arch/m68k/include/uapi/asm/bootinfo.h

   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 */