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 */
177