com32/include/hw/vga.h

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2012 Intel Corporation; author: H. Peter Anvin
   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 _HW_VGA_H
  29 #define _HW_VGA_H 1
  30
  31 #include <sys/io.h>
  32
  33 /* These are relative to the CRTC base address */
  34 #define VGA_CRTC_ADDR                   0x4
  35 #define VGA_CRTC_DATA                   0x5
  36 #define VGA_CRTC_IX_HORIZ_TOTAL         0x00
  37 #define VGA_CRTC_IX_END_HORIZ_DISPLAY   0x01
  38 #define VGA_CRTC_IX_START_HORIZ_BLANK   0x02
  39 #define VGA_CRTC_IX_END_HORIZ_BLANK     0x03
  40 #define VGA_CRTC_IX_START_HORIZ_RETR    0x04
  41 #define VGA_CRTC_IX_END_HORIZ_RETR      0x05
  42 #define VGA_CRTC_IX_VERT_TOTAL          0x06
  43 #define VGA_CRTC_IX_OVERFLOW            0x07
  44 #define VGA_CRTC_IX_PRESET_ROW_SCAN     0x08
  45 #define VGA_CRTC_IX_MAX_SCAN_LINE       0x09
  46 #define VGA_CRTC_IX_CURSOR_START        0x0a
  47 #define VGA_CRTC_IX_CURSOR_END          0x0b
  48 #define VGA_CRTC_IX_START_ADDR_HIGH     0x0c
  49 #define VGA_CRTC_IX_START_ADDR_LOW      0x0d
  50 #define VGA_CRTC_IX_CURSOR_POS_HIGH     0x0e
  51 #define VGA_CRTC_IX_CURSOR_POS_LOW      0x0f
  52 #define VGA_CRTC_IX_START_VERT_RETR     0x10
  53 #define VGA_CRTC_IX_END_VERT_RETR       0x11
  54 #define VGA_CRTC_IX_END_VERT_DISPLAY    0x12
  55 #define VGA_CRTC_IX_OFFSET              0x13
  56 #define VGA_CRTC_IX_UNDERLINE           0x14
  57 #define VGA_CRTC_IX_START_VERT_BLANK    0x15
  58 #define VGA_CRTC_IX_END_VERT_BLANK      0x16
  59 #define VGA_CRTC_IX_MODE_CONTROL        0x17
  60 #define VGA_CRTC_IX_LINE_COMPARE        0x18
  61 #define VGA_CRTC_INPUT_STATUS_1         0xa
  62 #define VGA_CRTC_FEATURE_CONTROL_WRITE  0xa
  63
  64 #define VGA_ATTR_ADDR_DATA              0x3c0
  65 #define VGA_ATTR_DATA_READ              0x3c1
  66 /* 0x00-0x0f are 16->64 palette registers */
  67 #define VGA_ATTR_IX_MODE_CONTROL        0x10
  68 #define VGA_ATTR_IX_OVERSCAN            0x11
  69 #define VGA_ATTR_IX_COLOR_PLANE_ENABLE  0x12
  70 #define VGA_ATTR_IX_HORIZ_PIXEL_PAN     0x13
  71 #define VGA_ADDR_IX_COLOR_SELECT        0x14
  72 #define VGA_INPUT_STATUS_0              0x3c2
  73 #define VGA_MISC_OUTPUT_WRITE           0x3c2
  74 #define VGA_SEQ_ADDR                    0x3c4
  75 #define VGA_SEQ_DATA                    0x3c5
  76 #define VGA_SEQ_IX_RESET                0
  77 #define VGA_SEQ_IX_CLOCKMODE            1
  78 #define VGA_SEQ_IX_MAP_MASK             2
  79 #define VGA_SEQ_IX_CHAR_MAP             3
  80 #define VGA_SEQ_IX_SEQ_MEM_MODE         4
  81 #define VGA_DAC_STATE                   0x3c7
  82 #define VGA_DAC_ADDR_READ_MODE          0x3c7
  83 #define VGA_DAC_ADDR_WRITE_MODE         0x3c8
  84 #define VGA_DAC_DATA                    0x3c9
  85 #define VGA_FEATURE_CONTROL_READ        0x3ca
  86 #define VGA_MISC_OUTPUT_READ            0x3cc
  87 #define VGA_GC_ADDR                     0x3ce
  88 #define VGA_GC_DATA                     0x3cf
  89 #define VGA_GC_IX_SET_RESET             0
  90 #define VGA_GC_IX_ENABLE_SET_RESET      1
  91 #define VGA_GC_IX_COLOR_COMPARE         2
  92 #define VGA_GC_IX_DATA_ROTATE           3
  93 #define VGA_GC_IX_READ_MAP_SELECT       4
  94 #define VGA_GC_IX_GRAPHICS_MODE         5
  95 #define VGA_GC_IX_MISC_GRAPHICS         6
  96 #define VGA_GC_IX_COLOR_DONT_CARE       7
  97 #define VGA_GC_IX_BIT_MASK              8
  98
  99 static inline uint16_t vga_crtc_base(void)
 100 {
 101     return 0x3b0 + ((inb(VGA_MISC_OUTPUT_READ) & 1) << 5);
 102 }
 103
 104 #endif /* _HW_VGA_H */