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view src/video/fbcon/matrox_mmio.h @ 1036:50f4e7e4d117

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[SDL] [PATCH] fix FB_VideoQuit for ia64 Jesse Barnes Fri Jan 14 11:13:54 PST 2005 I noticed that on my ia64 machine when SDL_Quit was called, the machine would hang in weird ways. It turned out to be caused by a machine check in the memset() call near the top of FB_VideoQuit. Generally memset shouldn't be used on I/O regions like the framebuffer or other I/O device memory (the Linux kernel has special routines for dealing with I/O memory), so I changed the #ifdef __powerpc__ to #if defined(__powerpc__) || defined(__ia64__) and SDL_Quit now works properly. The change should probably be made unconditional though since doing one byte at a time is the only way to be portable, afaik.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 12 Feb 2005 18:03:54 +0000
parents b8d311d90021
children c9b51268668f
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/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2004 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id$";
#endif

/* MGA register definitions */

#include "matrox_regs.h"

/* MGA control macros */

#define mga_in8(reg)		*(volatile Uint8  *)(mapped_io + (reg))
#define mga_in32(reg)		*(volatile Uint32 *)(mapped_io + (reg))

#define mga_out8(reg,v)		*(volatile Uint8  *)(mapped_io + (reg)) = v;
#define mga_out32(reg,v)	*(volatile Uint32 *)(mapped_io + (reg)) = v;


/* Wait for fifo space */
#define mga_wait(space)							\
{									\
	while ( mga_in8(MGAREG_FIFOSTATUS) < space )			\
		;							\
}


/* Wait for idle accelerator */
#define mga_waitidle()							\
{									\
	while ( mga_in32(MGAREG_STATUS) & 0x10000 )			\
		;							\
}