1/*
2    SDL - Simple DirectMedia Layer
3    Copyright (C) 1997-2012 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
52