riscv/rocket-chip
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further amo cleanups

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This commit is contained in:
Henry Cook 2015-03-16 13:27:05 -07:00
parent f35a6a574f
commit cf1df2d72a
1 changed files with 8 additions and 5 deletions
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13
uncore/src/main/scala/cache.scala
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@ -572,11 +572,11 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
val state = Reg(init=s_idle)
val xact_src = Reg(io.inner.acquire.bits.header.src.clone)
val xact = Reg(Bundle(new Acquire, { case TLId => params(InnerTLId); case TLDataBits => 0 }))
val xact = Reg(Bundle(new Acquire, { case TLId => params(InnerTLId) }))
val data_buffer = Vec.fill(innerDataBeats) {
Reg(io.iacq().data.clone)
}
val amo_result = Reg(io.iacq().data.clone)
val amo_result = xact.data
val xact_tag_match = Reg{ Bool() }
val xact_meta = Reg{ new L2Metadata }
val xact_way_en = Reg{ Bits(width = nWays) }
@ -638,13 +638,14 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
def mergeData[T <: HasTileLinkData]
(byteAddrBits: Int, dataBits: Int)
(buffer: Vec[UInt], beat: UInt, incoming: UInt) {
val old_data = incoming
val new_data = buffer(beat)
val old_data = incoming // Refilled, written back, or de-cached data
val new_data = buffer(beat) // Newly Put data is in the buffer
val amoOpSz = UInt(amoAluOperandBits)
val offset = xact.addr_byte()(byteAddrBits-1, log2Up(amoAluOperandBits/8))
amoalu.io.lhs := old_data >> offset*amoOpSz
amoalu.io.rhs := new_data >> offset*amoOpSz
val valid_beat = xact.is(Acquire.putBlockType) || xact.addr_beat === beat
val valid_beat = (xact.is(Acquire.putBlockType) || xact.addr_beat === beat) &&
xact.isBuiltInType() // Only custom a_types have data for now
val wmask = Fill(dataBits, valid_beat) &
Mux(xact.is(Acquire.putAtomicType),
FillInterleaved(amoAluOperandBits, UIntToOH(offset)),
@ -746,6 +747,7 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
io.iacq().client_xact_id != xact.client_xact_id),
"AcquireTracker accepted data beat from different client transaction than initial request.")
//TODO: Assumes in-order network
assert(!(state === s_idle && io.inner.acquire.fire() &&
io.iacq().addr_beat != UInt(0)),
"AcquireTracker initialized with a tail data beat.")
@ -765,6 +767,7 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
when(io.inner.acquire.valid) {
xact_src := io.inner.acquire.bits.header.src
xact := io.iacq()
xact.data := UInt(0)
data_buffer(io.iacq().addr_beat) := io.iacq().data
collect_iacq_data := io.iacq().hasMultibeatData()
iacq_data_valid := io.iacq().hasData() << io.iacq().addr_beat