1 /* $NetBSD: findcpu.c,v 1.20 2017/05/22 16:39:41 ragge Exp $ */
2 /*
3 * Copyright (c) 1994, 1998 Ludd, University of Lule}, Sweden.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include <sys/cdefs.h>
28 __KERNEL_RCSID(0, "$NetBSD: findcpu.c,v 1.20 2017/05/22 16:39:41 ragge Exp $");
29
30 #include <sys/param.h>
31 #ifdef _KERNEL
32 #include <sys/device.h>
33 #endif
34
35 #include <machine/sid.h>
36 #include <machine/nexus.h>
37 #include <machine/mtpr.h>
38 #include <machine/cpu.h>
39
40 /*
41 * We set up some information about the machine we're
42 * running on and thus initializes/uses vax_cputype and vax_boardtype.
43 * There should be no need to change/reinitialize these variables
44 * outside of this routine, they should be read only!
45 */
46 int vax_cputype; /* highest byte of SID register */
47 int vax_bustype; /* holds/defines all busses on this machine */
48 int vax_boardtype; /* machine dependent, combination of SID and SIE */
49
50 int vax_cpudata; /* contents of the SID register */
51 int vax_siedata; /* contents of the SIE register */
52 int vax_confdata; /* machine dependent, configuration/setup data */
53
54 /*
55 * Try to figure out which type of system this is.
56 */
57 void
findcpu(void)58 findcpu(void)
59 {
60 vax_cpudata = mfpr(PR_SID);
61 vax_cputype = vax_cpudata >> 24;
62 vax_boardtype = vax_cputype << 24;
63
64 switch (vax_cputype) {
65 case VAX_TYP_730:
66 vax_bustype = VAX_UNIBUS;
67 break;
68 case VAX_TYP_780:
69 vax_bustype = VAX_SBIBUS;
70 break;
71 case VAX_TYP_750:
72 vax_bustype = VAX_CMIBUS;
73 break;
74 case VAX_TYP_790:
75 vax_bustype = VAX_ABUS;
76 break;
77
78 case VAX_TYP_UV1:
79 vax_bustype = VAX_IBUS;
80 break;
81
82 case VAX_TYP_UV2:
83 case VAX_TYP_CVAX:
84 case VAX_TYP_RIGEL:
85 case VAX_TYP_MARIAH:
86 case VAX_TYP_NVAX:
87 case VAX_TYP_SOC:
88 vax_siedata = *(int *)(0x20040004); /* SIE address */
89 vax_boardtype |= vax_siedata >> 24;
90
91 switch (vax_boardtype) {
92 case VAX_BTYP_420: /* They are very similar */
93 case VAX_BTYP_410:
94 case VAX_BTYP_43:
95 case VAX_BTYP_46:
96 case VAX_BTYP_48:
97 case VAX_BTYP_IS1:
98 vax_confdata = *(int *)(0x20020000);
99 vax_bustype = VAX_VSBUS;
100 break;
101 case VAX_BTYP_49:
102 vax_confdata = *(int *)(0x25800000);
103 vax_bustype = VAX_VSBUS;
104 break;
105
106 case VAX_BTYP_9CC:
107 case VAX_BTYP_9RR:
108 case VAX_BTYP_1202:
109 case VAX_BTYP_1302:
110 vax_bustype = VAX_XMIBUS;
111 break;
112
113 case VAX_BTYP_670:
114 case VAX_BTYP_660:
115 case VAX_BTYP_60:
116 case VAX_BTYP_680:
117 case VAX_BTYP_681:
118 case VAX_BTYP_630:
119 case VAX_BTYP_650:
120 case VAX_BTYP_53:
121 vax_bustype = VAX_IBUS;
122 break;
123
124 }
125 break;
126
127 case VAX_TYP_8SS:
128 vax_boardtype = VAX_BTYP_8000;
129 vax_bustype = VAX_BIBUS;
130 break;
131
132 case VAX_TYP_8NN:
133 vax_boardtype = VAX_BTYP_8800; /* subversion later */
134 vax_bustype = VAX_NMIBUS;
135 break;
136
137 case VAX_TYP_8PS:
138 vax_boardtype = VAX_BTYP_8PS;
139 vax_bustype = VAX_NMIBUS;
140 break;
141
142 default:
143 /* CPU not supported, just give up */
144 __asm("halt");
145 }
146 }
147