util/mkelfImage/linux-i386/x86-linux.h

   1 #ifndef X86_LINUX_H
   2 #define X86_LINUX_H
   3
   4 #define E820MAP 0x2d0           /* our map */
   5 #define E820MAX 32              /* number of entries in E820MAP */
   6 #define E820NR  0x1e8           /* # entries in E820MAP */
   7
   8 #ifndef ASSEMBLY
   9
  10 struct e820entry {
  11         uint64_t addr;  /* start of memory segment */
  12         uint64_t size;  /* size of memory segment */
  13         uint32_t type;          /* type of memory segment */
  14 #define E820_RAM        1
  15 #define E820_RESERVED   2
  16 #define E820_ACPI       3 /* usable as RAM once ACPI tables have been read */
  17 #define E820_NVS        4
  18 } __attribute__((packed));
  19
  20 /* FIXME expand on drive_info_struct... */
  21 struct drive_info_struct {
  22         uint8_t dummy[32];
  23 };
  24 struct sys_desc_table {
  25         uint16_t length;
  26         uint8_t  table[318];
  27 };
  28
  29 struct apm_bios_info {
  30         uint16_t version;       /* 0x40 */
  31         uint16_t cseg;          /* 0x42 */
  32         uint32_t offset;        /* 0x44 */
  33         uint16_t cseg_16;       /* 0x48 */
  34         uint16_t dseg;          /* 0x4a */
  35         uint16_t flags;         /* 0x4c */
  36         uint16_t cseg_len;      /* 0x4e */
  37         uint16_t cseg_16_len;   /* 0x50 */
  38         uint16_t dseg_len;      /* 0x52 */
  39         uint8_t  reserved[44];  /* 0x54 */
  40 };
  41
  42
  43 struct x86_linux_param_header {
  44         uint8_t  orig_x;                        /* 0x00 */
  45         uint8_t  orig_y;                        /* 0x01 */
  46         uint16_t ext_mem_k;                     /* 0x02 -- EXT_MEM_K sits here */
  47         uint16_t orig_video_page;               /* 0x04 */
  48         uint8_t  orig_video_mode;               /* 0x06 */
  49         uint8_t  orig_video_cols;               /* 0x07 */
  50         uint16_t unused2;                       /* 0x08 */
  51         uint16_t orig_video_ega_bx;             /* 0x0a */
  52         uint16_t unused3;                       /* 0x0c */
  53         uint8_t  orig_video_lines;              /* 0x0e */
  54         uint8_t  orig_video_isVGA;              /* 0x0f */
  55         uint16_t orig_video_points;             /* 0x10 */
  56
  57         /* VESA graphic mode -- linear frame buffer */
  58         uint16_t lfb_width;                     /* 0x12 */
  59         uint16_t lfb_height;                    /* 0x14 */
  60         uint16_t lfb_depth;                     /* 0x16 */
  61         uint32_t lfb_base;                      /* 0x18 */
  62         uint32_t lfb_size;                      /* 0x1c */
  63         uint16_t cl_magic;                      /* 0x20 */
  64 #define CL_MAGIC_VALUE 0xA33F
  65         uint16_t cl_offset;                     /* 0x22 */
  66         uint16_t lfb_linelength;                /* 0x24 */
  67         uint8_t  red_size;                      /* 0x26 */
  68         uint8_t  red_pos;                       /* 0x27 */
  69         uint8_t  green_size;                    /* 0x28 */
  70         uint8_t  green_pos;                     /* 0x29 */
  71         uint8_t  blue_size;                     /* 0x2a */
  72         uint8_t  blue_pos;                      /* 0x2b */
  73         uint8_t  rsvd_size;                     /* 0x2c */
  74         uint8_t  rsvd_pos;                      /* 0x2d */
  75         uint16_t vesapm_seg;                    /* 0x2e */
  76         uint16_t vesapm_off;                    /* 0x30 */
  77         uint16_t pages;                         /* 0x32 */
  78         uint8_t  reserved4[12];                 /* 0x34 -- 0x3f reserved for future expansion */
  79
  80         struct apm_bios_info apm_bios_info;     /* 0x40 */
  81         struct drive_info_struct drive_info;    /* 0x80 */
  82         struct sys_desc_table sys_desc_table;   /* 0xa0 */
  83         uint32_t alt_mem_k;                     /* 0x1e0 */
  84         uint8_t  reserved5[4];                  /* 0x1e4 */
  85         uint8_t  e820_map_nr;                   /* 0x1e8 */
  86         uint8_t  reserved6[8];                  /* 0x1e9 */
  87         uint8_t  setup_sects;                   /* 0x1f1 */
  88         uint16_t mount_root_rdonly;             /* 0x1f2 */
  89         uint8_t  reserved7[4];                  /* 0x1f4 */
  90         uint16_t ramdisk_flags;                 /* 0x1f8 */
  91 #define RAMDISK_IMAGE_START_MASK        0x07FF
  92 #define RAMDISK_PROMPT_FLAG             0x8000
  93 #define RAMDISK_LOAD_FLAG               0x4000
  94         uint16_t vid_mode;                      /* 0x1fa */
  95         uint16_t root_dev;                      /* 0x1fc */
  96         uint8_t  reserved9[1];                  /* 0x1fe */
  97         uint8_t  aux_device_info;               /* 0x1ff */
  98         /* 2.00+ */
  99         uint8_t  reserved10[2];                 /* 0x200 */
 100         uint8_t  header_magic[4];               /* 0x202 */
 101         uint16_t protocol_version;              /* 0x206 */
 102         uint8_t  reserved11[8];                 /* 0x208 */
 103         uint8_t  loader_type;                   /* 0x210 */
 104 #define LOADER_TYPE_LOADLIN         1
 105 #define LOADER_TYPE_BOOTSECT_LOADER 2
 106 #define LOADER_TYPE_SYSLINUX        3
 107 #define LOADER_TYPE_ETHERBOOT       4
 108 #define LOADER_TYPE_UNKNOWN         0xFF
 109         uint8_t  loader_flags;                  /* 0x211 */
 110         uint8_t  reserved12[2];                 /* 0x212 */
 111         uint32_t kernel_start;                  /* 0x214 */
 112         uint32_t initrd_start;                  /* 0x218 */
 113         uint32_t initrd_size;                   /* 0x21c */
 114         uint8_t  reserved13[4];                 /* 0x220 */
 115         /* 2.01+ */
 116         uint16_t heap_end_ptr;                  /* 0x224 */
 117         uint8_t  reserved14[2];                 /* 0x226 */
 118         /* 2.02+ */
 119         uint32_t cmd_line_ptr;                  /* 0x228 */
 120         /* 2.03+ */
 121         uint32_t initrd_addr_max;               /* 0x22c */
 122         uint8_t  reserved15[160];               /* 0x230 */
 123         struct e820entry e820_map[E820MAX];     /* 0x2d0 */
 124                                                 /* 0x550 */
 125 #define COMMAND_LINE_SIZE 256
 126 };
 127
 128 struct x86_linux_header {
 129         uint8_t  reserved1[0x1f1];              /* 0x000 */
 130         uint8_t  setup_sects;                   /* 0x1f1 */
 131         uint16_t root_flags;                    /* 0x1f2 */
 132         uint8_t  reserved2[6];                  /* 0x1f4 */
 133         uint16_t vid_mode;                      /* 0x1fa */
 134         uint16_t root_dev;                      /* 0x1fc */
 135         uint16_t boot_sector_magic;             /* 0x1fe */
 136         /* 2.00+ */
 137         uint8_t  reserved3[2];                  /* 0x200 */
 138         uint8_t  header_magic[4];               /* 0x202 */
 139         uint16_t protocol_version;              /* 0x206 */
 140         uint32_t realmode_swtch;                /* 0x208 */
 141         uint16_t start_sys;                     /* 0x20c */
 142         uint16_t kver_addr;                     /* 0x20e */
 143         uint8_t  type_of_loader;                /* 0x210 */
 144         uint8_t  loadflags;                     /* 0x211 */
 145         uint16_t setup_move_size;               /* 0x212 */
 146         uint32_t code32_start;                  /* 0x214 */
 147         uint32_t ramdisk_image;                 /* 0x218 */
 148         uint32_t ramdisk_size;                  /* 0x21c */
 149         uint8_t  reserved4[4];                  /* 0x220 */
 150         /* 2.01+ */
 151         uint16_t heap_end_ptr;                  /* 0x224 */
 152         uint8_t  reserved5[2];                  /* 0x226 */
 153         /* 2.02+ */
 154         uint32_t cmd_line_ptr;                  /* 0x228 */
 155         /* 2.03+ */
 156         uint32_t initrd_addr_max;               /* 0x22c */
 157         uint8_t  tail[32*1024];                 /* 0x230 */
 158 } __attribute__ ((packed));
 159
 160 #endif /* ASSEMBLY */
 161
 162 #endif /* X86_LINUX_H */