1/*	$NetBSD: tc_machdep.h,v 1.17 2000/02/29 04:41:59 nisimura Exp $	*/
2
3/*
4 * Copyright (c) 1994, 1995 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Jonathan Stone, Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30/*
31 * Machine-specific definitions for TURBOchannel support.
32 *
33 * This file must typedef the following types:
34 *
35 *	tc_addr_t	TURBOchannel bus address
36 *	tc_offset_t	TURBOchannel bus address difference (offset)
37 *
38 * This file must prototype or define the following functions
39 * or macros (one or more of which may be no-ops):
40 *
41 *	tc_mb()		read/write memory barrier (any CPU<->memory
42 *			reads/writes before must complete before any
43 *			CPU<->memory reads/writes after).
44 *	tc_wmb()	write memory barrier (any CPU<->memory writes
45 *			before must complete before any CPU<->memory
46 *			writes after).
47 *	tc_syncbus()	sync TC bus; make sure CPU writes are
48 *			propagated across the TURBOchannel bus.
49 *	tc_badaddr()	return non-zero if the given address is invalid.
50 *	TC_DENSE_TO_SPARSE()
51 *			convert the given physical address in
52 *			TURBOchannel dense space to the corresponding
53 *			address in TURBOchannel sparse space.
54 *	TC_PHYS_TO_UNCACHED()
55 *			convert the given system memory physical address
56 *			to the physical address of the corresponding
57 *			region that is not cached.
58 */
59
60#ifndef _PMAX_TC_MACHDEP_H_
61#define _PMAX_TC_MACHDEP_H_
62
63#include <mips/cpuregs.h>		/* defines MIPS_PHYS_TO_KSEG1 */
64
65typedef paddr_t		tc_addr_t;
66typedef int32_t		tc_offset_t;
67
68#define	tc_mb()		wbflush()
69#define	tc_wmb()	wbflush()
70#define	tc_syncbus()	wbflush() /* XXX how to do this on a DECstation ? */
71
72#define	tc_badaddr(tcaddr) badaddr((void *)(tcaddr), sizeof (uint32_t))
73
74#define	TC_DENSE_TO_SPARSE(addr)  (addr)
75
76#define	TC_PHYS_TO_UNCACHED(addr) MIPS_PHYS_TO_KSEG1(addr)
77
78/*
79 * Use the following macros to compare device names on a pmax, as
80 * the autoconfig structs are in a state of flux.
81 */
82#define TC_BUS_MATCHNAME(ta, name) \
83		(strncmp( (ta)->ta_modname, (name), TC_ROM_LLEN+1) == 0)
84
85#define KV(x)	((tc_addr_t)MIPS_PHYS_TO_KSEG1(x))
86#define C(x)	((void *)(u_long)(x))
87
88#endif	/* !_PMAX_TC_MACHDEP_H_ */
89