1 /*

     2     SDL - Simple DirectMedia Layer

     3     Copyright (C) 1997-2006 Sam Lantinga

     4 

     5     This library is free software; you can redistribute it and/or

     6     modify it under the terms of the GNU Lesser General Public

     7     License as published by the Free Software Foundation; either

     8     version 2.1 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     Lesser General Public License for more details.

    14 

    15     You should have received a copy of the GNU Lesser General Public

    16     License along with this library; if not, write to the Free Software

    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    18 

    19     Sam Lantinga

    20     slouken@libsdl.org

    21 */

    22 #include "SDL_config.h"

    23 

    24 /* MGA register definitions */

    25 

    26 #include "matrox_regs.h"

    27 

    28 /* MGA control macros */

    29 

    30 #define mga_in8(reg)		*(volatile Uint8  *)(mapped_io + (reg))

    31 #define mga_in32(reg)		*(volatile Uint32 *)(mapped_io + (reg))

    32 

    33 #define mga_out8(reg,v)		*(volatile Uint8  *)(mapped_io + (reg)) = v;

    34 #define mga_out32(reg,v)	*(volatile Uint32 *)(mapped_io + (reg)) = v;

    35 

    36 

    37 /* Wait for fifo space */

    38 #define mga_wait(space)							\

    39 {									\

    40 	while ( mga_in8(MGAREG_FIFOSTATUS) < space )			\

    41 		;							\

    42 }

    43 

    44 

    45 /* Wait for idle accelerator */

    46 #define mga_waitidle()							\

    47 {									\

    48 	while ( mga_in32(MGAREG_STATUS) & 0x10000 )			\

    49 		;							\

    50 }

    51