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kdbreg.h revision 1.2 
      1 /*	$NetBSD: kdbreg.h,v 1.2 1999/07/12 13:43:24 ragge Exp $	*/
      2 /*
      3  * Copyright (c) 1988 Regents of the University of California.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to Berkeley by
      7  * Chris Torek.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the University of
     20  *	California, Berkeley and its contributors.
     21  * 4. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  *	@(#)kdbreg.h	7.3 (Berkeley) 6/28/90
     38  */
     39 
     40 /*
     41  * The KDB50 registers are embedded inside the bi interface
     42  * general-purpose registers.
     43  */
     44 struct	kdb_regs {
     45 	struct	biiregs kdb_bi;
     46 	short	kdb_xxx;	/* first half of GPR 0 unused */
     47 	short	kdb_ip;		/* initialisation and polling */
     48 	short	kdb_sa;		/* status & address (r/o half) */
     49 	short	kdb_sw;		/* status & address (w/o half) */
     50 };
     51 
     52 #define KDBSR_BITS \
     53 "\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13oldNV\12oldQB\11DI\10IE\1GO"
     54 
     55 /*
     56  * Asserting KDB_MAP in values placed in mscp_seq.seq_buffer tells
     57  * the KDB to use mscp_seq.seq_mapbase as a set of PTEs and seq_buffer
     58  * as an offset value.  Hence we need no mappings; the KDB50 reads
     59  * the hardware page tables directly.  (Without KDB_MAP, seq_bufer
     60  * represents the physical memory address instead, and seq_mapbase is
     61  * unused.)
     62  */
     63 #define	KDB_MAP		0x80000000
     64 #define	KDB_PHYS	0		/* pseudo flag */
     65