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