blob: 7b790e8ec8d64871721525870125ad165c8bd06a [file] [log] [blame]
Laurent Vivier382d71a2020-12-20 12:26:09 +01001/* 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 /*
17 * Bootinfo definitions
18 *
19 * This is an easily parsable and extendable structure containing all
20 * information to be passed from the bootstrap to the kernel.
21 *
22 * This way I hope to keep all future changes back/forewards compatible.
23 * Thus, keep your fingers crossed...
24 *
25 * This structure is copied right after the kernel by the bootstrap
26 * routine.
27 */
28
29struct bi_record {
30 uint16_t tag; /* tag ID */
31 uint16_t size; /* size of record (in bytes) */
32 uint32_t data[0]; /* data */
33};
34
35
36struct mem_info {
37 uint32_t addr; /* physical address of memory chunk */
38 uint32_t size; /* length of memory chunk (in bytes) */
39};
40
41
42 /*
43 * Tag Definitions
44 *
45 * Machine independent tags start counting from 0x0000
46 * Machine dependent tags start counting from 0x8000
47 */
48
49#define BI_LAST 0x0000 /* last record (sentinel) */
50#define BI_MACHTYPE 0x0001 /* machine type (uint32_t) */
51#define BI_CPUTYPE 0x0002 /* cpu type (uint32_t) */
52#define BI_FPUTYPE 0x0003 /* fpu type (uint32_t) */
53#define BI_MMUTYPE 0x0004 /* mmu type (uint32_t) */
54#define BI_MEMCHUNK 0x0005 /* memory chunk address and size */
55 /* (struct mem_info) */
56#define BI_RAMDISK 0x0006 /* ramdisk address and size */
57 /* (struct mem_info) */
58#define BI_COMMAND_LINE 0x0007 /* kernel command line parameters */
59 /* (string) */
60
61
62 /*
63 * Linux/m68k Architectures (BI_MACHTYPE)
64 */
65
66#define MACH_AMIGA 1
67#define MACH_ATARI 2
68#define MACH_MAC 3
69#define MACH_APOLLO 4
70#define MACH_SUN3 5
71#define MACH_MVME147 6
72#define MACH_MVME16x 7
73#define MACH_BVME6000 8
74#define MACH_HP300 9
75#define MACH_Q40 10
76#define MACH_SUN3X 11
77#define MACH_M54XX 12
78#define MACH_M5441X 13
79#define MACH_VIRT 14
80
81
82 /*
83 * CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE)
84 *
85 * Note: we may rely on the following equalities:
86 *
87 * CPU_68020 == MMU_68851
88 * CPU_68030 == MMU_68030
89 * CPU_68040 == FPU_68040 == MMU_68040
90 * CPU_68060 == FPU_68060 == MMU_68060
91 */
92
93#define CPUB_68020 0
94#define CPUB_68030 1
95#define CPUB_68040 2
96#define CPUB_68060 3
97#define CPUB_COLDFIRE 4
98
99#define CPU_68020 (1 << CPUB_68020)
100#define CPU_68030 (1 << CPUB_68030)
101#define CPU_68040 (1 << CPUB_68040)
102#define CPU_68060 (1 << CPUB_68060)
103#define CPU_COLDFIRE (1 << CPUB_COLDFIRE)
104
105#define FPUB_68881 0
106#define FPUB_68882 1
107#define FPUB_68040 2 /* Internal FPU */
108#define FPUB_68060 3 /* Internal FPU */
109#define FPUB_SUNFPA 4 /* Sun-3 FPA */
110#define FPUB_COLDFIRE 5 /* ColdFire FPU */
111
112#define FPU_68881 (1 << FPUB_68881)
113#define FPU_68882 (1 << FPUB_68882)
114#define FPU_68040 (1 << FPUB_68040)
115#define FPU_68060 (1 << FPUB_68060)
116#define FPU_SUNFPA (1 << FPUB_SUNFPA)
117#define FPU_COLDFIRE (1 << FPUB_COLDFIRE)
118
119#define MMUB_68851 0
120#define MMUB_68030 1 /* Internal MMU */
121#define MMUB_68040 2 /* Internal MMU */
122#define MMUB_68060 3 /* Internal MMU */
123#define MMUB_APOLLO 4 /* Custom Apollo */
124#define MMUB_SUN3 5 /* Custom Sun-3 */
125#define MMUB_COLDFIRE 6 /* Internal MMU */
126
127#define MMU_68851 (1 << MMUB_68851)
128#define MMU_68030 (1 << MMUB_68030)
129#define MMU_68040 (1 << MMUB_68040)
130#define MMU_68060 (1 << MMUB_68060)
131#define MMU_SUN3 (1 << MMUB_SUN3)
132#define MMU_APOLLO (1 << MMUB_APOLLO)
133#define MMU_COLDFIRE (1 << MMUB_COLDFIRE)
134
135
136 /*
137 * Stuff for bootinfo interface versioning
138 *
139 * At the start of kernel code, a 'struct bootversion' is located.
140 * bootstrap checks for a matching version of the interface before booting
141 * a kernel, to avoid user confusion if kernel and bootstrap don't work
142 * together :-)
143 *
144 * If incompatible changes are made to the bootinfo interface, the major
145 * number below should be stepped (and the minor reset to 0) for the
146 * appropriate machine. If a change is backward-compatible, the minor
147 * should be stepped. "Backwards-compatible" means that booting will work,
148 * but certain features may not.
149 */
150
151#define BOOTINFOV_MAGIC 0x4249561A /* 'BIV^Z' */
152#define MK_BI_VERSION(major, minor) (((major) << 16) + (minor))
153#define BI_VERSION_MAJOR(v) (((v) >> 16) & 0xffff)
154#define BI_VERSION_MINOR(v) ((v) & 0xffff)
155
156struct bootversion {
157 uint16_t branch;
158 uint32_t magic;
159 struct {
160 uint32_t machtype;
161 uint32_t version;
162 } machversions[0];
163} QEMU_PACKED;
164
165
166#endif /* _UAPI_ASM_M68K_BOOTINFO_H */