RW)))
}},
knobValues = {
case "NTILES" => 1
case "NBANKS" => 1
case "L1D_MSHRS" => 2
case "L1D_SETS" => 64
case "L1D_WAYS" => 4
case "L1I_SETS" => 64
case "L1I_WAYS" => 4
}
)
class DefaultVLSIConfig extends DefaultConfig
class DefaultCPPConfig extends DefaultConfig
class With2Cores extends Config(knobValues = { case "NTILES" => 2 })
class With4Cores extends Config(knobValues = { case "NTILES" => 4 })
class With8Cores extends Config(knobValues = { case "NTILES" => 8 })
class With2Banks extends Config(knobValues = { case "NBANKS" => 2 })
class With4Banks extends Config(knobValues = { case "NBANKS" => 4 })
class With8Banks extends Config(knobValues = { case "NBANKS" => 8 })
class WithL2Cache extends Config(
(pname,site,here) => pname match {
case "L2_CAPACITY_IN_KB" => Knob("L2_CAPACITY_IN_KB")
case "L2Bank" => {
case NSets => (((here[Int]("L2_CAPACITY_IN_KB")*1024) /
site(CacheBlockBytes)) /
site(NBanksPerMemoryChannel)*site(NMemoryChannels)) /
site(NWays)
case NWays => Knob("L2_WAYS")
case RowBits => site(TLKey(site(TLId))).dataBitsPerBeat
}: PartialFunction[Any,Any]
case NAcquireTransactors => 2
case NSecondaryMisses => 4
case L2DirectoryRepresentation => new FullRepresentation(site(NTiles))
case BuildL2CoherenceManager => (p: Parameters) =>
Module(new L2HellaCacheBank()(p.alterPartial({
case CacheName => "L2Bank"
case InnerTLId => "L1toL2"
case OuterTLId => "L2toMC"})))
},
knobValues = { case "L2_WAYS" => 8; case "L2_CAPACITY_IN_KB" => 2048 }
)
class WithL2Capacity2048 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 2048 })
class WithL2Capacity1024 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 1024 })
class WithL2Capacity512 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 512 })
class WithL2Capacity256 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 256 })
class WithL2Capacity128 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 128 })
class WithL2Capacity64 extends Config(knobValues = { case "L2_CAPACITY_IN_KB" => 64 })
class DefaultL2Config extends Config(new WithL2Cache ++ new DefaultConfig)
class DefaultL2VLSIConfig extends Config(new WithL2Cache ++ new DefaultVLSIConfig)
class DefaultL2CPPConfig extends Config(new WithL2Cache ++ new DefaultCPPConfig)
class DefaultL2FPGAConfig extends Config(new WithL2Capacity64 ++ new WithL2Cache ++ new DefaultFPGAConfig)
class WithZscale extends Config(
(pname,site,here) => pname match {
case BuildZscale => {
TestGeneration.addSuites(List(rv32ui("p"), rv32um("p")))
TestGeneration.addSuites(List(zscaleBmarks))
(r: Bool, p: Parameters) => Module(new Zscale(r)(p))
}
case BootROMCapacity => Dump("BOOT_CAPACITY", 16*1024)
case DRAMCapacity => Dump("DRAM_CAPACITY", 64*1024*1024)
}
)
class ZscaleConfig extends Config(new WithZscale ++ new DefaultConfig)
class FPGAConfig extends Config (
(pname,site,here) => pname match {
case NAcquireTransactors => 4
case UseBackupMemoryPort => false
}
)
class DefaultFPGAConfig extends Config(new FPGAConfig ++ new DefaultConfig)
class SmallConfig extends Config (
topDefinitions = { (pname,site,here) => pname match {
case UseFPU => false
case FastMulDiv => false
case NTLBEntries => 4
case BtbKey => BtbParameters(nEntries = 8)
}},
knobValues = {
case "L1D_SETS" => 64
case "L1D_WAYS" => 1
case "L1I_SETS" => 64
case "L1I_WAYS" => 1
}
)
class DefaultFPGASmallConfig extends Config(new SmallConfig ++ new DefaultFPGAConfig)
class ExampleSmallConfig extends Config(new SmallConfig ++ new DefaultConfig)
class MultibankConfig extends Config(new With2Banks ++ new DefaultConfig)
class MultibankL2Config extends Config(
new With2Banks ++ new WithL2Cache ++ new DefaultConfig)
Rocc.scala给出实际累加器例子如下
// See LICENSE for license details.
package rocket
import Chisel._
import uncore._
import Util._
import cde.{Parameters, Field}
case object RoccMaxTaggedMemXacts extends Field[Int]
case object RoccNMemChannels extends Field[Int]
class RoCCInstruction extends Bundle
{
val funct = Bits(width = 7)
val rs2 = Bits(width = 5)
val rs1 = Bits(width = 5)
val xd = Bool()
val xs1 = Bool()
val xs2 = Bool()
val rd = Bits(width = 5)
val opcode = Bits(width = 7)
}
class RoCCCommand(implicit p: Parameters) extends CoreBundle()(p) {
val inst = new RoCCInstruction
val rs1 = Bits(width = xLen)
val rs2 = Bits(width = xLen)
}
class RoCCResponse(implicit p: Parameters) extends CoreBundle()(p) {
val rd = Bits(width = 5)
val data = Bits(width = xLen)
}
class RoCCInterface(implicit p: Parameters) extends Bundle {
val cmd = Decoupled(new RoCCCommand).flip
val resp = Decoupled(new RoCCResponse)
val mem = new HellaCacheIO()(p.alterPartial({ case CacheName => "L1D" }))
val busy = Bool(OUTPUT)
val s = Bool(INPUT)
val interrupt = Bool(OUTPUT)
// These should be handled differently, eventually
val imem = new ClientUncachedTileLinkIO
val dmem = Vec(p(RoccNMemChannels), new ClientUncachedTileLinkIO)
val iptw = new TLBPTWIO
val dptw = new TLBPTWIO
val pptw = new TLBPTWIO
val exception = Bool(INPUT)
}
abstract class RoCC(implicit p: Parameters) extends CoreModule()(p) {
val io = new RoCCInterface
io.mem.req.bits.phys := Bool(true) // don't perform address translation
}
class AccumulatorExample(n: Int = 4)(implicit p: Parameters) extends RoCC()(p) {
val regfile = Mem(UInt(width = xLen), n)
val busy = Reg(init=Vec(Bool(false), n))
val cmd = Queue(io.cmd)
val funct = cmd.bits.inst.funct
val addr = cmd.bits.inst.rs2(log2Up(n)-1,0)
val doWrite = funct === UInt(0)
val doRead = funct === UInt(1)
val doLoad = funct === UInt(2)
val doAccum = funct === UInt(3)
val memRespTag = io.mem.resp.bits.tag(log2Up(n)-1,0)
// datapath
val addend = cmd.bits.rs1
val accum = regfile(addr)
val wdata = Mux(doWrite, addend, accum + addend)
when (cmd.fire() && (doWrite || doAccum)) {
regfile(addr) := wdata
}
when (io.mem.resp.valid) {
regfile(memRespTag) := io.mem.resp.bits.data
}
// control
when (io.mem.req.fire()) {
busy(addr) := Bool(true)
}
when (io.mem.resp.valid) {
busy(memRespTag) := Bool(false)
}
val doResp = cmd.bits.inst.xd
val stallReg = busy(addr)
val stallLoad = doLoad && !io.mem.req.ready
val stallResp = doResp && !io.resp.ready
cmd.ready := !stallReg && !stallLoad && !stallResp
// command resolved if no stalls AND not issuing a load that will need a request
// PROC RESPONSE INTERFACE
io.resp.valid := cmd.valid && doResp && !stallReg && !stallLoad
// valid response if valid command, need a response, and no stalls
io.resp.bits.rd := cmd.bits.inst.rd
// Must respond with the appropriate tag or undefined behavior
io.resp.bits.data := accum
// Semantics is to always send out prior accumulator register value
io.busy := cmd.valid || busy.reduce(_||_)
// Be busy when have pending memory requests or committed possibility of pending requests
io.interrupt := Bool(false)
// Set this true to trigger an interrupt on the processor (please refer to supervisor documentation)
// MEMORY REQUEST INTERFACE
io.mem.req.valid := cmd.valid && doLoad && !stallReg && !stallResp
io.mem.req.bits.addr := addend
io.mem.req.bits.tag := addr
io.mem.req.bits.cmd := M_XRD // perform a load (M_XWR for stores)
io.mem.req.bits.typ := MT_D // D = 8 bytes, W = 4, H = 2, B = 1
io.mem.req.bits.data := Bits(0) // we're not performing any stores...
io.mem.invalidate_lr := false
io.imem.acquire.valid := false
io.imem.grant.ready := false
io.dmem.head.acquire.valid := false
io.dmem.head.grant.ready := false
io.iptw.req.valid := false
io.dptw.req.valid := false
io.pptw.req.valid := false
}
最好查看 Configs.scala 的完整源代码，但 Module 构造函数似乎缺少一个隐式参数。如果将 (implicit p: Parameters) 添加到包含上述语句（第 100 行）的方法中，代码应该可以工作。
问题已通过将以下代码添加到 configs.scala
中解决class WithAccumRocc extends Config(
(pname,site,here) => pname match {
case RoccNMemChannels => 1
case RoccMaxTaggedMemXacts => 0
case BuildRoCC => {
Some((p: Parameters) =>
Module(new AccumulatorExample()(p.alterPartial({ case CoreName => "AccumRocc" }))))
}
}
)
class WithRoCCConfig extends Config(new WithAccumRocc ++ new DefaultFPGAConfig)
在使用新配置构建火箭之后，即使火箭 CONFIG=WithRoCCConfig
也不要忘记使用相同的配置参数重新生成 vivado 项目和比特流。