100 lines
3.7 KiB
C
100 lines
3.7 KiB
C
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/*
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* gaInternal.h --
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*
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* This file defines data structures and constantds and declares
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* variables INTERNAL TO THE GAROUTER.
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* but shard by two or more soruce files.
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* *
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* Structures etc. that are exported by the irouter are defined in
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* irouter.h.
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*
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* Structures etc. that are local to a given source
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* file are declared at the top of that source file.
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*
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* Structures, etc., specific to a given function are usually defined at
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* the head of that function.
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*
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* *********************************************************************
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* * Copyright (C) 1985, 1990 Regents of the University of California. *
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* * Permission to use, copy, modify, and distribute this *
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* * software and its documentation for any purpose and without *
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* * fee is hereby granted, provided that the above copyright *
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* * notice appear in all copies. The University of California *
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* * makes no representations about the suitability of this *
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* * software for any purpose. It is provided "as is" without *
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* * express or implied warranty. Export of this software outside *
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* * of the United States of America may require an export license. *
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* *********************************************************************
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*
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* rcsid $Header: /usr/cvsroot/magic-8.0/garouter/gaInternal.h,v 1.1.1.1 2008/02/03 20:43:50 tim Exp $
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*/
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#ifndef _GAINTERNAL_H
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#define _GAINTERNAL_H
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#include "database/database.h"
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/* Sets limit on amount of searching before mzrouter gives up during
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* stem generation. The idea is not to waste time on routes that
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* fail. The number is the maximum number of "blooms" permit during
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* searching. See mzrouter documentation for details.
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*/
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#define MAZE_TIMEOUT 100;
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/*
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* Netlist structure.
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* This is similar to the netlist structures defined in the netmenu
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* package, but contains enough additional information that we
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* maintain our own here.
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*
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* Each netlist consists of a set of Net structures. These
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* point to a list of Terms that belong to the net.
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*/
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/*
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* A Term is a point from which routing proceeds.
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* It is possible for the same label to appear at several different
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* places in a cell. We assume that these points are connected
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* internally, and so only route to one. The one we choose for
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* routing appears on the net_terms list; all other Terms appear
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* on the term_others list.
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*/
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typedef struct term
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{
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Rect term_loc; /* Connect to anywhere in this area */
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TileType term_layer; /* What type of material */
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char *term_name; /* Pointer to HashEntry key, or NULL */
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struct net *term_net; /* Back-pointer to net */
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struct term *term_next; /* Next term in net */
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int term_flags; /* See below */
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struct term *term_others; /* Other valid starting points */
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} Term;
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/* Flags for above */
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#define TERM_FRINGE 0x01 /* Candidate for fringe routing */
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#define TERM_FEEDTHROUGH 0x02 /* Member of feedthrough list */
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#define TERM_ROUTED 0x04 /* Routed to rest of net */
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/* Everything in a Net is electrically identical */
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typedef struct net
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{
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struct net *net_next; /* Next net in nnl_netList */
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struct term *net_terms; /* List of Terms in this net */
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int net_prio; /* If > 0 then user-specified priority
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* with 1 meaning highest; if 0 then
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* no priority specified.
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* +++ NOT CURRENTLY USED +++
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*/
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} Net;
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/* A NetList specifies a set of connections to be made */
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typedef struct nnl
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{
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HashTable nnl_termHash; /* Map from names to Terms */
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struct net *nnl_netList; /* List of all Nets */
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} NewNetList;
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/* procedure declarations */
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extern bool gaMazeInit();
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#endif /* _GAINTERNAL_H */
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