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      1 /*	$NetBSD: kdbreg.h,v 1.6 2021/07/24 21:31:36 andvar 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. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	@(#)kdbreg.h	7.3 (Berkeley) 6/28/90
     34  */
     35 
     36 /*
     37  * The KDB50 registers are embedded inside the bi interface
     38  * general-purpose registers.
     39  */
     40 #ifdef notdef
     41 struct	kdb_regs {
     42 	struct	biiregs kdb_bi;
     43 	short	kdb_xxx;	/* first half of GPR 0 unused */
     44 	short	kdb_ip;		/* initialisation and polling */
     45 	short	kdb_sa;		/* status & address (r/o half) */
     46 	short	kdb_sw;		/* status & address (w/o half) */
     47 };
     48 #endif
     49 
     50 #define	KDB_IP	0xf2
     51 #define	KDB_SA	0xf4
     52 #define	KDB_SW	0xf6
     53 
     54 #define KDBSR_BITS \
     55 "\20\20ERR\17STEP4\16STEP3\15STEP2\14STEP1\13oldNV\12oldQB\11DI\10IE\1GO"
     56 
     57 /*
     58  * Asserting KDB_MAP in values placed in mscp_seq.seq_buffer tells
     59  * the KDB to use mscp_seq.seq_mapbase as a set of PTEs and seq_buffer
     60  * as an offset value.  Hence we need no mappings; the KDB50 reads
     61  * the hardware page tables directly.  (Without KDB_MAP, seq_buffer
     62  * represents the physical memory address instead, and seq_mapbase is
     63  * unused.)
     64  */
     65 #define	KDB_MAP		0x80000000
     66 #define	KDB_PHYS	0		/* pseudo flag */
     67