1
0

Merge branch 'master' of github.com:ucb-bar/rocket-chip into tl2-irrevocable

This commit is contained in:
Henry Cook 2016-09-14 17:50:17 -07:00
commit 1b53e477fa
18 changed files with 214 additions and 58 deletions

View File

@ -49,12 +49,13 @@ bootrom_img = $(base_dir)/bootrom/bootrom.img
# Constants Header Files # Constants Header Files
#--------------------------------------------------------------------- #---------------------------------------------------------------------
# sed uses -E (instead of -r) for BSD support
params_file = $(generated_dir)/$(MODEL).$(CONFIG).prm params_file = $(generated_dir)/$(MODEL).$(CONFIG).prm
consts_header = $(generated_dir)/consts.$(CONFIG).h consts_header = $(generated_dir)/consts.$(CONFIG).h
$(consts_header): $(params_file) $(consts_header): $(params_file)
echo "#ifndef __CONST_H__" > $@ echo "#ifndef __CONST_H__" > $@
echo "#define __CONST_H__" >> $@ echo "#define __CONST_H__" >> $@
sed -r 's/\(([A-Za-z0-9_]+),([A-Za-z0-9_]+)\)/#define \1 \2/' $< >> $@ sed -E 's/\(([A-Za-z0-9_]+),([A-Za-z0-9_]+)\)/#define \1 \2/' $< >> $@
echo "#endif // __CONST_H__" >> $@ echo "#endif // __CONST_H__" >> $@
params_file_debug = $(generated_dir_debug)/$(MODEL).$(CONFIG).prm params_file_debug = $(generated_dir_debug)/$(MODEL).$(CONFIG).prm
@ -62,7 +63,7 @@ consts_header_debug = $(generated_dir_debug)/consts.$(CONFIG).h
$(consts_header_debug): $(params_file_debug) $(consts_header_debug): $(params_file_debug)
echo "#ifndef __CONST_H__" > $@ echo "#ifndef __CONST_H__" > $@
echo "#define __CONST_H__" >> $@ echo "#define __CONST_H__" >> $@
sed -r 's/\(([A-Za-z0-9_]+),([A-Za-z0-9_]+)\)/#define \1 \2/' $< >> $@ sed -E 's/\(([A-Za-z0-9_]+),([A-Za-z0-9_]+)\)/#define \1 \2/' $< >> $@
echo "#endif // __CONST_H__" >> $@ echo "#endif // __CONST_H__" >> $@
clean-run-output: clean-run-output:

View File

@ -98,14 +98,14 @@ int main(int argc, char** argv)
#if VM_TRACE #if VM_TRACE
bool dump = tfp && trace_count >= start; bool dump = tfp && trace_count >= start;
if (dump) if (dump)
tfp->dump(trace_count * 2); tfp->dump(static_cast<vluint64_t>(trace_count * 2));
#endif #endif
tile->clk = 1; tile->clk = 1;
tile->eval(); tile->eval();
#if VM_TRACE #if VM_TRACE
if (dump) if (dump)
tfp->dump(trace_count * 2 + 1); tfp->dump(static_cast<vluint64_t>(trace_count * 2 + 1));
#endif #endif
trace_count++; trace_count++;
} }

2
firrtl

@ -1 +1 @@
Subproject commit 6a05468ed0ece1ace3019666b16f2ae83ef76ef9 Subproject commit 7c38199ce7a5d9dd7e27ffbb9b2b2770b972ed94

View File

@ -59,7 +59,7 @@ abstract class Coreplex(implicit val p: Parameters, implicit val c: CoreplexConf
val slave = Vec(c.nSlaves, new ClientUncachedTileLinkIO()(innerParams)).flip val slave = Vec(c.nSlaves, new ClientUncachedTileLinkIO()(innerParams)).flip
val interrupts = Vec(c.nExtInterrupts, Bool()).asInput val interrupts = Vec(c.nExtInterrupts, Bool()).asInput
val debug = new DebugBusIO()(p).flip val debug = new DebugBusIO()(p).flip
val rtcTick = Bool(INPUT) val prci = Vec(c.nTiles, new PRCITileIO).flip
val success: Option[Bool] = hasSuccessFlag.option(Bool(OUTPUT)) val success: Option[Bool] = hasSuccessFlag.option(Bool(OUTPUT))
} }
@ -170,21 +170,14 @@ class DefaultCoreplex(tp: Parameters, tc: CoreplexConfig) extends Coreplex()(tp,
debugModule.io.tl <> mmioNetwork.port("int:debug") debugModule.io.tl <> mmioNetwork.port("int:debug")
debugModule.io.db <> io.debug debugModule.io.db <> io.debug
val prci = Module(new PRCI) // connect coreplex-internal interrupts to tiles
prci.io.tl <> mmioNetwork.port("int:prci") for (((tile, tileReset), i) <- (tileList zip tileResets) zipWithIndex) {
prci.io.rtcTick := io.rtcTick tileReset := io.prci(i).reset
tile.io.interrupts := io.prci(i).interrupts
(prci.io.tiles, tileResets, tileList).zipped.foreach { tile.io.interrupts.meip := plic.io.harts(plic.cfg.context(i, 'M'))
case (prci, rst, tile) => tile.io.interrupts.seip.foreach(_ := plic.io.harts(plic.cfg.context(i, 'S')))
rst := reset tile.io.interrupts.debug := debugModule.io.debugInterrupts(i)
tile.io.prci <> prci tile.io.hartid := i
}
for (i <- 0 until tc.nTiles) {
prci.io.interrupts(i).meip := plic.io.harts(plic.cfg.context(i, 'M'))
if (p(UseVM))
prci.io.interrupts(i).seip := plic.io.harts(plic.cfg.context(i, 'S'))
prci.io.interrupts(i).debug := debugModule.io.debugInterrupts(i)
} }
val tileSlavePorts = (0 until tc.nTiles) map (i => s"int:dmem$i") filter (ioAddrMap contains _) val tileSlavePorts = (0 until tc.nTiles) map (i => s"int:dmem$i") filter (ioAddrMap contains _)

View File

@ -7,10 +7,14 @@ import uncore.tilelink.TLId
import cde.Parameters import cde.Parameters
class UnitTestCoreplex(tp: Parameters, tc: CoreplexConfig) extends Coreplex()(tp, tc) { class UnitTestCoreplex(tp: Parameters, tc: CoreplexConfig) extends Coreplex()(tp, tc) {
require(!tc.hasExtMMIOPort)
require(tc.nSlaves == 0) require(tc.nSlaves == 0)
require(tc.nMemChannels == 0) require(tc.nMemChannels == 0)
io.master.mmio.foreach { port =>
port.acquire.valid := Bool(false)
port.grant.ready := Bool(false)
}
io.debug.req.ready := Bool(false) io.debug.req.ready := Bool(false)
io.debug.resp.valid := Bool(false) io.debug.resp.valid := Bool(false)

View File

@ -84,4 +84,43 @@ object AsyncIrrevocableFrom
def apply[T <: Data](from_clock: Clock, from_reset: Bool, from_source: ReadyValidIO[T], depth: Int = 8, sync: Int = 3): IrrevocableIO[T] = { def apply[T <: Data](from_clock: Clock, from_reset: Bool, from_source: ReadyValidIO[T], depth: Int = 8, sync: Int = 3): IrrevocableIO[T] = {
PostQueueIrrevocablize(AsyncDecoupledFrom(from_clock, from_reset, from_source, depth, sync)) PostQueueIrrevocablize(AsyncDecoupledFrom(from_clock, from_reset, from_source, depth, sync))
} }
/** Because Chisel/FIRRTL does not allow us
* to directly assign clocks from Signals,
* we need this black box module.
* This may even be useful because some back-end
* flows like to have this sort of transition
* flagged with a special cell or module anyway.
*/
class SignalToClock extends BlackBox {
val io = new Bundle {
val signal_in = Bool(INPUT)
val clock_out = Clock(OUTPUT)
}
// io.clock_out := io.signal_in
}
object SignalToClock {
def apply(signal: Bool): Clock = {
val s2c = Module(new SignalToClock)
s2c.io.signal_in := signal
s2c.io.clock_out
}
}
class ClockToSignal extends BlackBox {
val io = new Bundle {
val clock_in = Clock(INPUT)
val signal_out = Bool(OUTPUT)
}
}
object ClockToSignal {
def apply(clk: Clock): Bool = {
val c2s = Module(new ClockToSignal)
c2s.io.clock_in := clk
c2s.io.signal_out
}
} }

View File

@ -521,10 +521,8 @@ class HastiTestSRAM(depth: Int)(implicit p: Parameters) extends HastiModule()(p)
// In case we are stalled, we need to hold the read data // In case we are stalled, we need to hold the read data
val d_rdata = holdUnless(mem.read(a_address, read), RegNext(read)) val d_rdata = holdUnless(mem.read(a_address, read), RegNext(read))
// Whenever the port is not needed for reading, execute pending writes // Whenever the port is not needed for reading, execute pending writes
when (!read) { when (!read && p_valid) { mem.write(p_address, p_wdata, p_mask.toBools) }
when (p_valid) { mem.write(p_address, p_wdata, p_mask.toBools) } when (!read) { p_valid := Bool(false) }
p_valid := Bool(false)
}
// Record the request for later? // Record the request for later?
when (ready && a_request && a_write) { when (ready && a_request && a_write) {

View File

@ -61,6 +61,14 @@ class DCSR extends Bundle {
val prv = UInt(width = PRV.SZ) val prv = UInt(width = PRV.SZ)
} }
class TileInterrupts(implicit p: Parameters) extends CoreBundle()(p) {
val debug = Bool()
val mtip = Bool()
val msip = Bool()
val meip = Bool()
val seip = usingVM.option(Bool())
}
class MIP extends Bundle { class MIP extends Bundle {
val rocc = Bool() val rocc = Bool()
val meip = Bool() val meip = Bool()
@ -121,7 +129,8 @@ object CSR
} }
class CSRFileIO(implicit p: Parameters) extends CoreBundle { class CSRFileIO(implicit p: Parameters) extends CoreBundle {
val prci = new PRCITileIO().flip val interrupts = new TileInterrupts().asInput
val hartid = UInt(INPUT, xLen)
val rw = new Bundle { val rw = new Bundle {
val addr = UInt(INPUT, CSR.ADDRSZ) val addr = UInt(INPUT, CSR.ADDRSZ)
val cmd = Bits(INPUT, CSR.SZ) val cmd = Bits(INPUT, CSR.SZ)
@ -297,7 +306,7 @@ class CSRFile(implicit p: Parameters) extends CoreModule()(p)
CSRs.mepc -> reg_mepc.sextTo(xLen), CSRs.mepc -> reg_mepc.sextTo(xLen),
CSRs.mbadaddr -> reg_mbadaddr.sextTo(xLen), CSRs.mbadaddr -> reg_mbadaddr.sextTo(xLen),
CSRs.mcause -> reg_mcause, CSRs.mcause -> reg_mcause,
CSRs.mhartid -> io.prci.id) CSRs.mhartid -> io.hartid)
val debug_csrs = collection.immutable.ListMap( val debug_csrs = collection.immutable.ListMap(
CSRs.dcsr -> reg_dcsr.asUInt, CSRs.dcsr -> reg_dcsr.asUInt,
@ -611,8 +620,8 @@ class CSRFile(implicit p: Parameters) extends CoreModule()(p)
} }
} }
reg_mip := io.prci.interrupts reg_mip := io.interrupts
reg_dcsr.debugint := io.prci.interrupts.debug reg_dcsr.debugint := io.interrupts.debug
reg_sptbr.asid := 0 reg_sptbr.asid := 0
if (nBreakpoints <= 1) reg_tselect := 0 if (nBreakpoints <= 1) reg_tselect := 0

View File

@ -143,7 +143,8 @@ object ImmGen {
class Rocket(implicit p: Parameters) extends CoreModule()(p) { class Rocket(implicit p: Parameters) extends CoreModule()(p) {
val io = new Bundle { val io = new Bundle {
val prci = new PRCITileIO().flip val interrupts = new TileInterrupts().asInput
val hartid = UInt(INPUT, xLen)
val imem = new FrontendIO()(p.alterPartial({case CacheName => "L1I" })) val imem = new FrontendIO()(p.alterPartial({case CacheName => "L1I" }))
val dmem = new HellaCacheIO()(p.alterPartial({ case CacheName => "L1D" })) val dmem = new HellaCacheIO()(p.alterPartial({ case CacheName => "L1D" }))
val ptw = new DatapathPTWIO().flip val ptw = new DatapathPTWIO().flip
@ -514,7 +515,8 @@ class Rocket(implicit p: Parameters) extends CoreModule()(p) {
csr.io.exception := wb_reg_xcpt csr.io.exception := wb_reg_xcpt
csr.io.cause := wb_reg_cause csr.io.cause := wb_reg_cause
csr.io.retire := wb_valid csr.io.retire := wb_valid
csr.io.prci <> io.prci csr.io.interrupts := io.interrupts
csr.io.hartid := io.hartid
io.fpu.fcsr_rm := csr.io.fcsr_rm io.fpu.fcsr_rm := csr.io.fcsr_rm
csr.io.fcsr_flags := io.fpu.fcsr_flags csr.io.fcsr_flags := io.fpu.fcsr_flags
csr.io.rocc.interrupt <> io.rocc.interrupt csr.io.rocc.interrupt <> io.rocc.interrupt
@ -681,7 +683,7 @@ class Rocket(implicit p: Parameters) extends CoreModule()(p) {
} }
else { else {
printf("C%d: %d [%d] pc=[%x] W[r%d=%x][%d] R[r%d=%x] R[r%d=%x] inst=[%x] DASM(%x)\n", printf("C%d: %d [%d] pc=[%x] W[r%d=%x][%d] R[r%d=%x] R[r%d=%x] inst=[%x] DASM(%x)\n",
io.prci.id, csr.io.time(31,0), wb_valid, wb_reg_pc, io.hartid, csr.io.time(31,0), wb_valid, wb_reg_pc,
Mux(rf_wen, rf_waddr, UInt(0)), rf_wdata, rf_wen, Mux(rf_wen, rf_waddr, UInt(0)), rf_wdata, rf_wen,
wb_reg_inst(19,15), Reg(next=Reg(next=ex_rs(0))), wb_reg_inst(19,15), Reg(next=Reg(next=ex_rs(0))),
wb_reg_inst(24,20), Reg(next=Reg(next=ex_rs(1))), wb_reg_inst(24,20), Reg(next=Reg(next=ex_rs(1))),

View File

@ -31,7 +31,8 @@ abstract class Tile(clockSignal: Clock = null, resetSignal: Bool = null)
class TileIO extends Bundle { class TileIO extends Bundle {
val cached = Vec(nCachedTileLinkPorts, new ClientTileLinkIO) val cached = Vec(nCachedTileLinkPorts, new ClientTileLinkIO)
val uncached = Vec(nUncachedTileLinkPorts, new ClientUncachedTileLinkIO) val uncached = Vec(nUncachedTileLinkPorts, new ClientUncachedTileLinkIO)
val prci = new PRCITileIO().flip val hartid = UInt(INPUT, p(XLen))
val interrupts = new TileInterrupts().asInput
val slave = (p(DataScratchpadSize) > 0).option(new ClientUncachedTileLinkIO().flip) val slave = (p(DataScratchpadSize) > 0).option(new ClientUncachedTileLinkIO().flip)
} }
@ -54,7 +55,8 @@ class RocketTile(clockSignal: Clock = null, resetSignal: Bool = null)
val uncachedArbPorts = collection.mutable.ArrayBuffer(icache.io.mem) val uncachedArbPorts = collection.mutable.ArrayBuffer(icache.io.mem)
val uncachedPorts = collection.mutable.ArrayBuffer[ClientUncachedTileLinkIO]() val uncachedPorts = collection.mutable.ArrayBuffer[ClientUncachedTileLinkIO]()
val cachedPorts = collection.mutable.ArrayBuffer(dcache.mem) val cachedPorts = collection.mutable.ArrayBuffer(dcache.mem)
core.io.prci <> io.prci core.io.interrupts := io.interrupts
core.io.hartid := io.hartid
icache.io.cpu <> core.io.imem icache.io.cpu <> core.io.imem
val fpuOpt = p(FPUKey).map(cfg => Module(new FPU(cfg))) val fpuOpt = p(FPUKey).map(cfg => Module(new FPU(cfg)))

View File

@ -276,6 +276,33 @@ trait PeripherySlaveModule extends HasPeripheryParameters {
///// /////
/** Always-ON block */
trait PeripheryAON extends LazyModule {
implicit val p: Parameters
val pDevices: ResourceManager[AddrMapEntry]
pDevices.add(AddrMapEntry("prci", MemSize(0x4000000, MemAttr(AddrMapProt.RW))))
}
trait PeripheryAONBundle {
implicit val p: Parameters
}
trait PeripheryAONModule extends HasPeripheryParameters {
implicit val p: Parameters
val outer: PeripheryAON
val io: PeripheryAONBundle
val mmioNetwork: Option[TileLinkRecursiveInterconnect]
val coreplex: Coreplex
val prci = Module(new PRCI()(innerMMIOParams))
prci.io.rtcTick := Counter(p(RTCPeriod)).inc()
prci.io.tl <> mmioNetwork.get.port("prci")
coreplex.io.prci <> prci.io.tiles
}
/////
trait PeripheryTestRAM extends LazyModule { trait PeripheryTestRAM extends LazyModule {
implicit val p: Parameters implicit val p: Parameters
val pDevices: ResourceManager[AddrMapEntry] val pDevices: ResourceManager[AddrMapEntry]

View File

@ -66,7 +66,6 @@ class BaseTopModule[+L <: BaseTop, +B <: BaseTopBundle](val p: Parameters, l: L,
val io: B = b(coreplex) val io: B = b(coreplex)
io.success zip coreplex.io.success map { case (x, y) => x := y } io.success zip coreplex.io.success map { case (x, y) => x := y }
coreplex.io.rtcTick := Counter(p(RTCPeriod)).inc()
val mmioNetwork = c.hasExtMMIOPort.option( val mmioNetwork = c.hasExtMMIOPort.option(
Module(new TileLinkRecursiveInterconnect(1, p(GlobalAddrMap).get.subMap("io:ext"))( Module(new TileLinkRecursiveInterconnect(1, p(GlobalAddrMap).get.subMap("io:ext"))(
@ -76,17 +75,17 @@ class BaseTopModule[+L <: BaseTop, +B <: BaseTopBundle](val p: Parameters, l: L,
/** Example Top with Periphery */ /** Example Top with Periphery */
class ExampleTop(p: Parameters) extends BaseTop(p) class ExampleTop(p: Parameters) extends BaseTop(p)
with PeripheryDebug with PeripheryExtInterrupts with PeripheryDebug with PeripheryExtInterrupts with PeripheryAON
with PeripheryMasterMem with PeripheryMasterMMIO with PeripherySlave { with PeripheryMasterMem with PeripheryMasterMMIO with PeripherySlave {
override lazy val module = Module(new ExampleTopModule(p, this, new ExampleTopBundle(p, _))) override lazy val module = Module(new ExampleTopModule(p, this, new ExampleTopBundle(p, _)))
} }
class ExampleTopBundle(p: Parameters, c: Coreplex) extends BaseTopBundle(p, c) class ExampleTopBundle(p: Parameters, c: Coreplex) extends BaseTopBundle(p, c)
with PeripheryDebugBundle with PeripheryExtInterruptsBundle with PeripheryDebugBundle with PeripheryExtInterruptsBundle with PeripheryAONBundle
with PeripheryMasterMemBundle with PeripheryMasterMMIOBundle with PeripherySlaveBundle with PeripheryMasterMemBundle with PeripheryMasterMMIOBundle with PeripherySlaveBundle
class ExampleTopModule[+L <: ExampleTop, +B <: ExampleTopBundle](p: Parameters, l: L, b: Coreplex => B) extends BaseTopModule(p, l, b) class ExampleTopModule[+L <: ExampleTop, +B <: ExampleTopBundle](p: Parameters, l: L, b: Coreplex => B) extends BaseTopModule(p, l, b)
with PeripheryDebugModule with PeripheryExtInterruptsModule with PeripheryDebugModule with PeripheryExtInterruptsModule with PeripheryAONModule
with PeripheryMasterMemModule with PeripheryMasterMMIOModule with PeripherySlaveModule with PeripheryMasterMemModule with PeripheryMasterMMIOModule with PeripherySlaveModule
/** Example Top with TestRAM */ /** Example Top with TestRAM */

View File

@ -54,7 +54,6 @@ object GenerateGlobalAddrMap {
entries += AddrMapEntry("debug", MemSize(4096, MemAttr(AddrMapProt.RWX))) entries += AddrMapEntry("debug", MemSize(4096, MemAttr(AddrMapProt.RWX)))
entries += AddrMapEntry("bootrom", MemSize(4096, MemAttr(AddrMapProt.RX))) entries += AddrMapEntry("bootrom", MemSize(4096, MemAttr(AddrMapProt.RX)))
entries += AddrMapEntry("plic", MemRange(0x40000000, 0x4000000, MemAttr(AddrMapProt.RW))) entries += AddrMapEntry("plic", MemRange(0x40000000, 0x4000000, MemAttr(AddrMapProt.RW)))
entries += AddrMapEntry("prci", MemSize(0x4000000, MemAttr(AddrMapProt.RW)))
if (p(DataScratchpadSize) > 0) { // TODO heterogeneous tiles if (p(DataScratchpadSize) > 0) { // TODO heterogeneous tiles
require(p(NTiles) == 1) // TODO relax this require(p(NTiles) == 1) // TODO relax this
require(p(NMemoryChannels) == 0) // TODO allow both scratchpad & DRAM require(p(NMemoryChannels) == 0) // TODO allow both scratchpad & DRAM
@ -84,7 +83,7 @@ object GenerateConfigString {
def apply(p: Parameters, c: CoreplexConfig, pDevicesEntries: Seq[AddrMapEntry]) = { def apply(p: Parameters, c: CoreplexConfig, pDevicesEntries: Seq[AddrMapEntry]) = {
val addrMap = p(GlobalAddrMap).get val addrMap = p(GlobalAddrMap).get
val plicAddr = addrMap("io:int:plic").start val plicAddr = addrMap("io:int:plic").start
val prciAddr = addrMap("io:int:prci").start val prciAddr = addrMap("io:ext:prci").start
val xLen = p(XLen) val xLen = p(XLen)
val res = new StringBuilder val res = new StringBuilder
res append "plic {\n" res append "plic {\n"

View File

@ -13,22 +13,12 @@ import cde.{Parameters, Field}
/** Number of tiles */ /** Number of tiles */
case object NTiles extends Field[Int] case object NTiles extends Field[Int]
class PRCIInterrupts extends Bundle {
val meip = Bool()
val seip = Bool()
val debug = Bool()
}
class PRCITileIO(implicit p: Parameters) extends Bundle { class PRCITileIO(implicit p: Parameters) extends Bundle {
val reset = Bool(OUTPUT) val reset = Bool(OUTPUT)
val id = UInt(OUTPUT, log2Up(p(NTiles))) val interrupts = new Bundle {
val interrupts = {
val result = new PRCIInterrupts {
val mtip = Bool() val mtip = Bool()
val msip = Bool() val msip = Bool()
} }
result.asOutput
}
override def cloneType: this.type = new PRCITileIO().asInstanceOf[this.type] override def cloneType: this.type = new PRCITileIO().asInstanceOf[this.type]
} }
@ -47,7 +37,6 @@ class PRCI(implicit val p: Parameters) extends Module
with HasTileLinkParameters with HasTileLinkParameters
with HasAddrMapParameters { with HasAddrMapParameters {
val io = new Bundle { val io = new Bundle {
val interrupts = Vec(p(NTiles), new PRCIInterrupts).asInput
val tl = new ClientUncachedTileLinkIO().flip val tl = new ClientUncachedTileLinkIO().flip
val tiles = Vec(p(NTiles), new PRCITileIO) val tiles = Vec(p(NTiles), new PRCITileIO)
val rtcTick = Bool(INPUT) val rtcTick = Bool(INPUT)
@ -84,10 +73,9 @@ class PRCI(implicit val p: Parameters) extends Module
} }
for ((tile, i) <- io.tiles zipWithIndex) { for ((tile, i) <- io.tiles zipWithIndex) {
tile.interrupts := io.interrupts(i)
tile.interrupts.msip := ipi(i)(0) tile.interrupts.msip := ipi(i)(0)
tile.interrupts.mtip := time >= timecmp(i) tile.interrupts.mtip := time >= timecmp(i)
tile.id := UInt(i) tile.reset := reset
} }
// TODO generalize these to help other TL slaves // TODO generalize these to help other TL slaves

View File

@ -5,6 +5,7 @@ package uncore.tilelink2
import Chisel._ import Chisel._
import chisel3.util.{Irrevocable, IrrevocableIO} import chisel3.util.{Irrevocable, IrrevocableIO}
import junctions._ import junctions._
import uncore.util.{AsyncResetRegVec}
// A very simple flow control state machine, run in the specified clock domain // A very simple flow control state machine, run in the specified clock domain
class BusyRegisterCrossing(clock: Clock, reset: Bool) class BusyRegisterCrossing(clock: Clock, reset: Bool)
@ -131,3 +132,56 @@ class RegisterReadCrossing[T <: Data](gen: T, sync: Int = 3) extends Module {
crossing.io.deq.ready := io.master_port.request.valid && !reg.io.busy crossing.io.deq.ready := io.master_port.request.valid && !reg.io.busy
crossing.io.enq.valid := Bool(true) crossing.io.enq.valid := Bool(true)
} }
/** Wrapper to create an
* asynchronously reset
* slave register which
* can be both read
* and written using
* crossing FIFOs.
*/
object AsyncRWSlaveRegField {
def apply(slave_clock: Clock,
slave_reset: Bool,
width: Int,
init: Int,
master_allow: Bool = Bool(true),
slave_allow: Bool = Bool(true)
): (UInt, RegField) = {
val async_slave_reg = Module(new AsyncResetRegVec(width, init))
async_slave_reg.reset := slave_reset
async_slave_reg.clock := slave_clock
val wr_crossing = Module (new RegisterWriteCrossing(UInt(width = width)))
val scope = Module (new AsyncScope())
wr_crossing.io.master_clock := scope.clock
wr_crossing.io.master_reset := scope.reset
wr_crossing.io.master_allow := master_allow
wr_crossing.io.slave_clock := slave_clock
wr_crossing.io.slave_reset := slave_reset
wr_crossing.io.slave_allow := slave_allow
async_slave_reg.io.en := wr_crossing.io.slave_valid
async_slave_reg.io.d := wr_crossing.io.slave_register
val rd_crossing = Module (new RegisterReadCrossing(UInt(width = width )))
rd_crossing.io.master_clock := scope.clock
rd_crossing.io.master_reset := scope.reset
rd_crossing.io.master_allow := master_allow
rd_crossing.io.slave_clock := slave_clock
rd_crossing.io.slave_reset := slave_reset
rd_crossing.io.slave_allow := slave_allow
rd_crossing.io.slave_register := async_slave_reg.io.q
(async_slave_reg.io.q, RegField(width, rd_crossing.io.master_port, wr_crossing.io.master_port))
}
}

View File

@ -7,7 +7,11 @@
bb_vsrcs = $(base_dir)/vsrc/DebugTransportModuleJtag.v \ bb_vsrcs = $(base_dir)/vsrc/DebugTransportModuleJtag.v \
$(base_dir)/vsrc/jtag_vpi.v \ $(base_dir)/vsrc/jtag_vpi.v \
$(base_dir)/vsrc/AsyncMailbox.v \ $(base_dir)/vsrc/AsyncMailbox.v \
$(base_dir)/vsrc/AsyncResetReg.v $(base_dir)/vsrc/AsyncResetReg.v \
$(base_dir)/vsrc/ClockDivider.v \
$(base_dir)/vsrc/ClockToSignal.v \
$(base_dir)/vsrc/SignalToClock.v \
sim_vsrcs = \ sim_vsrcs = \
$(generated_dir)/$(MODEL).$(CONFIG).v \ $(generated_dir)/$(MODEL).$(CONFIG).v \

19
vsrc/ClockToSignal.v Normal file
View File

@ -0,0 +1,19 @@
/* This blackbox is needed by
* Chisel in order to do type conversion.
* It may be useful for some synthesis flows
* as well which require special
* flagging on conversion from data to clock.
*/
module ClockToSignal(
output signal_out,
input clock_in
);
assign signal_out = clock_in;
endmodule // ClockToSignal

18
vsrc/SignalToClock.v Normal file
View File

@ -0,0 +1,18 @@
/* This blackbox is needed by
* Chisel in order to do type conversion.
* It may be useful for some synthesis flows
* as well which require special
* flagging on conversion from data to clock.
*/
module SignalToClock (
output clock_out,
input signal_in
);
assign clock_out = signal_in;
endmodule // SignalToClock