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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License, Version 1.0 only
      6  * (the "License").  You may not use this file except in compliance
      7  * with the License.
      8  *
      9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
     10  * or http://www.opensolaris.org/os/licensing.
     11  * See the License for the specific language governing permissions
     12  * and limitations under the License.
     13  *
     14  * When distributing Covered Code, include this CDDL HEADER in each
     15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     16  * If applicable, add the following below this CDDL HEADER, with the
     17  * fields enclosed by brackets "[]" replaced with your own identifying
     18  * information: Portions Copyright [yyyy] [name of copyright owner]
     19  *
     20  * CDDL HEADER END
     21  */
     22 /*
     23  * Copyright (c) 1991-1998 by Sun Microsystems, Inc.
     24  * All rights reserved.
     25  */
     26 
     27 #ifndef _SYS_EEPROM_H
     28 #define	_SYS_EEPROM_H
     29 
     30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     31 
     32 #ifdef	__cplusplus
     33 extern "C" {
     34 #endif
     35 
     36 /*
     37  * The EEPROM is part of the Mostek MK48T02 clock chip. The EEPROM
     38  * is 2K, but the last 8 bytes are used as the clock, and the 32 bytes
     39  * before that emulate the ID prom. There is no
     40  * recovery time necessary after writes to the chip.
     41  */
     42 #ifndef _ASM
     43 #include <sys/types.h>
     44 struct ee_soft {
     45 	ushort_t ees_wrcnt[3];		/* write count (3 copies) */
     46 	ushort_t ees_nu1;		/* not used */
     47 	uchar_t	ees_chksum[3];		/* software area checksum (3 copies) */
     48 	uchar_t	ees_nu2;		/* not used */
     49 	uchar_t	ees_resv[0xd8-0xc];	/* XXX - figure this out sometime */
     50 };
     51 
     52 extern caddr_t v_eeprom_addr;
     53 #define	EEPROM		((struct eeprom *)v_eeprom_addr)
     54 #define	IDPROM_ADDR	(v_eeprom_addr+EEPROM_SIZE) /* virt addr of idprom */
     55 #endif /* !_ASM */
     56 
     57 #define	EEPROM_SIZE	0x1fd8		/* size of eeprom in bytes */
     58 
     59 /*
     60  * ID prom constants. They are included here because the ID prom is
     61  * emulated by stealing 20 bytes of the eeprom.
     62  */
     63 #define	IDPROMSIZE	0x20			/* size of ID prom, in bytes */
     64 
     65 #ifdef	__cplusplus
     66 }
     67 #endif
     68 
     69 #endif	/* _SYS_EEPROM_H */
     70