Merge remote-tracking branch 'origin/dev' into chisel-3.5-published

generators/chipyard/src/main/scala/DigitalTop.scala

@@ -32,6 +32,7 @@ class DigitalTop(implicit p: Parameters) extends ChipyardSystem
   with chipyard.example.CanHavePeripheryStreamingPassthrough // Enables optionally adding the DSPTools streaming-passthrough example widget
   with nvidia.blocks.dla.CanHavePeripheryNVDLA // Enables optionally having an NVDLA
   with chipyard.clocking.HasChipyardPRCI // Use Chipyard reset/clock distribution
+  with fftgenerator.CanHavePeripheryFFT // Enables optionally having an MMIO-based FFT block
 {
   override lazy val module = new DigitalTopModule(this)
 }

generators/chipyard/src/main/scala/config/RocketConfigs.scala

@@ -21,6 +21,13 @@ class TinyRocketConfig extends Config(
   new freechips.rocketchip.subsystem.With1TinyCore ++             // single tiny rocket-core
   new chipyard.config.AbstractConfig)
 
+// DOC include start: FFTRocketConfig
+class FFTRocketConfig extends Config(
+  new fftgenerator.WithFFTGenerator(baseAddr=0x2000, numPoints=8, width=16, decPt=8) ++ // add 8-point mmio fft at 0x2000 with 16bit fixed-point numbers.
+  new freechips.rocketchip.subsystem.WithNBigCores(1) ++
+  new chipyard.config.AbstractConfig)
+// DOC include end: FFTRocketConfig
+
 class HwachaRocketConfig extends Config(
   new chipyard.config.WithHwachaTest ++
   new hwacha.DefaultHwachaConfig ++                              // use Hwacha vector accelerator