1 /* 2 * asm/bootinfo.h -- Definition of the Linux/m68k boot information structure 3 * 4 * Copyright 1992 by Greg Harp 5 * 6 * This file is subject to the terms and conditions of the GNU General Public 7 * License. See the file COPYING in the main directory of this archive 8 * for more details. 9 */ 10 11 #ifndef _UAPI_ASM_M68K_BOOTINFO_H 12 #define _UAPI_ASM_M68K_BOOTINFO_H 13 14 15 #include <linux/types.h> 16 17 18 #ifndef __ASSEMBLY__ 19 20 /* 21 * Bootinfo definitions 22 * 23 * This is an easily parsable and extendable structure containing all 24 * information to be passed from the bootstrap to the kernel. 25 * 26 * This way I hope to keep all future changes back/forewards compatible. 27 * Thus, keep your fingers crossed... 28 * 29 * This structure is copied right after the kernel by the bootstrap 30 * routine. 31 */ 32 33 struct bi_record { 34 __be16 tag; /* tag ID */ 35 __be16 size; /* size of record (in bytes) */ 36 __be32 data[0]; /* data */ 37 }; 38 39 40 struct mem_info { 41 __be32 addr; /* physical address of memory chunk */ 42 __be32 size; /* length of memory chunk (in bytes) */ 43 }; 44 45 #endif /* __ASSEMBLY__ */ 46 47 48 /* 49 * Tag Definitions 50 * 51 * Machine independent tags start counting from 0x0000 52 * Machine dependent tags start counting from 0x8000 53 */ 54 55 #define BI_LAST 0x0000 /* last record (sentinel) */ 56 #define BI_MACHTYPE 0x0001 /* machine type (__be32) */ 57 #define BI_CPUTYPE 0x0002 /* cpu type (__be32) */ 58 #define BI_FPUTYPE 0x0003 /* fpu type (__be32) */ 59 #define BI_MMUTYPE 0x0004 /* mmu type (__be32) */ 60 #define BI_MEMCHUNK 0x0005 /* memory chunk address and size */ 61 /* (struct mem_info) */ 62 #define BI_RAMDISK 0x0006 /* ramdisk address and size */ 63 /* (struct mem_info) */ 64 #define BI_COMMAND_LINE 0x0007 /* kernel command line parameters */ 65 /* (string) */ 66 67 68 /* 69 * Linux/m68k Architectures (BI_MACHTYPE) 70 */ 71 72 #define MACH_AMIGA 1 73 #define MACH_ATARI 2 74 #define MACH_MAC 3 75 #define MACH_APOLLO 4 76 #define MACH_SUN3 5 77 #define MACH_MVME147 6 78 #define MACH_MVME16x 7 79 #define MACH_BVME6000 8 80 #define MACH_HP300 9 81 #define MACH_Q40 10 82 #define MACH_SUN3X 11 83 #define MACH_M54XX 12 84 85 86 /* 87 * CPU, FPU and MMU types (BI_CPUTYPE, BI_FPUTYPE, BI_MMUTYPE) 88 * 89 * Note: we may rely on the following equalities: 90 * 91 * CPU_68020 == MMU_68851 92 * CPU_68030 == MMU_68030 93 * CPU_68040 == FPU_68040 == MMU_68040 94 * CPU_68060 == FPU_68060 == MMU_68060 95 */ 96 97 #define CPUB_68020 0 98 #define CPUB_68030 1 99 #define CPUB_68040 2 100 #define CPUB_68060 3 101 #define CPUB_COLDFIRE 4 102 103 #define CPU_68020 (1 << CPUB_68020) 104 #define CPU_68030 (1 << CPUB_68030) 105 #define CPU_68040 (1 << CPUB_68040) 106 #define CPU_68060 (1 << CPUB_68060) 107 #define CPU_COLDFIRE (1 << CPUB_COLDFIRE) 108 109 #define FPUB_68881 0 110 #define FPUB_68882 1 111 #define FPUB_68040 2 /* Internal FPU */ 112 #define FPUB_68060 3 /* Internal FPU */ 113 #define FPUB_SUNFPA 4 /* Sun-3 FPA */ 114 #define FPUB_COLDFIRE 5 /* ColdFire FPU */ 115 116 #define FPU_68881 (1 << FPUB_68881) 117 #define FPU_68882 (1 << FPUB_68882) 118 #define FPU_68040 (1 << FPUB_68040) 119 #define FPU_68060 (1 << FPUB_68060) 120 #define FPU_SUNFPA (1 << FPUB_SUNFPA) 121 #define FPU_COLDFIRE (1 << FPUB_COLDFIRE) 122 123 #define MMUB_68851 0 124 #define MMUB_68030 1 /* Internal MMU */ 125 #define MMUB_68040 2 /* Internal MMU */ 126 #define MMUB_68060 3 /* Internal MMU */ 127 #define MMUB_APOLLO 4 /* Custom Apollo */ 128 #define MMUB_SUN3 5 /* Custom Sun-3 */ 129 #define MMUB_COLDFIRE 6 /* Internal MMU */ 130 131 #define MMU_68851 (1 << MMUB_68851) 132 #define MMU_68030 (1 << MMUB_68030) 133 #define MMU_68040 (1 << MMUB_68040) 134 #define MMU_68060 (1 << MMUB_68060) 135 #define MMU_SUN3 (1 << MMUB_SUN3) 136 #define MMU_APOLLO (1 << MMUB_APOLLO) 137 #define MMU_COLDFIRE (1 << MMUB_COLDFIRE) 138 139 140 /* 141 * Stuff for bootinfo interface versioning 142 * 143 * At the start of kernel code, a 'struct bootversion' is located. 144 * bootstrap checks for a matching version of the interface before booting 145 * a kernel, to avoid user confusion if kernel and bootstrap don't work 146 * together :-) 147 * 148 * If incompatible changes are made to the bootinfo interface, the major 149 * number below should be stepped (and the minor reset to 0) for the 150 * appropriate machine. If a change is backward-compatible, the minor 151 * should be stepped. "Backwards-compatible" means that booting will work, 152 * but certain features may not. 153 */ 154 155 #define BOOTINFOV_MAGIC 0x4249561A /* 'BIV^Z' */ 156 #define MK_BI_VERSION(major, minor) (((major) << 16) + (minor)) 157 #define BI_VERSION_MAJOR(v) (((v) >> 16) & 0xffff) 158 #define BI_VERSION_MINOR(v) ((v) & 0xffff) 159 160 #ifndef __ASSEMBLY__ 161 162 struct bootversion { 163 __be16 branch; 164 __be32 magic; 165 struct { 166 __be32 machtype; 167 __be32 version; 168 } machversions[0]; 169 } __packed; 170 171 #endif /* __ASSEMBLY__ */ 172 173 174 #endif /* _UAPI_ASM_M68K_BOOTINFO_H */ 175