memerr.h revision 1.1 
1/*	$NetBSD: memerr.h,v 1.1 1996/03/26 14:57:44 gwr 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. All advertising materials mentioning features or use of this software
25 *    must display the following acknowledgement:
26 *	This product includes software developed by the University of
27 *	California, Berkeley and its contributors.
28 * 4. Neither the name of the University nor the names of its contributors
29 *    may be used to endorse or promote products derived from this software
30 *    without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 *
44 *	@(#)memreg.h	8.1 (Berkeley) 6/11/93
45 */
46
47/*
48 * Sun3 memory error register.
49 *
50 * All Sun3 memory systems use either parity checking or
51 * Error Correction Coding (ECC).  A memory error causes
52 * the Memory Error Register (MER) to latch information
53 * about the location and type of error, and if the MER
54 * interrupt is enabled, generateds a level 7 interrupt.
55 * The latched information persists (even if more errors
56 * occur) until the MER is cleared by a write (at mer_er).
57 */
58
59
60struct memerr {
61	volatile u_char	me_csr;		/* MER control/status reg. */
62	volatile u_char	me__pad[3];
63	volatile u_int	me_vaddr;
64};
65
66/*
67 * Bits in me_csr common between ECC/parity memory systems:
68 */
69#define	ME_CSR_IPEND	0x80	/* (ro) error interrupt pending */
70#define	ME_CSR_IENA 	0x40	/* (rw) error interrupt enable */
71
72/*
73 *  Bits in me_csr on parity-checked memory system:
74 */
75#define ME_PAR_TEST 	0x20	/* (rw) write inverse parity */
76#define ME_PAR_CHECK	0x10	/* (rw) enable parity checking */
77#define ME_PAR_ERR3 	0x08	/* (ro) parity error in <24..31> */
78#define ME_PAR_ERR2 	0x04	/* (ro) parity error in <16..23> */
79#define ME_PAR_ERR1 	0x02	/* (ro) parity error in <8..15> */
80#define ME_PAR_ERR0 	0x01	/* (ro) parity error in <0..7> */
81#define	ME_PAR_EMASK	0x0F	/* (ro) mask of above four */
82#define ME_PAR_STR	"\20\10IPEND\7IENA\6TEST\5CHK\4ERR3\3ERR2\2ERR1\1ERR0"
83
84/*
85 *  Bits in me_csr on an ECC memory system:
86 */
87#define ME_ECC_BUSLK	0x20	/* (rw) hold memory bus mastership */
88#define ME_ECC_CE_ENA	0x10	/* (rw) enable CE recording */
89#define	ME_ECC_WBTMO	0x08	/* (ro) write-back timeout */
90#define	ME_ECC_WBERR	0x04	/* (ro) write-back error */
91#define ME_ECC_UE		0x02	/* (ro) UE, uncorrectable error  */
92#define ME_ECC_CE		0x01	/* (ro) CE, correctable (single bit) error */
93#define	ME_ECC_EMASK	0x0F	/* (ro) mask for some ECC error occuring */
94#define ME_ECC_STR	"\20\10IPEND\7IENA\6BUSLK\5CE_ENA\4TMOUT\3WBERR\2UE\1CE"
95
96