1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * identify.c: identify machine by looking up system identifier
7 *
8 * Copyright (C) 1998 Thomas Bogendoerfer
9 *
10 * This code is based on arch/mips/sgi/kernel/system.c, which is
11 *
12 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
13 */
14 #include <linux/config.h>
15 #include <linux/init.h>
16 #include <linux/kernel.h>
17 #include <linux/types.h>
18 #include <linux/string.h>
19
20 #include <asm/sgialib.h>
21 #include <asm/bootinfo.h>
22
23 struct smatch {
24 char *arcname;
25 char *liname;
26 int group;
27 int type;
28 int flags;
29 };
30
31 static struct smatch mach_table[] = {
32 { "SGI-IP22",
33 "SGI Indy",
34 MACH_GROUP_SGI,
35 MACH_SGI_IP22,
36 PROM_FLAG_ARCS
37 }, { "SGI-IP27",
38 "SGI Origin",
39 MACH_GROUP_SGI,
40 MACH_SGI_IP27,
41 PROM_FLAG_ARCS
42 }, { "SGI-IP28",
43 "SGI IP28",
44 MACH_GROUP_SGI,
45 MACH_SGI_IP28,
46 PROM_FLAG_ARCS
47 }, { "Microsoft-Jazz",
48 "Jazz MIPS_Magnum_4000",
49 MACH_GROUP_JAZZ,
50 MACH_MIPS_MAGNUM_4000,
51 0
52 }, { "PICA-61",
53 "Jazz Acer_PICA_61",
54 MACH_GROUP_JAZZ,
55 MACH_ACER_PICA_61,
56 0
57 }, { "RM200PCI",
58 "SNI RM200_PCI",
59 MACH_GROUP_SNI_RM,
60 MACH_SNI_RM200_PCI,
61 PROM_FLAG_DONT_FREE_TEMP
62 }
63 };
64
65 int prom_flags;
66
string_to_mach(const char * s)67 static struct smatch * __init string_to_mach(const char *s)
68 {
69 int i;
70
71 for (i = 0; i < (sizeof(mach_table) / sizeof (mach_table[0])); i++) {
72 if (!strcmp(s, mach_table[i].arcname))
73 return &mach_table[i];
74 }
75
76 panic("Yeee, could not determine architecture type <%s>", s);
77 }
78
79 char *system_type;
80
get_system_type(void)81 const char *get_system_type(void)
82 {
83 return system_type;
84 }
85
prom_identify_arch(void)86 void __init prom_identify_arch(void)
87 {
88 pcomponent *p;
89 struct smatch *mach;
90 const char *iname;
91
92 /*
93 * The root component tells us what machine architecture we have here.
94 */
95 p = ArcGetChild(PROM_NULL_COMPONENT);
96 if (p == NULL) {
97 #ifdef CONFIG_SGI_IP27
98 /* IP27 PROM misbehaves, seems to not implement ARC
99 GetChild(). So we just assume it's an IP27. */
100 iname = "SGI-IP27";
101 #else
102 iname = "Unknown";
103 #endif
104 } else
105 iname = (char *) (long) p->iname;
106
107 printk(KERN_INFO "ARCH: %s\n", iname);
108 mach = string_to_mach(iname);
109 system_type = mach->liname;
110
111 mips_machgroup = mach->group;
112 mips_machtype = mach->type;
113 prom_flags = mach->flags;
114 }
115