rocket-chip/src/main/scala/PublicConfigs.scala

package referencechip

import Chisel._
import uncore._
import rocket._
import rocket.Util._

class DefaultVLSIConfig extends DefaultConfig
class DefaultFPGAConfig extends DefaultConfig
class DefaultCPPConfig extends DefaultConfig
class DefaultConfig extends ChiselConfig {
  val top:World.TopDefs = {
    (pname,site,here) => pname match {
      //Params used by all caches
      case ECCCode => None
      case WordBits => site(XprLen)
      case Replacer => () => new RandomReplacement(site(NWays))
      case BlockOffBits => site(CacheName) match {
        case "L1I" | "L1D" => log2Up(site(TLDataBits)/8)
        case "L2" => 0
      }
      case NSets => site(CacheName) match {
        case "L1I" => 128
        case "L1D" => 128
        case "L2" => 512 
      }
      case NWays => site(CacheName) match {
        case "L1I" => 2
        case "L1D" => 4
        case "L2" => 8
      }
      case RowBits => site(CacheName) match {
        case "L1I" => 4*site(CoreInstBits)
        case "L1D" => 2*site(CoreDataBits)
        case "L2" => site(TLDataBits)
      }
      //L1InstCache
      case NITLBEntries => 8
      case NBTBEntries => 62
      case NRAS => 2
      //L1DataCache
      case NDTLBEntries => 8
      case StoreDataQueueDepth => 17
      case ReplayQueueDepth => 16
      case NMSHRs => site[Int]("NMSHRS")
      case LRSCCycles => 32 
      //L2CacheParams
      case NReleaseTransactors => site[Int]("NL2_REL_XACTS")
      case NAcquireTransactors => site[Int]("NL2_ACQ_XACTS")
      case NClients => site(NTiles) + 1
      //Tile Constants
      case BuildRoCC => None
      case NDCachePorts => 2 + (if(site(BuildRoCC).isEmpty) 0 else 1) 
      case NTilePorts => 2 + (if(site(BuildRoCC).isEmpty) 0 else 1)
      case NPTWPorts => 2 + (if(site(BuildRoCC).isEmpty) 0 else 3)
      //Rocket Core Constants
      case RetireWidth => 1
      case UseVM => true
      case FastLoadWord => true
      case FastLoadByte => false
      case FastMulDiv => true
      case XprLen => 64
      case NMultXpr => 32
      case BuildFPU => Some(() => new FPU)
      case SFMALatency => 2
      case DFMALatency => 3
      case CoreInstBits => 32
      case CoreDataBits => site(XprLen)
      case CoreDCacheReqTagBits => 7 + log2Up(here(NDCachePorts))
      //HTIF Parameters
      case HTIFWidth => 16
      case HTIFNSCR => 64
      case HTIFOffsetBits => site(CacheBlockOffsetBits)
      case HTIFNCores => site(NTiles)
      //Memory Parameters
      case PAddrBits => 32
      case VAddrBits => 43
      case PgIdxBits => 13
      case ASIdBits => 7
      case PermBits => 6
      case PPNBits => site(PAddrBits) - site(PgIdxBits)
      case VPNBits => site(VAddrBits) - site(PgIdxBits)
      case MIFTagBits => 5
      case MIFDataBits => 128
      case MIFAddrBits => site(PAddrBits) - site(CacheBlockOffsetBits)
      case MIFDataBeats => 4
      //Uncore Paramters
      case LNMasters => site(NBanks)
      case LNClients => site(NTiles)+1
      case LNEndpoints => site(LNMasters) + site(LNClients)
      case TLCoherence => site(Coherence)
      case TLAddrBits => site(PAddrBits) - site(CacheBlockOffsetBits)
      case TLMasterXactIdBits => log2Up(site(NReleaseTransactors)+site(NAcquireTransactors))
      case TLClientXactIdBits => log2Up(site(NMSHRs))+log2Up(site(NTilePorts))
      case TLDataBits => site(CacheBlockBytes)*8
      case TLWriteMaskBits => 6
      case TLWordAddrBits  => 3
      case TLAtomicOpBits  => 4
      case NTiles => here[Int]("NTILES")
      case NBanks => here[Int]("NBANKS")
      case BankIdLSB => 5
      case CacheBlockBytes => 64
      case CacheBlockOffsetBits => log2Up(here(CacheBlockBytes))
      case BuildDRAMSideLLC => () => {
        val refill = site(TLDataBits)/site(MIFDataBits)
        if(site[Boolean]("USE_DRAMSIDE_LLC")) {
          val tag = Mem(Bits(width = 152), 512, seqRead = true)
          val data = Mem(Bits(width = 64), 4096, seqRead = true)
          Module(new DRAMSideLLC(sets=512, ways=8, outstanding=16, 
            refill_cycles=refill, tagLeaf=tag, dataLeaf=data))
        } else { Module(new DRAMSideLLCNull(16, refill)) }
      }
      case BuildCoherentMaster => (id: Int) => {
        if(!site[Boolean]("USE_DRAMSIDE_LLC")) { 
          Module(new L2CoherenceAgent(id), { case CacheName => "L2" })
        } else {
          Module(new L2HellaCache(id), { case CacheName => "L2" })
        }
      }
      case Coherence => {
        val dir = new FullRepresentation(site(NClients))
        val enSharing = site[Boolean]("ENABLE_SHARING")
        val enCleanEx = site[Boolean]("ENABLE_CLEAN_EXCLUSIVE")
        if(enSharing) {
          if(enCleanEx) new MESICoherence(dir)
          else new MSICoherence(dir)
        } else {
          if(enCleanEx) new MEICoherence(dir)
          else new MICoherence(dir)
        }
      }
      //DesignSpaceConstants  //TODO KNOBS
      case "NTILES" => 1
      case "NBANKS" => 1
      case "HTIF_WIDTH" => 16
      case "ENABLE_SHARING" => true
      case "ENABLE_CLEAN_EXCLUSIVE" => true
      case "USE_DRAMSIDE_LLC" => true
      case "NL2_REL_XACTS" => 1
      case "NL2_ACQ_XACTS" => 7
      case "NMSHRS" => 2
    }
  }
}