| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| /* 3Dfx register definitions */ |
| |
| #include "3dfx_regs.h" |
| |
| /* 3Dfx control macros */ |
| |
| #define tdfx_in8(reg) *(volatile Uint8 *)(mapped_io + (reg)) |
| #define tdfx_in32(reg) *(volatile Uint32 *)(mapped_io + (reg)) |
| |
| #define tdfx_out8(reg,v) *(volatile Uint8 *)(mapped_io + (reg)) = v; |
| #define tdfx_out32(reg,v) *(volatile Uint32 *)(mapped_io + (reg)) = v; |
| |
| |
| /* Wait for fifo space */ |
| #define tdfx_wait(space) \ |
| { \ |
| while ( (tdfx_in8(TDFX_STATUS) & 0x1F) < space ) \ |
| ; \ |
| } |
| |
| |
| /* Wait for idle accelerator */ |
| #define tdfx_waitidle() \ |
| { \ |
| int i = 0; \ |
| \ |
| tdfx_wait(1); \ |
| tdfx_out32(COMMAND_3D, COMMAND_3D_NOP); \ |
| do { \ |
| i = (tdfx_in32(TDFX_STATUS) & STATUS_BUSY) ? 0 : i + 1; \ |
| } while ( i != 3 ); \ |
| } |
| |