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

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package referencechip
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import Chisel._
import uncore._
import rocket._
import rocket.Util._
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import ReferenceChipBackend._
import scala.collection.mutable.ArrayBuffer
import scala.collection.mutable.HashMap
object DummyTopLevelConstants extends uncore.constants.CoherenceConfigConstants {
val NTILES = 2
val NBANKS = 1
val HTIF_WIDTH = 16
val ENABLE_SHARING = true
val ENABLE_CLEAN_EXCLUSIVE = true
val HAS_VEC = true
}
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object ReferenceChipBackend {
val initMap = new HashMap[Component, Bool]()
}
class ReferenceChipBackend extends VerilogBackend
{
override def emitPortDef(m: MemAccess, idx: Int) = {
val res = new StringBuilder()
for (node <- m.mem.inputs) {
if(node.name.contains("init"))
res.append(" .init(" + node.name + "),\n")
}
(if (idx == 0) res.toString else "") + super.emitPortDef(m, idx)
}
def addMemPin(c: Component) = {
for (node <- Component.nodes) {
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if (node.isInstanceOf[Mem[ _ ]] && node.component != null && node.asInstanceOf[Mem[_]].seqRead) {
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connectMemPin(c, node.component, node)
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}
}
}
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def connectMemPin(topC: Component, c: Component, p: Node): Unit = {
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var isNewPin = false
val compInitPin =
if (initMap.contains(c)) {
initMap(c)
} else {
isNewPin = true
Bool(INPUT)
}
p.inputs += compInitPin
if (isNewPin) {
compInitPin.setName("init")
c.io.asInstanceOf[Bundle] += compInitPin
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compInitPin.component = c
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initMap += (c -> compInitPin)
connectMemPin(topC, c.parent, compInitPin)
}
}
def addTopLevelPin(c: Component) = {
val init = Bool(INPUT)
init.setName("init")
init.component = c
c.io.asInstanceOf[Bundle] += init
initMap += (c -> init)
}
transforms += ((c: Component) => addTopLevelPin(c))
transforms += ((c: Component) => addMemPin(c))
}
class OuterMemorySystem(htif_width: Int, clientEndpoints: Seq[ClientCoherenceAgent])(implicit conf: UncoreConfiguration) extends Component
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{
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implicit val lnconf = conf.ln
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val io = new Bundle {
val tiles = Vec(conf.ln.nClients) { new TileLinkIO }.flip
val htif = (new TileLinkIO).flip
val incoherent = Vec(conf.ln.nClients) { Bool() }.asInput
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val mem_backup = new ioMemSerialized(htif_width)
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val mem_backup_en = Bool(INPUT)
val mem = new ioMem
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}
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val lnWithHtifConf = conf.ln.copy(nEndpoints = conf.ln.nEndpoints+1,
idBits = log2Up(conf.ln.nEndpoints+1)+1,
nClients = conf.ln.nClients+1)
val ucWithHtifConf = conf.copy(ln = lnWithHtifConf)
require(clientEndpoints.length == lnWithHtifConf.nClients)
val masterEndpoints = (0 until lnWithHtifConf.nMasters).map(new L2CoherenceAgent(_)(ucWithHtifConf))
val incoherentWithHtif = io.incoherent :+ Bool(true)
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val llc_tag_leaf = Mem(512, seqRead = true) { Bits(width = 152) }
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val llc_data_leaf = Mem(4096, seqRead = true) { Bits(width = 64) }
val llc = new DRAMSideLLC(512, 8, 4, llc_tag_leaf, llc_data_leaf)
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//val llc = new DRAMSideLLCNull(NGLOBAL_XACTS, REFILL_CYCLES)
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val mem_serdes = new MemSerdes(htif_width)
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val net = new ReferenceChipCrossbarNetwork(masterEndpoints++clientEndpoints)(ucWithHtifConf)
net.io zip (masterEndpoints.map(_.io.client) ++ io.tiles :+ io.htif) map { case (net, end) => net <> end }
masterEndpoints.map{ _.io.incoherent zip incoherentWithHtif map { case (m, c) => m := c } }
val conv = new MemIOUncachedTileLinkIOConverter(2)(ucWithHtifConf)
if(lnWithHtifConf.nMasters > 1) {
val arb = new UncachedTileLinkIOArbiterThatAppendsArbiterId(lnWithHtifConf.nMasters, conf.co)(lnWithHtifConf)
arb.io.in zip masterEndpoints.map(_.io.master) map { case (arb, cache) => arb <> cache }
conv.io.uncached <> arb.io.out
} else {
conv.io.uncached <> masterEndpoints.head.io.master
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}
llc.io.cpu.req_cmd <> Queue(conv.io.mem.req_cmd)
llc.io.cpu.req_data <> Queue(conv.io.mem.req_data, REFILL_CYCLES)
conv.io.mem.resp <> llc.io.cpu.resp
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// mux between main and backup memory ports
val mem_cmdq = (new Queue(2)) { new MemReqCmd }
mem_cmdq.io.enq <> llc.io.mem.req_cmd
mem_cmdq.io.deq.ready := Mux(io.mem_backup_en, mem_serdes.io.wide.req_cmd.ready, io.mem.req_cmd.ready)
io.mem.req_cmd.valid := mem_cmdq.io.deq.valid && !io.mem_backup_en
io.mem.req_cmd.bits := mem_cmdq.io.deq.bits
mem_serdes.io.wide.req_cmd.valid := mem_cmdq.io.deq.valid && io.mem_backup_en
mem_serdes.io.wide.req_cmd.bits := mem_cmdq.io.deq.bits
val mem_dataq = (new Queue(REFILL_CYCLES)) { new MemData }
mem_dataq.io.enq <> llc.io.mem.req_data
mem_dataq.io.deq.ready := Mux(io.mem_backup_en, mem_serdes.io.wide.req_data.ready, io.mem.req_data.ready)
io.mem.req_data.valid := mem_dataq.io.deq.valid && !io.mem_backup_en
io.mem.req_data.bits := mem_dataq.io.deq.bits
mem_serdes.io.wide.req_data.valid := mem_dataq.io.deq.valid && io.mem_backup_en
mem_serdes.io.wide.req_data.bits := mem_dataq.io.deq.bits
llc.io.mem.resp.valid := Mux(io.mem_backup_en, mem_serdes.io.wide.resp.valid, io.mem.resp.valid)
io.mem.resp.ready := Bool(true)
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llc.io.mem.resp.bits := Mux(io.mem_backup_en, mem_serdes.io.wide.resp.bits, io.mem.resp.bits)
io.mem_backup <> mem_serdes.io.narrow
}
class Uncore(htif_width: Int, tileList: Seq[ClientCoherenceAgent])(implicit conf: UncoreConfiguration) extends Component
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{
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implicit val lnconf = conf.ln
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val io = new Bundle {
val debug = new DebugIO()
val host = new HostIO(htif_width)
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val mem_backup = new ioMemSerialized(htif_width)
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val mem_backup_en = Bool(INPUT)
val mem = new ioMem
val tiles = Vec(conf.ln.nClients) { new TileLinkIO }.flip
val htif = Vec(conf.ln.nClients) { new HTIFIO(conf.ln.nClients) }.flip
val incoherent = Vec(conf.ln.nClients) { Bool() }.asInput
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}
val nBanks = 1
val bankIdLsb = 5
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val htif = new rocketHTIF(htif_width)
val outmemsys = new OuterMemorySystem(htif_width, tileList :+ htif)
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htif.io.cpu <> io.htif
outmemsys.io.incoherent <> io.incoherent
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io.mem <> outmemsys.io.mem
outmemsys.io.mem_backup_en <> io.mem_backup_en
// Add networking headers and endpoint queues
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def convertAddrToBank(addr: Bits): UFix = {
require(bankIdLsb + log2Up(nBanks) < PADDR_BITS - OFFSET_BITS, {println("Invalid bits for bank multiplexing.")})
addr(bankIdLsb + log2Up(nBanks) - 1, bankIdLsb)
}
(outmemsys.io.tiles :+ outmemsys.io.htif).zip(io.tiles :+ htif.io.mem).zipWithIndex.map {
case ((outer, client), i) =>
outer.acquire <> TileLinkHeaderAppender(client.acquire, i, nBanks, convertAddrToBank _)
outer.release <> TileLinkHeaderAppender(client.release, i, nBanks, convertAddrToBank _)
val grant_ack_q = Queue(client.grant_ack)
outer.grant_ack.valid := grant_ack_q.valid
outer.grant_ack.bits := grant_ack_q.bits
outer.grant_ack.bits.header.src := UFix(i)
grant_ack_q.ready := outer.grant_ack.ready
client.grant <> Queue(outer.grant, 1, pipe = true)
client.probe <> Queue(outer.probe)
}
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// pad out the HTIF using a divided clock
val hio = (new SlowIO(512)) { Bits(width = htif_width+1) }
hio.io.set_divisor.valid := htif.io.scr.wen && htif.io.scr.waddr === 63
hio.io.set_divisor.bits := htif.io.scr.wdata
htif.io.scr.rdata(63) := hio.io.divisor
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hio.io.out_fast.valid := htif.io.host.out.valid || outmemsys.io.mem_backup.req.valid
hio.io.out_fast.bits := Cat(htif.io.host.out.valid, Mux(htif.io.host.out.valid, htif.io.host.out.bits, outmemsys.io.mem_backup.req.bits))
htif.io.host.out.ready := hio.io.out_fast.ready
outmemsys.io.mem_backup.req.ready := hio.io.out_fast.ready && !htif.io.host.out.valid
io.host.out.valid := hio.io.out_slow.valid && hio.io.out_slow.bits(htif_width)
io.host.out.bits := hio.io.out_slow.bits
io.mem_backup.req.valid := hio.io.out_slow.valid && !hio.io.out_slow.bits(htif_width)
hio.io.out_slow.ready := Mux(hio.io.out_slow.bits(htif_width), io.host.out.ready, io.mem_backup.req.ready)
val mem_backup_resp_valid = io.mem_backup_en && io.mem_backup.resp.valid
hio.io.in_slow.valid := mem_backup_resp_valid || io.host.in.valid
hio.io.in_slow.bits := Cat(mem_backup_resp_valid, io.host.in.bits)
io.host.in.ready := hio.io.in_slow.ready
outmemsys.io.mem_backup.resp.valid := hio.io.in_fast.valid && hio.io.in_fast.bits(htif_width)
outmemsys.io.mem_backup.resp.bits := hio.io.in_fast.bits
htif.io.host.in.valid := hio.io.in_fast.valid && !hio.io.in_fast.bits(htif_width)
htif.io.host.in.bits := hio.io.in_fast.bits
hio.io.in_fast.ready := Mux(hio.io.in_fast.bits(htif_width), Bool(true), htif.io.host.in.ready)
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io.host.clk := hio.io.clk_slow
io.host.clk_edge := Reg(io.host.clk && !Reg(io.host.clk))
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}
class TopIO(htif_width: Int) extends Bundle {
val debug = new rocket.DebugIO
val host = new rocket.HostIO(htif_width);
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val mem_backup_en = Bool(INPUT)
val in_mem_ready = Bool(OUTPUT)
val in_mem_valid = Bool(INPUT)
val out_mem_ready = Bool(INPUT)
val out_mem_valid = Bool(OUTPUT)
val mem = new ioMem
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}
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import DummyTopLevelConstants._
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class MemDessert extends Component {
val io = new MemDesserIO(HTIF_WIDTH)
val x = new MemDesser(HTIF_WIDTH)
io.narrow <> x.io.narrow
io.wide <> x.io.wide
}
class Top extends Component {
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val co = if(ENABLE_SHARING) {
if(ENABLE_CLEAN_EXCLUSIVE) new MESICoherence
else new MSICoherence
} else {
if(ENABLE_CLEAN_EXCLUSIVE) new MEICoherence
else new MICoherence
}
implicit val lnConf = LogicalNetworkConfiguration(NTILES+NBANKS, log2Up(NTILES)+1, NBANKS, NTILES)
implicit val uConf = UncoreConfiguration(co, lnConf)
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val io = new TopIO(HTIF_WIDTH)
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val resetSigs = Vec(NTILES){ Bool() }
val ic = ICacheConfig(128, 2, co, ntlb = 8, nbtb = 16)
val dc = DCacheConfig(128, 4, co, ntlb = 8,
nmshr = 2, nrpq = 16, nsdq = 17)
val rc = RocketConfiguration(lnConf, co, ic, dc,
fpu = true, vec = HAS_VEC)
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val tileList = (0 until NTILES).map(r => new Tile(resetSignal = resetSigs(r))(rc))
val uncore = new Uncore(HTIF_WIDTH, tileList)
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var error_mode = Bool(false)
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for (i <- 0 until NTILES) {
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val hl = uncore.io.htif(i)
val tl = uncore.io.tiles(i)
val il = uncore.io.incoherent(i)
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resetSigs(i) := hl.reset
val tile = tileList(i)
tile.io.tilelink <> tl
il := hl.reset
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tile.io.host.reset := Reg(Reg(hl.reset))
tile.io.host.pcr_req <> Queue(hl.pcr_req)
hl.pcr_rep <> Queue(tile.io.host.pcr_rep)
hl.ipi_req <> Queue(tile.io.host.ipi_req)
tile.io.host.ipi_rep <> Queue(hl.ipi_rep)
error_mode = error_mode || Reg(tile.io.host.debug.error_mode)
}
io.host <> uncore.io.host
uncore.io.mem_backup.resp.valid := io.in_mem_valid
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io.out_mem_valid := uncore.io.mem_backup.req.valid
uncore.io.mem_backup.req.ready := io.out_mem_ready
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io.mem_backup_en <> uncore.io.mem_backup_en
io.mem <> uncore.io.mem
io.debug.error_mode := error_mode
}