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uncore and rocket changes for new xact types

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This commit is contained in:
Henry Cook 2012-09-27 16:46:36 -07:00
parent d9cb96c0ae
commit b9a9664de5
6 changed files with 165 additions and 72 deletions
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194
rocket/src/main/scala/coherence.scala
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@ -3,10 +3,39 @@ package rocket
import Chisel._
import Constants._
class TransactionInit extends Bundle {
object TransactionInit
{
def apply(x_type: Bits, addr: UFix, tile_xact_id: UFix) = {
val init = new TransactionInit
init.x_type := x_type
init.addr := addr
init.tile_xact_id := tile_xact_id
init
}
def apply(x_type: Bits, addr: UFix, tile_xact_id: UFix, write_mask: Bits) = {
val init = new TransactionInit
init.x_type := x_type
init.addr := addr
init.tile_xact_id := tile_xact_id
init.write_mask := write_mask
init
}
def apply(x_type: Bits, addr: UFix, tile_xact_id: UFix, subword_addr: UFix, atomic_opcode: UFix) = {
val init = new TransactionInit
init.x_type := x_type
init.addr := addr
init.tile_xact_id := tile_xact_id
init.subword_addr := subword_addr
init.atomic_opcode := atomic_opcode
init
}
}
class TransactionInit extends PhysicalAddress {
val x_type = Bits(width = X_INIT_TYPE_MAX_BITS)
val tile_xact_id = Bits(width = TILE_XACT_ID_BITS)
val address = UFix(width = PADDR_BITS - OFFSET_BITS)
val write_mask = Bits(width = X_INIT_WRITE_MASK_BITS)
val subword_addr = Bits(width = X_INIT_SUBWORD_ADDR_BITS)
val atomic_opcode = Bits(width = X_INIT_ATOMIC_OP_BITS)
}
class TransactionInitData extends MemData
@ -15,10 +44,9 @@ class TransactionAbort extends Bundle {
val tile_xact_id = Bits(width = TILE_XACT_ID_BITS)
}
class ProbeRequest extends Bundle {
class ProbeRequest extends PhysicalAddress {
val p_type = Bits(width = P_REQ_TYPE_MAX_BITS)
val global_xact_id = Bits(width = GLOBAL_XACT_ID_BITS)
val address = Bits(width = PADDR_BITS - OFFSET_BITS)
}
class ProbeReply extends Bundle {
@ -76,6 +104,7 @@ abstract class CoherencePolicy {
def messageHasData (init: TransactionInit): Bool
def messageHasData (reply: TransactionReply): Bool
def messageUpdatesDataArray (reply: TransactionReply): Bool
def messageIsUncached(init: TransactionInit): Bool
def isCoherenceConflict(addr1: Bits, addr2: Bits): Bool
def getTransactionReplyType(x_type: UFix, count: UFix): Bits
@ -86,8 +115,11 @@ abstract class CoherencePolicy {
}
trait UncachedTransactions {
def getTransactionInitTypeOnUncachedRead(): UFix
def getTransactionInitTypeOnUncachedWrite(): UFix
def getUncachedReadTransactionInit(addr: UFix, id: UFix): TransactionInit
def getUncachedWriteTransactionInit(addr: UFix, id: UFix): TransactionInit
def getUncachedReadWordTransactionInit(addr: UFix, id: UFix): TransactionInit
def getUncachedWriteWordTransactionInit(addr: UFix, id: UFix, write_mask: Bits): TransactionInit
def getUncachedAtomicTransactionInit(addr: UFix, id: UFix, subword_addr: UFix, atomic_op: UFix): TransactionInit
}
abstract class CoherencePolicyWithUncached extends CoherencePolicy with UncachedTransactions
@ -115,6 +147,8 @@ class ThreeStateIncoherence extends IncoherentPolicy {
val xactInitReadClean :: xactInitReadDirty :: xactInitWriteback :: Nil = Enum(3){ UFix() }
val xactReplyData :: xactReplyAck :: Nil = Enum(2){ UFix() }
val probeRepInvalidateAck :: Nil = Enum(1){ UFix() }
val uncachedTypeList = List()
val hasDataTypeList = List(xactInitWriteback)
def isHit ( cmd: Bits, state: UFix): Bool = (state === tileClean || state === tileDirty)
def isValid (state: UFix): Bool = state != tileInvalid
@ -149,9 +183,10 @@ class ThreeStateIncoherence extends IncoherentPolicy {
def getTransactionInitTypeOnCacheControl(cmd: Bits): Bits = xactInitWriteback //TODO
def getTransactionInitTypeOnWriteback(): Bits = xactInitWriteback
def messageHasData (init: TransactionInit): Bool = (init.x_type === xactInitWriteback)
def messageHasData (init: TransactionInit): Bool = hasDataTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def messageHasData (reply: TransactionReply) = (reply.x_type === xactReplyData)
def messageUpdatesDataArray (reply: TransactionReply) = (reply.x_type === xactReplyData)
def messageIsUncached(init: TransactionInit): Bool = uncachedTypeList.map(t => init.x_type === t).reduceLeft(_||_)
}
class MICoherence extends CoherencePolicyWithUncached {
@ -159,10 +194,12 @@ class MICoherence extends CoherencePolicyWithUncached {
val tileInvalid :: tileValid :: Nil = Enum(2){ UFix() }
val globalInvalid :: globalValid :: Nil = Enum(2){ UFix() }
val xactInitReadExclusive :: xactInitReadUncached :: xactInitWriteUncached :: Nil = Enum(3){ UFix() }
val xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: Nil = Enum(3){ UFix() }
val xactInitReadExclusive :: xactInitReadUncached :: xactInitWriteUncached :: xactInitReadWordUncached :: xactInitWriteWordUncached :: xactInitAtomicUncached :: Nil = Enum(6){ UFix() }
val xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: xactReplyReadWordUncached :: xactReplyWriteWordUncached :: xactReplyAtomicUncached :: Nil = Enum(6){ UFix() }
val probeReqInvalidate :: probeReqCopy :: Nil = Enum(2){ UFix() }
val probeRepInvalidateData :: probeRepCopyData :: probeRepInvalidateAck :: probeRepCopyAck :: Nil = Enum(4){ UFix() }
val uncachedTypeList = List(xactInitReadUncached, xactInitWriteUncached, xactReplyReadWordUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
val hasDataTypeList = List(xactInitWriteUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
def isHit (cmd: Bits, state: UFix): Bool = state != tileInvalid
def isValid (state: UFix): Bool = state != tileInvalid
@ -191,7 +228,10 @@ class MICoherence extends CoherencePolicyWithUncached {
MuxLookup(incoming.x_type, tileInvalid, Array(
xactReplyReadExclusive -> tileValid,
xactReplyReadUncached -> tileInvalid,
xactReplyWriteUncached -> tileInvalid
xactReplyWriteUncached -> tileInvalid,
xactReplyReadWordUncached -> tileInvalid,
xactReplyWriteWordUncached -> tileInvalid,
xactReplyAtomicUncached -> tileInvalid
))
}
def newStateOnProbeRequest(incoming: ProbeRequest, state: UFix): Bits = {
@ -201,8 +241,12 @@ class MICoherence extends CoherencePolicyWithUncached {
))
}
def getTransactionInitTypeOnUncachedRead() = xactInitReadUncached
def getTransactionInitTypeOnUncachedWrite() = xactInitWriteUncached
def getUncachedReadTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadUncached, addr, id)
def getUncachedWriteTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitWriteUncached, addr, id)
def getUncachedReadWordTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadWordUncached, addr, id)
def getUncachedWriteWordTransactionInit(addr: UFix, id: UFix, write_mask: Bits) = TransactionInit(xactInitWriteWordUncached, addr, id, write_mask)
def getUncachedAtomicTransactionInit(addr: UFix, id: UFix, subword_addr: UFix, atomic_op: UFix) = TransactionInit(xactInitAtomicUncached, addr, id, subword_addr, atomic_op)
def getTransactionInitTypeOnPrimaryMiss(cmd: Bits, state: UFix): UFix = xactInitReadExclusive
def getTransactionInitTypeOnSecondaryMiss(cmd: Bits, state: UFix, outstanding: TransactionInit): UFix = xactInitReadExclusive
def getTransactionInitTypeOnCacheControl(cmd: Bits): Bits = xactInitWriteUncached
@ -227,15 +271,14 @@ class MICoherence extends CoherencePolicyWithUncached {
(reply.p_type === probeRepInvalidateData ||
reply.p_type === probeRepCopyData)
}
def messageHasData (init: TransactionInit): Bool = {
(init.x_type === xactInitWriteUncached)
}
def messageHasData (init: TransactionInit): Bool = hasDataTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def messageHasData (reply: TransactionReply): Bool = {
(reply.x_type != xactReplyWriteUncached)
(reply.x_type != xactReplyWriteUncached && reply.x_type != xactReplyWriteWordUncached)
}
def messageUpdatesDataArray (reply: TransactionReply): Bool = {
(reply.x_type === xactReplyReadExclusive)
}
def messageIsUncached(init: TransactionInit): Bool = uncachedTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def isCoherenceConflict(addr1: Bits, addr2: Bits): Bool = (addr1 === addr2)
@ -243,7 +286,10 @@ class MICoherence extends CoherencePolicyWithUncached {
MuxLookup(x_type, xactReplyReadUncached, Array(
xactInitReadExclusive -> xactReplyReadExclusive,
xactInitReadUncached -> xactReplyReadUncached,
xactInitWriteUncached -> xactReplyWriteUncached
xactInitWriteUncached -> xactReplyWriteUncached,
xactInitReadWordUncached -> xactReplyReadWordUncached,
xactInitWriteWordUncached -> xactReplyWriteWordUncached,
xactInitAtomicUncached -> xactReplyAtomicUncached
))
}
@ -251,7 +297,10 @@ class MICoherence extends CoherencePolicyWithUncached {
MuxLookup(x_type, probeReqCopy, Array(
xactInitReadExclusive -> probeReqInvalidate,
xactInitReadUncached -> probeReqCopy,
xactInitWriteUncached -> probeReqInvalidate
xactInitWriteUncached -> probeReqInvalidate,
xactInitReadWordUncached -> probeReqCopy,
xactInitWriteWordUncached -> probeReqInvalidate,
xactInitAtomicUncached -> probeReqInvalidate
))
}
@ -271,17 +320,19 @@ class MEICoherence extends CoherencePolicyWithUncached {
val tileInvalid :: tileExclusiveClean :: tileExclusiveDirty :: Nil = Enum(3){ UFix() }
val globalInvalid :: globalExclusiveClean :: Nil = Enum(2){ UFix() }
val xactInitReadExclusiveClean :: xactInitReadExclusiveDirty :: xactInitReadUncached :: xactInitWriteUncached :: Nil = Enum(4){ UFix() }
val xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: xactReplyReadExclusiveAck :: Nil = Enum(4){ UFix() }
val xactInitReadExclusiveClean :: xactInitReadExclusiveDirty :: xactInitReadUncached :: xactInitWriteUncached :: xactInitReadWordUncached :: xactInitWriteWordUncached :: xactInitAtomicUncached :: Nil = Enum(7){ UFix() }
val xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: xactReplyReadExclusiveAck :: xactReplyReadWordUncached :: xactReplyWriteWordUncached :: xactReplyAtomicUncached :: Nil = Enum(7){ UFix() }
val probeReqInvalidate :: probeReqDowngrade :: probeReqCopy :: Nil = Enum(3){ UFix() }
val probeRepInvalidateData :: probeRepDowngradeData :: probeRepCopyData :: probeRepInvalidateAck :: probeRepDowngradeAck :: probeRepCopyAck :: Nil = Enum(6){ UFix() }
val uncachedTypeList = List(xactInitReadUncached, xactInitWriteUncached, xactReplyReadWordUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
val hasDataTypeList = List(xactInitWriteUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
def isHit (cmd: Bits, state: UFix): Bool = state != tileInvalid
def isValid (state: UFix): Bool = state != tileInvalid
def needsTransactionOnSecondaryMiss(cmd: Bits, outstanding: TransactionInit): Bool = {
val (read, write) = cpuCmdToRW(cmd)
(read && (outstanding.x_type === xactInitReadUncached || outstanding.x_type === xactInitWriteUncached)) ||
(read && messageIsUncached(outstanding)) ||
(write && (outstanding.x_type != xactInitReadExclusiveDirty))
}
def needsTransactionOnCacheControl(cmd: Bits, state: UFix): Bool = {
@ -311,7 +362,10 @@ class MEICoherence extends CoherencePolicyWithUncached {
xactReplyReadExclusive -> Mux(outstanding.x_type === xactInitReadExclusiveDirty, tileExclusiveDirty, tileExclusiveClean),
xactReplyReadExclusiveAck -> tileExclusiveDirty,
xactReplyReadUncached -> tileInvalid,
xactReplyWriteUncached -> tileInvalid
xactReplyWriteUncached -> tileInvalid,
xactReplyReadWordUncached -> tileInvalid,
xactReplyWriteWordUncached -> tileInvalid,
xactReplyAtomicUncached -> tileInvalid
))
}
def newStateOnProbeRequest(incoming: ProbeRequest, state: UFix): Bits = {
@ -322,8 +376,12 @@ class MEICoherence extends CoherencePolicyWithUncached {
))
}
def getTransactionInitTypeOnUncachedRead() = xactInitReadUncached
def getTransactionInitTypeOnUncachedWrite() = xactInitWriteUncached
def getUncachedReadTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadUncached, addr, id)
def getUncachedWriteTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitWriteUncached, addr, id)
def getUncachedReadWordTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadWordUncached, addr, id)
def getUncachedWriteWordTransactionInit(addr: UFix, id: UFix, write_mask: Bits) = TransactionInit(xactInitWriteWordUncached, addr, id, write_mask)
def getUncachedAtomicTransactionInit(addr: UFix, id: UFix, subword_addr: UFix, atomic_op: UFix) = TransactionInit(xactInitAtomicUncached, addr, id, subword_addr, atomic_op)
def getTransactionInitTypeOnPrimaryMiss(cmd: Bits, state: UFix): UFix = {
val (read, write) = cpuCmdToRW(cmd)
Mux(write, xactInitReadExclusiveDirty, xactInitReadExclusiveClean)
@ -357,15 +415,14 @@ class MEICoherence extends CoherencePolicyWithUncached {
reply.p_type === probeRepDowngradeData ||
reply.p_type === probeRepCopyData)
}
def messageHasData (init: TransactionInit): Bool = {
(init.x_type === xactInitWriteUncached)
}
def messageHasData (init: TransactionInit): Bool = hasDataTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def messageHasData (reply: TransactionReply): Bool = {
(reply.x_type != xactReplyWriteUncached && reply.x_type != xactReplyReadExclusiveAck)
(reply.x_type != xactReplyWriteUncached && reply.x_type != xactReplyReadExclusiveAck && reply.x_type != xactReplyWriteWordUncached)
}
def messageUpdatesDataArray (reply: TransactionReply): Bool = {
(reply.x_type === xactReplyReadExclusive)
}
def messageIsUncached(init: TransactionInit): Bool = uncachedTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def isCoherenceConflict(addr1: Bits, addr2: Bits): Bool = (addr1 === addr2)
@ -374,7 +431,10 @@ class MEICoherence extends CoherencePolicyWithUncached {
xactInitReadExclusiveClean -> xactReplyReadExclusive,
xactInitReadExclusiveDirty -> xactReplyReadExclusive,
xactInitReadUncached -> xactReplyReadUncached,
xactInitWriteUncached -> xactReplyWriteUncached
xactInitWriteUncached -> xactReplyWriteUncached,
xactInitReadWordUncached -> xactReplyReadWordUncached,
xactInitWriteWordUncached -> xactReplyWriteWordUncached,
xactInitAtomicUncached -> xactReplyAtomicUncached
))
}
@ -383,7 +443,10 @@ class MEICoherence extends CoherencePolicyWithUncached {
xactInitReadExclusiveClean -> probeReqInvalidate,
xactInitReadExclusiveDirty -> probeReqInvalidate,
xactInitReadUncached -> probeReqCopy,
xactInitWriteUncached -> probeReqInvalidate
xactInitWriteUncached -> probeReqInvalidate,
xactInitReadWordUncached -> probeReqCopy,
xactInitWriteWordUncached -> probeReqInvalidate,
xactInitAtomicUncached -> probeReqInvalidate
))
}
@ -403,10 +466,12 @@ class MSICoherence extends CoherencePolicyWithUncached {
val tileInvalid :: tileShared :: tileExclusiveDirty :: Nil = Enum(3){ UFix() }
val globalInvalid :: globalShared :: globalExclusive :: Nil = Enum(3){ UFix() }
val xactInitReadShared :: xactInitReadExclusive :: xactInitReadUncached :: xactInitWriteUncached :: Nil = Enum(4){ UFix() }
val xactReplyReadShared :: xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: xactReplyReadExclusiveAck :: Nil = Enum(5){ UFix() }
val xactInitReadShared :: xactInitReadExclusive :: xactInitReadUncached :: xactInitWriteUncached :: xactInitReadWordUncached :: xactInitWriteWordUncached :: xactInitAtomicUncached :: Nil = Enum(7){ UFix() }
val xactReplyReadShared :: xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: xactReplyReadExclusiveAck :: xactReplyReadWordUncached :: xactReplyWriteWordUncached :: xactReplyAtomicUncached :: Nil = Enum(8){ UFix() }
val probeReqInvalidate :: probeReqDowngrade :: probeReqCopy :: Nil = Enum(3){ UFix() }
val probeRepInvalidateData :: probeRepDowngradeData :: probeRepCopyData :: probeRepInvalidateAck :: probeRepDowngradeAck :: probeRepCopyAck :: Nil = Enum(6){ UFix() }
val uncachedTypeList = List(xactInitReadUncached, xactInitWriteUncached, xactReplyReadWordUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
val hasDataTypeList = List(xactInitWriteUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
def isHit (cmd: Bits, state: UFix): Bool = {
val (read, write) = cpuCmdToRW(cmd)
@ -419,7 +484,7 @@ class MSICoherence extends CoherencePolicyWithUncached {
def needsTransactionOnSecondaryMiss(cmd: Bits, outstanding: TransactionInit): Bool = {
val (read, write) = cpuCmdToRW(cmd)
(read && (outstanding.x_type === xactInitReadUncached || outstanding.x_type === xactInitWriteUncached)) ||
(read && messageIsUncached(outstanding)) ||
(write && (outstanding.x_type != xactInitReadExclusive))
}
def needsTransactionOnCacheControl(cmd: Bits, state: UFix): Bool = {
@ -450,7 +515,10 @@ class MSICoherence extends CoherencePolicyWithUncached {
xactReplyReadExclusive -> tileExclusiveDirty,
xactReplyReadExclusiveAck -> tileExclusiveDirty,
xactReplyReadUncached -> tileInvalid,
xactReplyWriteUncached -> tileInvalid
xactReplyWriteUncached -> tileInvalid,
xactReplyReadWordUncached -> tileInvalid,
xactReplyWriteWordUncached -> tileInvalid,
xactReplyAtomicUncached -> tileInvalid
))
}
def newStateOnProbeRequest(incoming: ProbeRequest, state: UFix): Bits = {
@ -461,8 +529,12 @@ class MSICoherence extends CoherencePolicyWithUncached {
))
}
def getTransactionInitTypeOnUncachedRead() = xactInitReadUncached
def getTransactionInitTypeOnUncachedWrite() = xactInitWriteUncached
def getUncachedReadTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadUncached, addr, id)
def getUncachedWriteTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitWriteUncached, addr, id)
def getUncachedReadWordTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadWordUncached, addr, id)
def getUncachedWriteWordTransactionInit(addr: UFix, id: UFix, write_mask: Bits) = TransactionInit(xactInitWriteWordUncached, addr, id, write_mask)
def getUncachedAtomicTransactionInit(addr: UFix, id: UFix, subword_addr: UFix, atomic_op: UFix) = TransactionInit(xactInitAtomicUncached, addr, id, subword_addr, atomic_op)
def getTransactionInitTypeOnPrimaryMiss(cmd: Bits, state: UFix): UFix = {
val (read, write) = cpuCmdToRW(cmd)
Mux(write || cmd === M_PFW, xactInitReadExclusive, xactInitReadShared)
@ -496,15 +568,14 @@ class MSICoherence extends CoherencePolicyWithUncached {
reply.p_type === probeRepDowngradeData ||
reply.p_type === probeRepCopyData)
}
def messageHasData (init: TransactionInit): Bool = {
(init.x_type === xactInitWriteUncached)
}
def messageHasData (init: TransactionInit): Bool = hasDataTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def messageHasData (reply: TransactionReply): Bool = {
(reply.x_type != xactReplyWriteUncached && reply.x_type != xactReplyReadExclusiveAck)
(reply.x_type != xactReplyWriteUncached && reply.x_type != xactReplyReadExclusiveAck && reply.x_type != xactReplyWriteWordUncached)
}
def messageUpdatesDataArray (reply: TransactionReply): Bool = {
(reply.x_type === xactReplyReadShared || reply.x_type === xactReplyReadExclusive)
}
def messageIsUncached(init: TransactionInit): Bool = uncachedTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def isCoherenceConflict(addr1: Bits, addr2: Bits): Bool = (addr1 === addr2)
@ -513,7 +584,10 @@ class MSICoherence extends CoherencePolicyWithUncached {
xactInitReadShared -> Mux(count > UFix(0), xactReplyReadShared, xactReplyReadExclusive),
xactInitReadExclusive -> xactReplyReadExclusive,
xactInitReadUncached -> xactReplyReadUncached,
xactInitWriteUncached -> xactReplyWriteUncached
xactInitWriteUncached -> xactReplyWriteUncached,
xactInitReadWordUncached -> xactReplyReadWordUncached,
xactInitWriteWordUncached -> xactReplyWriteWordUncached,
xactInitAtomicUncached -> xactReplyAtomicUncached
))
}
@ -542,10 +616,12 @@ class MESICoherence extends CoherencePolicyWithUncached {
val tileInvalid :: tileShared :: tileExclusiveClean :: tileExclusiveDirty :: Nil = Enum(4){ UFix() }
val globalInvalid :: globalShared :: globalExclusiveClean :: Nil = Enum(3){ UFix() }
val xactInitReadShared :: xactInitReadExclusive :: xactInitReadUncached :: xactInitWriteUncached :: Nil = Enum(4){ UFix() }
val xactReplyReadShared :: xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: xactReplyReadExclusiveAck :: Nil = Enum(5){ UFix() }
val xactInitReadShared :: xactInitReadExclusive :: xactInitReadUncached :: xactInitWriteUncached :: xactInitReadWordUncached :: xactInitWriteWordUncached :: xactInitAtomicUncached :: Nil = Enum(7){ UFix() }
val xactReplyReadShared :: xactReplyReadExclusive :: xactReplyReadUncached :: xactReplyWriteUncached :: xactReplyReadExclusiveAck :: xactReplyReadWordUncached :: xactReplyWriteWordUncached :: xactReplyAtomicUncached :: Nil = Enum(8){ UFix() }
val probeReqInvalidate :: probeReqDowngrade :: probeReqCopy :: Nil = Enum(3){ UFix() }
val probeRepInvalidateData :: probeRepDowngradeData :: probeRepCopyData :: probeRepInvalidateAck :: probeRepDowngradeAck :: probeRepCopyAck :: Nil = Enum(6){ UFix() }
val uncachedTypeList = List(xactInitReadUncached, xactInitWriteUncached, xactReplyReadWordUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
val hasDataTypeList = List(xactInitWriteUncached, xactInitWriteWordUncached, xactInitAtomicUncached)
def isHit (cmd: Bits, state: UFix): Bool = {
val (read, write) = cpuCmdToRW(cmd)
@ -558,7 +634,7 @@ class MESICoherence extends CoherencePolicyWithUncached {
def needsTransactionOnSecondaryMiss(cmd: Bits, outstanding: TransactionInit): Bool = {
val (read, write) = cpuCmdToRW(cmd)
(read && (outstanding.x_type === xactInitReadUncached || outstanding.x_type === xactInitWriteUncached)) ||
(read && messageIsUncached(outstanding)) ||
(write && (outstanding.x_type != xactInitReadExclusive))
}
def needsTransactionOnCacheControl(cmd: Bits, state: UFix): Bool = {
@ -589,7 +665,10 @@ class MESICoherence extends CoherencePolicyWithUncached {
xactReplyReadExclusive -> Mux(outstanding.x_type === xactInitReadExclusive, tileExclusiveDirty, tileExclusiveClean),
xactReplyReadExclusiveAck -> tileExclusiveDirty,
xactReplyReadUncached -> tileInvalid,
xactReplyWriteUncached -> tileInvalid
xactReplyWriteUncached -> tileInvalid,
xactReplyReadWordUncached -> tileInvalid,
xactReplyWriteWordUncached -> tileInvalid,
xactReplyAtomicUncached -> tileInvalid
))
}
def newStateOnProbeRequest(incoming: ProbeRequest, state: UFix): Bits = {
@ -600,8 +679,12 @@ class MESICoherence extends CoherencePolicyWithUncached {
))
}
def getTransactionInitTypeOnUncachedRead() = xactInitReadUncached
def getTransactionInitTypeOnUncachedWrite() = xactInitWriteUncached
def getUncachedReadTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadUncached, addr, id)
def getUncachedWriteTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitWriteUncached, addr, id)
def getUncachedReadWordTransactionInit(addr: UFix, id: UFix) = TransactionInit(xactInitReadWordUncached, addr, id)
def getUncachedWriteWordTransactionInit(addr: UFix, id: UFix, write_mask: Bits) = TransactionInit(xactInitWriteWordUncached, addr, id, write_mask)
def getUncachedAtomicTransactionInit(addr: UFix, id: UFix, subword_addr: UFix, atomic_op: UFix) = TransactionInit(xactInitAtomicUncached, addr, id, subword_addr, atomic_op)
def getTransactionInitTypeOnPrimaryMiss(cmd: Bits, state: UFix): UFix = {
val (read, write) = cpuCmdToRW(cmd)
Mux(write || cmd === M_PFW, xactInitReadExclusive, xactInitReadShared)
@ -635,15 +718,14 @@ class MESICoherence extends CoherencePolicyWithUncached {
reply.p_type === probeRepDowngradeData ||
reply.p_type === probeRepCopyData)
}
def messageHasData (init: TransactionInit): Bool = {
(init.x_type === xactInitWriteUncached)
}
def messageHasData (init: TransactionInit): Bool = hasDataTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def messageHasData (reply: TransactionReply): Bool = {
(reply.x_type != xactReplyWriteUncached && reply.x_type != xactReplyReadExclusiveAck)
(reply.x_type != xactReplyWriteUncached && reply.x_type != xactReplyReadExclusiveAck && reply.x_type != xactReplyWriteWordUncached)
}
def messageUpdatesDataArray (reply: TransactionReply): Bool = {
(reply.x_type === xactReplyReadShared || reply.x_type === xactReplyReadExclusive)
}
def messageIsUncached(init: TransactionInit): Bool = uncachedTypeList.map(t => init.x_type === t).reduceLeft(_||_)
def isCoherenceConflict(addr1: Bits, addr2: Bits): Bool = (addr1 === addr2)
@ -652,7 +734,10 @@ class MESICoherence extends CoherencePolicyWithUncached {
xactInitReadShared -> Mux(count > UFix(0), xactReplyReadShared, xactReplyReadExclusive),
xactInitReadExclusive -> xactReplyReadExclusive,
xactInitReadUncached -> xactReplyReadUncached,
xactInitWriteUncached -> xactReplyWriteUncached
xactInitWriteUncached -> xactReplyWriteUncached,
xactInitReadWordUncached -> xactReplyReadWordUncached,
xactInitWriteWordUncached -> xactReplyWriteWordUncached,
xactInitAtomicUncached -> xactReplyAtomicUncached
))
}
@ -661,7 +746,10 @@ class MESICoherence extends CoherencePolicyWithUncached {
xactInitReadShared -> probeReqDowngrade,
xactInitReadExclusive -> probeReqInvalidate,
xactInitReadUncached -> probeReqCopy,
xactInitWriteUncached -> probeReqInvalidate
xactInitWriteUncached -> probeReqInvalidate,
xactInitReadWordUncached -> probeReqCopy,
xactInitWriteWordUncached -> probeReqInvalidate,
xactInitAtomicUncached -> probeReqInvalidate
))
}

3
rocket/src/main/scala/consts.scala
View File

@ -200,6 +200,9 @@ object Constants
val GLOBAL_XACT_ID_BITS = log2Up(NGLOBAL_XACTS)
val X_INIT_TYPE_MAX_BITS = 2
val X_INIT_WRITE_MASK_BITS = OFFSET_BITS
val X_INIT_SUBWORD_ADDR_BITS = log2Up(OFFSET_BITS)
val X_INIT_ATOMIC_OP_BITS = 4
val X_REP_TYPE_MAX_BITS = 3
val P_REQ_TYPE_MAX_BITS = 2
val P_REP_TYPE_MAX_BITS = 3

4
rocket/src/main/scala/htif.scala
View File

@ -176,8 +176,8 @@ class rocketHTIF(w: Int, ncores: Int, co: CoherencePolicyWithUncached) extends C
mem_req_data = Cat(packet_ram(idx), mem_req_data)
}
x_init.io.enq.valid := state === state_mem_req
x_init.io.enq.bits.x_type := Mux(cmd === cmd_writemem, co.getTransactionInitTypeOnUncachedWrite, co.getTransactionInitTypeOnUncachedRead)
x_init.io.enq.bits.address := addr.toUFix >> UFix(OFFSET_BITS-3)
val init_addr = addr.toUFix >> UFix(OFFSET_BITS-3)
x_init.io.enq.bits := Mux(cmd === cmd_writemem, co.getUncachedWriteTransactionInit(init_addr, UFix(0)), co.getUncachedReadTransactionInit(init_addr, UFix(0)))
io.mem.xact_init <> x_init.io.deq
io.mem.xact_init_data.valid:= state === state_mem_wdata
io.mem.xact_init_data.bits.data := mem_req_data

3
rocket/src/main/scala/icache.scala
View File

@ -136,8 +136,7 @@ class rocketICache(sets: Int, assoc: Int, co: CoherencePolicyWithUncached) exten
rdy := !io.cpu.itlb_miss && (state === s_ready) && (!r_cpu_req_val || tag_hit);
io.cpu.resp_data := data_mux.io.out
io.mem.xact_init.valid := (state === s_request) && finish_q.io.enq.ready
io.mem.xact_init.bits.x_type := co.getTransactionInitTypeOnUncachedRead
io.mem.xact_init.bits.address := r_cpu_miss_addr(tagmsb,indexlsb).toUFix
io.mem.xact_init.bits := co.getUncachedReadTransactionInit(r_cpu_miss_addr(tagmsb,indexlsb).toUFix, UFix(0))
io.mem.xact_finish <> finish_q.io.deq
// control state machine

18
rocket/src/main/scala/nbdcache.scala
View File

@ -282,7 +282,7 @@ class MSHR(id: Int, co: CoherencePolicy) extends Component {
io.mem_req.valid := (state === s_refill_req) && !flush
io.mem_req.bits.x_type := xacx_type
io.mem_req.bits.address := Cat(req.tag, req.idx).toUFix
io.mem_req.bits.addr := Cat(req.tag, req.idx).toUFix
io.mem_req.bits.tile_xact_id := Bits(id)
io.mem_finish <> finish_q.io.deq
@ -475,7 +475,7 @@ class WritebackUnit(co: CoherencePolicy) extends Component {
io.mem_req.valid := valid && !cmd_sent
io.mem_req.bits.x_type := co.getTransactionInitTypeOnWriteback()
io.mem_req.bits.address := Cat(req.tag, req.idx).toUFix
io.mem_req.bits.addr := Cat(req.tag, req.idx).toUFix
io.mem_req.bits.tile_xact_id := req.tile_xact_id
io.mem_req_data.valid := data_req_fired && !is_probe
io.mem_req_data.bits.data := io.data_resp
@ -492,7 +492,7 @@ class ProbeUnit(co: CoherencePolicy) extends Component {
val wb_req = (new FIFOIO) { new WritebackReq }
val tag_match_way_oh = Bits(INPUT, NWAYS)
val line_state = UFix(INPUT, 2)
val address = Bits(OUTPUT, PADDR_BITS-OFFSET_BITS)
val addr = Bits(OUTPUT, PADDR_BITS-OFFSET_BITS)
}
val s_reset :: s_invalid :: s_meta_req :: s_meta_resp :: s_mshr_req :: s_probe_rep :: s_writeback_req :: s_writeback_resp :: Nil = Enum(8) { UFix() }
@ -535,16 +535,16 @@ class ProbeUnit(co: CoherencePolicy) extends Component {
io.meta_req.valid := state === s_meta_req || state === s_meta_resp || state === s_mshr_req || state === s_probe_rep && hit
io.meta_req.bits.way_en := Mux(state === s_probe_rep, way_oh, ~UFix(0, NWAYS))
io.meta_req.bits.rw := state === s_probe_rep
io.meta_req.bits.idx := req.address
io.meta_req.bits.idx := req.addr
io.meta_req.bits.data.state := co.newStateOnProbeRequest(req, line_state)
io.meta_req.bits.data.tag := req.address >> UFix(IDX_BITS)
io.meta_req.bits.data.tag := req.addr >> UFix(IDX_BITS)
io.mshr_req.valid := state === s_meta_resp || state === s_mshr_req
io.address := req.address
io.addr := req.addr
io.wb_req.valid := state === s_writeback_req
io.wb_req.bits.way_oh := way_oh
io.wb_req.bits.idx := req.address
io.wb_req.bits.tag := req.address >> UFix(IDX_BITS)
io.wb_req.bits.idx := req.addr
io.wb_req.bits.tag := req.addr >> UFix(IDX_BITS)
}
class FlushUnit(lines: Int, co: CoherencePolicy) extends Component {
@ -860,7 +860,7 @@ class HellaCache(co: CoherencePolicy) extends Component {
meta_arb.io.in(3).bits.rw := Bool(false)
meta_arb.io.in(3).bits.way_en := ~UFix(0, NWAYS)
val early_tag_nack = !meta_arb.io.in(3).ready
val cpu_req_ppn = Mux(prober.io.mshr_req.valid, prober.io.address >> UFix(PGIDX_BITS-OFFSET_BITS), io.cpu.req.bits.ppn)
val cpu_req_ppn = Mux(prober.io.mshr_req.valid, prober.io.addr >> UFix(PGIDX_BITS-OFFSET_BITS), io.cpu.req.bits.ppn)
val cpu_req_tag = Cat(cpu_req_ppn, r_cpu_req_idx)(tagmsb,taglsb)
val tag_match_arr = (0 until NWAYS).map( w => co.isValid(meta.io.resp(w).state) && (meta.io.resp(w).tag === cpu_req_tag))
val tag_match = Cat(Bits(0),tag_match_arr:_*).orR

15
rocket/src/main/scala/uncore.scala
View File

@ -3,14 +3,17 @@ package rocket
import Chisel._
import Constants._
class PhysicalAddress extends Bundle {
val addr = UFix(width = PADDR_BITS - OFFSET_BITS)
}
class MemData extends Bundle {
val data = Bits(width = MEM_DATA_BITS)
}
class MemReqCmd() extends Bundle
class MemReqCmd() extends PhysicalAddress
{
val rw = Bool()
val addr = UFix(width = PADDR_BITS - OFFSET_BITS)
val tag = Bits(width = MEM_TAG_BITS)
}
@ -165,7 +168,7 @@ class XactTracker(ntiles: Int, id: Int, co: CoherencePolicy) extends Component {
io.probe_req.valid := Bool(false)
io.probe_req.bits.p_type := co.getProbeRequestType(x_type_, UFix(0))
io.probe_req.bits.global_xact_id := UFix(id)
io.probe_req.bits.address := addr_
io.probe_req.bits.addr := addr_
io.push_p_req := Bits(0, width = ntiles)
io.pop_p_rep := Bits(0, width = ntiles)
io.pop_p_rep_data := Bits(0, width = ntiles)
@ -178,7 +181,7 @@ class XactTracker(ntiles: Int, id: Int, co: CoherencePolicy) extends Component {
switch (state) {
is(s_idle) {
when( io.alloc_req.valid && io.can_alloc ) {
addr_ := io.alloc_req.bits.xact_init.address
addr_ := io.alloc_req.bits.xact_init.addr
x_type_ := io.alloc_req.bits.xact_init.x_type
init_tile_id_ := io.alloc_req.bits.tile_id
tile_xact_id_ := io.alloc_req.bits.xact_init.tile_xact_id
@ -272,7 +275,7 @@ class CoherenceHubNull(co: ThreeStateIncoherence) extends CoherenceHub(1, co)
io.mem.req_cmd.valid := x_init.valid && !(is_write && io.mem.resp.valid)
io.mem.req_cmd.bits.rw := is_write
io.mem.req_cmd.bits.tag := x_init.bits.tile_xact_id
io.mem.req_cmd.bits.addr := x_init.bits.address
io.mem.req_cmd.bits.addr := x_init.bits.addr
io.mem.req_data <> io.tiles(0).xact_init_data
val x_rep = io.tiles(0).xact_rep
@ -432,7 +435,7 @@ class CoherenceHubBroadcast(ntiles: Int, co: CoherencePolicy) extends CoherenceH
val conflicts = Vec(NGLOBAL_XACTS) { Bool() }
for( i <- 0 until NGLOBAL_XACTS) {
val t = trackerList(i).io
conflicts(i) := t.busy && x_init.valid && co.isCoherenceConflict(t.addr, x_init.bits.address)
conflicts(i) := t.busy && x_init.valid && co.isCoherenceConflict(t.addr, x_init.bits.addr)
}
x_abort.bits.tile_xact_id := x_init.bits.tile_xact_id
want_to_abort_arr(j) := x_init.valid && (conflicts.toBits.orR || busy_arr.toBits.andR || (!x_init_data_dep_list(j).io.enq.ready && co.messageHasData(x_init.bits)))