ipc_node.h

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    1 /* 
    2  * Mach Operating System
    3  * Copyright (c) 1991 Carnegie Mellon University
    4  * All Rights Reserved.
    5  * 
    6  * Permission to use, copy, modify and distribute this software and its
    7  * documentation is hereby granted, provided that both the copyright
    8  * notice and this permission notice appear in all copies of the
    9  * software, derivative works or modified versions, and any portions
   10  * thereof, and that both notices appear in supporting documentation.
   11  * 
   12  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   13  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   14  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   15  * 
   16  * Carnegie Mellon requests users of this software to return to
   17  * 
   18  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   19  *  School of Computer Science
   20  *  Carnegie Mellon University
   21  *  Pittsburgh PA 15213-3890
   22  * 
   23  * any improvements or extensions that they make and grant Carnegie Mellon
   24  * the rights to redistribute these changes.
   25  */
   26 /*
   27  * HISTORY
   28  * $Log:        ipc_node.h,v $
   29  * Revision 2.4  92/03/10  16:28:03  jsb
   30  *      Merged in norma branch changes as of NORMA_MK7.
   31  *      [92/03/09  12:50:06  jsb]
   32  * 
   33  * Revision 2.3.2.2  92/01/09  18:45:45  jsb
   34  *      Use MAX_SPECIAL_KERNEL_ID, not MAX_SPECIAL_ID, in IP_NORMA_SPECIAL.
   35  *      [92/01/04  18:26:48  jsb]
   36  * 
   37  * Revision 2.3.2.1  92/01/03  16:37:54  jsb
   38  *      Added IP_NORMA_{MAX_LID,SPECIAL} macros, and declaration
   39  *      of host_special_port array.
   40  *      [91/12/24  14:25:35  jsb]
   41  * 
   42  * Revision 2.3  91/12/13  14:00:49  jsb
   43  *      Moved MAX_SPECIAL_ID to mach/norma_special_ports.h.
   44  * 
   45  * Revision 2.2  91/11/14  16:46:02  rpd
   46  *      Created.
   47  * 
   48  */
   49 /*
   50  *      File:   norma/ipc_node.h
   51  *      Author: Joseph S. Barrera III
   52  *      Date:   1991
   53  *
   54  *      Definitions for norma nodes.
   55  */
   56 
   57 #ifndef _NORMA_IPC_NODE_H_
   58 #define _NORMA_IPC_NODE_H_
   59 
   60 #include <mach/norma_special_ports.h>
   61 
   62 /*
   63  * A uid (unique id) = node + lid (local id)
   64  * We embed the node id in the uid because receive rights rarely move.
   65  */
   66 
   67 /*
   68  * 12 bits for node             -> max 4096 nodes
   69  * 20 bits for local id         -> max 1,048,575 exported ports per node
   70  *
   71  * (Byte allignment and intuitive node:lid placement aids debugging)
   72  */
   73 #define IP_NORMA_NODE(uid)      (((unsigned long)(uid) >> 20) & 0x00000fff)
   74 #define IP_NORMA_LID(uid)       ((unsigned long)(uid) & 0x000fffff)
   75 #define IP_NORMA_UID(node, lid) (((node) << 20) | (lid))
   76 
   77 #define IP_NORMA_MAX_LID        IP_NORMA_LID(0xffffffff)
   78 #define IP_NORMA_SPECIAL(uid)   (IP_NORMA_LID(uid) > 0 && \
   79                                  IP_NORMA_LID(uid) <= MAX_SPECIAL_KERNEL_ID)
   80 
   81 extern ipc_port_t               host_special_port[MAX_SPECIAL_ID];
   82 
   83 #endif  _NORMA_IPC_NODE_H_

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FreeBSD/Linux Kernel Cross Reference sys/norma/ipc_node.h

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sys/norma/ipc_node.h