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feat: 修改并成功生成无cache的axi

This commit is contained in:
Liphen 2023-11-13 17:56:41 +08:00
parent 347def990a
commit f229789a12
9 changed files with 193 additions and 240 deletions
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278
chisel/playground/src/Core.scala
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@ -1,161 +1,161 @@
package cpu // package cpu
import chisel3._ // import chisel3._
import chisel3.util._ // import chisel3.util._
import chisel3.internal.DontCareBinding // import chisel3.internal.DontCareBinding
import defines._ // import defines._
import defines.Const._ // import defines.Const._
import pipeline.fetch._ // import pipeline.fetch._
import pipeline.decoder._ // import pipeline.decoder._
import pipeline.execute._ // import pipeline.execute._
import pipeline.memory._ // import pipeline.memory._
import pipeline.writeback._ // import pipeline.writeback._
import ctrl._ // import ctrl._
import mmu._ // import mmu._
import chisel3.util.experimental.decode.decoder // import chisel3.util.experimental.decode.decoder
import cpu.pipeline.fetch.InstFifo // import cpu.pipeline.fetch.InstFifo
class Core(implicit val config: CpuConfig) extends Module { // class Core(implicit val config: CpuConfig) extends Module {
val io = IO(new Bundle { // val io = IO(new Bundle {
val ext_int = Input(UInt(6.W)) // val ext_int = Input(UInt(6.W))
val inst = new Cache_ICache() // val inst = new Cache_ICache()
val data = new Cache_DCache() // val data = new Cache_DCache()
val debug = new DEBUG() // val debug = new DEBUG()
val statistic = if (!config.build) Some(new CPUStatistic()) else None // val statistic = if (!config.build) Some(new CPUStatistic()) else None
}) // })
val ctrl = Module(new Ctrl()).io // val ctrl = Module(new Ctrl()).io
val fetchUnit = Module(new FetchUnit()).io // val fetchUnit = Module(new FetchUnit()).io
val bpu = Module(new BranchPredictorUnit()).io // val bpu = Module(new BranchPredictorUnit()).io
val instFifo = Module(new InstFifo()).io // val instFifo = Module(new InstFifo()).io
val decoderUnit = Module(new DecoderUnit()).io // val decoderUnit = Module(new DecoderUnit()).io
val regfile = Module(new ARegFile()).io // val regfile = Module(new ARegFile()).io
val executeStage = Module(new ExecuteStage()).io // val executeStage = Module(new ExecuteStage()).io
val executeUnit = Module(new ExecuteUnit()).io // val executeUnit = Module(new ExecuteUnit()).io
val cp0 = Module(new Cp0()).io // val cp0 = Module(new Cp0()).io
val memoryStage = Module(new MemoryStage()).io // val memoryStage = Module(new MemoryStage()).io
val memoryUnit = Module(new MemoryUnit()).io // val memoryUnit = Module(new MemoryUnit()).io
val writeBackStage = Module(new WriteBackStage()).io // val writeBackStage = Module(new WriteBackStage()).io
val writeBackUnit = Module(new WriteBackUnit()).io // val writeBackUnit = Module(new WriteBackUnit()).io
ctrl.instFifo.has2insts := !(instFifo.empty || instFifo.almost_empty) // ctrl.instFifo.has2insts := !(instFifo.empty || instFifo.almost_empty)
ctrl.decoderUnit <> decoderUnit.ctrl // ctrl.decoderUnit <> decoderUnit.ctrl
ctrl.executeUnit <> executeUnit.ctrl // ctrl.executeUnit <> executeUnit.ctrl
ctrl.memoryUnit <> memoryUnit.ctrl // ctrl.memoryUnit <> memoryUnit.ctrl
ctrl.writeBackUnit <> writeBackUnit.ctrl // ctrl.writeBackUnit <> writeBackUnit.ctrl
ctrl.cacheCtrl.iCache_stall := io.inst.icache_stall // ctrl.cacheCtrl.iCache_stall := io.inst.icache_stall
ctrl.cacheCtrl.dCache_stall := io.data.dcache_stall // ctrl.cacheCtrl.dCache_stall := io.data.dcache_stall
fetchUnit.memory <> memoryUnit.fetchUnit // fetchUnit.memory <> memoryUnit.fetchUnit
fetchUnit.execute <> executeUnit.fetchUnit // fetchUnit.execute <> executeUnit.fetchUnit
fetchUnit.decoder <> decoderUnit.fetchUnit // fetchUnit.decoder <> decoderUnit.fetchUnit
fetchUnit.instFifo.full := instFifo.full // fetchUnit.instFifo.full := instFifo.full
fetchUnit.iCache.inst_valid := io.inst.inst_valid // fetchUnit.iCache.inst_valid := io.inst.inst_valid
io.inst.addr(0) := fetchUnit.iCache.pc // io.inst.addr(0) := fetchUnit.iCache.pc
io.inst.addr(1) := fetchUnit.iCache.pc_next // io.inst.addr(1) := fetchUnit.iCache.pc_next
for (i <- 2 until config.instFetchNum) { // for (i <- 2 until config.instFetchNum) {
io.inst.addr(i) := fetchUnit.iCache.pc_next + ((i - 1) * 4).U // io.inst.addr(i) := fetchUnit.iCache.pc_next + ((i - 1) * 4).U
} // }
bpu.decoder.ena := ctrl.decoderUnit.allow_to_go // bpu.decoder.ena := ctrl.decoderUnit.allow_to_go
bpu.decoder.op := decoderUnit.bpu.decoded_inst0.op // bpu.decoder.op := decoderUnit.bpu.decoded_inst0.op
bpu.decoder.inst := decoderUnit.bpu.decoded_inst0.inst // bpu.decoder.inst := decoderUnit.bpu.decoded_inst0.inst
bpu.decoder.rs1 := decoderUnit.bpu.decoded_inst0.reg1_raddr // bpu.decoder.rs1 := decoderUnit.bpu.decoded_inst0.reg1_raddr
bpu.decoder.rs2 := decoderUnit.bpu.decoded_inst0.reg2_raddr // bpu.decoder.rs2 := decoderUnit.bpu.decoded_inst0.reg2_raddr
bpu.decoder.pc := decoderUnit.bpu.pc // bpu.decoder.pc := decoderUnit.bpu.pc
bpu.decoder.pc_plus4 := decoderUnit.bpu.pc + 4.U // bpu.decoder.pc_plus4 := decoderUnit.bpu.pc + 4.U
bpu.decoder.pht_index := decoderUnit.bpu.pht_index // bpu.decoder.pht_index := decoderUnit.bpu.pht_index
decoderUnit.bpu.update_pht_index := bpu.decoder.update_pht_index // decoderUnit.bpu.update_pht_index := bpu.decoder.update_pht_index
bpu.execute <> executeUnit.bpu // bpu.execute <> executeUnit.bpu
if (config.branchPredictor == "pesudo") { // if (config.branchPredictor == "pesudo") {
bpu.regfile.get <> regfile.bpu.get // bpu.regfile.get <> regfile.bpu.get
} // }
decoderUnit.bpu.branch_inst := bpu.decoder.branch_inst // decoderUnit.bpu.branch_inst := bpu.decoder.branch_inst
decoderUnit.bpu.pred_branch := bpu.decoder.pred_branch // decoderUnit.bpu.pred_branch := bpu.decoder.pred_branch
decoderUnit.bpu.branch_target := bpu.decoder.branch_target // decoderUnit.bpu.branch_target := bpu.decoder.branch_target
instFifo.do_flush := ctrl.decoderUnit.do_flush // instFifo.do_flush := ctrl.decoderUnit.do_flush
instFifo.icache_stall := io.inst.icache_stall // instFifo.icache_stall := io.inst.icache_stall
instFifo.jump_branch_inst := decoderUnit.instFifo.jump_branch_inst // instFifo.jump_branch_inst := decoderUnit.instFifo.jump_branch_inst
instFifo.ren <> decoderUnit.instFifo.allow_to_go // instFifo.ren <> decoderUnit.instFifo.allow_to_go
decoderUnit.instFifo.inst <> instFifo.read // decoderUnit.instFifo.inst <> instFifo.read
for (i <- 0 until config.instFetchNum) { // for (i <- 0 until config.instFetchNum) {
instFifo.write(i).pht_index := bpu.instBuffer.pht_index(i) // instFifo.write(i).pht_index := bpu.instBuffer.pht_index(i)
bpu.instBuffer.pc(i) := instFifo.write(i).pc // bpu.instBuffer.pc(i) := instFifo.write(i).pc
instFifo.wen(i) := io.inst.inst_valid(i) // instFifo.wen(i) := io.inst.inst_valid(i)
instFifo.write(i).pc := io.inst.addr(0) + (i * 4).U // instFifo.write(i).pc := io.inst.addr(0) + (i * 4).U
instFifo.write(i).inst := io.inst.inst(i) // instFifo.write(i).inst := io.inst.inst(i)
} // }
decoderUnit.instFifo.info.empty := instFifo.empty // decoderUnit.instFifo.info.empty := instFifo.empty
decoderUnit.instFifo.info.almost_empty := instFifo.almost_empty // decoderUnit.instFifo.info.almost_empty := instFifo.almost_empty
decoderUnit.regfile <> regfile.read // decoderUnit.regfile <> regfile.read
for (i <- 0 until (config.fuNum)) { // for (i <- 0 until (config.fuNum)) {
decoderUnit.forward(i).exe := executeUnit.decoderUnit.forward(i).exe // decoderUnit.forward(i).exe := executeUnit.decoderUnit.forward(i).exe
decoderUnit.forward(i).mem_wreg := executeUnit.decoderUnit.forward(i).exe_mem_wreg // decoderUnit.forward(i).mem_wreg := executeUnit.decoderUnit.forward(i).exe_mem_wreg
decoderUnit.forward(i).mem := memoryUnit.decoderUnit(i) // decoderUnit.forward(i).mem := memoryUnit.decoderUnit(i)
} // }
decoderUnit.cp0 <> cp0.decoderUnit // decoderUnit.cp0 <> cp0.decoderUnit
decoderUnit.executeStage <> executeStage.decoderUnit // decoderUnit.executeStage <> executeStage.decoderUnit
executeStage.ctrl.clear(0) := ctrl.memoryUnit.flush_req || // executeStage.ctrl.clear(0) := ctrl.memoryUnit.flush_req ||
!decoderUnit.executeStage.inst0.ex.bd && ctrl.executeUnit.do_flush && ctrl.executeUnit.allow_to_go || // !decoderUnit.executeStage.inst0.ex.bd && ctrl.executeUnit.do_flush && ctrl.executeUnit.allow_to_go ||
!ctrl.decoderUnit.allow_to_go && ctrl.executeUnit.allow_to_go // !ctrl.decoderUnit.allow_to_go && ctrl.executeUnit.allow_to_go
executeStage.ctrl.clear(1) := ctrl.memoryUnit.flush_req || // executeStage.ctrl.clear(1) := ctrl.memoryUnit.flush_req ||
(ctrl.executeUnit.do_flush && decoderUnit.executeStage.inst1.allow_to_go) || // (ctrl.executeUnit.do_flush && decoderUnit.executeStage.inst1.allow_to_go) ||
(ctrl.executeUnit.allow_to_go && !decoderUnit.executeStage.inst1.allow_to_go) // (ctrl.executeUnit.allow_to_go && !decoderUnit.executeStage.inst1.allow_to_go)
executeStage.ctrl.inst0_allow_to_go := ctrl.executeUnit.allow_to_go // executeStage.ctrl.inst0_allow_to_go := ctrl.executeUnit.allow_to_go
executeUnit.decoderUnit.inst0_bd := decoderUnit.executeStage.inst0.ex.bd // executeUnit.decoderUnit.inst0_bd := decoderUnit.executeStage.inst0.ex.bd
executeUnit.executeStage <> executeStage.executeUnit // executeUnit.executeStage <> executeStage.executeUnit
executeUnit.cp0 <> cp0.executeUnit // executeUnit.cp0 <> cp0.executeUnit
executeUnit.memoryStage <> memoryStage.executeUnit // executeUnit.memoryStage <> memoryStage.executeUnit
cp0.ctrl.exe_stall := !ctrl.executeUnit.allow_to_go // cp0.ctrl.exe_stall := !ctrl.executeUnit.allow_to_go
cp0.ctrl.mem_stall := !ctrl.memoryUnit.allow_to_go // cp0.ctrl.mem_stall := !ctrl.memoryUnit.allow_to_go
cp0.ext_int := io.ext_int // cp0.ext_int := io.ext_int
memoryStage.ctrl.allow_to_go := ctrl.memoryUnit.allow_to_go // memoryStage.ctrl.allow_to_go := ctrl.memoryUnit.allow_to_go
memoryStage.ctrl.clear := ctrl.memoryUnit.do_flush // memoryStage.ctrl.clear := ctrl.memoryUnit.do_flush
memoryUnit.memoryStage <> memoryStage.memoryUnit // memoryUnit.memoryStage <> memoryStage.memoryUnit
memoryUnit.cp0 <> cp0.memoryUnit // memoryUnit.cp0 <> cp0.memoryUnit
memoryUnit.writeBackStage <> writeBackStage.memoryUnit // memoryUnit.writeBackStage <> writeBackStage.memoryUnit
memoryUnit.dataMemory.in.rdata := io.data.rdata // memoryUnit.dataMemory.in.rdata := io.data.rdata
io.data.en := memoryUnit.dataMemory.out.en // io.data.en := memoryUnit.dataMemory.out.en
io.data.rlen := memoryUnit.dataMemory.out.rlen // io.data.rlen := memoryUnit.dataMemory.out.rlen
io.data.wen := memoryUnit.dataMemory.out.wen // io.data.wen := memoryUnit.dataMemory.out.wen
io.data.wdata := memoryUnit.dataMemory.out.wdata // io.data.wdata := memoryUnit.dataMemory.out.wdata
io.data.addr := memoryUnit.dataMemory.out.addr // io.data.addr := memoryUnit.dataMemory.out.addr
writeBackStage.memoryUnit <> memoryUnit.writeBackStage // writeBackStage.memoryUnit <> memoryUnit.writeBackStage
writeBackStage.ctrl.allow_to_go := ctrl.writeBackUnit.allow_to_go // writeBackStage.ctrl.allow_to_go := ctrl.writeBackUnit.allow_to_go
writeBackStage.ctrl.clear := ctrl.writeBackUnit.do_flush // writeBackStage.ctrl.clear := ctrl.writeBackUnit.do_flush
writeBackUnit.writeBackStage <> writeBackStage.writeBackUnit // writeBackUnit.writeBackStage <> writeBackStage.writeBackUnit
writeBackUnit.ctrl <> ctrl.writeBackUnit // writeBackUnit.ctrl <> ctrl.writeBackUnit
regfile.write <> writeBackUnit.regfile // regfile.write <> writeBackUnit.regfile
io.debug <> writeBackUnit.debug // io.debug <> writeBackUnit.debug
io.inst.fence := executeUnit.executeStage.inst0.inst_info.ifence // io.inst.fence := executeUnit.executeStage.inst0.inst_info.ifence
io.inst.fence_addr := executeUnit.executeStage.inst0.inst_info.mem_addr // io.inst.fence_addr := executeUnit.executeStage.inst0.inst_info.mem_addr
io.data.fence := memoryUnit.memoryStage.inst0.inst_info.dfence // io.data.fence := memoryUnit.memoryStage.inst0.inst_info.dfence
io.data.fence_addr := memoryUnit.memoryStage.inst0.inst_info.mem_addr // io.data.fence_addr := memoryUnit.memoryStage.inst0.inst_info.mem_addr
io.data.execute_addr := executeUnit.memoryStage.inst0.mem.addr // io.data.execute_addr := executeUnit.memoryStage.inst0.mem.addr
io.inst.req := !instFifo.full // io.inst.req := !instFifo.full
io.inst.cpu_stall := !ctrl.fetchUnit.allow_to_go // io.inst.cpu_stall := !ctrl.fetchUnit.allow_to_go
io.data.cpu_stall := !ctrl.memoryUnit.allow_to_go // io.data.cpu_stall := !ctrl.memoryUnit.allow_to_go
// ===----------------------------------------------------------------=== // // ===----------------------------------------------------------------===
// statistic // // statistic
// ===----------------------------------------------------------------=== // // ===----------------------------------------------------------------===
if (!config.build) { // if (!config.build) {
io.statistic.get.soc <> writeBackUnit.statistic.get // io.statistic.get.soc <> writeBackUnit.statistic.get
io.statistic.get.bpu <> executeUnit.statistic.get // io.statistic.get.bpu <> executeUnit.statistic.get
} // }
} // }

8
chisel/playground/src/PuaMips.scala
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@ -21,12 +21,4 @@ class PuaMips extends Module {
io.ext_int <> core.io.ext_int io.ext_int <> core.io.ext_int
io.debug <> core.io.debug io.debug <> core.io.debug
io.axi <> cache.io.axi io.axi <> cache.io.axi
// ===----------------------------------------------------------------===
// statistic
// ===----------------------------------------------------------------===
if (!config.build) {
io.statistic.get.cpu <> core.io.statistic.get
io.statistic.get.cache <> cache.io.statistic.get
}
} }

16
chisel/playground/src/cache/Cache.scala vendored
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@ -3,7 +3,6 @@ package cache
import chisel3._ import chisel3._
import chisel3.util._ import chisel3.util._
import cpu.defines._ import cpu.defines._
import cpu.CacheConfig
import cpu.CpuConfig import cpu.CpuConfig
class Cache(implicit config: CpuConfig) extends Module { class Cache(implicit config: CpuConfig) extends Module {
@ -11,13 +10,10 @@ class Cache(implicit config: CpuConfig) extends Module {
val inst = Flipped(new Cache_ICache()) val inst = Flipped(new Cache_ICache())
val data = Flipped(new Cache_DCache()) val data = Flipped(new Cache_DCache())
val axi = new AXI() val axi = new AXI()
val statistic = if (!config.build) Some(new CacheStatistic()) else None
}) })
implicit val iCacheConfig = CacheConfig(nset = 64, nbank = 4, bankWidth = 16)
implicit val dCacheConfig = CacheConfig(nset = 128, bankWidth = 4)
val icache = Module(new ICache(iCacheConfig)) val icache = Module(new ICache())
val dcache = Module(new DCache(dCacheConfig)) val dcache = Module(new DCache())
val axi_interface = Module(new CacheAXIInterface()) val axi_interface = Module(new CacheAXIInterface())
icache.io.axi <> axi_interface.io.icache icache.io.axi <> axi_interface.io.icache
@ -26,12 +22,4 @@ class Cache(implicit config: CpuConfig) extends Module {
io.inst <> icache.io.cpu io.inst <> icache.io.cpu
io.data <> dcache.io.cpu io.data <> dcache.io.cpu
io.axi <> axi_interface.io.axi io.axi <> axi_interface.io.axi
// ===----------------------------------------------------------------===
// statistic
// ===----------------------------------------------------------------===
if (!config.build) {
io.statistic.get.icache <> icache.io.statistic.get
io.statistic.get.dcache <> dcache.io.statistic.get
}
} }

2
chisel/playground/src/cache/CacheAXIInterface.scala vendored
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@ -44,7 +44,7 @@ class CacheAXIInterface extends Module {
// we need to lock ar to avoid signals change during handshake // we need to lock ar to avoid signals change during handshake
val ar_sel_lock = RegInit(false.B) val ar_sel_lock = RegInit(false.B)
val ar_sel_val = RegInit(false.B) val ar_sel_val = RegInit(false.B)
val ar_sel = Mux(ar_sel_lock, ar_sel_val, io.dcache.ar.valid) val ar_sel = Mux(ar_sel_lock, ar_sel_val, !io.icache.ar.valid && io.dcache.ar.valid)
when(io.axi.ar.valid) { when(io.axi.ar.valid) {
when(io.axi.ar.ready) { when(io.axi.ar.ready) {

24
chisel/playground/src/cache/DCache.scala vendored
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@ -9,7 +9,7 @@ import cpu.defines._
import cpu.CpuConfig import cpu.CpuConfig
import cpu.defines.Const._ import cpu.defines.Const._
class DCache(cacheConfig: CacheConfig)(implicit config: CpuConfig) extends Module { class DCache(implicit config: CpuConfig) extends Module {
val io = IO(new Bundle { val io = IO(new Bundle {
val cpu = Flipped(new Cache_DCache()) val cpu = Flipped(new Cache_DCache())
val axi = new DCache_AXIInterface() val axi = new DCache_AXIInterface()
@ -34,24 +34,36 @@ class DCache(cacheConfig: CacheConfig)(implicit config: CpuConfig) extends Modul
val addr_err = io.cpu.addr(63, 32).orR val addr_err = io.cpu.addr(63, 32).orR
// default // default
io.axi.aw.id := 1.U
io.axi.aw.addr := 0.U io.axi.aw.addr := 0.U
io.axi.aw.len := 0.U io.axi.aw.len := 0.U
io.axi.aw.size := 0.U io.axi.aw.size := 0.U
io.axi.aw.burst := BURST_FIXED.U io.axi.aw.burst := BURST_FIXED.U
io.axi.aw.valid := 0.U io.axi.aw.valid := 0.U
io.axi.aw.prot := 0.U
io.axi.aw.lock := 0.U
io.axi.aw.cache := 0.U
io.axi.w.id := 1.U
io.axi.w.data := 0.U io.axi.w.data := 0.U
io.axi.w.strb := 0.U io.axi.w.strb := 0.U
io.axi.w.last := 1.U io.axi.w.last := 1.U
io.axi.w.valid := 0.U io.axi.w.valid := 0.U
io.axi.b.ready := 1.U io.axi.b.ready := 1.U
io.axi.ar.id := 1.U
io.axi.ar.addr := 0.U io.axi.ar.addr := 0.U
io.axi.ar.len := 0.U io.axi.ar.len := 0.U
io.axi.ar.size := 0.U io.axi.ar.size := 0.U
io.axi.ar.burst := BURST_FIXED.U io.axi.ar.burst := BURST_FIXED.U
io.axi.ar.valid := 0.U val arvalid = RegInit(false.B)
io.axi.r.ready := 1.U io.axi.ar.valid := arvalid
io.axi.ar.prot := 0.U
io.axi.ar.cache := 0.U
io.axi.ar.lock := 0.U
io.axi.r.ready := true.B
io.cpu.rdata := 0.U io.cpu.rdata := 0.U
io.cpu.acc_err := false.B
switch(status) { switch(status) {
is(s_idle) { is(s_idle) {
when(io.cpu.en) { when(io.cpu.en) {
@ -70,7 +82,7 @@ class DCache(cacheConfig: CacheConfig)(implicit config: CpuConfig) extends Modul
}.otherwise { }.otherwise {
io.axi.ar.addr := io.cpu.addr(31, 0) io.axi.ar.addr := io.cpu.addr(31, 0)
io.axi.ar.size := Cat(false.B, io.cpu.size) io.axi.ar.size := Cat(false.B, io.cpu.size)
io.axi.ar.valid := true.B arvalid := true.B
status := s_read status := s_read
} }
} }
@ -78,7 +90,7 @@ class DCache(cacheConfig: CacheConfig)(implicit config: CpuConfig) extends Modul
} }
is(s_read) { is(s_read) {
when(io.axi.ar.ready) { when(io.axi.ar.ready) {
io.axi.ar.valid := false.B arvalid := false.B
} }
when(io.axi.r.valid) { when(io.axi.r.valid) {
io.cpu.rdata := io.axi.r.data io.cpu.rdata := io.axi.r.data
@ -117,7 +129,7 @@ class DCache(cacheConfig: CacheConfig)(implicit config: CpuConfig) extends Modul
}.otherwise { }.otherwise {
io.axi.ar.addr := io.cpu.addr(31, 0) io.axi.ar.addr := io.cpu.addr(31, 0)
io.axi.ar.size := Cat(false.B, io.cpu.size) io.axi.ar.size := Cat(false.B, io.cpu.size)
io.axi.ar.valid := true.B arvalid := true.B
status := s_read status := s_read
} }
} }

13
chisel/playground/src/cache/ICache.scala vendored
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@ -21,11 +21,16 @@ class ICache(implicit config: CpuConfig) extends Module {
val addr_err = io.cpu.addr.orR val addr_err = io.cpu.addr.orR
// default // default
io.axi.ar.id := 0.U
io.axi.ar.addr := 0.U io.axi.ar.addr := 0.U
io.axi.ar.len := 0.U io.axi.ar.len := 0.U
io.axi.ar.size := 2.U io.axi.ar.size := 2.U
io.axi.ar.lock := 0.U
io.axi.ar.burst := BURST_FIXED.U io.axi.ar.burst := BURST_FIXED.U
io.axi.ar.valid := false.B val arvalid = RegInit(false.B)
io.axi.ar.valid := arvalid
io.axi.ar.prot := 0.U
io.axi.ar.cache := 0.U
io.axi.r.ready := true.B io.axi.r.ready := true.B
io.cpu.rdata := 0.U io.cpu.rdata := 0.U
io.cpu.acc_err := false.B io.cpu.acc_err := false.B
@ -38,14 +43,14 @@ class ICache(implicit config: CpuConfig) extends Module {
status := s_finishwait status := s_finishwait
}.otherwise { }.otherwise {
io.axi.ar.addr := Cat(io.cpu.addr(31, 2), 0.U(2.W)) io.axi.ar.addr := Cat(io.cpu.addr(31, 2), 0.U(2.W))
io.axi.ar.valid := true.B arvalid := true.B
status := s_read status := s_read
} }
} }
} }
is(s_read) { is(s_read) {
when(io.axi.ar.ready) { when(io.axi.ar.ready) {
io.axi.ar.valid := false.B arvalid := false.B
} }
when(io.axi.r.valid) { when(io.axi.r.valid) {
io.cpu.rdata := Mux(io.axi.ar.addr(2), io.axi.r.data(63, 32), io.axi.r.data(31, 0)) io.cpu.rdata := Mux(io.axi.ar.addr(2), io.axi.r.data(63, 32), io.axi.r.data(31, 0))
@ -62,7 +67,7 @@ class ICache(implicit config: CpuConfig) extends Module {
status := s_finishwait status := s_finishwait
}.otherwise { }.otherwise {
io.axi.ar.addr := Cat(io.cpu.addr(31, 2), 0.U(2.W)) io.axi.ar.addr := Cat(io.cpu.addr(31, 2), 0.U(2.W))
io.axi.ar.valid := true.B arvalid := true.B
status := s_read status := s_read
} }
} }

62
chisel/playground/src/defines/Bundles.scala
View File

@ -163,7 +163,7 @@ class R extends Bundle {
val ready = Output(Bool()) val ready = Output(Bool())
val id = Input(UInt(4.W)) val id = Input(UInt(4.W))
val data = Input(UInt(32.W)) val data = Input(UInt(DATA_WID.W))
val resp = Input(UInt(2.W)) val resp = Input(UInt(2.W))
val last = Input(Bool()) val last = Input(Bool())
val valid = Input(Bool()) val valid = Input(Bool())
@ -185,7 +185,7 @@ class AW extends Bundle {
class W extends Bundle { class W extends Bundle {
val id = Output(UInt(4.W)) val id = Output(UInt(4.W))
val data = Output(UInt(32.W)) val data = Output(UInt(DATA_WID.W))
val strb = Output(UInt(4.W)) val strb = Output(UInt(4.W))
val last = Output(Bool()) val last = Output(Bool())
val valid = Output(Bool()) val valid = Output(Bool())
@ -206,7 +206,7 @@ class ICache_AXIInterface extends Bundle {
val r = new R() val r = new R()
} }
class DCache_AXIInterface extends ICache_AXIInterface { class DCache_AXIInterface extends Bundle {
val aw = new AW() val aw = new AW()
val w = new W() val w = new W()
val b = new B() val b = new B()
@ -220,59 +220,13 @@ class Cache_AXIInterface extends Bundle {
val dcache = new DCache_AXIInterface() val dcache = new DCache_AXIInterface()
} }
// AXI read address channel
class AXI_AR extends Bundle {
val id = UInt(4.W) // transaction ID
val addr = UInt(32.W) // address
val len = UInt(8.W) // burst length
val size = UInt(3.W) // transfer size
val burst = UInt(2.W) // burst type
val lock = UInt(2.W) // lock type
val cache = UInt(4.W) // cache type
val prot = UInt(3.W) // protection type
}
// AXI read data channel
class AXI_R extends Bundle {
val id = UInt(4.W) // transaction ID
val data = UInt(32.W) // read data
val resp = UInt(2.W) // response type
val last = Bool() // last beat of burst
}
// AXI write address channel
class AXI_AW extends Bundle {
val id = UInt(4.W) // transaction ID
val addr = UInt(32.W) // address
val len = UInt(8.W) // burst length
val size = UInt(3.W) // transfer size
val burst = UInt(2.W) // burst type
val lock = UInt(2.W) // lock type
val cache = UInt(4.W) // cache type
val prot = UInt(3.W) // protection type
}
// AXI write data channel
class AXI_W extends Bundle {
val id = UInt(4.W) // transaction ID
val data = UInt(32.W) // write data
val strb = UInt(4.W) // byte enable
val last = Bool() // last beat of burst
}
// AXI write response channel
class AXI_B extends Bundle {
val id = UInt(4.W) // transaction ID
val resp = UInt(2.W) // response type
}
// AXI interface // AXI interface
class AXI extends Bundle { class AXI extends Bundle {
val ar = Decoupled(new AXI_AR()) // read address channel val ar = new AR() // read address channel
val r = Flipped(Decoupled(new AXI_R())) // read data channel val r = new R() // read data channel
val aw = Decoupled(new AXI_AW()) // write address channel val aw = new AW() // write address channel
val w = Decoupled(new AXI_W()) // write data channel val w = new W() // write data channel
val b = Flipped(Decoupled(new AXI_B())) // write response channel val b = new B() // write response channel
} }
class DEBUG(implicit config: CpuConfig) extends Bundle { class DEBUG(implicit config: CpuConfig) extends Bundle {

6
chisel/playground/src/defines/Const.scala
View File

@ -7,11 +7,13 @@ import cpu.CpuConfig
trait Constants { trait Constants {
val config = new CpuConfig val config = new CpuConfig
val XLEN = 64
// 全局 // 全局
val PC_WID = 64 val PC_WID = XLEN
val PC_INIT = "h60000000".U(PC_WID.W) val PC_INIT = "h60000000".U(PC_WID.W)
val EXT_INT_WID = 6 val EXT_INT_WID = 6
val HILO_WID = 64
val WRITE_ENABLE = true.B val WRITE_ENABLE = true.B
val WRITE_DISABLE = false.B val WRITE_DISABLE = false.B
@ -151,7 +153,7 @@ trait Constants {
// GPR RegFile // GPR RegFile
val AREG_NUM = 32 val AREG_NUM = 32
val REG_ADDR_WID = 5 val REG_ADDR_WID = 5
val DATA_WID = 64 val DATA_WID = XLEN
// CP0寄存器 // CP0寄存器
// CP0 Register (5.w), Select (3.w) // CP0 Register (5.w), Select (3.w)

4
chisel/playground/test/src/TestMain.scala
View File

@ -1,10 +1,10 @@
import cpu._ import cpu._
import circt.stage._ import circt.stage._
import cache.CacheAXIInterface import cache.Cache
object TestMain extends App { object TestMain extends App {
implicit val config = new CpuConfig() implicit val config = new CpuConfig()
def top = new CacheAXIInterface() def top = new Cache()
val useMFC = false // use MLIR-based firrtl compiler val useMFC = false // use MLIR-based firrtl compiler
val generator = Seq(chisel3.stage.ChiselGeneratorAnnotation(() => top)) val generator = Seq(chisel3.stage.ChiselGeneratorAnnotation(() => top))
if (useMFC) { if (useMFC) {