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Diffstat (limited to 'distrib/sdl-1.2.15/src/video/fbcon/3dfx_mmio.h')
| -rw-r--r-- | distrib/sdl-1.2.15/src/video/fbcon/3dfx_mmio.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/video/fbcon/3dfx_mmio.h b/distrib/sdl-1.2.15/src/video/fbcon/3dfx_mmio.h new file mode 100644 index 0000000..b641454 --- /dev/null +++ b/distrib/sdl-1.2.15/src/video/fbcon/3dfx_mmio.h @@ -0,0 +1,56 @@ +/* + 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 ); \ +} + |