include/grub/i386/linux.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2003,2004,2007,2008,2009  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_INITRD_MAX_ADDRESS   0x37FFFFFF
  25 #define GRUB_LINUX_MAX_SETUP_SECTS      64
  26 #define GRUB_LINUX_BOOT_LOADER_TYPE     0x72
  27 #define GRUB_LINUX_HEAP_END_OFFSET      (0x9000 - 0x200)
  28
  29 #define GRUB_LINUX_BZIMAGE_ADDR         0x100000
  30 #define GRUB_LINUX_ZIMAGE_ADDR          0x10000
  31 #define GRUB_LINUX_OLD_REAL_MODE_ADDR   0x90000
  32 #define GRUB_LINUX_SETUP_STACK          0x9000
  33
  34 #define GRUB_LINUX_FLAG_BIG_KERNEL      0x1
  35 #define GRUB_LINUX_FLAG_QUIET           0x20
  36 #define GRUB_LINUX_FLAG_CAN_USE_HEAP    0x80
  37
  38 /* Linux's video mode selection support. Actually I hate it!  */
  39 #define GRUB_LINUX_VID_MODE_NORMAL      0xFFFF
  40 #define GRUB_LINUX_VID_MODE_EXTENDED    0xFFFE
  41 #define GRUB_LINUX_VID_MODE_ASK         0xFFFD
  42 #define GRUB_LINUX_VID_MODE_VESA_START  0x0300
  43
  44 #define GRUB_LINUX_SETUP_MOVE_SIZE      0x9100
  45 #define GRUB_LINUX_CL_MAGIC             0xA33F
  46
  47 #ifdef __x86_64__
  48
  49 #define GRUB_LINUX_EFI_SIGNATURE        \
  50   ('4' << 24 | '6' << 16 | 'L' << 8 | 'E')
  51
  52 #else
  53
  54 #define GRUB_LINUX_EFI_SIGNATURE        \
  55   ('2' << 24 | '3' << 16 | 'L' << 8 | 'E')
  56
  57 #endif
  58
  59 #define GRUB_LINUX_EFI_SIGNATURE_0204   \
  60   ('L' << 24 | 'I' << 16 | 'F' << 8 | 'E')
  61
  62 #define GRUB_LINUX_OFW_SIGNATURE        \
  63   (' ' << 24 | 'W' << 16 | 'F' << 8 | 'O')
  64
  65 #ifndef ASM_FILE
  66
  67 #define GRUB_E820_RAM        1
  68 #define GRUB_E820_RESERVED   2
  69 #define GRUB_E820_ACPI       3
  70 #define GRUB_E820_NVS        4
  71 #define GRUB_E820_EXEC_CODE  5
  72
  73 #define GRUB_E820_MAX_ENTRY  128
  74
  75 struct grub_e820_mmap
  76 {
  77   grub_uint64_t addr;
  78   grub_uint64_t size;
  79   grub_uint32_t type;
  80 } __attribute__((packed));
  81
  82 #define GRUB_VIDEO_TYPE_TEXT    0x01
  83 #define GRUB_VIDEO_TYPE_VLFB    0x23    /* VESA VGA in graphic mode     */
  84 #define GRUB_VIDEO_TYPE_EFI     0x70
  85
  86 /* For the Linux/i386 boot protocol version 2.03.  */
  87 struct linux_kernel_header
  88 {
  89   grub_uint8_t code1[0x0020];
  90   grub_uint16_t cl_magic;               /* Magic number 0xA33F */
  91   grub_uint16_t cl_offset;              /* The offset of command line */
  92   grub_uint8_t code2[0x01F1 - 0x0020 - 2 - 2];
  93   grub_uint8_t setup_sects;             /* The size of the setup in sectors */
  94   grub_uint16_t root_flags;             /* If the root is mounted readonly */
  95   grub_uint16_t syssize;                /* obsolete */
  96   grub_uint16_t swap_dev;               /* obsolete */
  97   grub_uint16_t ram_size;               /* obsolete */
  98   grub_uint16_t vid_mode;               /* Video mode control */
  99   grub_uint16_t root_dev;               /* Default root device number */
 100   grub_uint16_t boot_flag;              /* 0xAA55 magic number */
 101   grub_uint16_t jump;                   /* Jump instruction */
 102   grub_uint32_t header;                 /* Magic signature "HdrS" */
 103   grub_uint16_t version;                /* Boot protocol version supported */
 104   grub_uint32_t realmode_swtch;         /* Boot loader hook */
 105   grub_uint16_t start_sys;              /* The load-low segment (obsolete) */
 106   grub_uint16_t kernel_version;         /* Points to kernel version string */
 107   grub_uint8_t type_of_loader;          /* Boot loader identifier */
 108 #define LINUX_LOADER_ID_LILO            0x0
 109 #define LINUX_LOADER_ID_LOADLIN         0x1
 110 #define LINUX_LOADER_ID_BOOTSECT        0x2
 111 #define LINUX_LOADER_ID_SYSLINUX        0x3
 112 #define LINUX_LOADER_ID_ETHERBOOT       0x4
 113 #define LINUX_LOADER_ID_ELILO           0x5
 114 #define LINUX_LOADER_ID_GRUB            0x7
 115 #define LINUX_LOADER_ID_UBOOT           0x8
 116 #define LINUX_LOADER_ID_XEN             0x9
 117 #define LINUX_LOADER_ID_GUJIN           0xa
 118 #define LINUX_LOADER_ID_QEMU            0xb
 119   grub_uint8_t loadflags;               /* Boot protocol option flags */
 120   grub_uint16_t setup_move_size;        /* Move to high memory size */
 121   grub_uint32_t code32_start;           /* Boot loader hook */
 122   grub_uint32_t ramdisk_image;          /* initrd load address */
 123   grub_uint32_t ramdisk_size;           /* initrd size */
 124   grub_uint32_t bootsect_kludge;        /* obsolete */
 125   grub_uint16_t heap_end_ptr;           /* Free memory after setup end */
 126   grub_uint16_t pad1;                   /* Unused */
 127   char *cmd_line_ptr;                   /* Points to the kernel command line */
 128   grub_uint32_t initrd_addr_max;        /* Highest address for initrd */
 129 } __attribute__ ((packed));
 130
 131 /* Boot parameters for Linux based on 2.6.12. This is used by the setup
 132    sectors of Linux, and must be simulated by GRUB on EFI, because
 133    the setup sectors depend on BIOS.  */
 134 struct linux_kernel_params
 135 {
 136   grub_uint8_t video_cursor_x;          /* 0 */
 137   grub_uint8_t video_cursor_y;
 138
 139   grub_uint16_t ext_mem;                /* 2 */
 140
 141   grub_uint16_t video_page;             /* 4 */
 142   grub_uint8_t video_mode;              /* 6 */
 143   grub_uint8_t video_width;             /* 7 */
 144
 145   grub_uint8_t padding1[0xa - 0x8];
 146
 147   grub_uint16_t video_ega_bx;           /* a */
 148
 149   grub_uint8_t padding2[0xe - 0xc];
 150
 151   grub_uint8_t video_height;            /* e */
 152   grub_uint8_t have_vga;                /* f */
 153   grub_uint16_t font_size;              /* 10 */
 154
 155   grub_uint16_t lfb_width;              /* 12 */
 156   grub_uint16_t lfb_height;             /* 14 */
 157   grub_uint16_t lfb_depth;              /* 16 */
 158   grub_uint32_t lfb_base;               /* 18 */
 159   grub_uint32_t lfb_size;               /* 1c */
 160
 161   grub_uint16_t cl_magic;               /* 20 */
 162   grub_uint16_t cl_offset;
 163
 164   grub_uint16_t lfb_line_len;           /* 24 */
 165   grub_uint8_t red_mask_size;           /* 26 */
 166   grub_uint8_t red_field_pos;
 167   grub_uint8_t green_mask_size;
 168   grub_uint8_t green_field_pos;
 169   grub_uint8_t blue_mask_size;
 170   grub_uint8_t blue_field_pos;
 171   grub_uint8_t reserved_mask_size;
 172   grub_uint8_t reserved_field_pos;
 173   grub_uint16_t vesapm_segment;         /* 2e */
 174   grub_uint16_t vesapm_offset;          /* 30 */
 175   grub_uint16_t lfb_pages;              /* 32 */
 176   grub_uint16_t vesa_attrib;            /* 34 */
 177   grub_uint32_t capabilities;           /* 36 */
 178
 179   grub_uint8_t padding3[0x40 - 0x3a];
 180
 181   grub_uint16_t apm_version;            /* 40 */
 182   grub_uint16_t apm_code_segment;       /* 42 */
 183   grub_uint32_t apm_entry;              /* 44 */
 184   grub_uint16_t apm_16bit_code_segment; /* 48 */
 185   grub_uint16_t apm_data_segment;       /* 4a */
 186   grub_uint16_t apm_flags;              /* 4c */
 187   grub_uint32_t apm_code_len;           /* 4e */
 188   grub_uint16_t apm_data_len;           /* 52 */
 189
 190   grub_uint8_t padding4[0x60 - 0x54];
 191
 192   grub_uint32_t ist_signature;          /* 60 */
 193   grub_uint32_t ist_command;            /* 64 */
 194   grub_uint32_t ist_event;              /* 68 */
 195   grub_uint32_t ist_perf_level;         /* 6c */
 196
 197   grub_uint8_t padding5[0x80 - 0x70];
 198
 199   grub_uint8_t hd0_drive_info[0x10];    /* 80 */
 200   grub_uint8_t hd1_drive_info[0x10];    /* 90 */
 201   grub_uint16_t rom_config_len;         /* a0 */
 202
 203   grub_uint8_t padding6[0xb0 - 0xa2];
 204
 205   grub_uint32_t ofw_signature;          /* b0 */
 206   grub_uint32_t ofw_num_items;          /* b4 */
 207   grub_uint32_t ofw_cif_handler;        /* b8 */
 208   grub_uint32_t ofw_idt;                /* bc */
 209
 210   grub_uint8_t padding7[0x1b8 - 0xc0];
 211
 212   union
 213     {
 214       struct
 215         {
 216           grub_uint32_t efi_system_table;       /* 1b8 */
 217           grub_uint32_t padding7_1;             /* 1bc */
 218           grub_uint32_t efi_signature;          /* 1c0 */
 219           grub_uint32_t efi_mem_desc_size;      /* 1c4 */
 220           grub_uint32_t efi_mem_desc_version;   /* 1c8 */
 221           grub_uint32_t efi_mmap_size;          /* 1cc */
 222           grub_uint32_t efi_mmap;               /* 1d0 */
 223         } v0204;
 224       struct
 225         {
 226           grub_uint32_t padding7_1;             /* 1b8 */
 227           grub_uint32_t padding7_2;             /* 1bc */
 228           grub_uint32_t efi_signature;          /* 1c0 */
 229           grub_uint32_t efi_system_table;       /* 1c4 */
 230           grub_uint32_t efi_mem_desc_size;      /* 1c8 */
 231           grub_uint32_t efi_mem_desc_version;   /* 1cc */
 232           grub_uint32_t efi_mmap;               /* 1d0 */
 233           grub_uint32_t efi_mmap_size;          /* 1d4 */
 234           grub_uint32_t efi_system_table_hi;    /* 1d8 */
 235           grub_uint32_t efi_mmap_hi;            /* 1dc */
 236         } v0206;
 237     };
 238
 239   grub_uint32_t alt_mem;                /* 1e0 */
 240
 241   grub_uint8_t padding8[0x1e8 - 0x1e4];
 242
 243   grub_uint8_t mmap_size;               /* 1e8 */
 244
 245   grub_uint8_t padding9[0x1f1 - 0x1e9];
 246
 247   grub_uint8_t setup_sects;             /* The size of the setup in sectors */
 248   grub_uint16_t root_flags;             /* If the root is mounted readonly */
 249   grub_uint16_t syssize;                /* obsolete */
 250   grub_uint16_t swap_dev;               /* obsolete */
 251   grub_uint16_t ram_size;               /* obsolete */
 252   grub_uint16_t vid_mode;               /* Video mode control */
 253   grub_uint16_t root_dev;               /* Default root device number */
 254
 255   grub_uint8_t padding10;               /* 1fe */
 256   grub_uint8_t ps_mouse;                /* 1ff */
 257
 258   grub_uint16_t jump;                   /* Jump instruction */
 259   grub_uint32_t header;                 /* Magic signature "HdrS" */
 260   grub_uint16_t version;                /* Boot protocol version supported */
 261   grub_uint32_t realmode_swtch;         /* Boot loader hook */
 262   grub_uint16_t start_sys;              /* The load-low segment (obsolete) */
 263   grub_uint16_t kernel_version;         /* Points to kernel version string */
 264   grub_uint8_t type_of_loader;          /* Boot loader identifier */
 265   grub_uint8_t loadflags;               /* Boot protocol option flags */
 266   grub_uint16_t setup_move_size;        /* Move to high memory size */
 267   grub_uint32_t code32_start;           /* Boot loader hook */
 268   grub_uint32_t ramdisk_image;          /* initrd load address */
 269   grub_uint32_t ramdisk_size;           /* initrd size */
 270   grub_uint32_t bootsect_kludge;        /* obsolete */
 271   grub_uint16_t heap_end_ptr;           /* Free memory after setup end */
 272   grub_uint16_t pad1;                   /* Unused */
 273   grub_uint32_t cmd_line_ptr;           /* Points to the kernel command line */
 274
 275   grub_uint8_t pad2[164];               /* 22c */
 276   struct grub_e820_mmap e820_map[GRUB_E820_MAX_ENTRY];  /* 2d0 */
 277
 278 } __attribute__ ((packed));
 279 #endif /* ! ASM_FILE */
 280
 281 #endif /* ! GRUB_LINUX_MACHINE_HEADER */