include/grub/i386/linux.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2003,2004,2007,2008  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #ifndef GRUB_LINUX_MACHINE_HEADER
  20 #define GRUB_LINUX_MACHINE_HEADER       1
  21
  22 #define GRUB_LINUX_MAGIC_SIGNATURE      0x53726448      /* "HdrS" */
  23 #define GRUB_LINUX_DEFAULT_SETUP_SECTS  4
  24 #define GRUB_LINUX_FLAG_CAN_USE_HEAP    0x80
  25 #define GRUB_LINUX_INITRD_MAX_ADDRESS   0x37FFFFFF
  26 #define GRUB_LINUX_MAX_SETUP_SECTS      64
  27 #define GRUB_LINUX_BOOT_LOADER_TYPE     0x72
  28 #define GRUB_LINUX_HEAP_END_OFFSET      (0x9000 - 0x200)
  29
  30 #define GRUB_LINUX_BZIMAGE_ADDR         0x100000
  31 #define GRUB_LINUX_ZIMAGE_ADDR          0x10000
  32 #define GRUB_LINUX_OLD_REAL_MODE_ADDR   0x90000
  33 #define GRUB_LINUX_SETUP_STACK          0x9000
  34
  35 #define GRUB_LINUX_FLAG_BIG_KERNEL      0x1
  36
  37 /* Linux's video mode selection support. Actually I hate it!  */
  38 #define GRUB_LINUX_VID_MODE_NORMAL      0xFFFF
  39 #define GRUB_LINUX_VID_MODE_EXTENDED    0xFFFE
  40 #define GRUB_LINUX_VID_MODE_ASK         0xFFFD
  41 #define GRUB_LINUX_VID_MODE_VESA_START  0x0300
  42
  43 #define GRUB_LINUX_SETUP_MOVE_SIZE      0x9100
  44 #define GRUB_LINUX_CL_MAGIC             0xA33F
  45
  46 #ifdef __x86_64__
  47
  48 #define GRUB_LINUX_EFI_SIGNATURE        \
  49   ('4' << 24 | '6' << 16 | 'L' << 8 | 'E')
  50
  51 #else
  52
  53 #define GRUB_LINUX_EFI_SIGNATURE        \
  54   ('2' << 24 | '3' << 16 | 'L' << 8 | 'E')
  55
  56 #endif
  57
  58 #define GRUB_LINUX_EFI_SIGNATURE_0204   \
  59   ('L' << 24 | 'I' << 16 | 'F' << 8 | 'E')
  60
  61 #define GRUB_LINUX_OFW_SIGNATURE        \
  62   (' ' << 24 | 'W' << 16 | 'F' << 8 | 'O')
  63
  64 #ifndef ASM_FILE
  65
  66 #define GRUB_E820_RAM        1
  67 #define GRUB_E820_RESERVED   2
  68 #define GRUB_E820_ACPI       3
  69 #define GRUB_E820_NVS        4
  70 #define GRUB_E820_EXEC_CODE  5
  71
  72 #define GRUB_E820_MAX_ENTRY  128
  73
  74 struct grub_e820_mmap
  75 {
  76   grub_uint64_t addr;
  77   grub_uint64_t size;
  78   grub_uint32_t type;
  79 } __attribute__((packed));
  80
  81 #define GRUB_VIDEO_TYPE_VLFB    0x23    /* VESA VGA in graphic mode     */
  82 #define GRUB_VIDEO_TYPE_EFI     0x70
  83
  84 /* For the Linux/i386 boot protocol version 2.03.  */
  85 struct linux_kernel_header
  86 {
  87   grub_uint8_t code1[0x0020];
  88   grub_uint16_t cl_magic;               /* Magic number 0xA33F */
  89   grub_uint16_t cl_offset;              /* The offset of command line */
  90   grub_uint8_t code2[0x01F1 - 0x0020 - 2 - 2];
  91   grub_uint8_t setup_sects;             /* The size of the setup in sectors */
  92   grub_uint16_t root_flags;             /* If the root is mounted readonly */
  93   grub_uint16_t syssize;                /* obsolete */
  94   grub_uint16_t swap_dev;               /* obsolete */
  95   grub_uint16_t ram_size;               /* obsolete */
  96   grub_uint16_t vid_mode;               /* Video mode control */
  97   grub_uint16_t root_dev;               /* Default root device number */
  98   grub_uint16_t boot_flag;              /* 0xAA55 magic number */
  99   grub_uint16_t jump;                   /* Jump instruction */
 100   grub_uint32_t header;                 /* Magic signature "HdrS" */
 101   grub_uint16_t version;                /* Boot protocol version supported */
 102   grub_uint32_t realmode_swtch;         /* Boot loader hook */
 103   grub_uint16_t start_sys;              /* The load-low segment (obsolete) */
 104   grub_uint16_t kernel_version;         /* Points to kernel version string */
 105   grub_uint8_t type_of_loader;          /* Boot loader identifier */
 106 #define LINUX_LOADER_ID_LILO            0x0
 107 #define LINUX_LOADER_ID_LOADLIN         0x1
 108 #define LINUX_LOADER_ID_BOOTSECT        0x2
 109 #define LINUX_LOADER_ID_SYSLINUX        0x3
 110 #define LINUX_LOADER_ID_ETHERBOOT       0x4
 111 #define LINUX_LOADER_ID_ELILO           0x5
 112 #define LINUX_LOADER_ID_GRUB            0x7
 113 #define LINUX_LOADER_ID_UBOOT           0x8
 114 #define LINUX_LOADER_ID_XEN             0x9
 115 #define LINUX_LOADER_ID_GUJIN           0xa
 116 #define LINUX_LOADER_ID_QEMU            0xb
 117   grub_uint8_t loadflags;               /* Boot protocol option flags */
 118   grub_uint16_t setup_move_size;        /* Move to high memory size */
 119   grub_uint32_t code32_start;           /* Boot loader hook */
 120   grub_uint32_t ramdisk_image;          /* initrd load address */
 121   grub_uint32_t ramdisk_size;           /* initrd size */
 122   grub_uint32_t bootsect_kludge;        /* obsolete */
 123   grub_uint16_t heap_end_ptr;           /* Free memory after setup end */
 124   grub_uint16_t pad1;                   /* Unused */
 125   char *cmd_line_ptr;                   /* Points to the kernel command line */
 126   grub_uint32_t initrd_addr_max;        /* Highest address for initrd */
 127 } __attribute__ ((packed));
 128
 129 /* Boot parameters for Linux based on 2.6.12. This is used by the setup
 130    sectors of Linux, and must be simulated by GRUB on EFI, because
 131    the setup sectors depend on BIOS.  */
 132 struct linux_kernel_params
 133 {
 134   grub_uint8_t video_cursor_x;          /* 0 */
 135   grub_uint8_t video_cursor_y;
 136
 137   grub_uint16_t ext_mem;                /* 2 */
 138
 139   grub_uint16_t video_page;             /* 4 */
 140   grub_uint8_t video_mode;              /* 6 */
 141   grub_uint8_t video_width;             /* 7 */
 142
 143   grub_uint8_t padding1[0xa - 0x8];
 144
 145   grub_uint16_t video_ega_bx;           /* a */
 146
 147   grub_uint8_t padding2[0xe - 0xc];
 148
 149   grub_uint8_t video_height;            /* e */
 150   grub_uint8_t have_vga;                /* f */
 151   grub_uint16_t font_size;              /* 10 */
 152
 153   grub_uint16_t lfb_width;              /* 12 */
 154   grub_uint16_t lfb_height;             /* 14 */
 155   grub_uint16_t lfb_depth;              /* 16 */
 156   grub_uint32_t lfb_base;               /* 18 */
 157   grub_uint32_t lfb_size;               /* 1c */
 158
 159   grub_uint16_t cl_magic;               /* 20 */
 160   grub_uint16_t cl_offset;
 161
 162   grub_uint16_t lfb_line_len;           /* 24 */
 163   grub_uint8_t red_mask_size;           /* 26 */
 164   grub_uint8_t red_field_pos;
 165   grub_uint8_t green_mask_size;
 166   grub_uint8_t green_field_pos;
 167   grub_uint8_t blue_mask_size;
 168   grub_uint8_t blue_field_pos;
 169   grub_uint8_t reserved_mask_size;
 170   grub_uint8_t reserved_field_pos;
 171   grub_uint16_t vesapm_segment;         /* 2e */
 172   grub_uint16_t vesapm_offset;          /* 30 */
 173   grub_uint16_t lfb_pages;              /* 32 */
 174   grub_uint16_t vesa_attrib;            /* 34 */
 175
 176   grub_uint8_t padding3[0x40 - 0x36];
 177
 178   grub_uint16_t apm_version;            /* 40 */
 179   grub_uint16_t apm_code_segment;       /* 42 */
 180   grub_uint32_t apm_entry;              /* 44 */
 181   grub_uint16_t apm_16bit_code_segment; /* 48 */
 182   grub_uint16_t apm_data_segment;       /* 4a */
 183   grub_uint16_t apm_flags;              /* 4c */
 184   grub_uint32_t apm_code_len;           /* 4e */
 185   grub_uint16_t apm_data_len;           /* 52 */
 186
 187   grub_uint8_t padding4[0x60 - 0x54];
 188
 189   grub_uint32_t ist_signature;          /* 60 */
 190   grub_uint32_t ist_command;            /* 64 */
 191   grub_uint32_t ist_event;              /* 68 */
 192   grub_uint32_t ist_perf_level;         /* 6c */
 193
 194   grub_uint8_t padding5[0x80 - 0x70];
 195
 196   grub_uint8_t hd0_drive_info[0x10];    /* 80 */
 197   grub_uint8_t hd1_drive_info[0x10];    /* 90 */
 198   grub_uint16_t rom_config_len;         /* a0 */
 199
 200   grub_uint8_t padding6[0xb0 - 0xa2];
 201
 202   grub_uint32_t ofw_signature;          /* b0 */
 203   grub_uint32_t ofw_num_items;          /* b4 */
 204   grub_uint32_t ofw_cif_handler;        /* b8 */
 205   grub_uint32_t ofw_idt;                /* bc */
 206
 207   grub_uint8_t padding7[0x1b8 - 0xc0];
 208
 209   union
 210     {
 211       struct
 212         {
 213           grub_uint32_t efi_system_table;       /* 1b8 */
 214           grub_uint32_t padding7_1;             /* 1bc */
 215           grub_uint32_t efi_signature;          /* 1c0 */
 216           grub_uint32_t efi_mem_desc_size;      /* 1c4 */
 217           grub_uint32_t efi_mem_desc_version;   /* 1c8 */
 218           grub_uint32_t efi_mmap_size;          /* 1cc */
 219           grub_uint32_t efi_mmap;               /* 1d0 */
 220         } v0204;
 221       struct
 222         {
 223           grub_uint32_t padding7_1;             /* 1b8 */
 224           grub_uint32_t padding7_2;             /* 1bc */
 225           grub_uint32_t efi_signature;          /* 1c0 */
 226           grub_uint32_t efi_system_table;       /* 1c4 */
 227           grub_uint32_t efi_mem_desc_size;      /* 1c8 */
 228           grub_uint32_t efi_mem_desc_version;   /* 1cc */
 229           grub_uint32_t efi_mmap;               /* 1d0 */
 230           grub_uint32_t efi_mmap_size;          /* 1d4 */
 231           grub_uint32_t efi_system_table_hi;    /* 1d8 */
 232           grub_uint32_t efi_mmap_hi;            /* 1dc */
 233         } v0206;
 234     };
 235
 236   grub_uint32_t alt_mem;                /* 1e0 */
 237
 238   grub_uint8_t padding8[0x1e8 - 0x1e4];
 239
 240   grub_uint32_t mmap_size;              /* 1e8 */
 241
 242   grub_uint8_t padding9[0x1f1 - 0x1ec];
 243
 244   grub_uint8_t setup_sects;             /* The size of the setup in sectors */
 245   grub_uint16_t root_flags;             /* If the root is mounted readonly */
 246   grub_uint16_t syssize;                /* obsolete */
 247   grub_uint16_t swap_dev;               /* obsolete */
 248   grub_uint16_t ram_size;               /* obsolete */
 249   grub_uint16_t vid_mode;               /* Video mode control */
 250   grub_uint16_t root_dev;               /* Default root device number */
 251
 252   grub_uint8_t padding10;               /* 1fe */
 253   grub_uint8_t ps_mouse;                /* 1ff */
 254
 255   grub_uint16_t jump;                   /* Jump instruction */
 256   grub_uint32_t header;                 /* Magic signature "HdrS" */
 257   grub_uint16_t version;                /* Boot protocol version supported */
 258   grub_uint32_t realmode_swtch;         /* Boot loader hook */
 259   grub_uint16_t start_sys;              /* The load-low segment (obsolete) */
 260   grub_uint16_t kernel_version;         /* Points to kernel version string */
 261   grub_uint8_t type_of_loader;          /* Boot loader identifier */
 262   grub_uint8_t loadflags;               /* Boot protocol option flags */
 263   grub_uint16_t setup_move_size;        /* Move to high memory size */
 264   grub_uint32_t code32_start;           /* Boot loader hook */
 265   grub_uint32_t ramdisk_image;          /* initrd load address */
 266   grub_uint32_t ramdisk_size;           /* initrd size */
 267   grub_uint32_t bootsect_kludge;        /* obsolete */
 268   grub_uint16_t heap_end_ptr;           /* Free memory after setup end */
 269   grub_uint16_t pad1;                   /* Unused */
 270   grub_uint32_t cmd_line_ptr;           /* Points to the kernel command line */
 271
 272   grub_uint8_t pad2[164];               /* 22c */
 273   struct grub_e820_mmap e820_map[GRUB_E820_MAX_ENTRY];  /* 2d0 */
 274
 275 } __attribute__ ((packed));
 276 #endif /* ! ASM_FILE */
 277
 278 #endif /* ! GRUB_LINUX_MACHINE_HEADER */