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comparison src/video/fbcon/3dfx_mmio.h @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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children e8157fcb3114
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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 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* 3Dfx register definitions */
29
30 #include "3dfx_regs.h"
31
32 /* 3Dfx control macros */
33
34 #define tdfx_in8(reg) *(volatile Uint8 *)(mapped_io + (reg))
35 #define tdfx_in32(reg) *(volatile Uint32 *)(mapped_io + (reg))
36
37 #define tdfx_out8(reg,v) *(volatile Uint8 *)(mapped_io + (reg)) = v;
38 #define tdfx_out32(reg,v) *(volatile Uint32 *)(mapped_io + (reg)) = v;
39
40
41 /* Wait for fifo space */
42 #define tdfx_wait(space) \
43 { \
44 while ( (tdfx_in8(TDFX_STATUS) & 0x1F) < space ) \
45 ; \
46 }
47
48
49 /* Wait for idle accelerator */
50 #define tdfx_waitidle() \
51 { \
52 int i = 0; \
53 \
54 tdfx_wait(1); \
55 tdfx_out32(COMMAND_3D, COMMAND_3D_NOP); \
56 do { \
57 i = (tdfx_in32(TDFX_STATUS) & STATUS_BUSY) ? 0 : i + 1; \
58 } while ( i != 3 ); \
59 }
60