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make sure generators can detect lockup

This commit is contained in:
Howard Mao 2015-11-10 14:39:56 -08:00
parent 520925c207
commit 13f62e0364

View File

@ -19,6 +19,42 @@ trait HasGeneratorParams {
val nGens = nGensPerTile * nGenTiles
val genUncached = p(GenerateUncached)
val genCached = p(GenerateCached)
val genTimeout = 4096
}
class Timer(initCount: Int) extends Module {
val io = new Bundle {
val start = Bool(INPUT)
val stop = Bool(INPUT)
val timeout = Bool(OUTPUT)
}
val countdown = Reg(UInt(width = log2Up(initCount)))
val active = Reg(init = Bool(false))
when (io.start) {
countdown := UInt(initCount - 1)
active := Bool(true)
}
when (io.stop) {
active := Bool(false)
}
when (active) {
countdown := countdown - UInt(1)
}
io.timeout := countdown === UInt(0)
}
object Timer {
def apply(initCount: Int, start: Bool, stop: Bool): Bool = {
val timer = Module(new Timer(initCount))
timer.io.start := start
timer.io.stop := stop
timer.io.timeout
}
}
class UncachedTileLinkGenerator(id: Int)
@ -60,6 +96,9 @@ class UncachedTileLinkGenerator(id: Int)
}
}
val timeout = Timer(genTimeout, io.mem.acquire.fire(), io.mem.grant.fire())
assert(!timeout, s"Uncached generator ${id} timed out waiting for grant")
io.finished := (state === s_finished)
val full_addr = Cat(req_cnt, UInt(id, log2Up(nGens)), UInt(0, wordOffset))
@ -117,6 +156,9 @@ class HellaCacheGenerator(id: Int)
val mem = new HellaCacheIO
}
val timeout = Timer(genTimeout, io.mem.req.fire(), io.mem.resp.fire())
assert(!timeout, s"Cached generator ${id} timed out waiting for response")
val (s_start :: s_write :: s_read :: s_finished :: Nil) = Enum(Bits(), 4)
val state = Reg(init = s_start)
val sending = Reg(init = Bool(false))