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4c3c522b GU |
1 | /* |
2 | * asm/bootinfo.h -- Definition of the Linux/m68k boot information structure | |
3 | * | |
4 | * Copyright 1992 by Greg Harp | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file COPYING in the main directory of this archive | |
8 | * for more details. | |
9 | */ | |
10 | ||
11 | #ifndef _UAPI_ASM_M68K_BOOTINFO_H | |
12 | #define _UAPI_ASM_M68K_BOOTINFO_H | |
13 | ||
4c3c522b | 14 | |
abe48101 GU |
15 | #include <linux/types.h> |
16 | ||
17 | ||
4c3c522b GU |
18 | #ifndef __ASSEMBLY__ |
19 | ||
20 | /* | |
21 | * Bootinfo definitions | |
22 | * | |
23 | * This is an easily parsable and extendable structure containing all | |
24 | * information to be passed from the bootstrap to the kernel. | |
25 | * | |
26 | * This way I hope to keep all future changes back/forewards compatible. | |
27 | * Thus, keep your fingers crossed... | |
28 | * | |
29 | * This structure is copied right after the kernel by the bootstrap | |
30 | * routine. | |
31 | */ | |
32 | ||
33 | struct bi_record { | |
abe48101 GU |
34 | __be16 tag; /* tag ID */ |
35 | __be16 size; /* size of record (in bytes) */ | |
36 | __be32 data[0]; /* data */ | |
4c3c522b GU |
37 | }; |
38 | ||
79930084 GU |
39 | |
40 | struct mem_info { | |
abe48101 GU |
41 | __be32 addr; /* physical address of memory chunk */ |
42 | __be32 size; /* length of memory chunk (in bytes) */ | |
79930084 GU |
43 | }; |
44 | ||
4c3c522b GU |
45 | #endif /* __ASSEMBLY__ */ |
46 | ||
47 | ||
48 | /* | |
49 | * Tag Definitions | |
50 | * | |
51 | * Machine independent tags start counting from 0x0000 | |
52 | * Machine dependent tags start counting from 0x8000 | |
53 | */ | |
54 | ||
55 | #define BI_LAST 0x0000 /* last record (sentinel) */ | |
abe48101 GU |
56 | #define BI_MACHTYPE 0x0001 /* machine type (__be32) */ |
57 | #define BI_CPUTYPE 0x0002 /* cpu type (__be32) */ | |
58 | #define BI_FPUTYPE 0x0003 /* fpu type (__be32) */ | |
59 | #define BI_MMUTYPE 0x0004 /* mmu type (__be32) */ | |
4c3c522b GU |
60 | #define BI_MEMCHUNK 0x0005 /* memory chunk address and size */ |
61 | /* (struct mem_info) */ | |
62 | #define BI_RAMDISK 0x0006 /* ramdisk address and size */ | |
63 | /* (struct mem_info) */ | |
64 | #define BI_COMMAND_LINE 0x0007 /* kernel command line parameters */ | |
65 | /* (string) */ | |
66 | ||
67 | ||
79930084 GU |
68 | /* |
69 | * Linux/m68k Architectures (BI_MACHTYPE) | |
70 | */ | |
71 | ||
72 | #define MACH_AMIGA 1 | |
73 | #define MACH_ATARI 2 | |
74 | #define MACH_MAC 3 | |
75 | #define MACH_APOLLO 4 | |
76 | #define MACH_SUN3 5 | |
77 | #define MACH_MVME147 6 | |
78 | #define MACH_MVME16x 7 | |
79 | #define MACH_BVME6000 8 | |
80 | #define MACH_HP300 9 | |
81 | #define MACH_Q40 10 | |
82 | #define MACH_SUN3X 11 | |
83 | #define MACH_M54XX 12 | |
657ae75f | 84 | #define MACH_M5441X 13 |
79930084 GU |
85 | |
86 | ||
87 | /* | |
88 | * CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE) | |
89 | * | |
90 | * Note: we may rely on the following equalities: | |
91 | * | |
92 | * CPU_68020 == MMU_68851 | |
93 | * CPU_68030 == MMU_68030 | |
94 | * CPU_68040 == FPU_68040 == MMU_68040 | |
95 | * CPU_68060 == FPU_68060 == MMU_68060 | |
96 | */ | |
97 | ||
98 | #define CPUB_68020 0 | |
99 | #define CPUB_68030 1 | |
100 | #define CPUB_68040 2 | |
101 | #define CPUB_68060 3 | |
102 | #define CPUB_COLDFIRE 4 | |
103 | ||
104 | #define CPU_68020 (1 << CPUB_68020) | |
105 | #define CPU_68030 (1 << CPUB_68030) | |
106 | #define CPU_68040 (1 << CPUB_68040) | |
107 | #define CPU_68060 (1 << CPUB_68060) | |
108 | #define CPU_COLDFIRE (1 << CPUB_COLDFIRE) | |
109 | ||
110 | #define FPUB_68881 0 | |
111 | #define FPUB_68882 1 | |
112 | #define FPUB_68040 2 /* Internal FPU */ | |
113 | #define FPUB_68060 3 /* Internal FPU */ | |
114 | #define FPUB_SUNFPA 4 /* Sun-3 FPA */ | |
115 | #define FPUB_COLDFIRE 5 /* ColdFire FPU */ | |
116 | ||
117 | #define FPU_68881 (1 << FPUB_68881) | |
118 | #define FPU_68882 (1 << FPUB_68882) | |
119 | #define FPU_68040 (1 << FPUB_68040) | |
120 | #define FPU_68060 (1 << FPUB_68060) | |
121 | #define FPU_SUNFPA (1 << FPUB_SUNFPA) | |
122 | #define FPU_COLDFIRE (1 << FPUB_COLDFIRE) | |
123 | ||
124 | #define MMUB_68851 0 | |
125 | #define MMUB_68030 1 /* Internal MMU */ | |
126 | #define MMUB_68040 2 /* Internal MMU */ | |
127 | #define MMUB_68060 3 /* Internal MMU */ | |
128 | #define MMUB_APOLLO 4 /* Custom Apollo */ | |
129 | #define MMUB_SUN3 5 /* Custom Sun-3 */ | |
130 | #define MMUB_COLDFIRE 6 /* Internal MMU */ | |
131 | ||
132 | #define MMU_68851 (1 << MMUB_68851) | |
133 | #define MMU_68030 (1 << MMUB_68030) | |
134 | #define MMU_68040 (1 << MMUB_68040) | |
135 | #define MMU_68060 (1 << MMUB_68060) | |
136 | #define MMU_SUN3 (1 << MMUB_SUN3) | |
137 | #define MMU_APOLLO (1 << MMUB_APOLLO) | |
138 | #define MMU_COLDFIRE (1 << MMUB_COLDFIRE) | |
139 | ||
140 | ||
4c3c522b GU |
141 | /* |
142 | * Stuff for bootinfo interface versioning | |
143 | * | |
144 | * At the start of kernel code, a 'struct bootversion' is located. | |
145 | * bootstrap checks for a matching version of the interface before booting | |
146 | * a kernel, to avoid user confusion if kernel and bootstrap don't work | |
147 | * together :-) | |
148 | * | |
149 | * If incompatible changes are made to the bootinfo interface, the major | |
150 | * number below should be stepped (and the minor reset to 0) for the | |
151 | * appropriate machine. If a change is backward-compatible, the minor | |
152 | * should be stepped. "Backwards-compatible" means that booting will work, | |
153 | * but certain features may not. | |
154 | */ | |
155 | ||
156 | #define BOOTINFOV_MAGIC 0x4249561A /* 'BIV^Z' */ | |
157 | #define MK_BI_VERSION(major, minor) (((major) << 16) + (minor)) | |
158 | #define BI_VERSION_MAJOR(v) (((v) >> 16) & 0xffff) | |
159 | #define BI_VERSION_MINOR(v) ((v) & 0xffff) | |
160 | ||
161 | #ifndef __ASSEMBLY__ | |
162 | ||
163 | struct bootversion { | |
abe48101 GU |
164 | __be16 branch; |
165 | __be32 magic; | |
4c3c522b | 166 | struct { |
abe48101 GU |
167 | __be32 machtype; |
168 | __be32 version; | |
4c3c522b GU |
169 | } machversions[0]; |
170 | } __packed; | |
171 | ||
172 | #endif /* __ASSEMBLY__ */ | |
173 | ||
174 | ||
175 | #endif /* _UAPI_ASM_M68K_BOOTINFO_H */ |