riscv/rocket-chip
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cleanup mergeData buffer

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This commit is contained in:
Henry Cook
2015-03-16 15:06:46 -07:00
parent 145e15701e
commit 36fc67dc7c
1 changed files with 13 additions and 13 deletions
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26
uncore/src/main/scala/cache.scala
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@@ -642,23 +642,23 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
def mergeData[T <: HasTileLinkData]
(byteAddrBits: Int, dataBits: Int)
(buffer: Vec[UInt], beat: UInt, incoming: UInt) {
(beat: UInt, incoming: UInt) {
val old_data = incoming // Refilled, written back, or de-cached data
val new_data = buffer(beat) // Newly Put data is in the buffer
val new_data = 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 amoOffset = xact.addr_byte()(byteAddrBits-1, log2Up(amoAluOperandBits/8))
amoalu.io.lhs := old_data >> amoOffset*amoOpSz
amoalu.io.rhs := new_data >> amoOffset*amoOpSz
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)),
FillInterleaved(amoAluOperandBits, UIntToOH(amoOffset)),
Mux(xact.is(Acquire.putBlockType) || xact.is(Acquire.putType),
FillInterleaved(8, xact.write_mask()),
FillInterleaved(8, write_mask_buffer(beat)),
UInt(0, width = dataBits)))
buffer(beat) := ~wmask & old_data | wmask &
Mux(xact.is(Acquire.putAtomicType), amoalu.io.out << offset*amoOpSz, new_data)
data_buffer(beat) := ~wmask & old_data | wmask &
Mux(xact.is(Acquire.putAtomicType), amoalu.io.out << amoOffset*amoOpSz, new_data)
when(xact.is(Acquire.putAtomicType) && valid_beat) { amo_result := old_data }
}
val mergeDataInternal = mergeData(log2Up(rowBits/8), rowBits) _
@@ -831,7 +831,7 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
when(io.irel().hasData()) {
irel_had_data := Bool(true)
pending_coh.outer := pending_ocoh_on_irel
mergeDataInner(data_buffer, io.irel().addr_beat, io.irel().data)
mergeDataInner(io.irel().addr_beat, io.irel().data)
}
// We don't decrement release_count until we've received all the data beats.
when(!io.irel().hasMultibeatData() || irel_data_done) {
@@ -852,7 +852,7 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
io.outer.grant.ready := Bool(true)
when(io.outer.grant.valid) {
when(io.ognt().hasData()) {
mergeDataOuter(data_buffer, io.ognt().addr_beat, io.ognt().data)
mergeDataOuter(io.ognt().addr_beat, io.ognt().data)
ognt_had_data := Bool(true)
}
when(ognt_data_done) {
@@ -879,13 +879,13 @@ class L2AcquireTracker(trackerId: Int, bankId: Int) extends L2XactTracker {
is(s_data_read) {
io.data.read.valid := !collect_iacq_data || iacq_data_valid(read_data_cnt)
when(io.data.resp.valid) {
mergeDataInternal(data_buffer, io.data.resp.bits.addr_beat, io.data.resp.bits.data)
mergeDataInternal(io.data.resp.bits.addr_beat, io.data.resp.bits.data)
}
when(read_data_done) { state := s_data_resp }
}
is(s_data_resp) {
when(io.data.resp.valid) {
mergeDataInternal(data_buffer, io.data.resp.bits.addr_beat, io.data.resp.bits.data)
mergeDataInternal(io.data.resp.bits.addr_beat, io.data.resp.bits.data)
}
when(resp_data_done) {
state := Mux(xact.hasData(), s_data_write, s_inner_grant)