boot/freeldr/freeldr/arch/i386/xboxvideo.c

   1 /*
   2  *  FreeLoader
   3  *
   4  *  This program is free software; you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation; either version 2 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  *
  18  * Note: much of this code was based on knowledge and/or code developed
  19  * by the Xbox Linux group: http://www.xbox-linux.org
  20  */
  21
  22 #include <freeldr.h>
  23 #include <debug.h>
  24
  25 DBG_DEFAULT_CHANNEL(UI);
  26
  27 PVOID FrameBuffer;
  28 ULONG FrameBufferSize;
  29 static ULONG ScreenWidth;
  30 static ULONG ScreenHeight;
  31 static ULONG BytesPerPixel;
  32 static ULONG Delta;
  33
  34 #define CHAR_WIDTH  8
  35 #define CHAR_HEIGHT 16
  36
  37 #define TOP_BOTTOM_LINES 0
  38
  39 #define FB_SIZE_MB 4
  40
  41 #define MAKE_COLOR(Red, Green, Blue) (0xff000000 | (((Red) & 0xff) << 16) | (((Green) & 0xff) << 8) | ((Blue) & 0xff))
  42
  43 static VOID
  44 XboxVideoOutputChar(UCHAR Char, unsigned X, unsigned Y, ULONG FgColor, ULONG BgColor)
  45 {
  46   PUCHAR FontPtr;
  47   PULONG Pixel;
  48   UCHAR Mask;
  49   unsigned Line;
  50   unsigned Col;
  51
  52   FontPtr = XboxFont8x16 + Char * 16;
  53   Pixel = (PULONG) ((char *) FrameBuffer + (Y * CHAR_HEIGHT + TOP_BOTTOM_LINES) * Delta
  54                   + X * CHAR_WIDTH * BytesPerPixel);
  55   for (Line = 0; Line < CHAR_HEIGHT; Line++)
  56     {
  57       Mask = 0x80;
  58       for (Col = 0; Col < CHAR_WIDTH; Col++)
  59         {
  60           Pixel[Col] = (0 != (FontPtr[Line] & Mask) ? FgColor : BgColor);
  61           Mask = Mask >> 1;
  62         }
  63       Pixel = (PULONG) ((char *) Pixel + Delta);
  64     }
  65 }
  66
  67 static ULONG
  68 XboxVideoAttrToSingleColor(UCHAR Attr)
  69 {
  70   UCHAR Intensity;
  71
  72   Intensity = (0 == (Attr & 0x08) ? 127 : 255);
  73
  74   return 0xff000000 |
  75          (0 == (Attr & 0x04) ? 0 : (Intensity << 16)) |
  76          (0 == (Attr & 0x02) ? 0 : (Intensity << 8)) |
  77          (0 == (Attr & 0x01) ? 0 : Intensity);
  78 }
  79
  80 static VOID
  81 XboxVideoAttrToColors(UCHAR Attr, ULONG *FgColor, ULONG *BgColor)
  82 {
  83   *FgColor = XboxVideoAttrToSingleColor(Attr & 0xf);
  84   *BgColor = XboxVideoAttrToSingleColor((Attr >> 4) & 0xf);
  85 }
  86
  87 static VOID
  88 XboxVideoClearScreenColor(ULONG Color, BOOLEAN FullScreen)
  89 {
  90   ULONG Line, Col;
  91   PULONG p;
  92
  93   for (Line = 0; Line < ScreenHeight - (FullScreen ? 0 : 2 * TOP_BOTTOM_LINES); Line++)
  94     {
  95       p = (PULONG) ((char *) FrameBuffer + (Line + (FullScreen ? 0 : TOP_BOTTOM_LINES)) * Delta);
  96       for (Col = 0; Col < ScreenWidth; Col++)
  97         {
  98           *p++ = Color;
  99         }
 100     }
 101 }
 102
 103 VOID
 104 XboxVideoClearScreen(UCHAR Attr)
 105 {
 106   ULONG FgColor, BgColor;
 107
 108   XboxVideoAttrToColors(Attr, &FgColor, &BgColor);
 109
 110   XboxVideoClearScreenColor(BgColor, FALSE);
 111 }
 112
 113 VOID
 114 XboxVideoPutChar(int Ch, UCHAR Attr, unsigned X, unsigned Y)
 115 {
 116   ULONG FgColor, BgColor;
 117
 118   XboxVideoAttrToColors(Attr, &FgColor, &BgColor);
 119
 120   XboxVideoOutputChar(Ch, X, Y, FgColor, BgColor);
 121 }
 122
 123 UCHAR
 124 NvGetCrtc(UCHAR Index)
 125 {
 126     *((PUCHAR) NV2A_CRTC_REGISTER_INDEX) = Index;
 127     return *((PUCHAR) NV2A_CRTC_REGISTER_VALUE);
 128 }
 129
 130 VOID
 131 XboxVideoInit(VOID)
 132 {
 133   /* Reuse framebuffer that was set up by firmware */
 134   FrameBuffer = (PVOID)*((PULONG) NV2A_CRTC_FRAMEBUFFER_START);
 135   /* Verify that framebuffer address is page-aligned */
 136   ASSERT((ULONG_PTR)FrameBuffer % PAGE_SIZE == 0);
 137
 138   /* FIXME: obtain fb size from firmware somehow (Cromwell reserves high 4 MB of RAM) */
 139   FrameBufferSize = 4 * 1024 * 1024;
 140
 141   ScreenWidth = *((PULONG) NV2A_RAMDAC_FP_HVALID_END) + 1;
 142   ScreenHeight = *((PULONG) NV2A_RAMDAC_FP_VVALID_END) + 1;
 143   /* Get BPP directly from NV2A CRTC (magic constants are from Cromwell) */
 144   BytesPerPixel = 8 * (((NvGetCrtc(0x19) & 0xE0) << 3) | (NvGetCrtc(0x13) & 0xFF)) / ScreenWidth;
 145   if (BytesPerPixel == 4)
 146   {
 147     ASSERT((NvGetCrtc(0x28) & 0xF) == BytesPerPixel - 1);
 148   }
 149   else
 150   {
 151     ASSERT((NvGetCrtc(0x28) & 0xF) == BytesPerPixel);
 152   }
 153   Delta = (ScreenWidth * BytesPerPixel + 3) & ~ 0x3;
 154
 155   /* Verify screen resolution */
 156   ASSERT(ScreenWidth > 1);
 157   ASSERT(ScreenHeight > 1);
 158   ASSERT(BytesPerPixel >= 1 && BytesPerPixel <= 4);
 159   /* Verify that screen fits framebuffer size */
 160   ASSERT(ScreenWidth * ScreenHeight * BytesPerPixel <= FrameBufferSize);
 161
 162   XboxVideoClearScreenColor(MAKE_COLOR(0, 0, 0), TRUE);
 163 }
 164
 165 VIDEODISPLAYMODE
 166 XboxVideoSetDisplayMode(char *DisplayMode, BOOLEAN Init)
 167 {
 168   /* We only have one mode, semi-text */
 169   return VideoTextMode;
 170 }
 171
 172 VOID
 173 XboxVideoGetDisplaySize(PULONG Width, PULONG Height, PULONG Depth)
 174 {
 175   *Width = ScreenWidth / CHAR_WIDTH;
 176   *Height = (ScreenHeight - 2 * TOP_BOTTOM_LINES) / CHAR_HEIGHT;
 177   *Depth = 0;
 178 }
 179
 180 ULONG
 181 XboxVideoGetBufferSize(VOID)
 182 {
 183   return (ScreenHeight - 2 * TOP_BOTTOM_LINES) / CHAR_HEIGHT * (ScreenWidth / CHAR_WIDTH) * 2;
 184 }
 185
 186 VOID
 187 XboxVideoGetFontsFromFirmware(PULONG RomFontPointers)
 188 {
 189     TRACE("XboxVideoGetFontsFromFirmware(): UNIMPLEMENTED\n");
 190 }
 191
 192 VOID
 193 XboxVideoSetTextCursorPosition(UCHAR X, UCHAR Y)
 194 {
 195   /* We don't have a cursor yet */
 196 }
 197
 198 VOID
 199 XboxVideoHideShowTextCursor(BOOLEAN Show)
 200 {
 201   /* We don't have a cursor yet */
 202 }
 203
 204 VOID
 205 XboxVideoCopyOffScreenBufferToVRAM(PVOID Buffer)
 206 {
 207   PUCHAR OffScreenBuffer = (PUCHAR) Buffer;
 208   ULONG Col, Line;
 209
 210   for (Line = 0; Line < (ScreenHeight - 2 * TOP_BOTTOM_LINES) / CHAR_HEIGHT; Line++)
 211     {
 212       for (Col = 0; Col < ScreenWidth / CHAR_WIDTH; Col++)
 213         {
 214           XboxVideoPutChar(OffScreenBuffer[0], OffScreenBuffer[1], Col, Line);
 215           OffScreenBuffer += 2;
 216         }
 217     }
 218 }
 219
 220 BOOLEAN
 221 XboxVideoIsPaletteFixed(VOID)
 222 {
 223   return FALSE;
 224 }
 225
 226 VOID
 227 XboxVideoSetPaletteColor(UCHAR Color, UCHAR Red, UCHAR Green, UCHAR Blue)
 228 {
 229   /* Not supported */
 230 }
 231
 232 VOID
 233 XboxVideoGetPaletteColor(UCHAR Color, UCHAR* Red, UCHAR* Green, UCHAR* Blue)
 234 {
 235   /* Not supported */
 236 }
 237
 238 VOID
 239 XboxVideoSync(VOID)
 240 {
 241   /* Not supported */
 242 }
 243
 244 VOID
 245 XboxBeep(VOID)
 246 {
 247     /* Call PC version */
 248     PcBeep();
 249 }
 250
 251 VOID
 252 XboxVideoPrepareForReactOS(VOID)
 253 {
 254     XboxVideoClearScreenColor(MAKE_COLOR(0, 0, 0), TRUE);
 255     XboxVideoHideShowTextCursor(FALSE);
 256 }
 257
 258 /* EOF */