FUNCTIONS

1. mga_in8
2. mga_in32
3. mga_out8
4. mga_out32
5. mga_wait
6. mga_waitidle

   1 /*
   2     SDL - Simple DirectMedia Layer
   3     Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
   4 
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9 
  10     This library 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 GNU
  13     Library General Public License for more details.
  14 
  15     You should have received a copy of the GNU Library General Public
  16     License along with this library; if not, write to the Free
  17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18 
  19     Sam Lantinga
  20     slouken@devolution.com
  21 */
  23 #ifdef SAVE_RCSID
  24 static char rcsid =
  25  "@(#) $Id: matrox_mmio.h,v 1.2.2.2 2001/02/10 07:20:06 hercules Exp $";
  26 #endif
  28 /* MGA register definitions */
  30 #include "matrox_regs.h"
  32 /* MGA control macros */
  34 #define mga_in8(reg)            *(volatile Uint8  *)(mapped_io + (reg))
     /* [<][>][^][v][top][bottom][index][help] */
  35 #define mga_in32(reg)           *(volatile Uint32 *)(mapped_io + (reg))
     /* [<][>][^][v][top][bottom][index][help] */
  37 #define mga_out8(reg,v)         *(volatile Uint8  *)(mapped_io + (reg)) = v;
     /* [<][>][^][v][top][bottom][index][help] */
  38 #define mga_out32(reg,v)        *(volatile Uint32 *)(mapped_io + (reg)) = v;
     /* [<][>][^][v][top][bottom][index][help] */
  41 /* Wait for fifo space */
  42 #define mga_wait(space)                                                 \
     /* [<][>][^][v][top][bottom][index][help] */
  43 {                                                                       \
  44         while ( mga_in8(MGAREG_FIFOSTATUS) < space )                    \
  45                 ;                                                       \
  46 }
  49 /* Wait for idle accelerator */
  50 #define mga_waitidle()                                                  \
     /* [<][>][^][v][top][bottom][index][help] */
  51 {                                                                       \
  52         while ( mga_in32(MGAREG_STATUS) & 0x10000 )                     \
  53                 ;                                                       \
  54 }