1 /*        $NetBSD: tc_machdep.h,v 1.18 2009/12/14 00:46:10 matt 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 
65 typedef paddr_t               tc_addr_t;
66 typedef 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