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Reduce crossing and queue depths to save space and ease timing

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This commit is contained in:
Klemens Schölhorn 2018-05-14 20:07:01 +02:00
parent 700e6b640d
commit b49f5cfa78
1 changed files with 3 additions and 3 deletions
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src/main/scala/devices/xilinx/xilinxml507mig/XilinxML507MIG.scala
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@ -47,7 +47,7 @@ class XilinxML507MIGToTL(c: XilinxML507MIGParams)(implicit p: Parameters) extend
val address_range = AddressRange.fromSets(c.address).head val address_range = AddressRange.fromSets(c.address).head
require(log2Ceil(address_range.size) == 28, "Max 256MiB DIMMs supported") require(log2Ceil(address_range.size) == 28, "Max 256MiB DIMMs supported")
val crossing = AsynchronousCrossing(8) val crossing = AsynchronousCrossing(1)
val device = new MemoryDevice val device = new MemoryDevice
val node = TLManagerNode( val node = TLManagerNode(
@ -101,7 +101,7 @@ class XilinxML507MIGToTL(c: XilinxML507MIGParams)(implicit p: Parameters) extend
// Save the source, size and type of the requests in a queue so we // Save the source, size and type of the requests in a queue so we
// can synthesize the right responses in fifo order. The length also // can synthesize the right responses in fifo order. The length also
// determines the maximum number of in-flight requests. // determines the maximum number of in-flight requests.
val ack_queue = Module(new Queue(new ResponseQueueIO, 4)) val ack_queue = Module(new Queue(new ResponseQueueIO, 2))
// Pass data directly to the controller // Pass data directly to the controller
controller.io.request_addr := address controller.io.request_addr := address
@ -127,7 +127,7 @@ class XilinxML507MIGToTL(c: XilinxML507MIGParams)(implicit p: Parameters) extend
// avoid losing any responses, this queue *must* be at least as wide // avoid losing any responses, this queue *must* be at least as wide
// as the ack queue, so that we can catch all responses, even if the // as the ack queue, so that we can catch all responses, even if the
// ack queue is completely filled with read requests. // ack queue is completely filled with read requests.
val response_queue = Module(new Queue(controller.io.response_data, 4)) val response_queue = Module(new Queue(controller.io.response_data, 2))
response_queue.io.enq.bits := controller.io.response_data response_queue.io.enq.bits := controller.io.response_data
response_queue.io.enq.valid := controller.io.response_valid response_queue.io.enq.valid := controller.io.response_valid