1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3 * asm/bootinfo.h -- Definition of the Linux/m68k boot information structure
4 *
5 * Copyright 1992 by Greg Harp
6 *
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive
9 * for more details.
10 */
11
12 #ifndef _UAPI_ASM_M68K_BOOTINFO_H
13 #define _UAPI_ASM_M68K_BOOTINFO_H
14
15
16 #include <linux/types.h>
17
18
19 #ifndef __ASSEMBLY__
20
21 /*
22 * Bootinfo definitions
23 *
24 * This is an easily parsable and extendable structure containing all
25 * information to be passed from the bootstrap to the kernel.
26 *
27 * This way I hope to keep all future changes back/forewards compatible.
28 * Thus, keep your fingers crossed...
29 *
30 * This structure is copied right after the kernel by the bootstrap
31 * routine.
32 */
33
34 struct bi_record {
35 __be16 tag; /* tag ID */
36 __be16 size; /* size of record (in bytes) */
37 __be32 data[0]; /* data */
38 };
39
40
41 struct mem_info {
42 __be32 addr; /* physical address of memory chunk */
43 __be32 size; /* length of memory chunk (in bytes) */
44 };
45
46 #endif /* __ASSEMBLY__ */
47
48
49 /*
50 * Tag Definitions
51 *
52 * Machine independent tags start counting from 0x0000
53 * Machine dependent tags start counting from 0x8000
54 */
55
56 #define BI_LAST 0x0000 /* last record (sentinel) */
57 #define BI_MACHTYPE 0x0001 /* machine type (__be32) */
58 #define BI_CPUTYPE 0x0002 /* cpu type (__be32) */
59 #define BI_FPUTYPE 0x0003 /* fpu type (__be32) */
60 #define BI_MMUTYPE 0x0004 /* mmu type (__be32) */
61 #define BI_MEMCHUNK 0x0005 /* memory chunk address and size */
62 /* (struct mem_info) */
63 #define BI_RAMDISK 0x0006 /* ramdisk address and size */
64 /* (struct mem_info) */
65 #define BI_COMMAND_LINE 0x0007 /* kernel command line parameters */
66 /* (string) */
67
68
69 /*
70 * Linux/m68k Architectures (BI_MACHTYPE)
71 */
72
73 #define MACH_AMIGA 1
74 #define MACH_ATARI 2
75 #define MACH_MAC 3
76 #define MACH_APOLLO 4
77 #define MACH_SUN3 5
78 #define MACH_MVME147 6
79 #define MACH_MVME16x 7
80 #define MACH_BVME6000 8
81 #define MACH_HP300 9
82 #define MACH_Q40 10
83 #define MACH_SUN3X 11
84 #define MACH_M54XX 12
85 #define MACH_M5441X 13
86
87
88 /*
89 * CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE)
90 *
91 * Note: we may rely on the following equalities:
92 *
93 * CPU_68020 == MMU_68851
94 * CPU_68030 == MMU_68030
95 * CPU_68040 == FPU_68040 == MMU_68040
96 * CPU_68060 == FPU_68060 == MMU_68060
97 */
98
99 #define CPUB_68020 0
100 #define CPUB_68030 1
101 #define CPUB_68040 2
102 #define CPUB_68060 3
103 #define CPUB_COLDFIRE 4
104
105 #define CPU_68020 (1 << CPUB_68020)
106 #define CPU_68030 (1 << CPUB_68030)
107 #define CPU_68040 (1 << CPUB_68040)
108 #define CPU_68060 (1 << CPUB_68060)
109 #define CPU_COLDFIRE (1 << CPUB_COLDFIRE)
110
111 #define FPUB_68881 0
112 #define FPUB_68882 1
113 #define FPUB_68040 2 /* Internal FPU */
114 #define FPUB_68060 3 /* Internal FPU */
115 #define FPUB_SUNFPA 4 /* Sun-3 FPA */
116 #define FPUB_COLDFIRE 5 /* ColdFire FPU */
117
118 #define FPU_68881 (1 << FPUB_68881)
119 #define FPU_68882 (1 << FPUB_68882)
120 #define FPU_68040 (1 << FPUB_68040)
121 #define FPU_68060 (1 << FPUB_68060)
122 #define FPU_SUNFPA (1 << FPUB_SUNFPA)
123 #define FPU_COLDFIRE (1 << FPUB_COLDFIRE)
124
125 #define MMUB_68851 0
126 #define MMUB_68030 1 /* Internal MMU */
127 #define MMUB_68040 2 /* Internal MMU */
128 #define MMUB_68060 3 /* Internal MMU */
129 #define MMUB_APOLLO 4 /* Custom Apollo */
130 #define MMUB_SUN3 5 /* Custom Sun-3 */
131 #define MMUB_COLDFIRE 6 /* Internal MMU */
132
133 #define MMU_68851 (1 << MMUB_68851)
134 #define MMU_68030 (1 << MMUB_68030)
135 #define MMU_68040 (1 << MMUB_68040)
136 #define MMU_68060 (1 << MMUB_68060)
137 #define MMU_SUN3 (1 << MMUB_SUN3)
138 #define MMU_APOLLO (1 << MMUB_APOLLO)
139 #define MMU_COLDFIRE (1 << MMUB_COLDFIRE)
140
141
142 /*
143 * Stuff for bootinfo interface versioning
144 *
145 * At the start of kernel code, a 'struct bootversion' is located.
146 * bootstrap checks for a matching version of the interface before booting
147 * a kernel, to avoid user confusion if kernel and bootstrap don't work
148 * together :-)
149 *
150 * If incompatible changes are made to the bootinfo interface, the major
151 * number below should be stepped (and the minor reset to 0) for the
152 * appropriate machine. If a change is backward-compatible, the minor
153 * should be stepped. "Backwards-compatible" means that booting will work,
154 * but certain features may not.
155 */
156
157 #define BOOTINFOV_MAGIC 0x4249561A /* 'BIV^Z' */
158 #define MK_BI_VERSION(major, minor) (((major) << 16) + (minor))
159 #define BI_VERSION_MAJOR(v) (((v) >> 16) & 0xffff)
160 #define BI_VERSION_MINOR(v) ((v) & 0xffff)
161
162 #ifndef __ASSEMBLY__
163
164 struct bootversion {
165 __be16 branch;
166 __be32 magic;
167 struct {
168 __be32 machtype;
169 __be32 version;
170 } machversions[0];
171 } __packed;
172
173 #endif /* __ASSEMBLY__ */
174
175
176 #endif /* _UAPI_ASM_M68K_BOOTINFO_H */