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crossings: change defaults to sync=3 for safer settling time

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Make the matching AsyncQueue depth=8 to support full throughput
This commit is contained in:
Wesley W. Terpstra 2016-09-13 15:49:08 -07:00
parent 3348236320
commit 44501cdbf8
2 changed files with 5 additions and 5 deletions
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6
src/main/scala/junctions/nasti.scala
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@ -708,7 +708,7 @@ class NastiMemoryDemux(nRoutes: Int)(implicit p: Parameters) extends NastiModule
object AsyncNastiCrossing { object AsyncNastiCrossing {
// takes from_source from the 'from' clock domain to the 'to' clock domain // takes from_source from the 'from' clock domain to the 'to' clock domain
def apply(from_clock: Clock, from_reset: Bool, from_source: NastiIO, to_clock: Clock, to_reset: Bool, depth: Int = 3, sync: Int = 2) = { def apply(from_clock: Clock, from_reset: Bool, from_source: NastiIO, to_clock: Clock, to_reset: Bool, depth: Int = 8, sync: Int = 3) = {
val to_sink = Wire(new NastiIO()(from_source.p)) val to_sink = Wire(new NastiIO()(from_source.p))
to_sink.aw <> AsyncDecoupledCrossing(from_clock, from_reset, from_source.aw, to_clock, to_reset, depth, sync) to_sink.aw <> AsyncDecoupledCrossing(from_clock, from_reset, from_source.aw, to_clock, to_reset, depth, sync)
@ -723,7 +723,7 @@ object AsyncNastiCrossing {
object AsyncNastiTo { object AsyncNastiTo {
// takes source from your clock domain and puts it into the 'to' clock domain // takes source from your clock domain and puts it into the 'to' clock domain
def apply(to_clock: Clock, to_reset: Bool, source: NastiIO, depth: Int = 3, sync: Int = 2): NastiIO = { def apply(to_clock: Clock, to_reset: Bool, source: NastiIO, depth: Int = 8, sync: Int = 3): NastiIO = {
val scope = AsyncScope() val scope = AsyncScope()
AsyncNastiCrossing(scope.clock, scope.reset, source, to_clock, to_reset, depth, sync) AsyncNastiCrossing(scope.clock, scope.reset, source, to_clock, to_reset, depth, sync)
} }
@ -731,7 +731,7 @@ object AsyncNastiTo {
object AsyncNastiFrom { object AsyncNastiFrom {
// takes from_source from the 'from' clock domain and puts it into your clock domain // takes from_source from the 'from' clock domain and puts it into your clock domain
def apply(from_clock: Clock, from_reset: Bool, from_source: NastiIO, depth: Int = 3, sync: Int = 2): NastiIO = { def apply(from_clock: Clock, from_reset: Bool, from_source: NastiIO, depth: Int = 8, sync: Int = 3): NastiIO = {
val scope = AsyncScope() val scope = AsyncScope()
AsyncNastiCrossing(from_clock, from_reset, from_source, scope.clock, scope.reset, depth, sync) AsyncNastiCrossing(from_clock, from_reset, from_source, scope.clock, scope.reset, depth, sync)
} }

4
src/main/scala/uncore/devices/Debug.scala
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@ -994,7 +994,7 @@ object AsyncDebugBusCrossing {
object AsyncDebugBusFrom { // OutsideClockDomain object AsyncDebugBusFrom { // OutsideClockDomain
// takes from_source from the 'from' clock domain and puts it into your clock domain // takes from_source from the 'from' clock domain and puts it into your clock domain
def apply(from_clock: Clock, from_reset: Bool, from_source: DebugBusIO, depth: Int = 0, sync: Int = 2): DebugBusIO = { def apply(from_clock: Clock, from_reset: Bool, from_source: DebugBusIO, depth: Int = 1, sync: Int = 3): DebugBusIO = {
val scope = AsyncScope() val scope = AsyncScope()
AsyncDebugBusCrossing(from_clock, from_reset, from_source, scope.clock, scope.reset, depth, sync) AsyncDebugBusCrossing(from_clock, from_reset, from_source, scope.clock, scope.reset, depth, sync)
} }
@ -1002,7 +1002,7 @@ object AsyncDebugBusFrom { // OutsideClockDomain
object AsyncDebugBusTo { // OutsideClockDomain object AsyncDebugBusTo { // OutsideClockDomain
// takes source from your clock domain and puts it into the 'to' clock domain // takes source from your clock domain and puts it into the 'to' clock domain
def apply(to_clock: Clock, to_reset: Bool, source: DebugBusIO, depth: Int = 0, sync: Int = 2): DebugBusIO = { def apply(to_clock: Clock, to_reset: Bool, source: DebugBusIO, depth: Int = 1, sync: Int = 3): DebugBusIO = {
val scope = AsyncScope() val scope = AsyncScope()
AsyncDebugBusCrossing(scope.clock, scope.reset, source, to_clock, to_reset, depth, sync) AsyncDebugBusCrossing(scope.clock, scope.reset, source, to_clock, to_reset, depth, sync)
} }