106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* $Id: md.c,v 1.1 1993/11/14 21:20:18 deraadt Exp $
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*/
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#ifndef lint
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static char rcsid[] =
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"@(#) Header: md-hp300.c,v 1.4 90/10/25 15:24:19 mccanne Exp (LBL)";
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#endif
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int
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clock_sigfigs()
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{
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#ifdef hp300
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/*
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* The hp's apparently have a microsecond clock.
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*/
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return 6;
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#endif
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#ifdef pmax
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/*
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* On DEC RISC machines, timestamps to about 4 msec so we pretend
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* it is 1 msec. Future kernel hacking could improve it.
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*/
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return 3;
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#endif
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#ifdef ibmrt
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return 3;
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#endif
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#ifdef sun3
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/* Stock Sun 3's have clocks accurate to 20 ms. */
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return 2;
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#endif
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#ifdef sparc
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/* The sun includes are arranged too stupidly to help us */
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#define ARCH_MASK 0xf0000000
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#define MACH_MASK 0x0f000000
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#define ARCH_MACH_MASK (ARCH_MASK + MACH_MASK)
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#define ARCH_SUN4 0x20000000
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#define ARCH_SUN4C 0x50000000
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#define MACH_60 0x01000000 /* Sparcstation 1 */
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#define MACH_4_330 (ARCH_SUN4 + 0x03000000)
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#define MACH_4_460 (ARCH_SUN4 + 0x04000000)
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#define MACH_260 0x01000000
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#define MACH_110 0x02000000
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#define MACH_330 0x03000000
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#define MACH_460 0x04000000
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int good = 0;
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long id = gethostid();
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/*
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* Apparently, all sun4c's, 4/300's, and 4/400's have the
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* Mostek 48T02 clock chip.
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*/
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if ((id & ARCH_MASK) == ARCH_SUN4C)
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++good;
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else
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switch (id & ARCH_MACH_MASK) {
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case MACH_4_330:
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case MACH_4_460:
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++good;
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break;
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}
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/* On machines with "good" clocks, timestamps to microseconds.
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Default is hundreths of a second. */
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if (good)
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return 6;
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else
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return 2;
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#endif
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#ifdef vax
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/*
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* Vaxen appear to have clocks accurate to 1 us,
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* but packetfilter is timestamping to 10 ms.
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*/
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return 2;
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#endif
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}
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