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sst/core/techModels/libsim-panalyzer/resource.h

00001 /*
00002  * resource.h - resource manager interfaces
00003  *
00004  * This file is a part of the SimpleScalar tool suite written by
00005  * Todd M. Austin as a part of the Multiscalar Research Project.
00006  *  
00007  * The tool suite is currently maintained by Doug Burger and Todd M. Austin.
00008  * 
00009  * Copyright (C) 1994, 1995, 1996, 1997, 1998 by Todd M. Austin
00010  *
00011  * This source file is distributed "as is" in the hope that it will be
00012  * useful.  The tool set comes with no warranty, and no author or
00013  * distributor accepts any responsibility for the consequences of its
00014  * use. 
00015  * 
00016  * Everyone is granted permission to copy, modify and redistribute
00017  * this tool set under the following conditions:
00018  * 
00019  *    This source code is distributed for non-commercial use only. 
00020  *    Please contact the maintainer for restrictions applying to 
00021  *    commercial use.
00022  *
00023  *    Permission is granted to anyone to make or distribute copies
00024  *    of this source code, either as received or modified, in any
00025  *    medium, provided that all copyright notices, permission and
00026  *    nonwarranty notices are preserved, and that the distributor
00027  *    grants the recipient permission for further redistribution as
00028  *    permitted by this document.
00029  *
00030  *    Permission is granted to distribute this file in compiled
00031  *    or executable form under the same conditions that apply for
00032  *    source code, provided that either:
00033  *
00034  *    A. it is accompanied by the corresponding machine-readable
00035  *       source code,
00036  *    B. it is accompanied by a written offer, with no time limit,
00037  *       to give anyone a machine-readable copy of the corresponding
00038  *       source code in return for reimbursement of the cost of
00039  *       distribution.  This written offer must permit verbatim
00040  *       duplication by anyone, or
00041  *    C. it is distributed by someone who received only the
00042  *       executable form, and is accompanied by a copy of the
00043  *       written offer of source code that they received concurrently.
00044  *
00045  * In other words, you are welcome to use, share and improve this
00046  * source file.  You are forbidden to forbid anyone else to use, share
00047  * and improve what you give them.
00048  *
00049  * INTERNET: dburger@cs.wisc.edu
00050  * US Mail:  1210 W. Dayton Street, Madison, WI 53706
00051  *
00052  * $Id: resource.h,v 1.1.1.1 2003/09/18 00:57:54 panalyzer Exp $
00053  *
00054  * $Log: resource.h,v $
00055  * Revision 1.1.1.1  2003/09/18 00:57:54  panalyzer
00056  *
00057  *
00058  * Revision 1.1.1.1  2003/09/18 00:18:44  panalyzer
00059  *
00060  *
00061  * Revision 1.1.1.1  2003/09/16 18:48:14  gdm
00062  *
00063  *
00064  * Revision 1.1.1.1  2000/11/29 14:53:54  cu-cs
00065  * Grand unification of arm sources.
00066  *
00067  *
00068  * Revision 1.1.1.1.2.1  2000/11/06 13:18:22  taustin
00069  * Fixed a commit bug.
00070  *
00071  * Added perfect disambiguation support.
00072  *
00073  * Revision 1.1.1.1  2000/05/26 15:18:58  taustin
00074  * SimpleScalar Tool Set
00075  *
00076  *
00077  * Revision 1.4  1998/08/27 15:54:19  taustin
00078  * implemented host interface description in host.h
00079  * added target interface support
00080  *
00081  * Revision 1.3  1997/03/11  01:26:49  taustin
00082  * updated copyright
00083  *
00084  * Revision 1.1  1996/12/05  18:50:23  taustin
00085  * Initial revision
00086  *
00087  *
00088  */
00089 
00090 #ifndef RESOURCE_H
00091 #define RESOURCE_H
00092 
00093 #include <stdio.h>
00094 
00095 /* maximum number of resource classes supported */
00096 #define MAX_RES_CLASSES         16
00097 
00098 /* maximum number of resource instances for a class supported */
00099 #define MAX_INSTS_PER_CLASS     16
00100 
00101 /* resource descriptor */
00102 struct res_desc {
00103   char *name;                           /* name of functional unit */
00104   int quantity;                         /* total instances of this unit */
00105   int busy;                             /* non-zero if this unit is busy */
00106   struct res_template {
00107     int class;                          /* matching resource class: insts
00108                                            with this resource class will be
00109                                            able to execute on this unit */
00110     int oplat;                          /* operation latency: cycles until
00111                                            result is ready for use */
00112     int issuelat;                       /* issue latency: number of cycles
00113                                            before another operation can be
00114                                            issued on this resource */
00115     struct res_desc *master;            /* master resource record */
00116   } x[MAX_RES_CLASSES];
00117 };
00118 
00119 /* resource pool: one entry per resource instance */
00120 struct res_pool {
00121   char *name;                           /* pool name */
00122   int num_resources;                    /* total number of res instances */
00123   struct res_desc *resources;           /* resource instances */
00124   /* res class -> res template mapping table, lists are NULL terminated */
00125   int nents[MAX_RES_CLASSES];
00126   struct res_template *table[MAX_RES_CLASSES][MAX_INSTS_PER_CLASS];
00127 };
00128 
00129 /* create a resource pool */
00130 struct res_pool *res_create_pool(char *name, struct res_desc *pool, int ndesc);
00131 
00132 /* get a free resource from resource pool POOL that can execute a
00133    operation of class CLASS, returns a pointer to the resource template,
00134    returns NULL, if there are currently no free resources available,
00135    follow the MASTER link to the master resource descriptor;
00136    NOTE: caller is responsible for reseting the busy flag in the beginning
00137    of the cycle when the resource can once again accept a new operation */
00138 struct res_template *res_get(struct res_pool *pool, int class);
00139 
00140 /* dump the resource pool POOL to stream STREAM */
00141 void res_dump(struct res_pool *pool, FILE *stream);
00142 
00143 #endif /* RESOURCE_H */

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