xref: /titanic_52/usr/src/uts/sun4/sys/eeprom.h (revision 7c478bd95313f5f23a4c958a745db2134aa03244)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1991-1998 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#ifndef _SYS_EEPROM_H
#define	_SYS_EEPROM_H

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#ifdef	__cplusplus
extern "C" {
#endif

/*
 * The EEPROM is part of the Mostek MK48T02 clock chip. The EEPROM
 * is 2K, but the last 8 bytes are used as the clock, and the 32 bytes
 * before that emulate the ID prom. There is no
 * recovery time necessary after writes to the chip.
 */
#ifndef _ASM
#include <sys/types.h>
struct ee_soft {
	ushort_t ees_wrcnt[3];		/* write count (3 copies) */
	ushort_t ees_nu1;		/* not used */
	uchar_t	ees_chksum[3];		/* software area checksum (3 copies) */
	uchar_t	ees_nu2;		/* not used */
	uchar_t	ees_resv[0xd8-0xc];	/* XXX - figure this out sometime */
};

extern caddr_t v_eeprom_addr;
#define	EEPROM		((struct eeprom *)v_eeprom_addr)
#define	IDPROM_ADDR	(v_eeprom_addr+EEPROM_SIZE) /* virt addr of idprom */
#endif /* !_ASM */

#define	EEPROM_SIZE	0x1fd8		/* size of eeprom in bytes */

/*
 * ID prom constants. They are included here because the ID prom is
 * emulated by stealing 20 bytes of the eeprom.
 */
#define	IDPROMSIZE	0x20			/* size of ID prom, in bytes */

#ifdef	__cplusplus
}
#endif

#endif	/* _SYS_EEPROM_H */