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 /* 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 29 struct 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 36 struct 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) 155 156 struct 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 */ 167