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Commit 17e328ed authored by Jens Korinth's avatar Jens Korinth
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RegisterFile: Move behavior into method 

* behavior cannot be generated statically, because VirtualRegisters
  would then be unable to access values and regs of the module
* behavior is now generated by RegisterFile.behavior and
  RegisterFile.resetBehavior instead
* fixed definition of generic registerfile (no custom IO, regs, etc.)
parent 05b3795f
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Inline Side-by-side
src/main/scala/axi4lite/RegisterFile.scala
View file @ 17e328ed
......@@ -59,6 +59,95 @@ object RegisterFile {
override def cloneType = new IO(cfg)(axi).asInstanceOf[this.type]
}
def behavior(cfg: RegisterFile.Configuration, io: RegisterFile.IO)
(implicit axi: Axi4Lite.Configuration, logger: Logging, logLevel: Logging.Level) {
class ReadData extends Bundle {
val data = io.saxi.readData.bits.data.cloneType
val resp = io.saxi.readData.bits.resp.cloneType
override def cloneType = (new ReadData).asInstanceOf[this.type]
}
val in_q_ra = Module(new Queue(io.saxi.readAddr.bits.addr.cloneType, entries = cfg.fifoDepth, pipe = true))
val in_q_wa = Module(new Queue(io.saxi.writeAddr.bits.addr.cloneType, entries = cfg.fifoDepth, pipe = true))
val in_q_wd = Module(new Queue(io.saxi.writeData.bits.data.cloneType, entries = cfg.fifoDepth, pipe = true))
val read_reg = Reg((new ReadData).cloneType)
val resp_reg = RegNext(Response.slverr, init = Response.slverr)
val out_q_rd = Module(new Queue((new ReadData).cloneType, cfg.fifoDepth))
val out_q_wr = Module(new Queue(io.saxi.writeResp.bits.bresp.cloneType, cfg.fifoDepth))
io.saxi.readData.bits.defaults
io.saxi.readData.valid := false.B
io.saxi.writeResp.bits.defaults
io.saxi.writeResp.valid := false.B
in_q_ra.io.enq.bits := io.saxi.readAddr.bits.addr
in_q_ra.io.enq.valid := io.saxi.readAddr.valid
io.saxi.readAddr.ready := in_q_ra.io.enq.ready
in_q_wa.io.enq.bits := io.saxi.writeAddr.bits.addr
in_q_wa.io.enq.valid := io.saxi.writeAddr.valid
io.saxi.writeAddr.ready := in_q_wa.io.enq.ready
in_q_wd.io.enq.bits := io.saxi.writeData.bits.data
in_q_wd.io.enq.valid := io.saxi.writeData.valid
io.saxi.writeData.ready := in_q_wd.io.enq.ready
val out_q_rd_enq_valid = RegNext(false.B, init = false.B)
out_q_rd.io.enq.bits := read_reg
out_q_rd.io.enq.valid := out_q_rd_enq_valid
out_q_rd.io.deq.ready := io.saxi.readData.ready
io.saxi.readData.bits.data := out_q_rd.io.deq.bits.data
io.saxi.readData.bits.resp := out_q_rd.io.deq.bits.resp
io.saxi.readData.valid := out_q_rd.io.deq.valid
val out_q_wr_enq_valid = RegNext(false.B, init = false.B)
out_q_wr.io.enq.bits := resp_reg
out_q_wr.io.enq.valid := out_q_wr_enq_valid
out_q_wr.io.deq.ready := io.saxi.writeResp.ready
io.saxi.writeResp.valid := out_q_wr.io.deq.valid
io.saxi.writeResp.bits.bresp := out_q_wr.io.deq.bits
in_q_ra.io.deq.ready := out_q_rd.io.enq.ready
when (in_q_ra.io.deq.fire) {
val addr = in_q_ra.io.deq.bits
read_reg.resp := Response.slverr
for (off <- cfg.regs.keys.toList.sorted) {
when (addr === off.U) { cfg.regs(off).read() map { v =>
logger.info(p"reading from address 0x${Hexadecimal(addr)} ($addr) -> 0x${Hexadecimal(v)} ($v)")
read_reg.data := v
read_reg.resp := Response.okay
}}
}
out_q_rd_enq_valid := true.B
}
in_q_wa.io.deq.ready := in_q_wd.io.deq.valid && out_q_wr.io.enq.ready
in_q_wd.io.deq.ready := in_q_wa.io.deq.valid && out_q_wr.io.enq.ready
when (in_q_wa.io.deq.fire) {
val addr = in_q_wa.io.deq.bits
val v = in_q_wd.io.deq.bits
for (off <- cfg.regs.keys.toList.sorted) {
when (addr === off.U) {
val r = cfg.regs(off).write(v)
logger.info(p"writing to address 0x${Hexadecimal(addr)} ($addr) -> 0x${Hexadecimal(v)} ($v): 0x${Hexadecimal(r)} ($r)")
resp_reg := r
}
}
out_q_wr_enq_valid := true.B
}
}
def resetBehavior(io: RegisterFile.IO)(implicit module: Module) {
when (module.reset.toBool) { // this is required for AXI compliance; apparently Queues start working while reset is high
io.saxi.readAddr.ready := false.B
io.saxi.readData.valid := false.B
io.saxi.writeAddr.ready := false.B
io.saxi.writeData.ready := false.B
io.saxi.writeResp.valid := false.B
}
}
}
/**
......@@ -72,105 +161,9 @@ object RegisterFile {
class RegisterFile(cfg: RegisterFile.Configuration)
(implicit axi: Axi4Lite.Configuration,
logLevel: Logging.Level) extends Module with Logging {
class ReadData extends Bundle {
val data = io.saxi.readData.bits.data.cloneType
val resp = io.saxi.readData.bits.resp.cloneType
override def cloneType = (new ReadData).asInstanceOf[this.type]
}
implicit val logger: Logging = this
cinfo(s"AXI config: $axi")
val io = IO(new RegisterFile.IO(cfg))
// workaround: code below does not work due to optional elements in bundle
//val in_q_ra = Queue(io.saxi.readAddr, entries = cfg.fifoDepth, pipe = true)
val in_q_ra = Module(new Queue(io.saxi.readAddr.bits.addr.cloneType, entries = cfg.fifoDepth, pipe = true))
//val in_q_wa = Queue(io.saxi.writeAddr, entries = cfg.fifoDepth, pipe = true)
val in_q_wa = Module(new Queue(io.saxi.writeAddr.bits.addr.cloneType, entries = cfg.fifoDepth, pipe = true))
//val in_q_wd = Queue(io.saxi.writeData, entries = cfg.fifoDepth, pipe = true)
val in_q_wd = Module(new Queue(io.saxi.writeData.bits.data.cloneType, entries = cfg.fifoDepth, pipe = true))
val read_reg = Reg((new ReadData).cloneType)
val resp_reg = RegNext(Response.slverr, init = Response.slverr)
//val out_q_rd = Module(new Queue(new Axi4Lite.Data.Read, cfg.fifoDepth))
val out_q_rd = Module(new Queue((new ReadData).cloneType, cfg.fifoDepth))
//val out_q_wr = Module(new Queue(new Axi4Lite.WriteResponse, cfg.fifoDepth))
val out_q_wr = Module(new Queue(io.saxi.writeResp.bits.bresp.cloneType, cfg.fifoDepth))
/*when (in_q_ra.io.enq.fire) { info(p"received read address: 0x${Hexadecimal(in_q_ra.io.enq.bits)} (${in_q_ra.io.enq.bits})") }
when (in_q_wa.io.enq.fire) { info(p"received write address: 0x${Hexadecimal(in_q_wa.io.enq.bits)} (${in_q_wa.io.enq.bits})") }
when (in_q_wd.io.enq.fire) { info(p"received write data: 0x${Hexadecimal(in_q_wd.io.enq.bits)} (${in_q_wd.io.enq.bits})") }
when (out_q_rd.io.enq.fire) { info(p"enq read data: 0x${Hexadecimal(out_q_rd.io.enq.bits.data)} (${out_q_rd.io.enq.bits.data})") }
when (out_q_rd.io.deq.fire) { info(p"deq read data: 0x${Hexadecimal(out_q_rd.io.deq.bits.data)} (${out_q_rd.io.deq.bits.data})") }
when (out_q_wr.io.enq.fire) { info(p"enq write resp: 0x${Hexadecimal(out_q_wr.io.enq.bits)} (${out_q_wr.io.enq.bits})") }
when (out_q_wr.io.deq.fire) { info(p"deq write resp: 0x${Hexadecimal(out_q_wr.io.deq.bits)} (${out_q_wr.io.deq.bits})") }*/
io.saxi.readData.bits.defaults
io.saxi.readData.valid := false.B
io.saxi.writeResp.bits.defaults
io.saxi.writeResp.valid := false.B
in_q_ra.io.enq.bits := io.saxi.readAddr.bits.addr
in_q_ra.io.enq.valid := io.saxi.readAddr.valid
io.saxi.readAddr.ready := in_q_ra.io.enq.ready
in_q_wa.io.enq.bits := io.saxi.writeAddr.bits.addr
in_q_wa.io.enq.valid := io.saxi.writeAddr.valid
io.saxi.writeAddr.ready := in_q_wa.io.enq.ready
in_q_wd.io.enq.bits := io.saxi.writeData.bits.data
in_q_wd.io.enq.valid := io.saxi.writeData.valid
io.saxi.writeData.ready := in_q_wd.io.enq.ready
val out_q_rd_enq_valid = RegNext(false.B, init = false.B)
out_q_rd.io.enq.bits := read_reg
out_q_rd.io.enq.valid := out_q_rd_enq_valid
out_q_rd.io.deq.ready := io.saxi.readData.ready
io.saxi.readData.bits.data := out_q_rd.io.deq.bits.data
io.saxi.readData.bits.resp := out_q_rd.io.deq.bits.resp
io.saxi.readData.valid := out_q_rd.io.deq.valid
val out_q_wr_enq_valid = RegNext(false.B, init = false.B)
out_q_wr.io.enq.bits := resp_reg
out_q_wr.io.enq.valid := out_q_wr_enq_valid
out_q_wr.io.deq.ready := io.saxi.writeResp.ready
io.saxi.writeResp.valid := out_q_wr.io.deq.valid
io.saxi.writeResp.bits.bresp := out_q_wr.io.deq.bits
in_q_ra.io.deq.ready := out_q_rd.io.enq.ready
when (in_q_ra.io.deq.fire) {
val addr = in_q_ra.io.deq.bits
read_reg.resp := Response.slverr
for (off <- cfg.regs.keys.toList.sorted) {
when (addr === off.U) { cfg.regs(off).read() map { v =>
info(p"reading from address 0x${Hexadecimal(addr)} ($addr) -> 0x${Hexadecimal(v)} ($v)")
read_reg.data := v
read_reg.resp := Response.okay
}}
}
out_q_rd_enq_valid := true.B
}
in_q_wa.io.deq.ready := in_q_wd.io.deq.valid && out_q_wr.io.enq.ready
in_q_wd.io.deq.ready := in_q_wa.io.deq.valid && out_q_wr.io.enq.ready
when (in_q_wa.io.deq.fire) {
val addr = in_q_wa.io.deq.bits
val v = in_q_wd.io.deq.bits
for (off <- cfg.regs.keys.toList.sorted) {
when (addr === off.U) {
val r = cfg.regs(off).write(v)
info(p"writing to address 0x${Hexadecimal(addr)} ($addr) -> 0x${Hexadecimal(v)} ($v): 0x${Hexadecimal(r)} ($r)")
resp_reg := r
}
}
out_q_wr_enq_valid := true.B
}
when (reset.toBool) { // this is required for AXI compliance; apparently Queues start working while reset is high
io.saxi.readAddr.ready := false.B
io.saxi.readData.valid := false.B
io.saxi.writeAddr.ready := false.B
io.saxi.writeData.ready := false.B
io.saxi.writeResp.valid := false.B
}
RegisterFile.behavior(cfg, io)(axi, logger, logLevel)
RegisterFile.resetBehavior(io)(this)
}
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