riscv/rocket-chip
1
0
Fork 0
Code Releases Activity

crossing: refactor AsyncDecoupled to provide AsyncDecoupledCrossing with no clock domain

Browse Source
This commit is contained in:
Wesley W. Terpstra
2016-09-07 13:55:22 -07:00
parent 33a05786db
commit ecdfb528c5
4 changed files with 91 additions and 97 deletions
Download Patch File Download Diff File Expand all files Collapse all files

45
src/main/scala/junctions/nasti.scala
View File

@ -706,32 +706,33 @@ class NastiMemoryDemux(nRoutes: Int)(implicit p: Parameters) extends NastiModule
}
}
object AsyncNastiCrossing {
// 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) = {
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.ar <> AsyncDecoupledCrossing(from_clock, from_reset, from_source.ar, to_clock, to_reset, depth, sync)
to_sink.w <> AsyncDecoupledCrossing(from_clock, from_reset, from_source.w, to_clock, to_reset, depth, sync)
from_source.b <> AsyncDecoupledCrossing(to_clock, to_reset, to_sink.b, from_clock, from_reset, depth, sync)
from_source.r <> AsyncDecoupledCrossing(to_clock, to_reset, to_sink.r, from_clock, from_reset, depth, sync)
to_sink // is now to_source
}
}
object AsyncNastiTo {
// source(master) is in our clock domain, output is in the 'to' clock domain
def apply[T <: Data](to_clock: Clock, to_reset: Bool, source: NastiIO, depth: Int = 3, sync: Int = 2)(implicit p: Parameters): NastiIO = {
val sink = Wire(new NastiIO)
sink.aw <> AsyncDecoupledTo(to_clock, to_reset, source.aw, depth, sync)
sink.ar <> AsyncDecoupledTo(to_clock, to_reset, source.ar, depth, sync)
sink.w <> AsyncDecoupledTo(to_clock, to_reset, source.w, depth, sync)
source.b <> AsyncDecoupledFrom(to_clock, to_reset, sink.b, depth, sync)
source.r <> AsyncDecoupledFrom(to_clock, to_reset, sink.r, depth, sync)
sink
// 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 = {
val scope = AsyncScope()
AsyncNastiCrossing(scope.clock, scope.reset, source, to_clock, to_reset, depth, sync)
}
}
object AsyncNastiFrom {
// source(master) is in the 'from' clock domain, output is in our clock domain
def apply[T <: Data](from_clock: Clock, from_reset: Bool, source: NastiIO, depth: Int = 3, sync: Int = 2)(implicit p: Parameters): NastiIO = {
val sink = Wire(new NastiIO)
sink.aw <> AsyncDecoupledFrom(from_clock, from_reset, source.aw, depth, sync)
sink.ar <> AsyncDecoupledFrom(from_clock, from_reset, source.ar, depth, sync)
sink.w <> AsyncDecoupledFrom(from_clock, from_reset, source.w, depth, sync)
source.b <> AsyncDecoupledTo(from_clock, from_reset, sink.b, depth, sync)
source.r <> AsyncDecoupledTo(from_clock, from_reset, sink.r, depth, sync)
sink
// 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 = {
val scope = AsyncScope()
AsyncNastiCrossing(from_clock, from_reset, from_source, scope.clock, scope.reset, depth, sync)
}
}