574 lines
19 KiB
Scala
574 lines
19 KiB
Scala
// See LICENSE for license details.
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package uncore
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import Chisel._
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import scala.math.max
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// Parameters exposed to the top-level design, set based on
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// external requirements or design space exploration
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//
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case object TLId extends Field[String] // Unique name per network
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case object TLCoherence extends Field[CoherencePolicy]
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case object TLAddrBits extends Field[Int]
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case object TLManagerXactIdBits extends Field[Int]
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case object TLClientXactIdBits extends Field[Int]
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case object TLDataBits extends Field[Int]
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case object TLDataBeats extends Field[Int]
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abstract trait TileLinkParameters extends UsesParameters {
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val tlBlockAddrBits = params(TLAddrBits)
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val tlClientXactIdBits = params(TLClientXactIdBits)
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val tlManagerXactIdBits = params(TLManagerXactIdBits)
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val tlDataBits = params(TLDataBits)
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val tlDataBeats = params(TLDataBeats)
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val tlWriteMaskBits = if(tlDataBits/8 < 1) 1 else tlDataBits/8
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val tlBeatAddrBits = log2Up(tlDataBeats)
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val tlByteAddrBits = log2Up(tlWriteMaskBits)
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val tlAtomicOpcodeBits = M_SZ
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val tlUncachedOperandSizeBits = MT_SZ
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val tlSubblockUnionBits = max(tlWriteMaskBits,
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(tlByteAddrBits +
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tlUncachedOperandSizeBits +
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tlAtomicOpcodeBits)) + 1
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val co = params(TLCoherence)
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val networkPreservesPointToPointOrdering = false //TODO: check physical network type
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}
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abstract class TLBundle extends Bundle with TileLinkParameters
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abstract class TLModule extends Module with TileLinkParameters
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// Directionality of message channel
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// Used to hook up logical network ports to physical network ports
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trait TileLinkChannel extends TLBundle
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trait ClientToManagerChannel extends TileLinkChannel
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trait ManagerToClientChannel extends TileLinkChannel
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trait ClientToClientChannel extends TileLinkChannel // Unused for now
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// Common signals that are used in multiple channels.
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// These traits are useful for type parameterization.
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//
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trait HasCacheBlockAddress extends TLBundle {
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val addr_block = UInt(width = tlBlockAddrBits)
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}
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trait HasTileLinkBeatId extends TLBundle {
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val addr_beat = UInt(width = tlBeatAddrBits)
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}
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trait HasClientTransactionId extends TLBundle {
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val client_xact_id = Bits(width = tlClientXactIdBits)
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}
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trait HasManagerTransactionId extends TLBundle {
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val manager_xact_id = Bits(width = tlManagerXactIdBits)
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}
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abstract trait HasTileLinkData extends HasTileLinkBeatId {
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val data = UInt(width = tlDataBits)
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def hasData(dummy: Int = 0): Bool
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def hasMultibeatData(dummy: Int = 0): Bool
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}
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// Actual TileLink channel bundle definitions
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class Acquire extends ClientToManagerChannel
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with HasCacheBlockAddress
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with HasClientTransactionId
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with HasTileLinkData {
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// Actual bundle fields
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val uncached = Bool()
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val a_type = UInt(width = max(log2Up(Acquire.nBuiltinAcquireTypes), co.acquireTypeWidth))
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val subblock = Bits(width = tlSubblockUnionBits)
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// Utility funcs for accessing uncached/subblock union
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val opSizeOff = tlByteAddrBits + 1
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val opCodeOff = tlUncachedOperandSizeBits + opSizeOff
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val opMSB = tlAtomicOpcodeBits + opCodeOff
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def allocate(dummy: Int = 0) = subblock(0)
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def addr_byte(dummy: Int = 0) = subblock(opSizeOff-1, 1)
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def op_size(dummy: Int = 0) = subblock(opCodeOff-1, opSizeOff)
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def op_code(dummy: Int = 0) = subblock(opMSB-1, opCodeOff)
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def write_mask(dummy: Int = 0) = subblock(tlWriteMaskBits, 1)
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def addr(dummy: Int = 0) = Cat(addr_block, addr_beat, this.addr_byte(0))
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// Other helper funcs
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def is(t: UInt) = a_type === t
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def hasData(dummy: Int = 0): Bool = uncached && Acquire.typesWithData.contains(a_type)
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def hasMultibeatData(dummy: Int = 0): Bool = Bool(tlDataBeats > 1) && uncached &&
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Acquire.typesWithMultibeatData.contains(a_type)
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//TODO: This function is a hack to support Rocket icache snooping Rocket nbdcache:
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def requiresSelfProbe(dummy: Int = 0) = uncached && Acquire.requiresSelfProbe(a_type)
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def makeProbe(meta: ManagerMetadata = co.managerMetadataOnFlush): Probe =
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Probe(co.getProbeType(this, meta), this.addr_block)
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def makeGrant(
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manager_xact_id: UInt,
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meta: ManagerMetadata = co.managerMetadataOnFlush,
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addr_beat: UInt = UInt(0),
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data: UInt = UInt(0)): Grant = {
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Grant(
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uncached = this.uncached,
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g_type = co.getGrantType(this, meta),
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client_xact_id = this.client_xact_id,
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manager_xact_id = manager_xact_id,
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addr_beat = addr_beat,
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data = data
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)
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}
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}
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object Acquire {
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val nBuiltinAcquireTypes = 5
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//TODO: Use Enum
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def uncachedRead = UInt(0)
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def uncachedReadBlock = UInt(1)
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def uncachedWrite = UInt(2)
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def uncachedWriteBlock = UInt(3)
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def uncachedAtomic = UInt(4)
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def typesWithData = Vec(uncachedWrite, uncachedWriteBlock, uncachedAtomic)
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def typesWithMultibeatData = Vec(uncachedWriteBlock)
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def requiresOuterRead(a_type: UInt) = a_type != uncachedWriteBlock
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def requiresOuterWrite(a_type: UInt) = typesWithData.contains(a_type)
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//TODO: This function is a hack to support Rocket icache snooping Rocket nbdcache:
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def requiresSelfProbe(a_type: UInt) = a_type === uncachedReadBlock
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def fullWriteMask = SInt(-1, width = new Acquire().tlWriteMaskBits).toUInt
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// Most generic constructor
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def apply(
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uncached: Bool,
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a_type: Bits,
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client_xact_id: UInt,
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addr_block: UInt,
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addr_beat: UInt = UInt(0),
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data: UInt = UInt(0),
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subblock: UInt = UInt(0)): Acquire = {
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val acq = new Acquire
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acq.uncached := uncached
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acq.a_type := a_type
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acq.client_xact_id := client_xact_id
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acq.addr_block := addr_block
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acq.addr_beat := addr_beat
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acq.data := data
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acq.subblock := subblock
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acq
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}
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// For cached types
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def apply(a_type: Bits, client_xact_id: UInt, addr_block: UInt): Acquire = {
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apply(
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uncached = Bool(false),
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a_type = a_type,
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client_xact_id = client_xact_id,
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addr_block = addr_block)
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}
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// Copy constructor
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def apply(a: Acquire): Acquire = {
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val acq = new Acquire
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acq := a
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acq
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}
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}
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// Asks for a single TileLink beat of data
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object UncachedRead {
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def apply(
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client_xact_id: UInt,
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addr_block: UInt,
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addr_beat: UInt,
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alloc: Bool = Bool(true)): Acquire = {
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Acquire(
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uncached = Bool(true),
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a_type = Acquire.uncachedRead,
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client_xact_id = client_xact_id,
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addr_block = addr_block,
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addr_beat = addr_beat,
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subblock = alloc)
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}
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}
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// Asks for an entire cache block of data
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object UncachedReadBlock {
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def apply(
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client_xact_id: UInt = UInt(0),
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addr_block: UInt,
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alloc: Bool = Bool(true)): Acquire = {
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Acquire(
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uncached = Bool(true),
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a_type = Acquire.uncachedReadBlock,
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client_xact_id = client_xact_id,
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addr_block = addr_block,
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subblock = alloc.toUInt)
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}
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}
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object UncachedWrite {
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def apply(
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client_xact_id: UInt,
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addr_block: UInt,
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addr_beat: UInt,
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data: UInt,
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write_mask: UInt = Acquire.fullWriteMask,
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alloc: Bool = Bool(true)): Acquire = {
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Acquire(
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uncached = Bool(true),
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a_type = Acquire.uncachedWrite,
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addr_block = addr_block,
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addr_beat = addr_beat,
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client_xact_id = client_xact_id,
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data = data,
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subblock = Cat(write_mask, alloc))
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}
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}
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// For full block of data
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object UncachedWriteBlock {
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def apply(
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client_xact_id: UInt,
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addr_block: UInt,
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addr_beat: UInt,
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data: UInt,
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alloc: Bool = Bool(true)): Acquire = {
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Acquire(
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uncached = Bool(true),
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a_type = Acquire.uncachedWriteBlock,
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client_xact_id = client_xact_id,
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addr_block = addr_block,
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addr_beat = addr_beat,
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data = data,
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subblock = Cat(Acquire.fullWriteMask, alloc))
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}
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}
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object UncachedAtomic {
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def apply(
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client_xact_id: UInt,
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addr_block: UInt,
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addr_beat: UInt,
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addr_byte: UInt,
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atomic_opcode: UInt,
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operand_size: UInt,
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data: UInt): Acquire = {
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Acquire(
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uncached = Bool(true),
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a_type = Acquire.uncachedAtomic,
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client_xact_id = client_xact_id,
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addr_block = addr_block,
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addr_beat = addr_beat,
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data = data,
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subblock = Cat(atomic_opcode, operand_size, addr_byte, Bool(true)))
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}
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}
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class Probe extends ManagerToClientChannel
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with HasCacheBlockAddress {
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val p_type = UInt(width = co.probeTypeWidth)
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def is(t: UInt) = p_type === t
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def makeRelease(
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client_xact_id: UInt,
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meta: ClientMetadata = co.clientMetadataOnFlush,
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addr_beat: UInt = UInt(0),
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data: UInt = UInt(0)): Release = {
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Release(
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voluntary = Bool(false),
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r_type = co.getReleaseType(this, meta),
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client_xact_id = client_xact_id,
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addr_block = this.addr_block,
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addr_beat = addr_beat,
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data = data)
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}
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}
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object Probe {
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val co = new Probe().co
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def apply(p_type: UInt, addr_block: UInt) = {
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val prb = new Probe
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prb.p_type := p_type
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prb.addr_block := addr_block
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prb
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}
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def onVoluntaryWriteback(meta: ManagerMetadata, addr_block: UInt): Probe = {
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apply(co.getProbeType(M_FLUSH, meta), addr_block)
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}
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}
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class Release extends ClientToManagerChannel
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with HasCacheBlockAddress
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with HasClientTransactionId
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with HasTileLinkData {
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val r_type = UInt(width = co.releaseTypeWidth)
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val voluntary = Bool()
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// Helper funcs
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def is(t: UInt) = r_type === t
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def hasData(dummy: Int = 0) = co.releaseTypesWithData.contains(r_type)
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def hasMultibeatData(dummy: Int = 0) = Bool(tlDataBeats > 1) && co.releaseTypesWithData.contains(r_type)
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def isVoluntary(dummy: Int = 0) = voluntary
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def requiresAck(dummy: Int = 0) = !Bool(networkPreservesPointToPointOrdering)
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def makeGrant(
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manager_xact_id: UInt,
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meta: ManagerMetadata = co.managerMetadataOnFlush): Grant = {
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Grant(
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g_type = Grant.voluntaryAck,
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uncached = Bool(true), // Grant.voluntaryAck is built-in type
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client_xact_id = this.client_xact_id,
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manager_xact_id = manager_xact_id
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)
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}
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}
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object Release {
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val co = new Release().co
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def apply(
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voluntary: Bool,
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r_type: UInt,
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client_xact_id: UInt,
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addr_block: UInt,
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addr_beat: UInt = UInt(0),
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data: UInt = UInt(0)): Release = {
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val rel = new Release
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rel.r_type := r_type
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rel.client_xact_id := client_xact_id
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rel.addr_block := addr_block
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rel.addr_beat := addr_beat
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rel.data := data
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rel.voluntary := voluntary
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rel
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}
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def makeVoluntaryWriteback(
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meta: ClientMetadata,
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client_xact_id: UInt,
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addr_block: UInt,
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addr_beat: UInt = UInt(0),
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data: UInt = UInt(0)): Release = {
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Release(
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voluntary = Bool(true),
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r_type = co.getReleaseType(M_FLUSH, meta),
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client_xact_id = client_xact_id,
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addr_block = addr_block,
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addr_beat = addr_beat,
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data = data)
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}
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}
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class Grant extends ManagerToClientChannel
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with HasTileLinkData
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with HasClientTransactionId
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with HasManagerTransactionId {
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val uncached = Bool()
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val g_type = UInt(width = max(log2Up(Grant.nBuiltinGrantTypes), co.grantTypeWidth))
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// Helper funcs
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def is(t: UInt) = g_type === t
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def hasData(dummy: Int = 0): Bool = Mux(uncached,
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Grant.typesWithData.contains(g_type),
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co.grantTypesWithData.contains(g_type))
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def hasMultibeatData(dummy: Int = 0): Bool =
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Bool(tlDataBeats > 1) && Mux(uncached,
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Grant.typesWithMultibeatData.contains(g_type),
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co.grantTypesWithData.contains(g_type))
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def isVoluntary(dummy: Int = 0): Bool = uncached && (g_type === Grant.voluntaryAck)
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def requiresAck(dummy: Int = 0): Bool = !Bool(networkPreservesPointToPointOrdering) && !isVoluntary()
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def makeFinish(dummy: Int = 0): Finish = {
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val f = new Finish
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f.manager_xact_id := this.manager_xact_id
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f
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}
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}
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object Grant {
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val nBuiltinGrantTypes = 5
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//TODO Use Enum
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def voluntaryAck = UInt(0)
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def uncachedRead = UInt(1)
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def uncachedReadBlock = UInt(2)
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def uncachedWrite = UInt(3)
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def uncachedAtomic = UInt(4)
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def typesWithData = Vec(uncachedRead, uncachedReadBlock, uncachedAtomic)
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def typesWithMultibeatData= Vec(uncachedReadBlock)
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def apply(
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uncached: Bool,
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g_type: UInt,
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client_xact_id: UInt,
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manager_xact_id: UInt,
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addr_beat: UInt = UInt(0),
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data: UInt = UInt(0)): Grant = {
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val gnt = new Grant
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gnt.uncached := uncached
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gnt.g_type := g_type
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gnt.client_xact_id := client_xact_id
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gnt.manager_xact_id := manager_xact_id
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gnt.addr_beat := addr_beat
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gnt.data := data
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gnt
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}
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def getGrantTypeForUncached(a: Acquire): UInt = {
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MuxLookup(a.a_type, Grant.uncachedRead, Array(
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Acquire.uncachedRead -> Grant.uncachedRead,
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Acquire.uncachedReadBlock -> Grant.uncachedReadBlock,
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Acquire.uncachedWrite -> Grant.uncachedWrite,
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Acquire.uncachedWriteBlock -> Grant.uncachedWrite,
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Acquire.uncachedAtomic -> Grant.uncachedAtomic
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))
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}
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}
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class Finish extends ClientToManagerChannel with HasManagerTransactionId
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// Complete IO definitions for two types of TileLink clients
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class UncachedTileLinkIO extends Bundle {
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val acquire = new DecoupledIO(new LogicalNetworkIO(new Acquire))
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val grant = new DecoupledIO(new LogicalNetworkIO(new Grant)).flip
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val finish = new DecoupledIO(new LogicalNetworkIO(new Finish))
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}
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class TileLinkIO extends UncachedTileLinkIO {
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val probe = new DecoupledIO(new LogicalNetworkIO(new Probe)).flip
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val release = new DecoupledIO(new LogicalNetworkIO(new Release))
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}
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// Converts UncachedTileLinkIO to regular TileLinkIO by pinning
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// probe.ready and release.valid low
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class TileLinkIOWrapper extends TLModule {
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val io = new Bundle {
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val in = new UncachedTileLinkIO().flip
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val out = new TileLinkIO
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}
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io.out.acquire <> io.in.acquire
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io.out.grant <> io.in.grant
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io.out.finish <> io.in.finish
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io.out.probe.ready := Bool(false)
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io.out.release.valid := Bool(false)
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}
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object TileLinkIOWrapper {
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def apply[T <: Data](uncached: UncachedTileLinkIO) = {
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val conv = Module(new TileLinkIOWrapper)
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conv.io.in <> uncached
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conv.io.out
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}
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}
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abstract trait HasArbiterTypes {
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val arbN: Int
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type ManagerSourcedWithId = ManagerToClientChannel with HasClientTransactionId
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type ClientSourcedWithId = ClientToManagerChannel with HasClientTransactionId
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type ClientSourcedWithIdAndData = ClientToManagerChannel with
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HasClientTransactionId with
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HasTileLinkData
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}
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// Utility functions for constructing TileLinkIO arbiters
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abstract class TileLinkArbiterLike(val arbN: Int) extends TLModule
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with HasArbiterTypes {
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// These are filled in depending on whether the arbiter mucks with the
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// client ids and then needs to revert them on the way back
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def clientSourcedClientXactId(in: ClientSourcedWithId, id: Int): Bits
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def managerSourcedClientXactId(in: ManagerSourcedWithId): Bits
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def arbIdx(in: ManagerSourcedWithId): UInt
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def hookupClientSource[M <: ClientSourcedWithIdAndData]
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(ins: Seq[DecoupledIO[LogicalNetworkIO[M]]],
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out: DecoupledIO[LogicalNetworkIO[M]]) {
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def hasData(m: LogicalNetworkIO[M]) = m.payload.hasMultibeatData()
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val arb = Module(new LockingRRArbiter(out.bits.clone, arbN, params(TLDataBeats), Some(hasData _)))
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out <> arb.io.out
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ins.zipWithIndex.zip(arb.io.in).map{ case ((req,id), arb) => {
|
|
arb.valid := req.valid
|
|
arb.bits := req.bits
|
|
arb.bits.payload.client_xact_id := clientSourcedClientXactId(req.bits.payload, id)
|
|
req.ready := arb.ready
|
|
}}
|
|
}
|
|
|
|
def hookupManagerSource[M <: ManagerSourcedWithId]
|
|
(ins: Seq[DecoupledIO[LogicalNetworkIO[M]]],
|
|
out: DecoupledIO[LogicalNetworkIO[M]]) {
|
|
out.ready := Bool(false)
|
|
for (i <- 0 until arbN) {
|
|
ins(i).valid := Bool(false)
|
|
when (arbIdx(out.bits.payload) === UInt(i)) {
|
|
ins(i).valid := out.valid
|
|
out.ready := ins(i).ready
|
|
}
|
|
ins(i).bits := out.bits
|
|
ins(i).bits.payload.client_xact_id := managerSourcedClientXactId(out.bits.payload)
|
|
}
|
|
}
|
|
}
|
|
|
|
abstract class UncachedTileLinkIOArbiter(n: Int)
|
|
extends TileLinkArbiterLike(n) {
|
|
val io = new Bundle {
|
|
val in = Vec.fill(n){new UncachedTileLinkIO}.flip
|
|
val out = new UncachedTileLinkIO
|
|
}
|
|
|
|
hookupClientSource(io.in.map(_.acquire), io.out.acquire)
|
|
hookupManagerSource(io.in.map(_.grant), io.out.grant)
|
|
|
|
val finish_arb = Module(new RRArbiter(new LogicalNetworkIO(new Finish), n))
|
|
io.out.finish <> finish_arb.io.out
|
|
finish_arb.io.in zip io.in map { case (arb, req) => arb <> req.finish }
|
|
}
|
|
|
|
abstract class TileLinkIOArbiter(n: Int) extends TileLinkArbiterLike(n) {
|
|
val io = new Bundle {
|
|
val in = Vec.fill(n){new TileLinkIO}.flip
|
|
val out = new TileLinkIO
|
|
}
|
|
|
|
hookupClientSource(io.in.map(_.acquire), io.out.acquire)
|
|
hookupClientSource(io.in.map(_.release), io.out.release)
|
|
hookupManagerSource(io.in.map(_.grant), io.out.grant)
|
|
|
|
io.in.map{ _.probe.valid := io.out.probe.valid }
|
|
io.in.map{ _.probe.bits := io.out.probe.bits }
|
|
io.out.probe.ready := io.in.map(_.probe.ready).reduce(_||_)
|
|
|
|
val finish_arb = Module(new RRArbiter(new LogicalNetworkIO(new Finish), n))
|
|
io.out.finish <> finish_arb.io.out
|
|
finish_arb.io.in zip io.in map { case (arb, req) => arb <> req.finish }
|
|
}
|
|
|
|
// Appends the port index of the arbiter to the client_xact_id
|
|
abstract trait AppendsArbiterId extends HasArbiterTypes {
|
|
def clientSourcedClientXactId(in: ClientSourcedWithId, id: Int) =
|
|
Cat(in.client_xact_id, UInt(id, log2Up(arbN)))
|
|
def managerSourcedClientXactId(in: ManagerSourcedWithId) =
|
|
in.client_xact_id >> UInt(log2Up(arbN))
|
|
def arbIdx(in: ManagerSourcedWithId) = in.client_xact_id(log2Up(arbN)-1,0).toUInt
|
|
}
|
|
|
|
// Uses the client_xact_id as is (assumes it has been set to port index)
|
|
abstract trait PassesId extends HasArbiterTypes {
|
|
def clientSourcedClientXactId(in: ClientSourcedWithId, id: Int) = in.client_xact_id
|
|
def managerSourcedClientXactId(in: ManagerSourcedWithId) = in.client_xact_id
|
|
def arbIdx(in: ManagerSourcedWithId) = in.client_xact_id
|
|
}
|
|
|
|
// Overwrites some default client_xact_id with the port idx
|
|
abstract trait UsesNewId extends HasArbiterTypes {
|
|
def clientSourcedClientXactId(in: ClientSourcedWithId, id: Int) = UInt(id, log2Up(arbN))
|
|
def managerSourcedClientXactId(in: ManagerSourcedWithId) = UInt(0)
|
|
def arbIdx(in: ManagerSourcedWithId) = in.client_xact_id
|
|
}
|
|
|
|
// Mix-in id generation traits to make concrete arbiter classes
|
|
class UncachedTileLinkIOArbiterThatAppendsArbiterId(val n: Int) extends UncachedTileLinkIOArbiter(n) with AppendsArbiterId
|
|
class UncachedTileLinkIOArbiterThatPassesId(val n: Int) extends UncachedTileLinkIOArbiter(n) with PassesId
|
|
class UncachedTileLinkIOArbiterThatUsesNewId(val n: Int) extends UncachedTileLinkIOArbiter(n) with UsesNewId
|
|
class TileLinkIOArbiterThatAppendsArbiterId(val n: Int) extends TileLinkIOArbiter(n) with AppendsArbiterId
|
|
class TileLinkIOArbiterThatPassesId(val n: Int) extends TileLinkIOArbiter(n) with PassesId
|
|
class TileLinkIOArbiterThatUsesNewId(val n: Int) extends TileLinkIOArbiter(n) with UsesNewId
|