def construct( s, PacketType, QueueType=None ):
# Local parameter
# gating_out = PacketType()
# TODO: add data gating support
# Interface
s.recv = RecvIfcRTL( PacketType )
s.send = SendIfcRTL( PacketType )
s.QueueType = QueueType
#---------------------------------------------------------------------
# If no queue type is assigned
#---------------------------------------------------------------------
if s.QueueType != None:
# Component
s.queue = QueueType( PacketType )
# Connections
s.recv //= s.queue.recv
s.queue.send //= s.send
#---------------------------------------------------------------------
# No ouput queue
#---------------------------------------------------------------------
else:
s.send //= s.recv
def construct(s,
PacketType,
QueueType=NormalQueueRTL,
vc=2,
credit_line=2):
# Local paramters
s.vc = vc
# Interface
# FIXME: Implement ISLIP so that only one send interface is needed
s.recv = CreditRecvIfcRTL(PacketType, vc=vc)
s.send = [SendIfcRTL(PacketType) for _ in range(vc)]
s.buffers = [
QueueType(PacketType, num_entries=credit_line) for _ in range(vc)
]
for i in range(vc):
s.buffers[i].recv.msg //= s.recv.msg
s.buffers[i].send //= s.send[i]
s.recv.yum[i] //= lambda: s.send[i].val & s.send[i].rdy
@update
def up_enq():
if s.recv.en:
for i in range(vc):
s.buffers[i].recv.val @= (s.recv.msg.vc_id == i)
else:
for i in range(vc):
s.buffers[i].recv.val @= 0
def construct(
s,
PacketType,
PositionType,
k_ary,
n_fly,
InputUnitType=InputUnitRTL,
RouteUnitType=DTRBflyRouteUnitRTL,
SwitchUnitType=SwitchUnitRTL,
OutputUnitType=OutputUnitRTL,
):
s.dim = PhysicalDimension()
s.num_inports = k_ary
s.num_outports = k_ary
# Interface
s.pos = InPort(PositionType)
s.recv = [RecvIfcRTL(PacketType) for _ in range(s.num_inports)]
s.send = [SendIfcRTL(PacketType) for _ in range(s.num_outports)]
# Components
s.input_units = [
InputUnitType(PacketType) for _ in range(s.num_inports)
]
s.route_units = [
RouteUnitType(PacketType,
PositionType,
s.num_outports,
n_fly=n_fly) for i in range(s.num_inports)
]
s.switch_units = [
SwitchUnitType(PacketType, s.num_inports)
for _ in range(s.num_outports)
]
s.output_units = [
OutputUnitType(PacketType) for _ in range(s.num_outports)
]
# Connection
for i in range(s.num_inports):
s.recv[i] //= s.input_units[i].recv
s.input_units[i].send //= s.route_units[i].recv
s.pos //= s.route_units[i].pos
for i in range(s.num_inports):
for j in range(s.num_outports):
s.route_units[i].send[j] //= s.switch_units[j].recv[i]
for j in range(s.num_outports):
s.switch_units[j].send //= s.output_units[j].recv
s.output_units[j].send //= s.send[j]
def construct(s, MsgType, vc=2, credit_line=1, QType=BypassQueueRTL):
assert vc > 1
# Interface
s.recv = CreditRecvIfcRTL(MsgType, vc)
s.send = SendIfcRTL(MsgType)
s.MsgType = MsgType
s.vc = vc
# Components
CreditType = mk_bits(clog2(credit_line + 1))
s.buffers = [
QType(MsgType, num_entries=credit_line) for _ in range(vc)
]
s.arbiter = RoundRobinArbiterEn(nreqs=vc)
s.encoder = Encoder(in_nbits=vc, out_nbits=clog2(vc))
for i in range(vc):
s.buffers[i].recv.msg //= s.recv.msg
s.buffers[i].send.val //= s.arbiter.reqs[i]
s.arbiter.grants //= s.encoder.in_
s.arbiter.en //= s.send.val
@update
def up_enq():
if s.recv.en:
for i in range(vc):
s.buffers[i].recv.val @= (s.recv.msg.vc_id == i)
else:
for i in range(vc):
s.buffers[i].recv.val @= 0
# TODO: add some assertions to make sure val/rdy are both high
# when they should.
@update
def up_deq_and_send():
for i in range(vc):
s.buffers[i].send.rdy @= 0
s.send.msg @= s.buffers[s.encoder.out].send.msg
if s.arbiter.grants > 0:
s.send.val @= 1
s.buffers[s.encoder.out].send.rdy @= 1
else:
s.send.val @= 0
@update
def up_yummy():
for i in range(vc):
s.recv.yum[i] @= s.buffers[i].recv.val & s.buffers[i].recv.rdy
def construct(s, Type, num_inports=1):
assert num_inports == 1, 'Null switch unit can only be used for single-input router!'
# Interface
s.recv = [RecvIfcRTL(Type) for _ in range(num_inports)]
s.hold = [InPort() for _ in range(num_inports)]
s.send = SendIfcRTL(Type)
connect(s.send, s.recv[0])
def construct(s, PacketType, QueueType=NormalQueueRTL):
# Interface
s.recv = RecvIfcRTL(PacketType)
s.send = SendIfcRTL(PacketType)
# Component
s.queue = QueueType(PacketType)
s.queue.recv //= s.recv
s.queue.send //= s.send
def construct(s, PacketType, PositionType, num_outports=8):
# Constants
s.num_outports = num_outports
TType = mk_bits(clog2(num_outports))
# Interface
s.recv = RecvIfcRTL(PacketType)
s.send = [SendIfcRTL(PacketType) for _ in range(s.num_outports)]
s.pos = InPort(PositionType)
# Componets
s.out_dir = Wire(mk_bits(clog2(num_outports)))
s.send_rdy = Wire(mk_bits(num_outports))
# Connections
for i in range(num_outports):
s.recv.msg //= s.send[i].msg
s.send_rdy[i] //= s.send[i].rdy
# Routing logic
@update
def up_ru_routing():
s.out_dir @= 0
for i in range(s.num_outports):
s.send[i].val @= Bits1(0)
if s.recv.val:
if (s.pos.pos_x == s.recv.msg.dst_x) & (s.pos.pos_y
== s.recv.msg.dst_y):
s.out_dir @= SELF + zext(s.recv.msg.dst_ter, TType)
elif s.recv.msg.dst_x < s.pos.pos_x:
s.out_dir @= WEST
elif s.recv.msg.dst_x > s.pos.pos_x:
s.out_dir @= EAST
elif s.recv.msg.dst_y < s.pos.pos_y:
s.out_dir @= SOUTH
else:
s.out_dir @= NORTH
s.send[s.out_dir].val @= Bits1(1)
@update
def up_ru_recv_rdy():
s.recv.rdy @= s.send_rdy[s.out_dir]
def construct( s,
PacketType,
num_inports = 2,
num_outports = 2,
InputUnitType = InputUnitRTL,
RouteUnitType = XbarRouteUnitRTL,
SwitchUnitType = SwitchUnitRTL,
OutputUnitType = OutputUnitRTL,
):
# Local parameter
s.num_inports = num_inports
s.num_outports = num_outports
# Special case for num_inports = 1
if num_inports == 1: SwitchUnitType = SwitchUnitNullRTL
# Interface
s.recv = [ RecvIfcRTL( PacketType ) for _ in range( s.num_inports ) ]
s.send = [ SendIfcRTL( PacketType ) for _ in range( s.num_outports ) ]
# Components
s.input_units = [ InputUnitType( PacketType )
for _ in range( s.num_inports ) ]
s.route_units = [ RouteUnitType( PacketType, s.num_outports )
for i in range( s.num_inports ) ]
s.switch_units = [ SwitchUnitType( PacketType, s.num_inports )
for _ in range( s.num_outports ) ]
s.output_units = [ OutputUnitType( PacketType )
for _ in range( s.num_outports ) ]
# Connections
for i in range( s.num_inports ):
s.recv[i] //= s.input_units[i].recv
s.input_units[i].send //= s.route_units[i].recv
for i in range( s.num_inports ):
for j in range( s.num_outports ):
s.route_units[i].send[j] //= s.switch_units[j].recv[i]
for j in range( s.num_outports ):
s.switch_units[j].send //= s.output_units[j].recv
s.output_units[j].send //= s.send[j]
def construct( s,
PacketType,
PositionType,
num_routers=4,
chl_lat=0,
vc=2,
credit_line=2,
):
# Constants
s.num_routers = num_routers
# IDType = mk_bits(clogs(num_routers))
# Interface
s.recv = [ RecvIfcRTL(PacketType) for _ in range(s.num_routers)]
s.send = [ SendIfcRTL(PacketType) for _ in range(s.num_routers)]
# Components
s.routers = [ RingRouterRTL( PacketType, PositionType, num_routers, vc=vc )
for i in range( num_routers ) ]
s.recv_adp = [ RecvRTL2CreditSendRTL( PacketType, vc=vc, credit_line=credit_line )
for _ in range( num_routers ) ]
s.send_adp = [ CreditRecvRTL2SendRTL( PacketType, vc=vc, credit_line=credit_line )
for _ in range( num_routers ) ]
# Connect s.routers together in ring
for i in range( s.num_routers ):
next_id = (i+1) % num_routers
s.routers[i].send[RIGHT] //= s.routers[next_id].recv[LEFT]
s.routers[next_id].send[LEFT] //= s.routers[i].recv[RIGHT]
# Connect the self port (with Network Interface)
s.recv[i] //= s.recv_adp[i].recv
s.recv_adp[i].send //= s.routers[i].recv[SELF]
s.routers[i].send[SELF] //= s.send_adp[i].recv
s.send_adp[i].send //= s.send[i]
@update
def up_pos():
for r in range( s.num_routers ):
s.routers[r].pos @= r
def construct(s, PacketType, QueueType=NormalQueueRTL, latency=0):
# Constant
s.dim = PhysicalDimension()
s.QueueType = QueueType
s.latency = latency
s.num_entries = 2
# Interface
s.recv = RecvIfcRTL(PacketType)
s.send = SendIfcRTL(PacketType)
#---------------------------------------------------------------------
# If latency > 0 and channel queue exists
#---------------------------------------------------------------------
if s.QueueType != None and s.latency > 0:
# Component
s.queues = [
s.QueueType(PacketType, s.num_entries)
for _ in range(s.latency)
]
# Connections
s.recv //= s.queues[0].recv
for i in range(s.latency - 1):
s.queues[i + 1].recv //= s.queues[i].send
s.queues[-1].send //= s.send
#---------------------------------------------------------------------
# If latency==0 simply bypass
#---------------------------------------------------------------------
else:
s.recv //= s.send
def construct( s, PacketType, num_outports ):
# Local parameters
dir_nbits = 1 if num_outports==1 else clog2( num_outports )
DirT = mk_bits( dir_nbits )
BitsN = mk_bits( num_outports )
# Interface
s.recv = RecvIfcRTL( PacketType )
s.send = [ SendIfcRTL( PacketType ) for _ in range( num_outports ) ]
# Componets
s.out_dir = Wire( DirT )
s.send_val = Wire( BitsN )
# Connections
for i in range( num_outports ):
s.recv.msg //= s.send[i].msg
s.send_val[i] //= s.send[i].val
# Routing logic
@update
def up_ru_routing():
s.out_dir @= trunc( s.recv.msg.dst, dir_nbits )
for i in range( num_outports ):
s.send[i].val @= b1(0)
if s.recv.val:
s.send[ s.out_dir ].val @= b1(1)
@update
def up_ru_recv_rdy():
s.recv.rdy @= s.send[ s.out_dir ].rdy > 0
def construct( s, PacketType, num_inports=5 ):
# Local parameters
s.num_inports = num_inports
s.sel_width = clog2( num_inports )
# Interface
s.recv = [ RecvIfcRTL( PacketType ) for _ in range( s.num_inports ) ]
s.send = SendIfcRTL( PacketType )
# Components
s.arbiter = RoundRobinArbiterEn( num_inports )
s.arbiter.en //= 1
s.mux = Mux( PacketType, num_inports )
s.mux.out //= s.send.msg
s.encoder = Encoder( num_inports, s.sel_width )
s.encoder.in_ //= s.arbiter.grants
s.encoder.out //= s.mux.sel
# Connections
for i in range( num_inports ):
s.recv[i].val //= s.arbiter.reqs[i]
s.recv[i].msg //= s.mux.in_[i]
@update
def up_send_val():
s.send.val @= s.arbiter.grants > 0
# TODO: assert at most one rdy bit
@update
def up_get_en():
for i in range( num_inports ):
s.recv[i].rdy @= s.send.rdy & ( s.mux.sel == i )
def construct( s, PacketType, PositionType, num_routers=4 ):
# Constants
s.num_outports = 3
s.num_routers = num_routers
DistType = mk_bits( clog2( num_routers ) )
s.last_idx = DistType( num_routers-1 )
# Interface
s.recv = RecvIfcRTL( PacketType )
s.send = [ SendIfcRTL (PacketType) for _ in range ( s.num_outports ) ]
s.pos = InPort( PositionType )
# Componets
s.out_dir = Wire( mk_bits( clog2( s.num_outports ) ) )
s.send_rdy = Wire( mk_bits( s.num_outports ) )
s.left_dist = Wire( DistType )
s.right_dist = Wire( DistType )
s.send_msg_wire = Wire( PacketType )
# Connections
for i in range( s.num_outports ):
s.send_rdy[i] //= s.send[i].rdy
# Routing logic
@update
def up_left_right_dist():
if s.recv.msg.dst < s.pos:
s.left_dist @= zext(s.pos, DistType) - zext(s.recv.msg.dst, DistType)
s.right_dist @= zext(s.last_idx, DistType) - zext(s.pos, DistType) + zext(s.recv.msg.dst, DistType) + 1
else:
s.left_dist @= 1 + zext(s.last_idx, DistType) + zext(s.pos, DistType) - zext(s.recv.msg.dst, DistType)
s.right_dist @= zext(s.recv.msg.dst, DistType) - zext(s.pos, DistType)
@update
def up_ru_routing():
s.out_dir @= 0
s.send_msg_wire @= s.recv.msg
for i in range( s.num_outports ):
s.send[i].val @= 0
if s.recv.val:
if s.pos == s.recv.msg.dst:
s.out_dir @= SELF
elif s.left_dist < s.right_dist:
s.out_dir @= LEFT
else:
s.out_dir @= RIGHT
if ( s.pos == s.last_idx ) & ( s.out_dir == RIGHT ):
s.send_msg_wire.vc_id @= 1
elif ( s.pos == 0 ) & ( s.out_dir == LEFT ):
s.send_msg_wire.vc_id @= 1
s.send[ s.out_dir ].val @= 1
s.send[ s.out_dir ].msg @= s.send_msg_wire
@update
def up_ru_recv_rdy():
s.recv.rdy @= s.send_rdy[ s.out_dir ]
def construct(s,
PacketType,
PositionType,
ncols=4,
nrows=4,
chl_lat=0,
vc=2,
credit_line=2):
# Constants
s.ncols = ncols
s.nrows = nrows
s.num_routers = ncols * nrows
s.num_terminals = s.num_routers
XType = mk_bits(clog2(ncols))
YType = mk_bits(clog2(nrows))
# Interface
s.recv = [RecvIfcRTL(PacketType) for _ in range(s.num_terminals)]
s.send = [SendIfcRTL(PacketType) for _ in range(s.num_terminals)]
# Components
s.routers = [
TorusRouterRTL(PacketType,
PositionType,
ncols=ncols,
nrows=nrows,
vc=vc,
credit_line=credit_line)
for i in range(s.num_routers)
]
s.recv_adapters = [
RecvRTL2CreditSendRTL(PacketType, vc=vc, credit_line=credit_line)
for _ in range(s.num_routers)
]
s.send_adapters = [
CreditRecvRTL2SendRTL(PacketType, vc=vc, credit_line=credit_line)
for _ in range(s.num_routers)
]
# Connect s.routers together in Torus
chl_id = 0
for i in range(s.num_routers):
s_idx = (i - nrows + s.num_routers) % s.num_routers
s.routers[i].send[SOUTH] //= s.routers[s_idx].recv[NORTH]
s.routers[i].send[NORTH] //=\
s.routers[(i+ncols+s.num_routers)%s.num_routers].recv[SOUTH]
s.routers[i].send[WEST] //=\
s.routers[i-(i%ncols-(i-1)%ncols)].recv[EAST]
s.routers[i].send[EAST] //=\
s.routers[i+(i+1)%ncols-i%ncols].recv[WEST]
# Connect the self port (with Network Interface)
s.recv[i] //= s.recv_adapters[i].recv
s.recv_adapters[i].send //= s.routers[i].recv[SELF]
s.routers[i].send[SELF] //= s.send_adapters[i].recv
s.send_adapters[i].send //= s.send[i]
# @update
# def up_pos():
for y in range(nrows):
for x in range(ncols):
# idx = y * ncols + x
# s.routers[idx].pos = PositionType( x, y )
s.routers[y * ncols + x].pos.pos_x //= XType(x)
s.routers[y * ncols + x].pos.pos_y //= YType(y)
def construct(s, PacketType, PositionType, k_ary, n_fly, chl_lat=0):
# Constants
s.dim = PhysicalDimension()
s.k_ary = k_ary
s.n_fly = n_fly
s.r_rows = k_ary**(n_fly - 1)
s.num_routers = n_fly * (s.r_rows)
s.num_terminals = k_ary**n_fly
num_channels = (n_fly - 1) * (s.r_rows) * k_ary
# Interface
s.recv = [RecvIfcRTL(PacketType) for _ in range(s.num_terminals)]
s.send = [SendIfcRTL(PacketType) for _ in range(s.num_terminals)]
# Components
s.routers = [
BflyRouterRTL(PacketType, PositionType, k_ary, n_fly)
for i in range(s.num_routers)
]
s.channels = [
ChannelRTL(PacketType, latency=chl_lat)
for _ in range(num_channels)
]
s.pos = [
PositionType(r % s.r_rows, r // s.r_rows)
for r in range(s.num_routers)
]
# Connect routers together in Butterfly
for r in range(s.num_routers):
s.routers[r].pos.row //= s.pos[r].row
s.routers[r].pos.stage //= s.pos[r].stage
chl_id = 0
terminal_id_recv = 0
terminal_id_send = 0
group_size = s.r_rows
for f in range(n_fly - 1):
num_group = s.r_rows // group_size
for g in range(num_group):
for gs in range(group_size):
for k in range(k_ary):
index = g * group_size + gs
base = g * group_size
interval = group_size // k_ary * k
router_left = f * s.r_rows + index
router_right = (f + 1) * s.r_rows + base + (
gs + interval) % group_size
group_left = router_left % s.r_rows
group_right = router_right % s.r_rows
group_left_x = group_left % k_ary
group_right_x = group_right % k_ary
group_left_y = group_left // k_ary
group_right_y = group_right // k_ary
rtr_idx = f * s.r_rows + index
ifc_tdx = (k + gs // (group_size // k_ary)) % k_ary
rtr_idx_n = (f + 1) * s.r_rows + base + (
gs + interval) % group_size
s.routers[rtr_idx].send[ifc_tdx] //= s.channels[
chl_id].recv
s.channels[chl_id].send //= s.routers[rtr_idx_n].recv[
k]
chl_id += 1
group_size = group_size // k_ary
# Connect the router ports with Network Interfaces
for i in range(s.num_routers):
if i < s.r_rows:
for j in range(k_ary):
s.recv[terminal_id_recv] //= s.routers[i].recv[j]
terminal_id_recv += 1
if i >= s.num_routers - s.r_rows:
for j in range(k_ary):
s.send[terminal_id_send] //= s.routers[i].send[j]
terminal_id_send += 1
def construct(s, PacketType, PositionType, ncols=2, nrows=2):
# Constants
num_outports = 5
s.ncols = ncols
s.nrows = nrows
# Here we add 1 to avoid overflow
posx_type = mk_bits(clog2(ncols))
posy_type = mk_bits(clog2(nrows))
ns_dist_type = mk_bits(clog2(nrows + 1))
we_dist_type = mk_bits(clog2(ncols + 1))
s.last_row_id = nrows - 1
s.last_col_id = ncols - 1
# Interface
s.recv = RecvIfcRTL(PacketType)
s.send = [SendIfcRTL(PacketType) for _ in range(num_outports)]
s.pos = InPort(PositionType)
# Componets
s.out_dir = Wire(Bits3)
s.send_rdy = Wire(Bits5)
s.turning = Wire(Bits1)
s.north_dist = Wire(ns_dist_type)
s.south_dist = Wire(ns_dist_type)
s.west_dist = Wire(we_dist_type)
s.east_dist = Wire(we_dist_type)
s.send_msg_wire = Wire(PacketType)
# Connections
for i in range(num_outports):
s.send_rdy[i] //= s.send[i].rdy
s.send_msg_wire //= s.send[i].msg
# Calculate distance
@update
def up_ns_dist():
if s.recv.msg.dst_y < s.pos.pos_y:
s.south_dist @= zext(s.pos.pos_y, ns_dist_type) - zext(
s.recv.msg.dst_y, ns_dist_type)
s.north_dist @= s.last_row_id - zext(
s.pos.pos_y, ns_dist_type) + 1 + zext(
s.recv.msg.dst_y, ns_dist_type)
else:
s.south_dist @= zext(s.pos.pos_y,
ns_dist_type) + 1 + s.last_row_id - zext(
s.recv.msg.dst_y, ns_dist_type)
s.north_dist @= zext(s.recv.msg.dst_y, ns_dist_type) - zext(
s.pos.pos_y, ns_dist_type)
@update
def up_we_dist():
if s.recv.msg.dst_x < s.pos.pos_x:
s.west_dist @= zext(s.pos.pos_x, we_dist_type) - zext(
s.recv.msg.dst_x, we_dist_type)
s.east_dist @= s.last_col_id - zext(
s.pos.pos_x, we_dist_type) + 1 + zext(
s.recv.msg.dst_x, we_dist_type)
else:
s.west_dist @= zext(s.pos.pos_x,
we_dist_type) + 1 + s.last_col_id - zext(
s.recv.msg.dst_x, we_dist_type)
s.east_dist @= zext(s.recv.msg.dst_x, we_dist_type) - zext(
s.pos.pos_x, we_dist_type)
# Routing logic
@update
def up_ru_routing():
s.send_msg_wire @= s.recv.msg
s.out_dir @= 0
s.turning @= 0
for i in range(num_outports):
s.send[i].val @= 0
if s.recv.val:
if (s.pos.pos_x == s.recv.msg.dst_x) & (s.pos.pos_y
== s.recv.msg.dst_y):
s.out_dir @= SELF
elif s.recv.msg.dst_y != s.pos.pos_y:
s.out_dir @= NORTH if s.north_dist < s.south_dist else SOUTH
else:
s.out_dir @= WEST if s.west_dist < s.east_dist else EAST
# Turning logic
s.turning @= ( s.recv.msg.src_x == s.pos.pos_x ) & \
( s.recv.msg.src_y != s.pos.pos_y ) & \
( s.out_dir == WEST ) | ( s.out_dir == EAST )
# Dateline logic
if s.turning:
s.send_msg_wire.vc_id @= 0
if (s.pos.pos_x == 0) & (s.out_dir == WEST):
s.send_msg_wire.vc_id @= 1
elif (s.pos.pos_x == s.last_col_id) & (s.out_dir == EAST):
s.send_msg_wire.vc_id @= 1
elif (s.pos.pos_y == 0) & (s.out_dir == SOUTH):
s.send_msg_wire.vc_id @= 1
elif (s.pos.pos_y == s.last_row_id) & (s.out_dir == NORTH):
s.send_msg_wire.vc_id @= 1
s.send[s.out_dir].val @= 1
@update
def up_ru_recv_rdy():
s.recv.rdy @= s.send[s.out_dir].rdy
def construct(s,
PacketType,
PositionType,
ncols=4,
nrows=4,
num_nodes_each=4,
chl_lat=0):
# Constants
s.num_routers = ncols * nrows
s.num_terminals = s.num_routers * num_nodes_each
num_channels = (nrows * (ncols - 1) + ncols * (nrows - 1)) * 2
num_inports = 4 + num_nodes_each
num_outports = 4 + num_nodes_each
XType = mk_bits(clog2(ncols))
YType = mk_bits(clog2(nrows))
# Interface
s.recv = [RecvIfcRTL(PacketType) for _ in range(s.num_terminals)]
s.send = [SendIfcRTL(PacketType) for _ in range(s.num_terminals)]
# Components
s.routers = [
CMeshRouterRTL(PacketType, PositionType, num_inports, num_outports)
for i in range(s.num_routers)
]
s.channels = [
ChannelRTL(PacketType, latency=chl_lat)
for _ in range(num_channels)
]
# Connect s.routers together in Mesh
# FIXME: we need to calculate the bit width for directions. Currently
# the translation pass may throw an error.
chl_id = 0
for i in range(s.num_routers):
if i // ncols > 0:
s.routers[i].send[SOUTH] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i - ncols].recv[NORTH]
chl_id += 1
if i // ncols < nrows - 1:
s.routers[i].send[NORTH] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i + ncols].recv[SOUTH]
chl_id += 1
if i % ncols > 0:
s.routers[i].send[WEST] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i - 1].recv[EAST]
chl_id += 1
if i % ncols < ncols - 1:
s.routers[i].send[EAST] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i + 1].recv[WEST]
chl_id += 1
# Connect the self port (with Network Interface)
for j in range(num_nodes_each):
ifc_idx = i * num_nodes_each + j
s.recv[ifc_idx] //= s.routers[i].recv[4 + j]
s.send[ifc_idx] //= s.routers[i].send[4 + j]
# Connect the unused ports
if i // ncols == 0:
s.routers[i].send[SOUTH].rdy //= 0
s.routers[i].recv[SOUTH].val //= 0
s.routers[i].recv[SOUTH].msg.payload //= 0
if i // ncols == nrows - 1:
s.routers[i].send[NORTH].rdy //= 0
s.routers[i].recv[NORTH].val //= 0
s.routers[i].recv[NORTH].msg.payload //= 0
if i % ncols == 0:
s.routers[i].send[WEST].rdy //= 0
s.routers[i].recv[WEST].val //= 0
s.routers[i].recv[WEST].msg.payload //= 0
if i % ncols == ncols - 1:
s.routers[i].send[EAST].rdy //= 0
s.routers[i].recv[EAST].val //= 0
s.routers[i].recv[EAST].msg.payload //= 0
for y in range(nrows):
for x in range(ncols):
s.routers[y * ncols + x].pos //= PositionType(x, y)
def construct(s, PacketType, PositionType, ncols=4, nrows=4, chl_lat=0):
# Local parameters
s.num_routers = ncols * nrows
s.num_terminals = s.num_routers
num_channels = (nrows * (ncols - 1) + ncols * (nrows - 1)) * 2
XType = mk_bits(clog2(ncols))
YType = mk_bits(clog2(nrows))
# Interface
s.recv = [RecvIfcRTL(PacketType) for _ in range(s.num_terminals)]
s.send = [SendIfcRTL(PacketType) for _ in range(s.num_terminals)]
# Components
s.routers = [
MeshRouterRTL(PacketType, PositionType)
for _ in range(s.num_routers)
]
s.channels = [
ChannelRTL(PacketType, latency=chl_lat)
for _ in range(num_channels)
]
# Wire the position ports of router
for y in range(nrows):
for x in range(ncols):
s.routers[y * ncols + x].pos.pos_x //= x
s.routers[y * ncols + x].pos.pos_y //= y
# Connect routers together in Mesh
# NOTE: for now we put all channels in a single list. In the future we
# may want to divide channels into different groups so that it is
# easier to configure.
chl_id = 0
for i in range(s.num_routers):
if i // ncols > 0:
s.routers[i].send[SOUTH] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i - ncols].recv[NORTH]
chl_id += 1
if i // ncols < nrows - 1:
s.routers[i].send[NORTH] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i + ncols].recv[SOUTH]
chl_id += 1
if i % ncols > 0:
s.routers[i].send[WEST] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i - 1].recv[EAST]
chl_id += 1
if i % ncols < ncols - 1:
s.routers[i].send[EAST] //= s.channels[chl_id].recv
s.channels[chl_id].send //= s.routers[i + 1].recv[WEST]
chl_id += 1
# Connect the self port (with Network Interface)
s.recv[i] //= s.routers[i].recv[SELF]
s.send[i] //= s.routers[i].send[SELF]
# Connect the unused ports
# FIXME: for now we hackily ground the payload field so that pymtl
# won't complain about net need driver.
if i // ncols == 0:
s.routers[i].send[SOUTH].rdy //= 0
s.routers[i].recv[SOUTH].val //= 0
s.routers[i].recv[SOUTH].msg.payload //= 0
if i // ncols == nrows - 1:
s.routers[i].send[NORTH].rdy //= 0
s.routers[i].recv[NORTH].val //= 0
s.routers[i].recv[NORTH].msg.payload //= 0
if i % ncols == 0:
s.routers[i].send[WEST].rdy //= 0
s.routers[i].recv[WEST].val //= 0
s.routers[i].recv[WEST].msg.payload //= 0
if i % ncols == ncols - 1:
s.routers[i].send[EAST].rdy //= 0
s.routers[i].recv[EAST].val //= 0
s.routers[i].recv[EAST].msg.payload //= 0