headers/private/graphics/vesa/vesa.h

   1 /*
   2  * Copyright 2004-2009, Axel Dörfler, axeld@pinc-software.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef VESA_H
   6 #define VESA_H
   7
   8
   9 #include <SupportDefs.h>
  10
  11
  12 /* VBE info block structure */
  13
  14 #define VESA_SIGNATURE  'ASEV'
  15 #define VBE2_SIGNATURE  '2EBV'
  16
  17 struct vbe_info_block {
  18         // VBE 1.x fields
  19         uint32          signature;
  20         struct {
  21                 uint8   minor;
  22                 uint8   major;
  23         } version;
  24         uint32          oem_string;
  25         uint32          capabilities;
  26         uint32          mode_list;
  27         uint16          total_memory;   // in 64k blocks
  28         // VBE 2.0+ fields only
  29         // Note, the block is 256 bytes in size for VBE 1.x as well,
  30         // but doesn't define these fields. VBE 3 doesn't define
  31         // any additional fields.
  32         uint16          oem_software_revision;
  33         uint32          oem_vendor_name_string;
  34         uint32          oem_product_name_string;
  35         uint32          oem_product_revision_string;
  36         uint8           reserved[222];
  37         uint8           oem_data[256];
  38 } _PACKED;
  39
  40 // capabilities
  41 #define CAPABILITY_DAC_WIDTH                    0x01
  42 #define CAPABILITY_NOT_VGA_COMPATIBLE   0x02
  43
  44
  45 /* VBE mode info structure */
  46
  47 struct vbe_mode_info {
  48         uint16          attributes;
  49         uint8           window_a_attributes;
  50         uint8           window_b_attributes;
  51         uint16          window_granularity;
  52         uint16          window_size;
  53         uint16          window_a_segment;
  54         uint16          window_b_segment;
  55         uint32          window_function;        // real mode pointer
  56         uint16          bytes_per_row;
  57
  58         // VBE 1.2 and above
  59         uint16          width;
  60         uint16          height;
  61         uint8           char_width;
  62         uint8           char_height;
  63         uint8           num_planes;
  64         uint8           bits_per_pixel;
  65         uint8           num_banks;
  66         uint8           memory_model;
  67         uint8           bank_size;
  68         uint8           num_image_pages;
  69         uint8           _reserved0;
  70
  71         // direct color fields
  72         uint8           red_mask_size;
  73         uint8           red_field_position;
  74         uint8           green_mask_size;
  75         uint8           green_field_position;
  76         uint8           blue_mask_size;
  77         uint8           blue_field_position;
  78         uint8           reserved_mask_size;
  79         uint8           reserved_field_position;
  80         uint8           direct_color_mode_info;
  81
  82         // VBE 2.0 and above
  83         uint32          physical_base;
  84         uint32          _reserved1;
  85         uint16          _reserved2;
  86
  87         // VBE 3.0 and above
  88         uint16          linear_bytes_per_row;
  89         uint8           banked_num_image_pages;
  90         uint8           linear_num_image_pages;
  91
  92         uint8           linear_red_mask_size;
  93         uint8           linear_red_field_position;
  94         uint8           linear_green_mask_size;
  95         uint8           linear_green_field_position;
  96         uint8           linear_blue_mask_size;
  97         uint8           linear_blue_field_position;
  98         uint8           linear_reserved_mask_size;
  99         uint8           linear_reserved_field_position;
 100
 101         uint32          max_pixel_clock;                // in Hz
 102
 103         uint8           _reserved[189];
 104 } _PACKED;
 105
 106 // definitions of mode info attributes
 107 #define MODE_ATTR_AVAILABLE             1
 108 #define MODE_ATTR_COLOR_MODE    8
 109 #define MODE_ATTR_GRAPHICS_MODE 16
 110 #define MODE_ATTR_LINEAR_BUFFER 128
 111
 112 // memory models
 113 #define MODE_MEMORY_TEXT                        0
 114 #define MODE_MEMORY_PLANAR                      3
 115 #define MODE_MEMORY_PACKED_PIXEL        4
 116 #define MODE_MEMORY_DIRECT_COLOR        6
 117 #define MODE_MEMORY_YUV                         7
 118
 119 // set mode flags
 120 #define SET_MODE_MASK                           0x01ff
 121 #define SET_MODE_SPECIFY_CRTC           (1 << 11)
 122 #define SET_MODE_LINEAR_BUFFER          (1 << 14)
 123 #define SET_MODE_DONT_CLEAR_MEMORY      (1 << 15)
 124
 125
 126 /* CRTC info block structure */
 127
 128 struct crtc_info_block {
 129         uint16  horizontal_total;
 130         uint16  horizontal_sync_start;
 131         uint16  horizontal_sync_end;
 132         uint16  vertical_total;
 133         uint16  vertical_sync_start;
 134         uint16  vertical_sync_end;
 135         uint8   flags;
 136         uint32  pixel_clock;            // in Hz
 137         uint16  refresh_rate;           // in 0.01 Hz
 138
 139         uint8   _reserved[40];
 140 } _PACKED;
 141
 142 #define CRTC_DOUBLE_SCAN                0x01
 143 #define CRTC_INTERLACED                 0x02
 144 #define CRTC_NEGATIVE_HSYNC             0x04
 145 #define CRTC_NEGATIVE_VSYNC             0x08
 146
 147
 148 /* Power Management */
 149
 150 #define DPMS_ON                                 0x00
 151 #define DPMS_STANDBY                    0x01
 152 #define DPMS_SUSPEND                    0x02
 153 #define DPMS_OFF                                0x04
 154 #define DPMS_REDUCED_ON                 0x08
 155
 156
 157 /* VBE 3.0 protected mode interface
 158  * The BIOS area can be scanned for the protected mode
 159  * signature that identifies the structure below.
 160  */
 161
 162 #define VBE_PM_SIGNATURE 'DIMP'
 163
 164 struct vbe_protected_mode_info {
 165         uint32          signature;
 166         int16           entry_offset;
 167         int16           init_offset;
 168         uint16          data_selector;
 169         uint16          a000_selector;
 170         uint16          b000_selector;
 171         uint16          b800_selector;
 172         uint16          c000_selector;
 173         uint8           in_protected_mode;
 174         uint8           checksum;
 175 } _PACKED;
 176
 177 #endif  /* VESA_H */