mirror of
https://github.com/VLSIDA/OpenRAM.git
synced 2026-08-29 17:39:02 +02:00
Add bank_sel to bank_select module as input.
Remove reference to control in sram. Add dff_buf_array to options. Added inverted DFF Add variable height pinvbuf
This commit is contained in:
Matt Guthaus
@@ -0,0 +1,180 @@
|
||||
import debug
|
||||
import design
|
||||
from tech import drc
|
||||
from math import log
|
||||
from vector import vector
|
||||
from globals import OPTS
|
||||
import dff_inv
|
||||
|
||||
class dff_inv_array(design.design):
|
||||
"""
|
||||
This is a simple row (or multiple rows) of flops.
|
||||
Unlike the data flops, these are never spaced out.
|
||||
"""
|
||||
|
||||
def __init__(self, rows, columns, inv_size=2, name=""):
|
||||
self.rows = rows
|
||||
self.columns = columns
|
||||
|
||||
if name=="":
|
||||
name = "dff_array_{0}x{1}".format(rows, columns)
|
||||
design.design.__init__(self, name)
|
||||
debug.info(1, "Creating {}".format(self.name))
|
||||
|
||||
self.dff = dff_inv.dff_inv(inv_size)
|
||||
self.add_mod(self.dff)
|
||||
|
||||
self.width = self.columns * self.dff.width
|
||||
self.height = self.rows * self.dff.height
|
||||
|
||||
self.create_layout()
|
||||
|
||||
def create_layout(self):
|
||||
self.add_pins()
|
||||
self.create_dff_array()
|
||||
self.add_layout_pins()
|
||||
self.DRC_LVS()
|
||||
|
||||
def add_pins(self):
|
||||
for y in range(self.rows):
|
||||
for x in range(self.columns):
|
||||
self.add_pin(self.get_din_name(y,x))
|
||||
for y in range(self.rows):
|
||||
for x in range(self.columns):
|
||||
self.add_pin(self.get_dout_name(y,x))
|
||||
self.add_pin(self.get_dout_bar_name(y,x))
|
||||
self.add_pin("clk")
|
||||
self.add_pin("vdd")
|
||||
self.add_pin("gnd")
|
||||
|
||||
def create_dff_array(self):
|
||||
self.dff_insts={}
|
||||
for y in range(self.rows):
|
||||
for x in range(self.columns):
|
||||
name = "Xdff_r{0}_c{1}".format(y,x)
|
||||
if (y % 2 == 0):
|
||||
base = vector(x*self.dff.width,y*self.dff.height)
|
||||
mirror = "R0"
|
||||
else:
|
||||
base = vector(x*self.dff.width,(y+1)*self.dff.height)
|
||||
mirror = "MX"
|
||||
self.dff_insts[x,y]=self.add_inst(name=name,
|
||||
mod=self.dff,
|
||||
offset=base,
|
||||
mirror=mirror)
|
||||
self.connect_inst([self.get_din_name(y,x),
|
||||
self.get_dout_name(y,x),
|
||||
self.get_dout_bar_name(y,x),
|
||||
"clk",
|
||||
"vdd",
|
||||
"gnd"])
|
||||
|
||||
def get_din_name(self, row, col):
|
||||
if self.columns == 1:
|
||||
din_name = "din[{0}]".format(row)
|
||||
elif self.rows == 1:
|
||||
din_name = "din[{0}]".format(col)
|
||||
else:
|
||||
din_name = "din[{0}][{1}]".format(row,col)
|
||||
|
||||
return din_name
|
||||
|
||||
def get_dout_name(self, row, col):
|
||||
if self.columns == 1:
|
||||
dout_name = "dout[{0}]".format(row)
|
||||
elif self.rows == 1:
|
||||
dout_name = "dout[{0}]".format(col)
|
||||
else:
|
||||
dout_name = "dout[{0}][{1}]".format(row,col)
|
||||
|
||||
return dout_name
|
||||
|
||||
def get_dout_bar_name(self, row, col):
|
||||
if self.columns == 1:
|
||||
dout_bar_name = "dout_bar[{0}]".format(row)
|
||||
elif self.rows == 1:
|
||||
dout_bar_name = "dout_bar[{0}]".format(col)
|
||||
else:
|
||||
dout_bar_name = "dout_bar[{0}][{1}]".format(row,col)
|
||||
|
||||
return dout_bar_name
|
||||
|
||||
def add_layout_pins(self):
|
||||
|
||||
for y in range(self.rows):
|
||||
# Continous vdd rail along with label.
|
||||
vdd_pin=self.dff_insts[0,y].get_pin("vdd")
|
||||
self.add_layout_pin(text="vdd",
|
||||
layer="metal1",
|
||||
offset=vdd_pin.ll(),
|
||||
width=self.width,
|
||||
height=self.m1_width)
|
||||
|
||||
# Continous gnd rail along with label.
|
||||
gnd_pin=self.dff_insts[0,y].get_pin("gnd")
|
||||
self.add_layout_pin(text="gnd",
|
||||
layer="metal1",
|
||||
offset=gnd_pin.ll(),
|
||||
width=self.width,
|
||||
height=self.m1_width)
|
||||
|
||||
|
||||
for y in range(self.rows):
|
||||
for x in range(self.columns):
|
||||
din_pin = self.dff_insts[x,y].get_pin("D")
|
||||
debug.check(din_pin.layer=="metal2","DFF D pin not on metal2")
|
||||
self.add_layout_pin(text=self.get_din_name(y,x),
|
||||
layer=din_pin.layer,
|
||||
offset=din_pin.ll(),
|
||||
width=din_pin.width(),
|
||||
height=din_pin.height())
|
||||
|
||||
dout_pin = self.dff_insts[x,y].get_pin("Q")
|
||||
debug.check(dout_pin.layer=="metal2","DFF Q pin not on metal2")
|
||||
self.add_layout_pin(text=self.get_dout_name(y,x),
|
||||
layer=dout_pin.layer,
|
||||
offset=dout_pin.ll(),
|
||||
width=dout_pin.width(),
|
||||
height=dout_pin.height())
|
||||
|
||||
|
||||
dout_bar_pin = self.dff_insts[x,y].get_pin("Qb")
|
||||
debug.check(dout_bar_pin.layer=="metal2","DFF Qb pin not on metal2")
|
||||
self.add_layout_pin(text=self.get_dout_bar_name(y,x),
|
||||
layer=dout_bar_pin.layer,
|
||||
offset=dout_bar_pin.ll(),
|
||||
width=dout_bar_pin.width(),
|
||||
height=dout_bar_pin.height())
|
||||
|
||||
|
||||
# Create vertical spines to a single horizontal rail
|
||||
clk_pin = self.dff_insts[0,0].get_pin("clk")
|
||||
debug.check(clk_pin.layer=="metal2","DFF clk pin not on metal2")
|
||||
if self.columns==1:
|
||||
self.add_layout_pin(text="clk",
|
||||
layer="metal2",
|
||||
offset=clk_pin.ll().scale(1,0),
|
||||
width=self.m2_width,
|
||||
height=self.height)
|
||||
else:
|
||||
self.add_layout_pin(text="clk",
|
||||
layer="metal3",
|
||||
offset=vector(0,0),
|
||||
width=self.width,
|
||||
height=self.m3_width)
|
||||
for x in range(self.columns):
|
||||
clk_pin = self.dff_insts[x,0].get_pin("clk")
|
||||
# Make a vertical strip for each column
|
||||
self.add_layout_pin(text="clk",
|
||||
layer="metal2",
|
||||
offset=clk_pin.ll().scale(1,0),
|
||||
width=self.m2_width,
|
||||
height=self.height)
|
||||
# Drop a via to the M3 pin
|
||||
self.add_via_center(layers=("metal2","via2","metal3"),
|
||||
offset=clk_pin.center().scale(1,0))
|
||||
|
||||
|
||||
|
||||
def analytical_delay(self, slew, load=0.0):
|
||||
return self.dff.analytical_delay(slew=slew, load=load)
|
||||
Reference in New Issue
Block a user