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
34struct bi_record {
35	__be16 tag;			/* tag ID */
36	__be16 size;			/* size of record (in bytes) */
37	__be32 data[];			/* data */
38};
39
40
41struct 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 * A random seed used to initialize the RNG. Record format:
69 *
70 *   - length       [ 2 bytes, 16-bit big endian ]
71 *   - seed data    [ `length` bytes, padded to preserve 4-byte struct alignment ]
72 */
73#define BI_RNG_SEED		0x0008
74
75
76    /*
77     *  Linux/m68k Architectures (BI_MACHTYPE)
78     */
79
80#define MACH_AMIGA		1
81#define MACH_ATARI		2
82#define MACH_MAC		3
83#define MACH_APOLLO		4
84#define MACH_SUN3		5
85#define MACH_MVME147		6
86#define MACH_MVME16x		7
87#define MACH_BVME6000		8
88#define MACH_HP300		9
89#define MACH_Q40		10
90#define MACH_SUN3X		11
91#define MACH_M54XX		12
92#define MACH_M5441X		13
93#define MACH_VIRT		14
94
95
96    /*
97     *  CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE)
98     *
99     *  Note: we may rely on the following equalities:
100     *
101     *      CPU_68020 == MMU_68851
102     *      CPU_68030 == MMU_68030
103     *      CPU_68040 == FPU_68040 == MMU_68040
104     *      CPU_68060 == FPU_68060 == MMU_68060
105     */
106
107#define CPUB_68020		0
108#define CPUB_68030		1
109#define CPUB_68040		2
110#define CPUB_68060		3
111#define CPUB_COLDFIRE		4
112
113#define CPU_68020		(1 << CPUB_68020)
114#define CPU_68030		(1 << CPUB_68030)
115#define CPU_68040		(1 << CPUB_68040)
116#define CPU_68060		(1 << CPUB_68060)
117#define CPU_COLDFIRE		(1 << CPUB_COLDFIRE)
118
119#define FPUB_68881		0
120#define FPUB_68882		1
121#define FPUB_68040		2	/* Internal FPU */
122#define FPUB_68060		3	/* Internal FPU */
123#define FPUB_SUNFPA		4	/* Sun-3 FPA */
124#define FPUB_COLDFIRE		5	/* ColdFire FPU */
125
126#define FPU_68881		(1 << FPUB_68881)
127#define FPU_68882		(1 << FPUB_68882)
128#define FPU_68040		(1 << FPUB_68040)
129#define FPU_68060		(1 << FPUB_68060)
130#define FPU_SUNFPA		(1 << FPUB_SUNFPA)
131#define FPU_COLDFIRE		(1 << FPUB_COLDFIRE)
132
133#define MMUB_68851		0
134#define MMUB_68030		1	/* Internal MMU */
135#define MMUB_68040		2	/* Internal MMU */
136#define MMUB_68060		3	/* Internal MMU */
137#define MMUB_APOLLO		4	/* Custom Apollo */
138#define MMUB_SUN3		5	/* Custom Sun-3 */
139#define MMUB_COLDFIRE		6	/* Internal MMU */
140
141#define MMU_68851		(1 << MMUB_68851)
142#define MMU_68030		(1 << MMUB_68030)
143#define MMU_68040		(1 << MMUB_68040)
144#define MMU_68060		(1 << MMUB_68060)
145#define MMU_SUN3		(1 << MMUB_SUN3)
146#define MMU_APOLLO		(1 << MMUB_APOLLO)
147#define MMU_COLDFIRE		(1 << MMUB_COLDFIRE)
148
149
150    /*
151     * Stuff for bootinfo interface versioning
152     *
153     * At the start of kernel code, a 'struct bootversion' is located.
154     * bootstrap checks for a matching version of the interface before booting
155     * a kernel, to avoid user confusion if kernel and bootstrap don't work
156     * together :-)
157     *
158     * If incompatible changes are made to the bootinfo interface, the major
159     * number below should be stepped (and the minor reset to 0) for the
160     * appropriate machine. If a change is backward-compatible, the minor
161     * should be stepped. "Backwards-compatible" means that booting will work,
162     * but certain features may not.
163     */
164
165#define BOOTINFOV_MAGIC			0x4249561A	/* 'BIV^Z' */
166#define MK_BI_VERSION(major, minor)	(((major) << 16) + (minor))
167#define BI_VERSION_MAJOR(v)		(((v) >> 16) & 0xffff)
168#define BI_VERSION_MINOR(v)		((v) & 0xffff)
169
170#ifndef __ASSEMBLY__
171
172struct bootversion {
173	__be16 branch;
174	__be32 magic;
175	struct {
176		__be32 machtype;
177		__be32 version;
178	} machversions[];
179} __packed;
180
181#endif /* __ASSEMBLY__ */
182
183
184#endif /* _UAPI_ASM_M68K_BOOTINFO_H */
185