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
14
15#include <linux/types.h>
16
17
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
33struct bi_record {
34	__be16 tag;			/* tag ID */
35	__be16 size;			/* size of record (in bytes) */
36	__be32 data[0];			/* data */
37};
38
39
40struct mem_info {
41	__be32 addr;			/* physical address of memory chunk */
42	__be32 size;			/* length of memory chunk (in bytes) */
43};
44
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) */
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) */
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
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
84
85
86    /*
87     *  CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE)
88     *
89     *  Note: we may rely on the following equalities:
90     *
91     *      CPU_68020 == MMU_68851
92     *      CPU_68030 == MMU_68030
93     *      CPU_68040 == FPU_68040 == MMU_68040
94     *      CPU_68060 == FPU_68060 == MMU_68060
95     */
96
97#define CPUB_68020		0
98#define CPUB_68030		1
99#define CPUB_68040		2
100#define CPUB_68060		3
101#define CPUB_COLDFIRE		4
102
103#define CPU_68020		(1 << CPUB_68020)
104#define CPU_68030		(1 << CPUB_68030)
105#define CPU_68040		(1 << CPUB_68040)
106#define CPU_68060		(1 << CPUB_68060)
107#define CPU_COLDFIRE		(1 << CPUB_COLDFIRE)
108
109#define FPUB_68881		0
110#define FPUB_68882		1
111#define FPUB_68040		2	/* Internal FPU */
112#define FPUB_68060		3	/* Internal FPU */
113#define FPUB_SUNFPA		4	/* Sun-3 FPA */
114#define FPUB_COLDFIRE		5	/* ColdFire FPU */
115
116#define FPU_68881		(1 << FPUB_68881)
117#define FPU_68882		(1 << FPUB_68882)
118#define FPU_68040		(1 << FPUB_68040)
119#define FPU_68060		(1 << FPUB_68060)
120#define FPU_SUNFPA		(1 << FPUB_SUNFPA)
121#define FPU_COLDFIRE		(1 << FPUB_COLDFIRE)
122
123#define MMUB_68851		0
124#define MMUB_68030		1	/* Internal MMU */
125#define MMUB_68040		2	/* Internal MMU */
126#define MMUB_68060		3	/* Internal MMU */
127#define MMUB_APOLLO		4	/* Custom Apollo */
128#define MMUB_SUN3		5	/* Custom Sun-3 */
129#define MMUB_COLDFIRE		6	/* Internal MMU */
130
131#define MMU_68851		(1 << MMUB_68851)
132#define MMU_68030		(1 << MMUB_68030)
133#define MMU_68040		(1 << MMUB_68040)
134#define MMU_68060		(1 << MMUB_68060)
135#define MMU_SUN3		(1 << MMUB_SUN3)
136#define MMU_APOLLO		(1 << MMUB_APOLLO)
137#define MMU_COLDFIRE		(1 << MMUB_COLDFIRE)
138
139
140    /*
141     * Stuff for bootinfo interface versioning
142     *
143     * At the start of kernel code, a 'struct bootversion' is located.
144     * bootstrap checks for a matching version of the interface before booting
145     * a kernel, to avoid user confusion if kernel and bootstrap don't work
146     * together :-)
147     *
148     * If incompatible changes are made to the bootinfo interface, the major
149     * number below should be stepped (and the minor reset to 0) for the
150     * appropriate machine. If a change is backward-compatible, the minor
151     * should be stepped. "Backwards-compatible" means that booting will work,
152     * but certain features may not.
153     */
154
155#define BOOTINFOV_MAGIC			0x4249561A	/* 'BIV^Z' */
156#define MK_BI_VERSION(major, minor)	(((major) << 16) + (minor))
157#define BI_VERSION_MAJOR(v)		(((v) >> 16) & 0xffff)
158#define BI_VERSION_MINOR(v)		((v) & 0xffff)
159
160#ifndef __ASSEMBLY__
161
162struct bootversion {
163	__be16 branch;
164	__be32 magic;
165	struct {
166		__be32 machtype;
167		__be32 version;
168	} machversions[0];
169} __packed;
170
171#endif /* __ASSEMBLY__ */
172
173
174#endif /* _UAPI_ASM_M68K_BOOTINFO_H */
175