3dfx_mmio.h

来自「minigui 1.6.10 8.1开源版」· C头文件 代码 · 共 41 行

/*
**  $Id: 3dfx_mmio.h 7352 2007-08-16 04:57:12Z xgwang $
**  
**  Copyright (C) 2003 ~ 2007 Feynman Software.
**  Copyright (C) 2001 ~ 2002 Wei Yongming.
*/

/* 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 );						\
}