c84f4e94d9
into sys/dev/dec and split into a clockfns layer and a "middle" layer for other DEC systems which use mcclocks with each onchip byte register padded out to a 32-bit word. Clone alpha/alpha/mcclock (also duplicated in pmax port) into sys/dev/dec, and ifdef for default clockrates on pmax and alpha. Use new machinery on pmax for ibus,ioasic attached mcclocks.
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* $NetBSD: mcclock_pad32.h,v 1.9 1998/04/19 07:50:26 jonathan Exp $ */
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/*
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* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* mc1461818 (or compatible) clock driver, for machines where
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* each byte-wide mcclock chip register is mapped into the low-order
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* byte of a little-endian 32-bit word,
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* DECstation 2100/3100
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* DECstation 5100
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* DECstation 5000/200 baseboard
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* IOCTL asic machines (Alpha 3000 series, Decstation 5000 series)
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*/
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struct mcclock_pad32_clockdatum {
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u_char datum;
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char pad[3];
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};
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/*
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* Device softc used by bus-specific front-end.
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*/
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struct mcclock_pad32_softc {
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struct mcclock_softc sc_mcclock;
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struct mcclock_pad32_clockdatum *sc_dp;
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};
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/* register read/write functions */
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const struct mcclock_busfns mcclock_pad32_busfns;
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