include/standard-headers/asm-m68k/bootinfo.h

   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  * A random seed used to initialize the RNG. Record format:
  62  *
  63  *   - length       [ 2 bytes, 16-bit big endian ]
  64  *   - seed data    [ `length` bytes, padded to preserve 4-byte struct alignment ]
  65  */
  66 #define BI_RNG_SEED             0x0008
  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 #define MACH_M5441X             13
  85 #define MACH_VIRT               14
  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 struct bootversion {
 163         uint16_t branch;
 164         uint32_t magic;
 165         struct {
 166                 uint32_t machtype;
 167                 uint32_t version;
 168         } machversions[0];
 169 } QEMU_PACKED;
 170
 171
 172 #endif /* _UAPI_ASM_M68K_BOOTINFO_H */