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1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | /* 3Dfx register definitions */ |
25 | |
26 | #include "3dfx_regs.h" |
27 | |
28 | /* 3Dfx control macros */ |
29 | |
30 | #define tdfx_in8(reg) *(volatile Uint8 *)(mapped_io + (reg)) |
31 | #define tdfx_in32(reg) *(volatile Uint32 *)(mapped_io + (reg)) |
32 | |
33 | #define tdfx_out8(reg,v) *(volatile Uint8 *)(mapped_io + (reg)) = v; |
34 | #define tdfx_out32(reg,v) *(volatile Uint32 *)(mapped_io + (reg)) = v; |
35 | |
36 | |
37 | /* Wait for fifo space */ |
38 | #define tdfx_wait(space) \ |
39 | { \ |
40 | while ( (tdfx_in8(TDFX_STATUS) & 0x1F) < space ) \ |
41 | ; \ |
42 | } |
43 | |
44 | |
45 | /* Wait for idle accelerator */ |
46 | #define tdfx_waitidle() \ |
47 | { \ |
48 | int i = 0; \ |
49 | \ |
50 | tdfx_wait(1); \ |
51 | tdfx_out32(COMMAND_3D, COMMAND_3D_NOP); \ |
52 | do { \ |
53 | i = (tdfx_in32(TDFX_STATUS) & STATUS_BUSY) ? 0 : i + 1; \ |
54 | } while ( i != 3 ); \ |
55 | } |
56 | |