src/video/fbcon/3dfx_mmio.h
author Edgar Simo <bobbens@gmail.com>
Mon, 04 Aug 2008 11:30:16 +0000
branchgsoc2008_force_feedback
changeset 2582 9f0f0a532343
parent 1895 c121d94672cb
child 2859 99210400e8b9
permissions -rw-r--r--
Fixed warning.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2006 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* 3Dfx register definitions */
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#include "3dfx_regs.h"
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/* 3Dfx control macros */
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#define tdfx_in8(reg)		*(volatile Uint8  *)(mapped_io + (reg))
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#define tdfx_in32(reg)		*(volatile Uint32 *)(mapped_io + (reg))
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#define tdfx_out8(reg,v)	*(volatile Uint8  *)(mapped_io + (reg)) = v;
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#define tdfx_out32(reg,v)	*(volatile Uint32 *)(mapped_io + (reg)) = v;
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/* Wait for fifo space */
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#define tdfx_wait(space)						\
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{									\
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	while ( (tdfx_in8(TDFX_STATUS) & 0x1F) < space )		\
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		;							\
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}
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/* Wait for idle accelerator */
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#define tdfx_waitidle()							\
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{									\
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	int i = 0;							\
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									\
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	tdfx_wait(1);							\
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	tdfx_out32(COMMAND_3D, COMMAND_3D_NOP);				\
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	do {								\
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		i = (tdfx_in32(TDFX_STATUS) & STATUS_BUSY) ? 0 : i + 1;	\
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	} while ( i != 3 );						\
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}
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/* vi: set ts=4 sw=4 expandtab: */