vlsi:icc:io-blockage

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+====== Add Placement & Route Blockage to IO Cells ======
+===== Scripts =====
+<code tcl>
+###  NOTE : WARNING
+###
+###  add_io_cover takes two arguments.  The first is the hard blockage distance
+###  around the io.  The second is the amount the PG route guide is INSET from
+###  that blockage -- a number picked to be slightly larger than half the standard
+###  cell PG rail width.  The reason for the inset is to prevent a situation where
+###  placement rows wind up without a PG rail.
+###  d = blockage border [one row default], e is half M1 pwr rail width + margin
+proc add_io_cover { d e } {
+  set x 0
+  foreach_in_collection c [get_cells -hier -all -filter "is_io==true"] {
+    set coord [get_attribute $c bbox]
+    set low_x [expr [lindex [lindex $coord 0] 0] - $d]
+    set low_y [expr [lindex [lindex $coord 0] 1] - $d]
+    set high_x [expr [lindex [lindex $coord 1] 0] + $d]
+    set high_y [expr [lindex [lindex $coord 1] 1] + $d]
+    create_placement_blockage -bbox "$low_x $low_y $high_x $high_y" -type hard -name IoBlockH_$x
+    set newCord [list [list [expr $low_x  + $e ] [expr $low_y  + $e ]] [list [expr $high_x - $e ] [expr $high_y - $e ]] ]
+    create_route_guide -name IoBlockR_$x -no_preroute_layers {M1 M2 M3 M4 M5 M6 M7 M8} -coordinate $newCord -no_snap
+    incr x
+  }
+}
+add_io_cover 1.8 0.14
+</code>

vlsi/icc/io-blockage.txt · 最后更改: 2011/04/20 06:20 (外部编辑)