libfbx-ati-misc.c

libfxb是linux下只写操作framebuffer的一个轻量级的库。

/*
 *  libfbx-ati-misc.c -- Miscellaneous routines for ati optimizations
 *  (C)opyright 2001 U4X Labs
 *
 *  Written by: Paul Mundt <[e-mail]>
 *
 *  $Id: libfbx-ati-misc.c,v 1.3 2001/03/03 01:34:43 lethal Exp $
 *
 *  	This is the place for all the ati 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-ati.h>

#define aty_handle_idx(x) if (x >= 0x400) x -= 0x800

inline __u8 aty_ld_8(__u32 idx)
{
	aty_handle_idx(idx);

	return fb_inb(idx);
}

inline void aty_st_8(__u32 idx, __u8 val)
{
	aty_handle_idx(idx);

	fb_outb(idx, val);
}

inline __u32 aty_ld_le32(__u32 idx)
{
	aty_handle_idx(idx);

	return fb_inl(idx);
}

inline void aty_st_le32(__u32 idx, __u32 val)
{
	aty_handle_idx(idx);

	fb_outl(idx, val);
}

inline void aty_wait_fifo(__u16 entries)
{
	do {

	} while ((aty_ld_le32(FIFO_STAT) & 0xffff) > ((__u32)(0x8000 >> entries)));
}

inline void aty_wait_idle()
{
	aty_wait_fifo(16);

	do {

	} while ((aty_ld_le32(GUI_STAT) & 1) != 0);
}