Merge pull request #1609 from AcKoucher/test-nangate45_regenerate_rams

nangate45: update fakerams

Author: maliberty

flow/designs/nangate45/bp_be_top/fakeram.cfg

@@ -1,7 +1,21 @@
-# config file to drive BSG Black-box SRAM Generator
+# Configuration file to drive BSG Black-box SRAM Generator
 # https://github.com/bespoke-silicon-group/bsg_fakeram.git
-# using cherry's fork to fix bugs
-# https://github.com/jjcherry56/bsg_fakeram.git nangate45 branch
+# Using the following branch to correct bugs:
+# https://github.com/AcKoucher/bsg_fakeram.git nangate45 branch
+#
+# Not all fakerams' .lef/.lib we use in nangate45 designs were generated
+# using the default snapHeight specified in this .cfg, because the height
+# computed by the generator would result in not having enough available
+# tracks for the number of pins.
+#
+# For the exceptions below, we used a manually tuned height:
+#
+#   fakeram45_32x64     snapHeight_nm = 62000
+#   fakeram45_64x62     snapHeight_nm = 60500
+#   fakeram45_64x64     snapHeight_nm = 62200
+#   fakeram45_64x96     snapHeight_nm = 44700
+#   fakeram45_64x124    snapHeight_nm = 112600
+#   fakeram45_128x256   snapHeight_nm = 223900
 {
   # The process node. This is used to tell cacti what technology to use when
   # estimating power, performance and area numbers.
@@ -17,9 +31,11 @@
   "pinWidth_nm": 70,
 
   # The minimum pin pitch for signal pins (all pins will have a pitch that is a
-  # multuple of this pitch. The first pin will be a multiple of this pitch from
+  # multiple of this pitch). The first pin will be a multiple of this pitch from
   # the bottom edge of the macro too.
-  "pinPitch_nm": 210,
+  # The pin pitch must be a multiple of the track-grid pitch, otherwise we'll
+  # end up generating macros we can't snap to align with the latter.
+  "pinPitch_nm": 280,
 
   # Optional: snap the width and height of the sram to a multiple value.
   "snapWidth_nm":  190,
@@ -40,17 +56,27 @@
 
   # List of SRAM configurations (name, width, depth, and banks)
   "srams": [
-    {"name": "fakeram45_1024x32", "width":  32, "depth": 1024, "banks": 1},
-    {"name": "fakeram45_2048x39", "width":  39, "depth": 2048, "banks": 1},
-    {"name": "fakeram45_256x34", "width":  34, "depth": 256, "banks": 1},
-    {"name": "fakeram45_256x95", "width":  95, "depth": 256, "banks": 1},
-    {"name": "fakeram45_256x96", "width":  96, "depth": 256, "banks": 1},
-    {"name": "fakeram45_32x64", "width":  64, "depth": 32, "banks": 1},
-    {"name": "fakeram45_512x64", "width":  64, "depth": 512, "banks": 1},
-    {"name": "fakeram45_64x15", "width":  15, "depth": 64, "banks": 1},
-    {"name": "fakeram45_64x21", "width":  21, "depth": 64, "banks": 1},
-    {"name": "fakeram45_64x32", "width":  32, "depth": 64, "banks": 1},
-    {"name": "fakeram45_64x7", "width":  7, "depth": 64, "banks": 1},
-    {"name": "fakeram45_64x96", "width":  96, "depth": 64, "banks": 1}
+    {"name": "fakeram45_32x32",   "width": 32,  "depth": 32,   "banks": 1},
+    {"name": "fakeram45_32x64",   "width": 64,  "depth": 32,   "banks": 1},
+    {"name": "fakeram45_64x7",    "width": 7,   "depth": 64,   "banks": 1},
+    {"name": "fakeram45_64x15",   "width": 15,  "depth": 64,   "banks": 1},
+    {"name": "fakeram45_64x21",   "width": 21,  "depth": 64,   "banks": 1},
+    {"name": "fakeram45_64x32",   "width": 32,  "depth": 64,   "banks": 1},
+    {"name": "fakeram45_64x62",   "width": 62,  "depth": 64,   "banks": 1},
+    {"name": "fakeram45_64x64",   "width": 64,  "depth": 64,   "banks": 1},
+    {"name": "fakeram45_64x96",   "width": 96,  "depth": 64,   "banks": 1},
+    {"name": "fakeram45_64x124",  "width": 124, "depth": 64,   "banks": 1},
+    {"name": "fakeram45_128x32",  "width": 32,  "depth": 128,  "banks": 1},
+    {"name": "fakeram45_128x116", "width": 116, "depth": 128,  "banks": 1},
+    {"name": "fakeram45_128x256", "width": 256, "depth": 128,  "banks": 1},
+    {"name": "fakeram45_256x16",  "width": 16,  "depth": 256,  "banks": 1},
+    {"name": "fakeram45_256x32",  "width": 32,  "depth": 256,  "banks": 1},
+    {"name": "fakeram45_256x34",  "width": 34,  "depth": 256,  "banks": 1},
+    {"name": "fakeram45_256x48",  "width": 48,  "depth": 256,  "banks": 1},
+    {"name": "fakeram45_256x95",  "width": 95,  "depth": 256,  "banks": 1},
+    {"name": "fakeram45_256x96",  "width": 96,  "depth": 256,  "banks": 1},
+    {"name": "fakeram45_512x64",  "width": 64,  "depth": 512,  "banks": 1},
+    {"name": "fakeram45_1024x32", "width": 32,  "depth": 1024, "banks": 1},
+    {"name": "fakeram45_2048x39", "width": 39,  "depth": 2048, "banks": 1}
   ]
 }