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tilelink2: refactor firstlast helper method

This commit is contained in:
Wesley W. Terpstra 2016-10-07 20:15:31 -07:00
parent a404cd2abf
commit 683a2e6785
4 changed files with 61 additions and 92 deletions
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15
src/main/scala/uncore/tilelink2/Edges.scala
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@ -4,6 +4,7 @@ package uncore.tilelink2
import Chisel._
import chisel3.internal.sourceinfo.SourceInfo
import chisel3.util.IrrevocableIO
import diplomacy._
class TLEdge(
@ -218,6 +219,20 @@ class TLEdge(
}
}
}
def firstlast(bits: TLChannel, fire: Bool): (Bool, Bool, UInt) = {
val beats1 = numBeats1(bits)
val counter = RegInit(UInt(0, width = log2Up(maxTransfer / manager.beatBytes)))
val counter1 = counter - UInt(1)
val first = counter === UInt(0)
val last = counter === UInt(1) || beats1 === UInt(0)
when (fire) {
counter := Mux(first, beats1, counter1)
}
(first, last, beats1 & ~counter1)
}
def firstlast(x: IrrevocableIO[TLChannel]): (Bool, Bool, UInt) = firstlast(x.bits, x.fire())
}
class TLEdgeOut(

22
src/main/scala/uncore/tilelink2/Fuzzer.scala
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@ -113,19 +113,11 @@ class TLFuzzer(
// Progress within each operation
val a = out.a.bits
val a_beats1 = edge.numBeats1(a)
val a_counter = RegInit(UInt(0, width = maxLgBeats))
val a_counter1 = a_counter - UInt(1)
val a_first = a_counter === UInt(0)
val a_last = a_counter === UInt(1) || a_beats1 === UInt(0)
val (a_first, a_last, _) = edge.firstlast(out.a)
val req_done = out.a.fire() && a_last
val d = out.d.bits
val d_beats1 = edge.numBeats1(d)
val d_counter = RegInit(UInt(0, width = maxLgBeats))
val d_counter1 = d_counter - UInt(1)
val d_first = d_counter === UInt(0)
val d_last = d_counter === UInt(1) || d_beats1 === UInt(0)
val (d_first, d_last, _) = edge.firstlast(out.d)
val resp_done = out.d.fire() && d_last
// Source ID generation
@ -199,14 +191,12 @@ class TLFuzzer(
inc := !legal || req_done
inc_beat := !legal || out.a.fire()
when (out.a.fire()) {
a_counter := Mux(a_first, a_beats1, a_counter1)
when(a_last) { num_reqs := num_reqs - UInt(1) }
when (out.a.fire() && a_last) {
num_reqs := num_reqs - UInt(1)
}
when (out.d.fire()) {
d_counter := Mux(d_first, d_beats1, d_counter1)
when(d_last) { num_resps := num_resps - UInt(1) }
when (out.d.fire() && d_last) {
num_resps := num_resps - UInt(1)
}
}
}

97
src/main/scala/uncore/tilelink2/Monitor.scala
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@ -282,68 +282,60 @@ class TLMonitor(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: Source
}
def legalizeMultibeatA(a: IrrevocableSnoop[TLBundleA], edge: TLEdge)(implicit sourceInfo: SourceInfo) {
val counter = RegInit(UInt(0, width = log2Up(edge.maxTransfer)))
val (a_first, _, _) = edge.firstlast(a.bits, a.fire())
val opcode = Reg(UInt())
val param = Reg(UInt())
val size = Reg(UInt())
val source = Reg(UInt())
val addr_hi = Reg(UInt())
when (a.valid && counter =/= UInt(0)) {
when (a.valid && !a_first) {
assert (a.bits.opcode === opcode, "'A' channel opcode changed within multibeat operation" + extra)
assert (a.bits.param === param, "'A' channel param changed within multibeat operation" + extra)
assert (a.bits.size === size, "'A' channel size changed within multibeat operation" + extra)
assert (a.bits.source === source, "'A' channel source changed within multibeat operation" + extra)
assert (a.bits.addr_hi=== addr_hi,"'A' channel addr_hi changed with multibeat operation" + extra)
}
when (a.fire()) {
counter := counter - UInt(1)
when (counter === UInt(0)) {
counter := edge.numBeats(a.bits) - UInt(1)
opcode := a.bits.opcode
param := a.bits.param
size := a.bits.size
source := a.bits.source
addr_hi := a.bits.addr_hi
}
when (a.fire() && a_first) {
opcode := a.bits.opcode
param := a.bits.param
size := a.bits.size
source := a.bits.source
addr_hi := a.bits.addr_hi
}
}
def legalizeMultibeatB(b: IrrevocableSnoop[TLBundleB], edge: TLEdge)(implicit sourceInfo: SourceInfo) {
val counter = RegInit(UInt(0, width = log2Up(edge.maxTransfer)))
val (b_first, _, _) = edge.firstlast(b.bits, b.fire())
val opcode = Reg(UInt())
val param = Reg(UInt())
val size = Reg(UInt())
val source = Reg(UInt())
val addr_hi = Reg(UInt())
when (b.valid && counter =/= UInt(0)) {
when (b.valid && !b_first) {
assert (b.bits.opcode === opcode, "'B' channel opcode changed within multibeat operation" + extra)
assert (b.bits.param === param, "'B' channel param changed within multibeat operation" + extra)
assert (b.bits.size === size, "'B' channel size changed within multibeat operation" + extra)
assert (b.bits.source === source, "'B' channel source changed within multibeat operation" + extra)
assert (b.bits.addr_hi=== addr_hi,"'B' channel addr_hi changed with multibeat operation" + extra)
}
when (b.fire()) {
counter := counter - UInt(1)
when (counter === UInt(0)) {
counter := edge.numBeats(b.bits) - UInt(1)
opcode := b.bits.opcode
param := b.bits.param
size := b.bits.size
source := b.bits.source
addr_hi := b.bits.addr_hi
}
when (b.fire() && b_first) {
opcode := b.bits.opcode
param := b.bits.param
size := b.bits.size
source := b.bits.source
addr_hi := b.bits.addr_hi
}
}
def legalizeMultibeatC(c: IrrevocableSnoop[TLBundleC], edge: TLEdge)(implicit sourceInfo: SourceInfo) {
val counter = RegInit(UInt(0, width = log2Up(edge.maxTransfer)))
val (c_first, _, _) = edge.firstlast(c.bits, c.fire())
val opcode = Reg(UInt())
val param = Reg(UInt())
val size = Reg(UInt())
val source = Reg(UInt())
val addr_hi = Reg(UInt())
val addr_lo = Reg(UInt())
when (c.valid && counter =/= UInt(0)) {
when (c.valid && !c_first) {
assert (c.bits.opcode === opcode, "'C' channel opcode changed within multibeat operation" + extra)
assert (c.bits.param === param, "'C' channel param changed within multibeat operation" + extra)
assert (c.bits.size === size, "'C' channel size changed within multibeat operation" + extra)
@ -351,29 +343,25 @@ class TLMonitor(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: Source
assert (c.bits.addr_hi=== addr_hi,"'C' channel addr_hi changed with multibeat operation" + extra)
assert (c.bits.addr_lo=== addr_lo,"'C' channel addr_lo changed with multibeat operation" + extra)
}
when (c.fire()) {
counter := counter - UInt(1)
when (counter === UInt(0)) {
counter := edge.numBeats(c.bits) - UInt(1)
opcode := c.bits.opcode
param := c.bits.param
size := c.bits.size
source := c.bits.source
addr_hi := c.bits.addr_hi
addr_lo := c.bits.addr_lo
}
when (c.fire() && c_first) {
opcode := c.bits.opcode
param := c.bits.param
size := c.bits.size
source := c.bits.source
addr_hi := c.bits.addr_hi
addr_lo := c.bits.addr_lo
}
}
def legalizeMultibeatD(d: IrrevocableSnoop[TLBundleD], edge: TLEdge)(implicit sourceInfo: SourceInfo) {
val counter = RegInit(UInt(0, width = log2Up(edge.maxTransfer)))
val (d_first, _, _) = edge.firstlast(d.bits, d.fire())
val opcode = Reg(UInt())
val param = Reg(UInt())
val size = Reg(UInt())
val source = Reg(UInt())
val sink = Reg(UInt())
val addr_lo = Reg(UInt())
when (d.valid && counter =/= UInt(0)) {
when (d.valid && !d_first) {
assert (d.bits.opcode === opcode, "'D' channel opcode changed within multibeat operation" + extra)
assert (d.bits.param === param, "'D' channel param changed within multibeat operation" + extra)
assert (d.bits.size === size, "'D' channel size changed within multibeat operation" + extra)
@ -381,17 +369,13 @@ class TLMonitor(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: Source
assert (d.bits.sink === sink, "'D' channel sink changed with multibeat operation" + extra)
assert (d.bits.addr_lo=== addr_lo,"'D' channel addr_lo changed with multibeat operation" + extra)
}
when (d.fire()) {
counter := counter - UInt(1)
when (counter === UInt(0)) {
counter := edge.numBeats(d.bits) - UInt(1)
opcode := d.bits.opcode
param := d.bits.param
size := d.bits.size
source := d.bits.source
sink := d.bits.sink
addr_lo := d.bits.addr_lo
}
when (d.fire() && d_first) {
opcode := d.bits.opcode
param := d.bits.param
size := d.bits.size
source := d.bits.source
sink := d.bits.sink
addr_lo := d.bits.addr_lo
}
}
@ -425,15 +409,8 @@ class TLMonitor(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: Source
def legalizeSourceUnique(bundle: TLBundleSnoop, edge: TLEdge)(implicit sourceInfo: SourceInfo) {
val inflight = RegInit(UInt(0, width = edge.client.endSourceId))
val a_counter = RegInit(UInt(0, width = log2Up(edge.maxTransfer)))
val a_beats1 = edge.numBeats1(bundle.a.bits)
val a_first = a_counter === UInt(0)
val a_last = a_counter === UInt(1) || a_beats1 === UInt(0)
val d_counter = RegInit(UInt(0, width = log2Up(edge.maxTransfer)))
val d_beats1 = edge.numBeats1(bundle.d.bits)
val d_first = d_counter === UInt(0)
val d_last = d_counter === UInt(1) || d_beats1 === UInt(0)
val (_, a_last, _) = edge.firstlast(bundle.a.bits, bundle.a.fire())
val (_, d_last, _) = edge.firstlast(bundle.d.bits, bundle.d.fire())
val bypass = bundle.a.bits.source === bundle.d.bits.source
val a_bypass = bypass && bundle.d.valid && d_last
@ -445,14 +422,12 @@ class TLMonitor(gen: () => TLBundleSnoop, edge: () => TLEdge, sourceInfo: Source
val a_set = Wire(init = UInt(0, width = edge.client.endSourceId))
when (bundle.a.fire()) {
a_counter := Mux(a_first, a_beats1, a_counter - UInt(1))
when (a_last) { a_set := UIntToOH(bundle.a.bits.source) }
assert(a_bypass || !inflight(bundle.a.bits.source), "'A' channel re-used a source ID" + extra)
}
val d_clr = Wire(init = UInt(0, width = edge.client.endSourceId))
when (bundle.d.fire() && bundle.d.bits.opcode =/= TLMessages.ReleaseAck) {
d_counter := Mux(d_first, d_beats1, d_counter - UInt(1))
when (d_last) { d_clr := UIntToOH(bundle.d.bits.source) }
assert(d_bypass || inflight(bundle.d.bits.source), "'D' channel acknowledged for nothing inflight" + extra)
}

19
src/main/scala/uncore/tilelink2/RAMModel.scala
View File

@ -110,13 +110,10 @@ class TLRAMModel extends LazyModule
// Process A access requests
val a = Reg(next = in.a.bits)
val a_fire = Reg(next = in.a.fire(), init = Bool(false))
val a_beats1 = edge.numBeats1(a)
val (a_first, a_last, a_address_inc) = edge.firstlast(a, a_fire)
val a_size = edge.size(a)
val a_sizeOH = UIntToOH(a_size)
val a_counter = RegInit(UInt(0, width = maxLgBeats))
val a_counter1 = a_counter - UInt(1)
val a_first = a_counter === UInt(0)
val a_addr_hi = a.addr_hi | (a_beats1 & ~a_counter1)
val a_addr_hi = a.addr_hi | a_address_inc
val a_base = edge.address(a)
val a_mask = edge.mask(a_base, a_size)
val a_fifo = edge.manager.hasFifoIdFast(a_base)
@ -133,8 +130,6 @@ class TLRAMModel extends LazyModule
when (a_fire) {
// Record the request so we can handle it's response
a_counter := Mux(a_first, a_beats1, a_counter1)
assert (a.opcode =/= TLMessages.Acquire)
// Mark the operation as valid
@ -199,15 +194,11 @@ class TLRAMModel extends LazyModule
// Process D access responses
val d = RegNext(out.d.bits)
val d_fire = Reg(next = out.d.fire(), init = Bool(false))
val d_beats1 = edge.numBeats1(d)
val (d_first, d_last, d_address_inc) = edge.firstlast(d, d_fire)
val d_size = edge.size(d)
val d_sizeOH = UIntToOH(d_size)
val d_counter = RegInit(UInt(0, width = maxLgBeats))
val d_counter1 = d_counter - UInt(1)
val d_first = d_counter === UInt(0)
val d_last = d_counter === UInt(1) || d_beats1 === UInt(0)
val d_base = d_flight.base
val d_addr_hi = d_base >> shift | (d_beats1 & ~d_counter1)
val d_addr_hi = d_base >> shift | d_address_inc
val d_mask = edge.mask(d_base, d_size)
val d_fifo = edge.manager.hasFifoIdFast(d_flight.base)
@ -224,8 +215,6 @@ class TLRAMModel extends LazyModule
val d_valid = valid(d.source)
when (d_fire) {
d_counter := Mux(d_first, d_beats1, d_counter1)
// Check the response is correct
assert (d_size === d_flight.size)
assert (edge.manager.findIdStartFast(d_flight.base) <= d.sink)