riscv/rocket-chip
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Reg standardization

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This commit is contained in:
Henry Cook
2013-08-13 17:50:02 -07:00
parent 858169917e
commit b570435847
6 changed files with 45 additions and 58 deletions
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4
rocket/src/main/scala/core.scala
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@@ -42,7 +42,7 @@ class Core(implicit conf: RocketConfiguration) extends Module
} else null
if (conf.vec) {
val vu = Module(new vu(RegUpdate(this.getReset)))
val vu = Module(new vu(RegUpdate(reset)))
val vdtlb = Module(new TLB(8))
ptw += vdtlb.io.ptw
@@ -109,7 +109,7 @@ class Core(implicit conf: RocketConfiguration) extends Module
vu.io.xcpt.hold := ctrl.io.vec_iface.hold
// hooking up vector memory interface
dmem(2).req.bits.data := RegEn(StoreGen(vu.io.dmem_req.bits).data, vu.io.dmem_req.valid && isWrite(vu.io.dmem_req.bits.cmd))
dmem(2).req.bits.data := RegEnable(StoreGen(vu.io.dmem_req.bits).data, vu.io.dmem_req.valid && isWrite(vu.io.dmem_req.bits.cmd))
dmem(2).req <> vu.io.dmem_req
dmem(2).resp <> vu.io.dmem_resp

2
rocket/src/main/scala/ctrl.scala
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@@ -407,7 +407,7 @@ class Control(implicit conf: RocketConfiguration) extends Module
val wb_reg_div_mul_val = RegReset(Bool(false))
val take_pc = Bool()
val pc_taken = Reg(update = take_pc, reset = Bool(false))
val pc_taken = RegUpdate(take_pc, Bool(false))
val take_pc_wb = Bool()
val ctrl_killd = Bool()
val ctrl_killx = Bool()

2
rocket/src/main/scala/dpath_util.scala
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@@ -278,7 +278,7 @@ class PCR(implicit conf: RocketConfiguration) extends Module
io.host.ipi_rep.ready := Bool(true)
when (io.host.ipi_rep.valid) { r_irq_ipi := Bool(true) }
when(this.getReset) {
when(reset) {
reg_status.et := false
reg_status.ef := false
reg_status.ev := false

24
rocket/src/main/scala/fpu.scala
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@@ -451,23 +451,23 @@ class FPU(sfma_latency: Int, dfma_latency: Int) extends Module
when (io.ctrl.valid) {
ex_reg_inst := io.dpath.inst
}
val ex_reg_valid = Reg(update=io.ctrl.valid, reset=Bool(false))
val mem_reg_valid = Reg(update=ex_reg_valid && !io.ctrl.killx, reset=Bool(false))
val ex_reg_valid = Reg(updateData=io.ctrl.valid, resetData=Bool(false))
val mem_reg_valid = Reg(updateData=ex_reg_valid && !io.ctrl.killx, resetData=Bool(false))
val killm = io.ctrl.killm || io.ctrl.nack_mem
val wb_reg_valid = Reg(update=mem_reg_valid && !killm, reset=Bool(false))
val wb_reg_valid = Reg(updateData=mem_reg_valid && !killm, resetData=Bool(false))
val fp_decoder = Module(new FPUDecoder)
fp_decoder.io.inst := io.dpath.inst
val ctrl = RegEn(fp_decoder.io.sigs, io.ctrl.valid)
val mem_ctrl = RegEn(ctrl, ex_reg_valid)
val wb_ctrl = RegEn(mem_ctrl, mem_reg_valid)
val ctrl = RegEnable(fp_decoder.io.sigs, io.ctrl.valid)
val mem_ctrl = RegEnable(ctrl, ex_reg_valid)
val wb_ctrl = RegEnable(mem_ctrl, mem_reg_valid)
// load response
val load_wb = RegUpdate(io.dpath.dmem_resp_val)
val load_wb_single = RegEn(io.dpath.dmem_resp_type === MT_W || io.dpath.dmem_resp_type === MT_WU, io.dpath.dmem_resp_val)
val load_wb_data = RegEn(io.dpath.dmem_resp_data, io.dpath.dmem_resp_val)
val load_wb_tag = RegEn(io.dpath.dmem_resp_tag, io.dpath.dmem_resp_val)
val load_wb_single = RegEnable(io.dpath.dmem_resp_type === MT_W || io.dpath.dmem_resp_type === MT_WU, io.dpath.dmem_resp_val)
val load_wb_data = RegEnable(io.dpath.dmem_resp_data, io.dpath.dmem_resp_val)
val load_wb_tag = RegEnable(io.dpath.dmem_resp_tag, io.dpath.dmem_resp_val)
val rec_s = hardfloat.floatNToRecodedFloatN(load_wb_data, 23, 9)
val rec_d = hardfloat.floatNToRecodedFloatN(load_wb_data, 52, 12)
val load_wb_data_recoded = Mux(load_wb_single, Cat(SInt(-1), rec_s), rec_d)
@@ -576,15 +576,15 @@ class FPU(sfma_latency: Int, dfma_latency: Int) extends Module
val wexc = Vec(pipes.map(_.wexc))(wsrc)
when (wen(0)) { regfile(waddr(4,0)) := wdata }
val wb_toint_exc = RegEn(fpiu.io.out.bits.exc, mem_ctrl.toint)
val wb_toint_exc = RegEnable(fpiu.io.out.bits.exc, mem_ctrl.toint)
when (wb_reg_valid && wb_ctrl.toint || wen(0)) {
fsr_exc := fsr_exc |
Fill(fsr_exc.getWidth, wb_reg_valid && wb_ctrl.toint) & wb_toint_exc |
Fill(fsr_exc.getWidth, wen(0)) & wexc
}
val mem_fsr_wdata = RegEn(io.dpath.fromint_data(FSR_WIDTH-1,0), ex_reg_valid && ctrl.wrfsr)
val wb_fsr_wdata = RegEn(mem_fsr_wdata, mem_reg_valid && mem_ctrl.wrfsr)
val mem_fsr_wdata = RegEnable(io.dpath.fromint_data(FSR_WIDTH-1,0), ex_reg_valid && ctrl.wrfsr)
val wb_fsr_wdata = RegEnable(mem_fsr_wdata, mem_reg_valid && mem_ctrl.wrfsr)
when (wb_reg_valid && wb_ctrl.wrfsr) {
fsr_exc := wb_fsr_wdata
fsr_rm := wb_fsr_wdata >> fsr_exc.getWidth

69
rocket/src/main/scala/nbdcache.scala
View File

@@ -43,6 +43,11 @@ case class DCacheConfig(sets: Int, ways: Int,
val lrsc_cycles = 32 // ISA requires 16-insn LRSC sequences to succeed
}
abstract trait DCacheBundle extends Bundle {
implicit val conf: DCacheConfig
override def clone = this.getClass.getConstructors.head.newInstance(conf).asInstanceOf[this.type]
}
abstract class ReplacementPolicy
{
def way: UInt
@@ -102,30 +107,22 @@ class MSHRReq(implicit conf: DCacheConfig) extends HellaCacheReq {
val tag_match = Bool()
val old_meta = new MetaData
val way_en = Bits(width = conf.ways)
override def clone = new MSHRReq().asInstanceOf[this.type]
}
class Replay(implicit conf: DCacheConfig) extends HellaCacheReq {
val sdq_id = UInt(width = log2Up(conf.nsdq))
override def clone = new Replay().asInstanceOf[this.type]
}
class DataReadReq(implicit conf: DCacheConfig) extends Bundle {
class DataReadReq(implicit val conf: DCacheConfig) extends DCacheBundle {
val way_en = Bits(width = conf.ways)
val addr = Bits(width = conf.untagbits)
override def clone = new DataReadReq().asInstanceOf[this.type]
}
class DataWriteReq(implicit conf: DCacheConfig) extends Bundle {
class DataWriteReq(implicit val conf: DCacheConfig) extends DCacheBundle {
val way_en = Bits(width = conf.ways)
val addr = Bits(width = conf.untagbits)
val wmask = Bits(width = conf.wordsperrow)
val data = Bits(width = conf.bitsperrow)
override def clone = new DataWriteReq().asInstanceOf[this.type]
}
class InternalProbe(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends Probe {
@@ -152,25 +149,19 @@ object MetaData {
meta
}
}
class MetaData(implicit conf: DCacheConfig) extends Bundle {
class MetaData(implicit val conf: DCacheConfig) extends DCacheBundle {
val state = UInt(width = conf.statebits)
val tag = Bits(width = conf.tagbits)
override def clone = new MetaData().asInstanceOf[this.type]
}
class MetaReadReq(implicit conf: DCacheConfig) extends Bundle {
class MetaReadReq(implicit val conf: DCacheConfig) extends DCacheBundle {
val addr = UInt(width = conf.paddrbits)
override def clone = new MetaReadReq().asInstanceOf[this.type]
}
class MetaWriteReq(implicit conf: DCacheConfig) extends Bundle {
class MetaWriteReq(implicit val conf: DCacheConfig) extends DCacheBundle {
val way_en = Bits(width = conf.ways)
val idx = Bits(width = conf.idxbits)
val data = new MetaData()
override def clone = new MetaWriteReq().asInstanceOf[this.type]
}
class MSHR(id: Int)(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends Module {
@@ -420,7 +411,7 @@ class MSHRFile(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends M
io.mem_resp := memRespMux(io.mem_grant.bits.payload.client_xact_id)
val free_sdq = io.replay.fire() && isWrite(io.replay.bits.cmd)
io.replay.bits.data := sdq(RegEn(replay_arb.io.out.bits.sdq_id, free_sdq))
io.replay.bits.data := sdq(RegEnable(replay_arb.io.out.bits.sdq_id, free_sdq))
io.replay <> replay_arb.io.out
when (io.replay.valid || sdq_enq) {
@@ -597,7 +588,7 @@ class MetaDataArray(implicit conf: DCacheConfig, tl: TileLinkConfiguration) exte
val mask = Mux(rst, SInt(-1), io.write.bits.way_en)
tags.write(addr, Fill(conf.ways, data), FillInterleaved(metabits, mask))
}
val tag = tags(RegEn(io.read.bits.addr >> conf.offbits, io.read.valid))
val tag = tags(RegEnable(io.read.bits.addr >> conf.offbits, io.read.valid))
for (w <- 0 until conf.ways) {
val m = tag(metabits*(w+1)-1, metabits*w)
@@ -624,7 +615,7 @@ class DataArray(implicit conf: DCacheConfig) extends Module {
val wway_en = io.write.bits.way_en(w+conf.wordsperrow-1,w)
val rway_en = io.read.bits.way_en(w+conf.wordsperrow-1,w)
val resp = Vec.fill(conf.wordsperrow){Bits(width = conf.bitsperrow)}
val r_raddr = RegEn(io.read.bits.addr, io.read.valid)
val r_raddr = RegEnable(io.read.bits.addr, io.read.valid)
for (p <- 0 until resp.size) {
val array = Mem(Bits(width=conf.bitsperrow), conf.sets*REFILL_CYCLES, seqRead = true)
when (wway_en.orR && io.write.valid && io.write.bits.wmask(p)) {
@@ -632,7 +623,7 @@ class DataArray(implicit conf: DCacheConfig) extends Module {
val mask = FillInterleaved(conf.encdatabits, wway_en)
array.write(waddr, data, mask)
}
resp(p) := array(RegEn(raddr, rway_en.orR && io.read.valid))
resp(p) := array(RegEnable(raddr, rway_en.orR && io.read.valid))
}
for (dw <- 0 until conf.wordsperrow) {
val r = AVec(resp.map(_(conf.encdatabits*(dw+1)-1,conf.encdatabits*dw)))
@@ -649,7 +640,7 @@ class DataArray(implicit conf: DCacheConfig) extends Module {
when (io.write.bits.way_en(w) && io.write.valid) {
array.write(waddr, io.write.bits.data, wmask)
}
io.resp(w) := array(RegEn(raddr, io.read.bits.way_en(w) && io.read.valid))
io.resp(w) := array(RegEnable(raddr, io.read.bits.way_en(w) && io.read.valid))
}
}
@@ -695,7 +686,7 @@ class AMOALU(implicit conf: DCacheConfig) extends Module {
io.out := wmask & out | ~wmask & io.lhs
}
class HellaCacheReq(implicit conf: DCacheConfig) extends Bundle {
class HellaCacheReq(implicit val conf: DCacheConfig) extends DCacheBundle {
val kill = Bool()
val typ = Bits(width = 3)
val phys = Bool()
@@ -703,11 +694,9 @@ class HellaCacheReq(implicit conf: DCacheConfig) extends Bundle {
val data = Bits(width = conf.databits)
val tag = Bits(width = conf.reqtagbits)
val cmd = Bits(width = 4)
override def clone = new HellaCacheReq().asInstanceOf[this.type]
}
class HellaCacheResp(implicit conf: DCacheConfig) extends Bundle {
class HellaCacheResp(implicit val conf: DCacheConfig) extends DCacheBundle {
val nack = Bool() // comes 2 cycles after req.fire
val replay = Bool()
val typ = Bits(width = 3)
@@ -717,8 +706,6 @@ class HellaCacheResp(implicit conf: DCacheConfig) extends Bundle {
val cmd = Bits(width = 4)
val addr = UInt(width = conf.maxaddrbits)
val store_data = Bits(width = conf.databits)
override def clone = new HellaCacheResp().asInstanceOf[this.type]
}
class AlignmentExceptions extends Bundle {
@@ -756,15 +743,15 @@ class HellaCache(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends
val mshrs = Module(new MSHRFile)
io.cpu.req.ready := Bool(true)
val s1_valid = Reg(update=io.cpu.req.fire(), reset=Bool(false))
val s1_valid = Reg(updateData=io.cpu.req.fire(), resetData=Bool(false))
val s1_req = Reg(io.cpu.req.bits.clone)
val s1_valid_masked = s1_valid && !io.cpu.req.bits.kill
val s1_replay = RegReset(Bool(false))
val s1_clk_en = Reg(Bool())
val s2_valid = Reg(update=s1_valid_masked, reset=Bool(false))
val s2_valid = Reg(updateData=s1_valid_masked, resetData=Bool(false))
val s2_req = Reg(io.cpu.req.bits.clone)
val s2_replay = Reg(update=s1_replay, reset=Bool(false))
val s2_replay = Reg(updateData=s1_replay, resetData=Bool(false))
val s2_recycle = Bool()
val s2_valid_masked = Bool()
@@ -772,7 +759,7 @@ class HellaCache(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends
val s3_req = Reg(io.cpu.req.bits.clone)
val s3_way = Reg(Bits())
val s1_recycled = RegEn(s2_recycle, s1_clk_en)
val s1_recycled = RegEnable(s2_recycle, s1_clk_en)
val s1_read = isRead(s1_req.cmd)
val s1_write = isWrite(s1_req.cmd)
val s1_readwrite = s1_read || s1_write || isPrefetch(s1_req.cmd)
@@ -872,9 +859,9 @@ class HellaCache(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends
val s1_tag_match_way = wayMap((w: Int) => s1_tag_eq_way(w) && tl.co.isValid(meta.io.resp(w).state)).toBits
s1_clk_en := metaReadArb.io.out.valid
val s1_writeback = s1_clk_en && !s1_valid && !s1_replay
val s2_tag_match_way = RegEn(s1_tag_match_way, s1_clk_en)
val s2_tag_match_way = RegEnable(s1_tag_match_way, s1_clk_en)
val s2_tag_match = s2_tag_match_way.orR
val s2_hit_state = Mux1H(s2_tag_match_way, wayMap((w: Int) => RegEn(meta.io.resp(w).state, s1_clk_en)))
val s2_hit_state = Mux1H(s2_tag_match_way, wayMap((w: Int) => RegEnable(meta.io.resp(w).state, s1_clk_en)))
val s2_hit = s2_tag_match && tl.co.isHit(s2_req.cmd, s2_hit_state) && s2_hit_state === tl.co.newStateOnHit(s2_req.cmd, s2_hit_state)
// load-reserved/store-conditional
@@ -931,8 +918,8 @@ class HellaCache(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends
// replacement policy
val replacer = new RandomReplacement
val s1_replaced_way_en = UIntToOH(replacer.way)
val s2_replaced_way_en = UIntToOH(RegEn(replacer.way, s1_clk_en))
val s2_repl_meta = Mux1H(s2_replaced_way_en, wayMap((w: Int) => RegEn(meta.io.resp(w), s1_clk_en && s1_replaced_way_en(w))).toSeq)
val s2_replaced_way_en = UIntToOH(RegEnable(replacer.way, s1_clk_en))
val s2_repl_meta = Mux1H(s2_replaced_way_en, wayMap((w: Int) => RegEnable(meta.io.resp(w), s1_clk_en && s1_replaced_way_en(w))).toSeq)
// miss handling
mshrs.io.req.valid := s2_valid_masked && !s2_hit && (isPrefetch(s2_req.cmd) || isRead(s2_req.cmd) || isWrite(s2_req.cmd))
@@ -993,8 +980,8 @@ class HellaCache(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends
FIFOedLogicalNetworkIOWrapper(wb.io.release_data) <> io.mem.release.data
// store->load bypassing
val s4_valid = Reg(update=s3_valid, reset=Bool(false))
val s4_req = RegEn(s3_req, s3_valid && metaReadArb.io.out.valid)
val s4_valid = Reg(updateData=s3_valid, resetData=Bool(false))
val s4_req = RegEnable(s3_req, s3_valid && metaReadArb.io.out.valid)
val bypasses = List(
((s2_valid_masked || s2_replay) && !s2_sc_fail, s2_req, amoalu.io.out),
(s3_valid, s3_req, s3_req.data),
@@ -1022,7 +1009,7 @@ class HellaCache(implicit conf: DCacheConfig, tl: TileLinkConfiguration) extends
// nack it like it's hot
val s1_nack = dtlb.io.req.valid && dtlb.io.resp.miss ||
s1_req.addr(indexmsb,indexlsb) === prober.io.meta_write.bits.idx && !prober.io.req.ready
val s2_nack_hit = RegEn(s1_nack, s1_valid || s1_replay)
val s2_nack_hit = RegEnable(s1_nack, s1_valid || s1_replay)
when (s2_nack_hit) { mshrs.io.req.valid := Bool(false) }
val s2_nack_victim = s2_hit && mshrs.io.secondary_miss
val s2_nack_miss = !s2_hit && !mshrs.io.req.ready

2
rocket/src/main/scala/tile.scala
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@@ -19,7 +19,7 @@ case class RocketConfiguration(tl: TileLinkConfiguration,
if (fastLoadByte) require(fastLoadWord)
}
class Tile(resetSignal: Bool = null)(confIn: RocketConfiguration) extends Module(reset = resetSignal) with ClientCoherenceAgent
class Tile(_reset: Bool = null)(confIn: RocketConfiguration) extends Module(_reset = _reset) with ClientCoherenceAgent
{
val memPorts = 2 + confIn.vec
val dcachePortId = 0