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Move XilinxML507MIGToTL and MIG into a separate clock domain

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This commit is contained in:
Klemens Schölhorn 2018-05-10 00:30:23 +02:00
parent 2707fa59a4
commit 589e9960c0
1 changed files with 9 additions and 2 deletions
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11
src/main/scala/devices/xilinx/xilinxml507mig/XilinxML507MIG.scala
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@ -6,6 +6,7 @@ import Chisel._
import chisel3.core.{Input, Output} import chisel3.core.{Input, Output}
import freechips.rocketchip.config.Parameters import freechips.rocketchip.config.Parameters
import freechips.rocketchip.diplomacy._ import freechips.rocketchip.diplomacy._
import freechips.rocketchip.subsystem.{AsynchronousCrossing, HasCrossing}
import freechips.rocketchip.tilelink._ import freechips.rocketchip.tilelink._
import freechips.rocketchip.util._ import freechips.rocketchip.util._
@ -33,10 +34,11 @@ class MemoryController extends BlackBox {
override def desiredName: String = "memory_controller" override def desiredName: String = "memory_controller"
} }
class XilinxML507MIGToTL(c: XilinxML507MIGParams)(implicit p: Parameters) extends LazyModule { class XilinxML507MIGToTL(c: XilinxML507MIGParams)(implicit p: Parameters) extends LazyModule with HasCrossing {
// Corresponds to MIG interface with 64 bit width and a burst length of 4 // Corresponds to MIG interface with 64 bit width and a burst length of 4
val width = 256 val width = 256
val beatBytes = width/8 // 32 byte (half a cache-line, fragmented) val beatBytes = width/8 // 32 byte (half a cache-line, fragmented)
val crossing = AsynchronousCrossing(8)
val device = new MemoryDevice val device = new MemoryDevice
val node = TLManagerNode( val node = TLManagerNode(
@ -126,7 +128,7 @@ class XilinxML507MIG(c : XilinxML507MIGParams)(implicit p: Parameters) extends L
val island = LazyModule(new XilinxML507MIGToTL(c)) val island = LazyModule(new XilinxML507MIGToTL(c))
val node: TLInwardNode = val node: TLInwardNode =
island.node := fragmenter.node island.node := island.crossTLIn := fragmenter.node
lazy val module = new LazyModuleImp(this) { lazy val module = new LazyModuleImp(this) {
val io = IO(new Bundle { val io = IO(new Bundle {
@ -136,5 +138,10 @@ class XilinxML507MIG(c : XilinxML507MIGParams)(implicit p: Parameters) extends L
io.port_sys <> island.module.io.port_sys io.port_sys <> island.module.io.port_sys
io.port_ddr2 <> island.module.io.port_ddr2 io.port_ddr2 <> island.module.io.port_ddr2
// The MIGToTL module lives in a separate clock domain together with
// the MIG, which is why it is called "island".
island.module.clock := io.port_sys.clk0
island.module.reset := io.port_sys.reset
} }
} }