com32/mboot/vesa.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 1999-2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   Permission is hereby granted, free of charge, to any person
   6  *   obtaining a copy of this software and associated documentation
   7  *   files (the "Software"), to deal in the Software without
   8  *   restriction, including without limitation the rights to use,
   9  *   copy, modify, merge, publish, distribute, sublicense, and/or
  10  *   sell copies of the Software, and to permit persons to whom
  11  *   the Software is furnished to do so, subject to the following
  12  *   conditions:
  13  *
  14  *   The above copyright notice and this permission notice shall
  15  *   be included in all copies or substantial portions of the Software.
  16  *
  17  *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  19  *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  20  *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  21  *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  23  *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  *   OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  * ----------------------------------------------------------------------- */
  27
  28 #ifndef LIB_SYS_VESA_H
  29 #define LIB_SYS_VESA_H
  30
  31 #include <inttypes.h>
  32 #include <com32.h>
  33
  34 /* VESA General Information table */
  35 struct vesa_general_info {
  36     uint32_t signature;         /* Magic number = "VESA" */
  37     uint16_t version;
  38     far_ptr_t vendor_string;
  39     uint8_t capabilities[4];
  40     far_ptr_t video_mode_ptr;
  41     uint16_t total_memory;
  42
  43     uint16_t oem_software_rev;
  44     far_ptr_t oem_vendor_name_ptr;
  45     far_ptr_t oem_product_name_ptr;
  46     far_ptr_t oem_product_rev_ptr;
  47
  48     uint8_t reserved[222];
  49     uint8_t oem_data[256];
  50 } __attribute__ ((packed));
  51
  52 #define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))
  53 #define VBE2_MAGIC ('V' + ('B' << 8) + ('E' << 16) + ('2' << 24))
  54
  55 struct vesa_mode_info {
  56     uint16_t mode_attr;
  57     uint8_t win_attr[2];
  58     uint16_t win_grain;
  59     uint16_t win_size;
  60     uint16_t win_seg[2];
  61     far_ptr_t win_scheme;
  62     uint16_t logical_scan;
  63
  64     uint16_t h_res;
  65     uint16_t v_res;
  66     uint8_t char_width;
  67     uint8_t char_height;
  68     uint8_t memory_planes;
  69     uint8_t bpp;
  70     uint8_t banks;
  71     uint8_t memory_layout;
  72     uint8_t bank_size;
  73     uint8_t image_pages;
  74     uint8_t page_function;
  75
  76     uint8_t rmask;
  77     uint8_t rpos;
  78     uint8_t gmask;
  79     uint8_t gpos;
  80     uint8_t bmask;
  81     uint8_t bpos;
  82     uint8_t resv_mask;
  83     uint8_t resv_pos;
  84     uint8_t dcm_info;
  85
  86     uint8_t *lfb_ptr;           /* Linear frame buffer address */
  87     uint8_t *offscreen_ptr;     /* Offscreen memory address */
  88     uint16_t offscreen_size;
  89
  90     uint8_t reserved[206];
  91 } __attribute__ ((packed));
  92
  93 struct vesa_info {
  94     struct vesa_general_info gi;
  95     struct vesa_mode_info mi;
  96 };
  97
  98 extern struct vesa_info vesa_info;
  99
 100 #endif /* LIB_SYS_VESA_H */