include/grub/i386/linux.h

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 1999,2000,2001,2002,2003,2004,2007  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
  42 #define GRUB_LINUX_CL_OFFSET            0x9000
  43 #define GRUB_LINUX_CL_END_OFFSET        0x90FF
  44 #define GRUB_LINUX_SETUP_MOVE_SIZE      0x9100
  45 #define GRUB_LINUX_CL_MAGIC             0xA33F
  46
  47 #define GRUB_LINUX_EFI_SIGNATURE        \
  48   ('E' << 24 | 'F' << 16 | 'I' << 8 | 'L')
  49
  50 #ifndef ASM_FILE
  51
  52 /* For the Linux/i386 boot protocol version 2.03.  */
  53 struct linux_kernel_header
  54 {
  55   grub_uint8_t code1[0x0020];
  56   grub_uint16_t cl_magic;               /* Magic number 0xA33F */
  57   grub_uint16_t cl_offset;              /* The offset of command line */
  58   grub_uint8_t code2[0x01F1 - 0x0020 - 2 - 2];
  59   grub_uint8_t setup_sects;             /* The size of the setup in sectors */
  60   grub_uint16_t root_flags;             /* If the root is mounted readonly */
  61   grub_uint16_t syssize;                /* obsolete */
  62   grub_uint16_t swap_dev;               /* obsolete */
  63   grub_uint16_t ram_size;               /* obsolete */
  64   grub_uint16_t vid_mode;               /* Video mode control */
  65   grub_uint16_t root_dev;               /* Default root device number */
  66   grub_uint16_t boot_flag;              /* 0xAA55 magic number */
  67   grub_uint16_t jump;                   /* Jump instruction */
  68   grub_uint32_t header;                 /* Magic signature "HdrS" */
  69   grub_uint16_t version;                /* Boot protocol version supported */
  70   grub_uint32_t realmode_swtch;         /* Boot loader hook */
  71   grub_uint16_t start_sys;              /* The load-low segment (obsolete) */
  72   grub_uint16_t kernel_version;         /* Points to kernel version string */
  73   grub_uint8_t type_of_loader;          /* Boot loader identifier */
  74   grub_uint8_t loadflags;               /* Boot protocol option flags */
  75   grub_uint16_t setup_move_size;        /* Move to high memory size */
  76   grub_uint32_t code32_start;           /* Boot loader hook */
  77   grub_uint32_t ramdisk_image;          /* initrd load address */
  78   grub_uint32_t ramdisk_size;           /* initrd size */
  79   grub_uint32_t bootsect_kludge;        /* obsolete */
  80   grub_uint16_t heap_end_ptr;           /* Free memory after setup end */
  81   grub_uint16_t pad1;                   /* Unused */
  82   char *cmd_line_ptr;                   /* Points to the kernel command line */
  83   grub_uint32_t initrd_addr_max;        /* Highest address for initrd */
  84 } __attribute__ ((packed));
  85
  86 /* Boot parameters for Linux based on 2.6.12. This is used by the setup
  87    sectors of Linux, and must be simulated by GRUB on EFI, because
  88    the setup sectors depend on BIOS.  */
  89 struct linux_kernel_params
  90 {
  91   grub_uint8_t video_cursor_x;          /* 0 */
  92   grub_uint8_t video_cursor_y;
  93
  94   grub_uint16_t ext_mem;                /* 2 */
  95
  96   grub_uint16_t video_page;             /* 4 */
  97   grub_uint8_t video_mode;              /* 6 */
  98   grub_uint8_t video_width;             /* 7 */
  99
 100   grub_uint8_t padding1[0xa - 0x8];
 101
 102   grub_uint16_t video_ega_bx;           /* a */
 103
 104   grub_uint8_t padding2[0xe - 0xc];
 105
 106   grub_uint8_t video_height;            /* e */
 107   grub_uint8_t have_vga;                /* f */
 108   grub_uint16_t font_size;              /* 10 */
 109
 110   grub_uint16_t lfb_width;              /* 12 */
 111   grub_uint16_t lfb_height;             /* 14 */
 112   grub_uint16_t lfb_depth;              /* 16 */
 113   grub_uint32_t lfb_base;               /* 18 */
 114   grub_uint32_t lfb_size;               /* 1c */
 115
 116   grub_uint16_t cl_magic;               /* 20 */
 117   grub_uint16_t cl_offset;
 118
 119   grub_uint16_t lfb_line_len;           /* 24 */
 120   grub_uint8_t red_mask_size;           /* 26 */
 121   grub_uint8_t red_field_pos;
 122   grub_uint8_t green_mask_size;
 123   grub_uint8_t green_field_pos;
 124   grub_uint8_t blue_mask_size;
 125   grub_uint8_t blue_field_pos;
 126   grub_uint8_t reserved_mask_size;
 127   grub_uint8_t reserved_field_pos;
 128   grub_uint16_t vesapm_segment;         /* 2e */
 129   grub_uint16_t vesapm_offset;          /* 30 */
 130   grub_uint16_t lfb_pages;              /* 32 */
 131   grub_uint16_t vesa_attrib;            /* 34 */
 132
 133   grub_uint8_t padding3[0x40 - 0x36];
 134
 135   grub_uint16_t apm_version;            /* 40 */
 136   grub_uint16_t apm_code_segment;       /* 42 */
 137   grub_uint32_t apm_entry;              /* 44 */
 138   grub_uint16_t apm_16bit_code_segment; /* 48 */
 139   grub_uint16_t apm_data_segment;       /* 4a */
 140   grub_uint16_t apm_flags;              /* 4c */
 141   grub_uint32_t apm_code_len;           /* 4e */
 142   grub_uint16_t apm_data_len;           /* 52 */
 143
 144   grub_uint8_t padding4[0x60 - 0x54];
 145
 146   grub_uint32_t ist_signature;          /* 60 */
 147   grub_uint32_t ist_command;            /* 64 */
 148   grub_uint32_t ist_event;              /* 68 */
 149   grub_uint32_t ist_perf_level;         /* 6c */
 150
 151   grub_uint8_t padding5[0x80 - 0x70];
 152
 153   grub_uint8_t hd0_drive_info[0x10];    /* 80 */
 154   grub_uint8_t hd1_drive_info[0x10];    /* 90 */
 155   grub_uint16_t rom_config_len;         /* a0 */
 156
 157   grub_uint8_t padding6[0x1c0 - 0xa2];
 158
 159   grub_uint32_t efi_signature;          /* 1c0 */
 160   grub_uint32_t efi_system_table;       /* 1c4 */
 161   grub_uint32_t efi_mem_desc_size;      /* 1c8 */
 162   grub_uint32_t efi_mem_desc_version;   /* 1cc */
 163   grub_uint32_t efi_mmap;               /* 1d0 */
 164   grub_uint32_t efi_mmap_size;          /* 1d4 */
 165
 166   grub_uint8_t padding7[0x1e0 - 0x1d8];
 167
 168   grub_uint32_t alt_mem;                /* 1e0 */
 169
 170   grub_uint8_t padding8[0x1e8 - 0x1e4];
 171
 172   grub_uint32_t mmap_size;              /* 1e8 */
 173
 174   grub_uint8_t padding9[0x1ff - 0x1ec];
 175
 176   grub_uint8_t ps_mouse;                /* 1ff */
 177 } __attribute__ ((packed));
 178 #endif /* ! ASM_FILE */
 179
 180 #endif /* ! GRUB_LINUX_MACHINE_HEADER */