Draft local and global arrays. Ensure rows before cols in usage.

compiler/modules/bitcell_array.py

@@ -17,8 +17,8 @@ class bitcell_array(bitcell_base_array):
     and word line is connected by abutment.
     Connects the word lines and bit lines.
     """
-    def __init__(self, cols, rows, name, column_offset=0):
-        super().__init__(cols, rows, name, column_offset)
+    def __init__(self, rows, cols, column_offset=0, name=""):
+        super().__init__(rows=rows, cols=cols, column_offset=column_offset, name=name)
 
         self.create_netlist()
         if not OPTS.netlist_only:
@@ -57,8 +57,8 @@ class bitcell_array(bitcell_base_array):
                 name = "bit_r{0}_c{1}".format(row, col)
                 self.cell_inst[row, col]=self.add_inst(name=name,
                                                        mod=self.cell)
-                self.connect_inst(self.get_bitcell_pins(col, row))
-        
+                self.connect_inst(self.get_bitcell_pins(row, col))
+                
     def analytical_power(self, corner, load):
         """Power of Bitcell array and bitline in nW."""
         

compiler/modules/bitcell_base_array.py

@@ -14,7 +14,7 @@ class bitcell_base_array(design.design):
     """
     Abstract base class for bitcell-arrays -- bitcell, dummy
     """
-    def __init__(self, cols, rows, name, column_offset):
+    def __init__(self, name, rows, cols, column_offset):
         design.design.__init__(self, name)
         debug.info(1, "Creating {0} {1} x {2}".format(self.name, rows, cols))
         self.add_comment("rows: {0} cols: {1}".format(rows, cols))
@@ -61,7 +61,7 @@ class bitcell_base_array(design.design):
         self.add_pin("vdd", "POWER")
         self.add_pin("gnd", "GROUND")
 
-    def get_bitcell_pins(self, col, row):
+    def get_bitcell_pins(self, row, col):
         """ Creates a list of connections in the bitcell,
         indexed by column and row, for instance use in bitcell_array """
 

compiler/modules/col_cap_array.py

@@ -50,9 +50,9 @@ class col_cap_array(bitcell_base_array):
                 name = "bit_r{0}_c{1}".format(row, col)
                 self.cell_inst[row, col]=self.add_inst(name=name,
                                                        mod=self.dummy_cell)
-                self.connect_inst(self.get_bitcell_pins(col, row))
+                self.connect_inst(self.get_bitcell_pins(row, col))
 
-    def get_bitcell_pins(self, col, row):
+    def get_bitcell_pins(self, row, col):
         """
         Creates a list of connections in the bitcell,
         indexed by column and row, for instance use in bitcell_array

compiler/modules/dummy_array.py

@@ -12,8 +12,8 @@ class dummy_array(bitcell_base_array):
     """
     Generate a dummy row/column for the replica array.
     """
-    def __init__(self, cols, rows, column_offset=0, mirror=0, name=""):
-        super().__init__(cols, rows, name, column_offset)
+    def __init__(self, rows, cols, column_offset=0, mirror=0, name=""):
+        super().__init__(rows=rows, cols=cols, column_offset=column_offset, name=name)
         self.mirror = mirror
 
         self.create_netlist()
@@ -51,7 +51,7 @@ class dummy_array(bitcell_base_array):
                 name = "bit_r{0}_c{1}".format(row, col)
                 self.cell_inst[row, col]=self.add_inst(name=name,
                                                        mod=self.dummy_cell)
-                self.connect_inst(self.get_bitcell_pins(col, row))
+                self.connect_inst(self.get_bitcell_pins(row, col))
 
     def input_load(self):
         wl_wire = self.gen_wl_wire()

compiler/modules/global_bitcell_array.py

@@ -0,0 +1,66 @@
+# See LICENSE for licensing information.
+#
+# Copyright (c) 2016-2019 Regents of the University of California and The Board
+# of Regents for the Oklahoma Agricultural and Mechanical College
+# (acting for and on behalf of Oklahoma State University)
+# All rights reserved.
+#
+from bitcell_base_array import bitcell_base_array
+from tech import drc, spice
+from globals import OPTS
+from sram_factory import factory
+import debug
+
+class global_bitcell_array(bitcell_base_array):
+    """
+    Creates a global bitcell array with a number
+    of local arrays of a sizes given by a tuple in the list.
+    """
+    def __init__(self, sizes, name=""):
+        # Each bank will have the same number of rows
+        self.rows = sizes[0][0]
+        for (r, c) in sizes:
+            debug.check(r[0] == self.rows, "Cannot have non-uniform number of rows in global array.")
+        # The total of all columns will be the number of columns
+        self.cols = sum(x[1] for x in sizes)
+        self.sizes = sizes
+        super().__init__(rows=self.rows, cols=self.cols, name=name)
+
+        self.create_netlist()
+        if not OPTS.netlist_only:
+            self.create_layout()
+        
+    def create_netlist(self):
+        """ Create and connect the netlist """
+        self.add_modules()
+        self.add_pins()
+        self.create_instances()
+
+    def create_layout(self):
+
+        self.place()
+
+        self.add_layout_pins()
+
+        self.add_boundary()
+        
+        self.DRC_LVS()
+
+    def add_modules(self):
+        """ Add the modules used in this design """
+        self.local_mods = []
+        for (row, col) in self.sizes:
+            la = factory.create(module_type="local_bitcell_array", rows=row, cols=col)
+            self.add_mod(la)
+            self.local_mods.append(la)
+
+    def create_instances(self):
+        """ Create the module instances used in this design """
+        self.local_inst = {}
+        for i in range(self.sizes):
+            name = "local_array_{0}".format(i)
+                self.local_inst.append(self.add_inst(name=name,
+                                                     mod=self.local_mods[i])
+                self.connect_inst(self.get_bitcell_pins(row, col))
+        
+ 

compiler/modules/local_bitcell_array.py

@@ -0,0 +1,66 @@
+# See LICENSE for licensing information.
+#
+# Copyright (c) 2016-2019 Regents of the University of California and The Board
+# of Regents for the Oklahoma Agricultural and Mechanical College
+# (acting for and on behalf of Oklahoma State University)
+# All rights reserved.
+#
+from bitcell_base_array import bitcell_base_array
+from tech import drc, spice
+from globals import OPTS
+from sram_factory import factory
+
+
+class local_bitcell_array(bitcell_base_array):
+    """
+    A local wordline array is a bitcell array with a wordline driver.
+    This can either be a single aray on its own if there is no hierarchical WL
+    or it can be combined into a larger array with hierarchical WL.
+    """
+    def __init__(self, name, rows, cols):
+        super().__init__(name, rows, cols)
+
+        self.create_netlist()
+        if not OPTS.netlist_only:
+            self.create_layout()
+
+        # We don't offset this because we need to align
+        # the replica bitcell in the control logic
+        # self.offset_all_coordinates()
+        
+    def create_netlist(self):
+        """ Create and connect the netlist """
+        self.add_modules()
+        self.add_pins()
+        self.create_instances()
+
+    def create_layout(self):
+
+        self.place_array("bit_r{0}_c{1}")
+
+        self.add_layout_pins()
+
+        self.add_boundary()
+        
+        self.DRC_LVS()
+
+    def add_modules(self):
+        """ Add the modules used in this design """
+        self.bit_array = factory.create(module_type="bitcell_array",
+                                        rows=self.rows,
+                                        cols=self.cols,
+                                        column_offset=self.column_offset)
+        self.add_mod(self.bit_array)
+
+        self.wl_array = factory.create(module_type="wordline_driver_array",
+                                       rows=self.rows,
+                                       cols=self.cols)
+        self.add_mod(self.wl_array)
+        
+    def create_instances(self):
+        """ Create the module instances used in this design """
+        self.bitcell_inst = self.add_inst(mod=self.bitcell_array)
+        self.connect_inst(self.get_bitcell_pins(row, col))
+        self.wl_inst = self.add_inst(mod=self.wl_array)
+        self.connect_inst(self.get_bitcell_pins(row, col))
+        

compiler/modules/replica_bitcell_array.py

@@ -21,7 +21,7 @@ class replica_bitcell_array(design.design):
     Requires a regular bitcell array, replica bitcell, and dummy
     bitcell (Bl/BR disconnected).
     """
-    def __init__(self, cols, rows, left_rbl, right_rbl, bitcell_ports, name):
+    def __init__(self, rows, cols, left_rbl, right_rbl, bitcell_ports, name):
         design.design.__init__(self, name)
         debug.info(1, "Creating {0} {1} x {2}".format(self.name, rows, cols))
         self.add_comment("rows: {0} cols: {1}".format(rows, cols))

compiler/modules/replica_column.py

@@ -102,22 +102,22 @@ class replica_column(design.design):
             if (row > self.left_rbl and row < self.total_size - self.right_rbl - 1):
                 self.cell_inst[row]=self.add_inst(name=name,
                                                   mod=self.replica_cell)
-                self.connect_inst(self.get_bitcell_pins(0, row))
+                self.connect_inst(self.get_bitcell_pins(row, 0))
             elif row==self.replica_bit:
                 self.cell_inst[row]=self.add_inst(name=name,
                                                   mod=self.replica_cell)
-                self.connect_inst(self.get_bitcell_pins(0, row))
+                self.connect_inst(self.get_bitcell_pins(row, 0))
             elif (row == 0 or row == self.total_size - 1):
                 self.cell_inst[row]=self.add_inst(name=name,
                                                   mod=self.edge_cell)
                 if end_caps_enabled:
-                    self.connect_inst(self.get_bitcell_pins_col_cap(0, row))
+                    self.connect_inst(self.get_bitcell_pins_col_cap(row, 0))
                 else:
-                    self.connect_inst(self.get_bitcell_pins(0, row))
+                    self.connect_inst(self.get_bitcell_pins(row, 0))
             else:
                 self.cell_inst[row]=self.add_inst(name=name,
                                                   mod=self.dummy_cell)
-                self.connect_inst(self.get_bitcell_pins(0, row))
+                self.connect_inst(self.get_bitcell_pins(row, 0))
 
     def place_instances(self):
         from tech import cell_properties
@@ -191,7 +191,7 @@ class replica_column(design.design):
                 else:
                     self.copy_layout_pin(inst, pin_name)
 
-    def get_bitcell_pins(self, col, row):
+    def get_bitcell_pins(self, row, col):
         """ Creates a list of connections in the bitcell,
         indexed by column and row, for instance use in bitcell_array """
 
@@ -208,7 +208,7 @@ class replica_column(design.design):
 
         return bitcell_pins
 
-    def get_bitcell_pins_col_cap(self, col, row):
+    def get_bitcell_pins_col_cap(self, row, col):
         """ Creates a list of connections in the bitcell,
         indexed by column and row, for instance use in bitcell_array """
 

compiler/modules/row_cap_array.py

@@ -49,9 +49,9 @@ class row_cap_array(bitcell_base_array):
                 name = "bit_r{0}_c{1}".format(row, col)
                 self.cell_inst[row, col]=self.add_inst(name=name,
                                                        mod=self.dummy_cell)
-                self.connect_inst(self.get_bitcell_pins(col, row))
+                self.connect_inst(self.get_bitcell_pins(row, col))
 
-    def get_bitcell_pins(self, col, row):
+    def get_bitcell_pins(self, row, col):
         """
         Creates a list of connections in the bitcell,
         indexed by column and row, for instance use in bitcell_array

compiler/modules/wordline_buffer_array.py

@@ -0,0 +1,137 @@
+# See LICENSE for licensing information.
+#
+# Copyright (c) 2016-2019 Regents of the University of California and The Board
+# of Regents for the Oklahoma Agricultural and Mechanical College
+# (acting for and on behalf of Oklahoma State University)
+# All rights reserved.
+#
+import debug
+import design
+from tech import drc, layer
+from vector import vector
+from sram_factory import factory
+from globals import OPTS
+
+
+class wordline_buffer_array(design.design):
+    """
+    Creates a Wordline Buffer/Inverter array
+    """
+
+    def __init__(self, name, rows, cols):
+        design.design.__init__(self, name)
+        debug.info(1, "Creating {0}".format(self.name))
+        self.add_comment("rows: {0} cols: {1}".format(rows, cols))
+        
+        self.rows = rows
+        self.cols = cols
+
+        self.create_netlist()
+        if not OPTS.netlist_only:
+            self.create_layout()
+
+    def create_netlist(self):
+        self.add_modules()
+        self.add_pins()
+        self.create_drivers()
+        
+    def create_layout(self):
+        if "li" in layer:
+            self.route_layer = "li"
+        else:
+            self.route_layer = "m1"
+        self.place_drivers()
+        self.route_layout()
+        self.route_vdd_gnd()
+        self.offset_all_coordinates()
+        self.add_boundary()
+        self.DRC_LVS()
+        
+    def add_pins(self):
+        # inputs to wordline_driver.
+        for i in range(self.rows):
+            self.add_pin("in_{0}".format(i), "INPUT")
+        # Outputs from wordline_driver.
+        for i in range(self.rows):
+            self.add_pin("wl_{0}".format(i), "OUTPUT")
+        self.add_pin("vdd", "POWER")
+        self.add_pin("gnd", "GROUND")
+
+    def add_modules(self):
+        self.wl_driver = factory.create(module_type="inv_dec",
+                                        size=self.cols)
+        self.add_mod(self.wl_driver)
+        
+    def route_vdd_gnd(self):
+        """
+        Add a pin for each row of vdd/gnd which
+        are must-connects next level up.
+        """
+        if OPTS.tech_name == "sky130":
+            for name in ["vdd", "gnd"]:
+                supply_pins = self.wld_inst[0].get_pins(name)
+                for pin in supply_pins:
+                    self.add_layout_pin_segment_center(text=name,
+                                                       layer=pin.layer,
+                                                       start=pin.bc(),
+                                                       end=vector(pin.cx(), self.height))
+        else:
+            # Find the x offsets for where the vias/pins should be placed
+            xoffset_list = [self.wld_inst[0].rx()]
+            for num in range(self.rows):
+                # this will result in duplicate polygons for rails, but who cares
+                
+                # use the inverter offset even though it will be the and's too
+                (gate_offset, y_dir) = self.get_gate_offset(0,
+                                                            self.wl_driver.height,
+                                                            num)
+                # Route both supplies
+                for name in ["vdd", "gnd"]:
+                    supply_pin = self.wld_inst[num].get_pin(name)
+                    
+                    # Add pins in two locations
+                    for xoffset in xoffset_list:
+                        pin_pos = vector(xoffset, supply_pin.cy())
+                        self.add_power_pin(name, pin_pos)
+            
+    def create_drivers(self):
+        self.wld_inst = []
+        for row in range(self.rows):
+            self.wld_inst.append(self.add_inst(name="wld{0}".format(row),
+                                               mod=self.wl_driver))
+            self.connect_inst(["in_{0}".format(row),
+                               "wl_{0}".format(row),
+                               "vdd", "gnd"])
+
+    def place_drivers(self):
+
+        for row in range(self.rows):
+            if (row % 2):
+                y_offset = self.wl_driver.height * (row + 1)
+                inst_mirror = "MX"
+            else:
+                y_offset = self.wl_driver.height * row
+                inst_mirror = "R0"
+
+            offset = [0, y_offset]
+            
+            self.wld_inst[row].place(offset=offset,
+                                     mirror=inst_mirror)
+
+        self.width = self.wl_driver.width
+        self.height = self.wl_driver.height * self.rows
+
+    def route_layout(self):
+        """ Route all of the signals """
+
+        for row in range(self.rows):
+            inst = self.wld_inst[row]
+
+            self.copy_layout_pin(inst, "A", "in_{0}".format(row))
+
+            # output each WL on the right
+            wl_offset = inst.get_pin("Z").rc()
+            self.add_layout_pin_segment_center(text="wl_{0}".format(row),
+                                               layer=self.route_layer,
+                                               start=wl_offset,
+                                               end=wl_offset - vector(self.m1_width, 0))

compiler/modules/wordline_driver_array.py

@@ -12,6 +12,7 @@ from vector import vector
 from sram_factory import factory
 from globals import OPTS
 
+
 class wordline_driver_array(design.design):
     """
     Creates a Wordline Driver

compiler/tests/08_wordline_buffer_array_test.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+# See LICENSE for licensing information.
+#
+# Copyright (c) 2016-2019 Regents of the University of California and The Board
+# of Regents for the Oklahoma Agricultural and Mechanical College
+# (acting for and on behalf of Oklahoma State University)
+# All rights reserved.
+#
+import unittest
+from testutils import *
+import sys,os
+sys.path.append(os.getenv("OPENRAM_HOME"))
+import globals
+from globals import OPTS
+from sram_factory import factory
+import debug
+
+
+class wordline_buffer_array_test(openram_test):
+
+    def runTest(self):
+        config_file = "{}/tests/configs/config".format(os.getenv("OPENRAM_HOME"))
+        globals.init_openram(config_file)
+
+        # check wordline driver for single port
+        debug.info(2, "Checking driver")
+        tx = factory.create(module_type="wordline_buffer_array", rows=8, cols=32)
+        self.local_check(tx)
+
+        globals.end_openram()
+
+# run the test from the command line
+if __name__ == "__main__":
+    (OPTS, args) = globals.parse_args()
+    del sys.argv[1:]
+    header(__file__, OPTS.tech_name)
+    unittest.main(testRunner=debugTestRunner())