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