arch/x86/boot/vesa.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /* ----------------------------------------------------------------------- *
   3  *
   4  *   Copyright 1999-2007 H. Peter Anvin - All Rights Reserved
   5  *
   6  * ----------------------------------------------------------------------- */
   7
   8 #ifndef BOOT_VESA_H
   9 #define BOOT_VESA_H
  10
  11 typedef struct {
  12         u16 off, seg;
  13 } far_ptr;
  14
  15 /* VESA General Information table */
  16 struct vesa_general_info {
  17         u32 signature;          /* 0 Magic number = "VESA" */
  18         u16 version;            /* 4 */
  19         far_ptr vendor_string;  /* 6 */
  20         u32 capabilities;       /* 10 */
  21         far_ptr video_mode_ptr; /* 14 */
  22         u16 total_memory;       /* 18 */
  23
  24         u8 reserved[236];       /* 20 */
  25 } __attribute__ ((packed));
  26
  27 #define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))
  28
  29 struct vesa_mode_info {
  30         u16 mode_attr;          /* 0 */
  31         u8 win_attr[2];         /* 2 */
  32         u16 win_grain;          /* 4 */
  33         u16 win_size;           /* 6 */
  34         u16 win_seg[2];         /* 8 */
  35         far_ptr win_scheme;     /* 12 */
  36         u16 logical_scan;       /* 16 */
  37
  38         u16 h_res;              /* 18 */
  39         u16 v_res;              /* 20 */
  40         u8 char_width;          /* 22 */
  41         u8 char_height;         /* 23 */
  42         u8 memory_planes;       /* 24 */
  43         u8 bpp;                 /* 25 */
  44         u8 banks;               /* 26 */
  45         u8 memory_layout;       /* 27 */
  46         u8 bank_size;           /* 28 */
  47         u8 image_planes;        /* 29 */
  48         u8 page_function;       /* 30 */
  49
  50         u8 rmask;               /* 31 */
  51         u8 rpos;                /* 32 */
  52         u8 gmask;               /* 33 */
  53         u8 gpos;                /* 34 */
  54         u8 bmask;               /* 35 */
  55         u8 bpos;                /* 36 */
  56         u8 resv_mask;           /* 37 */
  57         u8 resv_pos;            /* 38 */
  58         u8 dcm_info;            /* 39 */
  59
  60         u32 lfb_ptr;            /* 40 Linear frame buffer address */
  61         u32 offscreen_ptr;      /* 44 Offscreen memory address */
  62         u16 offscreen_size;     /* 48 */
  63
  64         u8 reserved[206];       /* 50 */
  65 } __attribute__ ((packed));
  66
  67 #endif                          /* LIB_SYS_VESA_H */