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      1 /*	$NetBSD: cg4reg.h,v 1.7 2005/12/11 12:19:20 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * All advertising materials mentioning features or use of this software
     12  * must display the following acknowledgement:
     13  *	This product includes software developed by the University of
     14  *	California, Lawrence Berkeley Laboratory.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  * 3. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  *	@(#)cgthreereg.h	8.2 (Berkeley) 10/30/93
     41  */
     42 
     43 /*
     44  * Size that can be mapped (user-level mmap).
     45  */
     46 #define	CG4_OVERLAY_SIZE	 0x20000	/* size of overlay plane */
     47 #define	CG4_ENABLE_SIZE 	 0x20000	/* size of enable plane */
     48 #define	CG4_PIXMAP_SIZE		0x100000	/* size of frame buffer */
     49 
     50 /* number of colormap entries */
     51 #define CG4_CMAP_ENTRIES	256
     52 
     53 /*
     54  * There are two kinds of cg4 hardware:
     55  * "Type A" has a AMD DACs (Digital-to-Analog Converters)
     56  * "Type B" has a Brooktree DACs.  H/W addresses differ too.
     57  */
     58 
     59 /*
     60  * Memory layout of the Type A hardware (OBMEM)
     61  */
     62 #define CG4A_OFF_ENABLE     0
     63 #define CG4A_OFF_PIXMAP	  0x400000
     64 #define CG4A_OFF_OVERLAY  0xC00000
     65 #define CG4A_OBIO_CMAP	  0x0E0000	/* OBIO space! */
     66 
     67 /* colormap/status register structure */
     68 struct amd_regs {
     69 	u_char r[CG4_CMAP_ENTRIES];
     70 	u_char g[CG4_CMAP_ENTRIES];
     71 	u_char b[CG4_CMAP_ENTRIES];
     72 	u_char status;
     73 #define CG4A_STATUS_FIRSTHALF	0x80
     74 #define CG4A_STATUS_TOOLATE	0x40
     75 };
     76 
     77 
     78 /*
     79  * Memory layout of the Type B hardware (OBMEM)
     80  * P4 appears on the Sun3/60 at 0xFF300000, so
     81  * define things relative to that.
     82  */
     83 #define CG4B_OFF_CMAP  (-0x100000)
     84 #define CG4B_OFF_OVERLAY 0x100000
     85 #define CG4B_OFF_ENABLE  0x300000
     86 #define CG4B_OFF_PIXMAP  0x500000
     87 
     88