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

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <freeldr.h>
  21
  22 #define NDEBUG
  23 #include <debug.h>
  24
  25 #include <pshpack2.h>
  26 typedef struct
  27 {
  28         UCHAR   Signature[4];                           // (ret) signature ("VESA")
  29                                                                         // (call) VESA 2.0 request signature ("VBE2"), required to receive
  30                                                                         // version 2.0 info
  31         USHORT  VesaVersion;                            // VESA version number (one-digit minor version -- 0102h = v1.2)
  32         ULONG OemNamePtr;                                       // pointer to OEM name
  33                                                                         // "761295520" for ATI
  34         ULONG   Capabilities;                           // capabilities flags (see #00078)
  35         ULONG   SupportedModeListPtr;           // pointer to list of supported VESA and OEM video modes
  36                                                                         // (list of words terminated with FFFFh)
  37         USHORT  TotalVideoMemory;                       // total amount of video memory in 64K blocks
  38
  39         // ---VBE v1.x ---
  40         //UCHAR Reserved[236];
  41
  42         // ---VBE v2.0 ---
  43         USHORT  OemSoftwareVersion;                     // OEM software version (BCD, high byte = major, low byte = minor)
  44         ULONG   VendorNamePtr;                          // pointer to vendor name
  45         ULONG   ProductNamePtr;                         // pointer to product name
  46         ULONG   ProductRevisionStringPtr;       // pointer to product revision string
  47         USHORT  VBE_AF_Version;                         // (if capabilities bit 3 set) VBE/AF version (BCD)
  48                                                                         // 0100h for v1.0P
  49         ULONG   AcceleratedModeListPtr;         // (if capabilities bit 3 set) pointer to list of supported
  50                                                                         // accelerated video modes (list of words terminated with FFFFh)
  51         UCHAR   Reserved[216];                          // reserved for VBE implementation
  52         UCHAR   ScratchPad[256];                        // OEM scratchpad (for OEM strings, etc.)
  53 } VESA_SVGA_INFO, *PVESA_SVGA_INFO;
  54 #include <poppack.h>
  55
  56 // Bitfields for VESA capabilities:
  57 //
  58 // Bit(s)  Description     (Table 00078)
  59 // 0      DAC can be switched into 8-bit mode
  60 // 1      non-VGA controller
  61 // 2      programmed DAC with blank bit (i.e. only during blanking interval)
  62 // 3      (VBE v3.0) controller supports hardware stereoscopic signalling
  63 // 3      controller supports VBE/AF v1.0P extensions
  64 // 4      (VBE v3.0) if bit 3 set:
  65 // =0 stereo signalling via external VESA stereo connector
  66 // =1 stereo signalling via VESA EVC connector
  67 // 4      (VBE/AF v1.0P) must call EnableDirectAccess to access framebuffer
  68 // 5      (VBE/AF v1.0P) controller supports hardware mouse cursor
  69 // 6      (VBE/AF v1.0P) controller supports hardware clipping
  70 // 7      (VBE/AF v1.0P) controller supports transparent BitBLT
  71 // 8-31   reserved (0)
  72
  73 // Notes: The list of supported video modes is stored in the reserved
  74 // portion of the SuperVGA information record by some implementations,
  75 // and it may thus be necessary to either copy the mode list or use a
  76 // different buffer for all subsequent VESA calls. Not all of the video
  77 // modes in the list of mode numbers may be supported, e.g. if they require
  78 // more memory than currently installed or are not supported by the
  79 // attached monitor. Check any mode you intend to use through AX=4F01h first..
  80 // The 1.1 VESA document specifies 242 reserved bytes at the end, so the
  81 // buffer should be 262 bytes to ensure that it is not overrun; for v2.0,
  82 // the buffer should be 512 bytes. The S3 specific video modes will most
  83 // likely follow the FFFFh terminator at the end of the standard modes.
  84 // A search must then be made to find them, FFFFh will also terminate this
  85 // second list. In some cases, only a "stub" VBE may be present, supporting
  86 // only AX=4F00h; this case may be assumed if the list of supported video modes
  87 // is empty (consisting of a single word of FFFFh)
  88 #if 0
  89 static VOID BiosSetVideoFont8x16(VOID)
  90 {
  91         REGS    Regs;
  92
  93         // Int 10h AX=1114h
  94         // VIDEO - TEXT-MODE CHARGEN - LOAD ROM 8x16 CHARACTER SET (VGA)
  95         //
  96         // AX = 1114h
  97         // BL = block to load
  98         // Return:
  99         // Nothing
 100         Regs.w.ax = 0x1114;
 101         Regs.b.bl = 0;
 102         Int386(0x10, &Regs, &Regs);
 103 }
 104
 105 static VOID VideoSetTextCursorPosition(ULONG X, ULONG Y)
 106 {
 107 }
 108
 109 static ULONG VideoGetTextCursorPositionX(VOID)
 110 {
 111         REGS    Regs;
 112
 113         // Int 10h AH=03h
 114         // VIDEO - GET CURSOR POSITION AND SIZE
 115         //
 116         // AH = 03h
 117         // BH = page number
 118         // 0-3 in modes 2&3
 119         // 0-7 in modes 0&1
 120         // 0 in graphics modes
 121         // Return:
 122         // AX = 0000h (Phoenix BIOS)
 123         // CH = start scan line
 124         // CL = end scan line
 125         // DH = row (00h is top)
 126         // DL = column (00h is left)
 127         Regs.b.ah = 0x03;
 128         Regs.b.bh = 0x00;
 129         Int386(0x10, &Regs, &Regs);
 130
 131         return Regs.b.dl;
 132 }
 133
 134 static ULONG VideoGetTextCursorPositionY(VOID)
 135 {
 136         REGS    Regs;
 137
 138         // Int 10h AH=03h
 139         // VIDEO - GET CURSOR POSITION AND SIZE
 140         //
 141         // AH = 03h
 142         // BH = page number
 143         // 0-3 in modes 2&3
 144         // 0-7 in modes 0&1
 145         // 0 in graphics modes
 146         // Return:
 147         // AX = 0000h (Phoenix BIOS)
 148         // CH = start scan line
 149         // CL = end scan line
 150         // DH = row (00h is top)
 151         // DL = column (00h is left)
 152         Regs.b.ah = 0x03;
 153         Regs.b.bh = 0x00;
 154         Int386(0x10, &Regs, &Regs);
 155
 156         return Regs.b.dh;
 157 }
 158 #endif
 159
 160 USHORT BiosIsVesaSupported(VOID)
 161 {
 162         REGS                    Regs;
 163         PVESA_SVGA_INFO SvgaInfo = (PVESA_SVGA_INFO)BIOSCALLBUFFER;
 164         //USHORT*                       VideoModes;
 165         //USHORT                        Index;
 166
 167         DPRINTM(DPRINT_UI, "BiosIsVesaSupported()\n");
 168
 169         RtlZeroMemory(SvgaInfo, sizeof(VESA_SVGA_INFO));
 170
 171         // Make sure we receive version 2.0 info
 172         SvgaInfo->Signature[0] = 'V';
 173         SvgaInfo->Signature[1] = 'B';
 174         SvgaInfo->Signature[2] = 'E';
 175         SvgaInfo->Signature[3] = '2';
 176
 177         // Int 10h AX=4F00h
 178         // VESA SuperVGA BIOS (VBE) - GET SuperVGA INFORMATION
 179         //
 180         // AX = 4F00h
 181         // ES:DI -> buffer for SuperVGA information (see #00077)
 182         // Return:
 183         // AL = 4Fh if function supported
 184         // AH = status
 185         //   00h successful
 186         // ES:DI buffer filled
 187         //   01h failed
 188         //   ---VBE v2.0---
 189         //   02h function not supported by current hardware configuration
 190         //   03h function invalid in current video mode
 191         //
 192         // Determine whether VESA BIOS extensions are present and the
 193         // capabilities supported by the display adapter
 194         //
 195         // Installation check;VESA SuperVGA
 196         Regs.w.ax = 0x4F00;
 197         Regs.w.es = BIOSCALLBUFSEGMENT;
 198         Regs.w.di = BIOSCALLBUFOFFSET;
 199         Int386(0x10, &Regs, &Regs);
 200
 201         DPRINTM(DPRINT_UI, "AL = 0x%x\n", Regs.b.al);
 202         DPRINTM(DPRINT_UI, "AH = 0x%x\n", Regs.b.ah);
 203
 204         if (Regs.w.ax != 0x004F)
 205         {
 206                 DPRINTM(DPRINT_UI, "Failed.\n");
 207                 return 0x0000;
 208         }
 209
 210         DPRINTM(DPRINT_UI, "Supported.\n");
 211         DPRINTM(DPRINT_UI, "SvgaInfo->Signature[4] = %c%c%c%c\n", SvgaInfo->Signature[0], SvgaInfo->Signature[1], SvgaInfo->Signature[2], SvgaInfo->Signature[3]);
 212         DPRINTM(DPRINT_UI, "SvgaInfo->VesaVersion = v%d.%d\n", ((SvgaInfo->VesaVersion >> 8) & 0xFF), (SvgaInfo->VesaVersion & 0xFF));
 213         DPRINTM(DPRINT_UI, "SvgaInfo->OemNamePtr = 0x%x\n", SvgaInfo->OemNamePtr);
 214         DPRINTM(DPRINT_UI, "SvgaInfo->Capabilities = 0x%x\n", SvgaInfo->Capabilities);
 215         DPRINTM(DPRINT_UI, "SvgaInfo->VideoMemory = %dK\n", SvgaInfo->TotalVideoMemory * 64);
 216         DPRINTM(DPRINT_UI, "---VBE v2.0 ---\n");
 217         DPRINTM(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));
 218         DPRINTM(DPRINT_UI, "SvgaInfo->VendorNamePtr = 0x%x\n", SvgaInfo->VendorNamePtr);
 219         DPRINTM(DPRINT_UI, "SvgaInfo->ProductNamePtr = 0x%x\n", SvgaInfo->ProductNamePtr);
 220         DPRINTM(DPRINT_UI, "SvgaInfo->ProductRevisionStringPtr = 0x%x\n", SvgaInfo->ProductRevisionStringPtr);
 221         DPRINTM(DPRINT_UI, "SvgaInfo->VBE/AF Version = 0x%x (BCD WORD)\n", SvgaInfo->VBE_AF_Version);
 222
 223         //DPRINTM(DPRINT_UI, "\nSupported VESA and OEM video modes:\n");
 224         //VideoModes = (USHORT*)SvgaInfo->SupportedModeListPtr;
 225         //for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
 226         //{
 227         //      DPRINTM(DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]);
 228         //}
 229
 230         //if (SvgaInfo->VesaVersion >= 0x0200)
 231         //{
 232         //      DPRINTM(DPRINT_UI, "\nSupported accelerated video modes (VESA v2.0):\n");
 233         //      VideoModes = (USHORT*)SvgaInfo->AcceleratedModeListPtr;
 234         //      for (Index=0; VideoModes[Index]!=0xFFFF; Index++)
 235         //      {
 236         //              DPRINTM(DPRINT_UI, "Mode %d: 0x%x\n", Index, VideoModes[Index]);
 237         //      }
 238         //}
 239
 240         return SvgaInfo->VesaVersion;
 241 }