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 _ASM_M68K_BOOTINFO_H 13 #define _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 } __attribute__((packed)); 172 173 #endif /* __ASSEMBLY__ */ 174 175 176 #endif /* _ASM_M68K_BOOTINFO_H */