libfbx-mga-misc.c

libfxb是linux下只写操作framebuffer的一个轻量级的库。

/*
 *  libfbx-mga-misc.c -- Miscellaneous routines for mga optimizations
 *  (C)opyright 2001 U4X Labs
 *
 *  Written by: Paul Mundt <[e-mail]>
 *
 *  $Id: libfbx-mga-misc.c,v 1.6 2001/03/03 01:34:43 lethal Exp $
 *
 *  	This is the place for all the mga hardware specific
 *  optimizations for the libfbx system go.
 *
 *  See ChangeLog for modifications, CREDITS for credits.
 *
 *  All source herein is copyright U4X Labs and its original author. 
 *  Any code modifications or additions are (C)opyright the original 
 *  author and U4X Labs respectively.
 *
 *  libfbx 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.
 *
 *  libfbx 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 libfbx; if not, write to the Free Software 
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA
 */
#include <libfbx/libfbx-drivers.h>
#include <libfbx/drivers/libfbx-mga.h>

inline void mga_wait_idle()
{
	do {

	} while (fb_inl(M_STATUS) & 0x10000);
}

inline void mga_fifo(__u8 val)
{
	/*
	 * There's no need to do a seperate loop for little
	 * endian using mga_inb(). The compiler should be able
	 * to determine if it needs %al or %eax & 0xff.
	 *
	 * Also, on some little endian architectures (alpha
	 * for example), mga_inl() is a better solution than
	 * mga_inb().
	 *
	 * This was discovered by Petr Vandrovec <[e-mail]>
	 */
	do {

	} while ((fb_inl(M_FIFOSTATUS) & 0xff) < val);
}

inline void mga_ydstlen(__u32 y, __u32 l)
{
	fb_outl(M_YDSTLEN | M_EXEC, (y << 16) | l);
}