reactos/boot/freeldr/freeldr/arch/i386/i386vid.c

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
   4  *  Portions from Linux video.S - Display adapter & video mode setup, version 2.13 (14-May-99)
   5  *  Copyright (C) 1995 -- 1999 Martin Mares <mj@ucw.cz>
   6  *  Based on the original setup.S code (C) Linus Torvalds and Mats Anderson
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23
  24 #include <freeldr.h>
  25 #include <arch.h>
  26 #include <video.h>
  27 #include <portio.h>
  28 #include <rtl.h>
  29 #include <debug.h>
  30
  31 typedef struct
  32 {
  33         U8      Signature[4];                           // (ret) signature ("VESA")
  34                                                                         // (call) VESA 2.0 request signature ("VBE2"), required to receive
  35                                                                         // version 2.0 info
  36         U16     VesaVersion;                            // VESA version number (one-digit minor version -- 0102h = v1.2)
  37         U32 OemNamePtr;                                 // pointer to OEM name
  38                                                                         // "761295520" for ATI
  39         U32     Capabilities;                           // capabilities flags (see #00078)
  40         U32     SupportedModeListPtr;           // pointer to list of supported VESA and OEM video modes
  41                                                                         // (list of words terminated with FFFFh)
  42         U16     TotalVideoMemory;                       // total amount of video memory in 64K blocks
  43
  44         // ---VBE v1.x ---
  45         //U8    Reserved[236];
  46
  47         // ---VBE v2.0 ---
  48         U16     OemSoftwareVersion;                     // OEM software version (BCD, high byte = major, low byte = minor)
  49         U32     VendorNamePtr;                          // pointer to vendor name
  50         U32     ProductNamePtr;                         // pointer to product name
  51         U32     ProductRevisionStringPtr;       // pointer to product revision string
  52         U16     VBE_AF_Version;                         // (if capabilities bit 3 set) VBE/AF version (BCD)
  53                                                                         // 0100h for v1.0P
  54         U32     AcceleratedModeListPtr;         // (if capabilities bit 3 set) pointer to list of supported
  55                                                                         // accelerated video modes (list of words terminated with FFFFh)
  56         U8      Reserved[216];                          // reserved for VBE implementation
  57         U8      ScratchPad[256];                        // OEM scratchpad (for OEM strings, etc.)
  58 } PACKED VESA_SVGA_INFO, *PVESA_SVGA_INFO;
  59
  60 // Bitfields for VESA capabilities:
  61 //
  62 // Bit(s)  Description     (Table 00078)
  63 // 0      DAC can be switched into 8-bit mode
  64 // 1      non-VGA controller
  65 // 2      programmed DAC with blank bit (i.e. only during blanking interval)
  66 // 3      (VBE v3.0) controller supports hardware stereoscopic signalling
  67 // 3      controller supports VBE/AF v1.0P extensions
  68 // 4      (VBE v3.0) if bit 3 set:
  69 // =0 stereo signalling via external VESA stereo connector
  70 // =1 stereo signalling via VESA EVC connector
  71 // 4      (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
  72 // 5      (VBE/AF v1.0P) controller supports hardware mouse cursor
  73 // 6      (VBE/AF v1.0P) controller supports hardware clipping
  74 // 7      (VBE/AF v1.0P) controller supports transparent BitBLT
  75 // 8-31   reserved (0)
  76
  77 // Notes: The list of supported video modes is stored in the reserved
  78 // portion of the SuperVGA information record by some implementations,
  79 // and it may thus be necessary to either copy the mode list or use a
  80 // different buffer for all subsequent VESA calls. Not all of the video
  81 // modes in the list of mode numbers may be supported, e.g. if they require
  82 // more memory than currently installed or are not supported by the
  83 // attached monitor. Check any mode you intend to use through AX=4F01h first..
  84 // The 1.1 VESA document specifies 242 reserved bytes at the end, so the
  85 // buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
  86 // the buffer should be 512 bytes. The S3 specific video modes will most
  87 // likely follow the FFFFh terminator at the end of the standard modes.
  88 // A search must then be made to find them, FFFFh will also terminate this
  89 // second list. In some cases, only a "stub" VBE may be present, supporting
  90 // only AX=4F00h; this case may be assumed if the list of supported video modes
  91 // is empty (consisting of a single word of FFFFh)
  92
  93 VOID BiosSetVideoFont8x16(VOID)
  94 {
  95         REGS    Regs;
  96
  97         // Int 10h AX=1114h
  98         // VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
  99         //
 100         // AX = 1114h
 101         // BL = block to load
 102         // Return:
 103         // Nothing
 104         Regs.w.ax = 0x1114;
 105         Regs.b.bl = 0;
 106         Int386(0x10, &Regs, &Regs);
 107 }
 108
 109 VOID VideoSetTextCursorPosition(U32 X, U32 Y)
 110 {
 111 }
 112
 113 U32 VideoGetTextCursorPositionX(VOID)
 114 {
 115         REGS    Regs;
 116
 117         // Int 10h AH=03h
 118         // VIDEO - GET CURSOR POSITION AND SIZE
 119         //
 120         // AH = 03h
 121         // BH = page number
 122         // 0-3 in modes 2&3
 123         // 0-7 in modes 0&1
 124         // 0 in graphics modes
 125         // Return:
 126         // AX = 0000h (Phoenix BIOS)
 127         // CH = start scan line
 128         // CL = end scan line
 129         // DH = row (00h is top)
 130         // DL = column (00h is left)
 131         Regs.b.ah = 0x03;
 132         Regs.b.bh = 0x00;
 133         Int386(0x10, &Regs, &Regs);
 134
 135         return Regs.b.dl;
 136 }
 137
 138 U32 VideoGetTextCursorPositionY(VOID)
 139 {
 140         REGS    Regs;
 141
 142         // Int 10h AH=03h
 143         // VIDEO - GET CURSOR POSITION AND SIZE
 144         //
 145         // AH = 03h
 146         // BH = page number
 147         // 0-3 in modes 2&3
 148         // 0-7 in modes 0&1
 149         // 0 in graphics modes
 150         // Return:
 151         // AX = 0000h (Phoenix BIOS)
 152         // CH = start scan line
 153         // CL = end scan line
 154         // DH = row (00h is top)
 155         // DL = column (00h is left)
 156         Regs.b.ah = 0x03;
 157         Regs.b.bh = 0x00;
 158         Int386(0x10, &Regs, &Regs);
 159
 160         return Regs.b.dh;
 161 }
 162
 163 U16 BiosIsVesaSupported(VOID)
 164 {
 165         REGS                    Regs;
 166         PVESA_SVGA_INFO SvgaInfo = (PVESA_SVGA_INFO)BIOSCALLBUFFER;
 167 #ifdef DEBUG
 168         //U16*                  VideoModes;
 169         //U16                   Index;
 170 #endif // defined DEBUG
 171
 172         DbgPrint((DPRINT_UI, "BiosIsVesaSupported()\n"));
 173
 174         RtlZeroMemory(SvgaInfo, sizeof(VESA_SVGA_INFO));
 175
 176         // Make sure we receive version 2.0 info
 177         SvgaInfo->Signature[0] = 'V';
 178         SvgaInfo->Signature[1] = 'B';
 179         SvgaInfo->Signature[2] = 'E';
 180         SvgaInfo->Signature[3] = '2';
 181
 182         // Int 10h AX=4F00h
 183         // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
 184         //
 185         // AX = 4F00h
 186         // ES:DI -> buffer for SuperVGA information (see #00077)
 187         // Return:
 188         // AL = 4Fh if function supported
 189         // AH = status
 190         //   00h successful
 191         // ES:DI buffer filled
 192         //   01h failed
 193         //   ---VBE v2.0---
 194         //   02h function not supported by current hardware configuration
 195         //   03h function invalid in current video mode
 196         //
 197         // Determine whether VESA BIOS extensions are present and the
 198         // capabilities supported by the display adapter
 199         //
 200         // Installation check;VESA SuperVGA
 201         Regs.w.ax = 0x4F00;
 202         Regs.w.es = BIOSCALLBUFSEGMENT;
 203         Regs.w.di = BIOSCALLBUFOFFSET;
 204         Int386(0x10, &Regs, &Regs);
 205
 206         DbgPrint((DPRINT_UI, "AL = 0x%x\n", Regs.b.al));
 207         DbgPrint((DPRINT_UI, "AH = 0x%x\n", Regs.b.ah));
 208
 209         if (Regs.w.ax != 0x004F)
 210         {
 211                 DbgPrint((DPRINT_UI, "Failed.\n"));
 212                 return 0x0000;
 213         }
 214
 215 #ifdef DEBUG
 216         DbgPrint((DPRINT_UI, "Supported.\n"));
 217         DbgPrint((DPRINT_UI, "SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo->Signature[0], SvgaInfo->Signature[1], SvgaInfo->Signature[2], SvgaInfo->Signature[3]));
 218         DbgPrint((DPRINT_UI, "SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo->VesaVersion >> 8) & 0xFF), (SvgaInfo->VesaVersion & 0xFF)));
 219         DbgPrint((DPRINT_UI, "SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo->OemNamePtr));
 220         DbgPrint((DPRINT_UI, "SvgaInfo->Capabilities = 0x%x\n", SvgaInfo->Capabilities));
 221         DbgPrint((DPRINT_UI, "SvgaInfo->VideoMemory = %dK\n", SvgaInfo->TotalVideoMemory * 64));
 222         DbgPrint((DPRINT_UI, "---VBE v2.0 ---\n"));
 223         DbgPrint((DPRINT_UI, "SvgaInfo->OemSoftwareVersion = v%d.%d\n", ((SvgaInfo->OemSoftwareVersion >> 8) & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 12) & 0x0F) * 10), (SvgaInfo->OemSoftwareVersion & 0x0F) + (((SvgaInfo->OemSoftwareVersion >> 4) & 0x0F) * 10)));
 224         DbgPrint((DPRINT_UI, "SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo->VendorNamePtr));
 225         DbgPrint((DPRINT_UI, "SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo->ProductNamePtr));
 226         DbgPrint((DPRINT_UI, "SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo->ProductRevisionStringPtr));
 227         DbgPrint((DPRINT_UI, "SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo->VBE_AF_Version));
 228
 229         //DbgPrint((DPRINT_UI, "\nSupported VESA and OEM video modes:\n"));
 230         //VideoModes = (U16*)SvgaInfo->SupportedModeListPtr;
 231         //for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
 232         //{
 233         //      DbgPrint((DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]));
 234         //}
 235
 236         //if (SvgaInfo->VesaVersion >= 0x0200)
 237         //{
 238         //      DbgPrint((DPRINT_UI, "\nSupported accelerated video modes (VESA v2.0):\n"));
 239         //      VideoModes = (U16*)SvgaInfo->AcceleratedModeListPtr;
 240         //      for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
 241         //      {
 242         //              DbgPrint((DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]));
 243         //      }
 244         //}
 245
 246         DbgPrint((DPRINT_UI, "\n"));
 247         //getch();
 248 #endif // defined DEBUG
 249
 250         return SvgaInfo->VesaVersion;
 251 }