/***  $Id: 3dfx_mmio.h,v 1.3 2003/09/04 06:02:53 weiym Exp $**  **  Port to MiniGUI by Wei Yongming (2001/10/03).**  Copyright (C) 2001 ~ 2002 Wei Yongming.**  Copyright (C) 2003 Feynman Software.****  SDL - Simple DirectMedia Layer**  Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga*//*** This program is free software; you can redistribute it and/or modify** it under the terms of the GNU General Public License as published by** the Free Software Foundation; either version 2 of the License, or** (at your option) any later version.**** This program 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 General Public License for more details.**** You should have received a copy of the GNU General Public License** along with this program; if not, write to the Free Software** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA*//* 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 );						\}