memreg.h

早期freebsd实现

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Lawrence Berkeley Laboratory.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)memreg.h	8.1 (Berkeley) 6/11/93
 *
 * from: $Header: memreg.h,v 1.6 92/11/26 03:05:05 torek Exp $ (LBL)
 */

/*
 * Sun-4c memory error register.
 * The register is a single word.
 */
volatile int	*par_err_reg;	/* virtual address; NULL if not yet mapped */

/*
 * Bits in parity error register.
 * The register is cleared when read, except for the test and enable bits.
 */
#define	PER_ERR		0x80	/* a parity error occurred */
#define	PER_MULTI	0x40	/* more than one occurred */
#define	PER_TEST	0x20	/* test (invert parity) */
#define	PER_ENABLE	0x10	/* enable parity error reports */
#define	PER_BYTE0	0x08	/* error occurred in byte 0 (bits 31..24) */
#define	PER_BYTE1	0x04	/* error occurred in byte 1 (bits 23..16) */
#define	PER_BYTE2	0x02	/* error occurred in byte 2 (bits 15..8) */
#define	PER_BYTE3	0x01	/* error occurred in byte 3 (bits 7..0) */

#define	PER_BITS "\20\10ERR\7MULTI\6TEST\5ENABLE\4BYTE0\3BYTE1\2BYTE2\1BYTE3"