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booted_dev.c revision 1.1 
      1  1.1  cgd /* $NetBSD: booted_dev.c,v 1.1 1999/04/02 03:19:08 cgd Exp $ */
      2  1.1  cgd 
      3  1.1  cgd /*
      4  1.1  cgd  * Copyright (c) 1999 Christopher G. Demetriou.  All rights reserved.
      5  1.1  cgd  *
      6  1.1  cgd  * Redistribution and use in source and binary forms, with or without
      7  1.1  cgd  * modification, are permitted provided that the following conditions
      8  1.1  cgd  * are met:
      9  1.1  cgd  * 1. Redistributions of source code must retain the above copyright
     10  1.1  cgd  *    notice, this list of conditions and the following disclaimer.
     11  1.1  cgd  * 2. Redistributions in binary form must reproduce the above copyright
     12  1.1  cgd  *    notice, this list of conditions and the following disclaimer in the
     13  1.1  cgd  *    documentation and/or other materials provided with the distribution.
     14  1.1  cgd  * 3. All advertising materials mentioning features or use of this software
     15  1.1  cgd  *    must display the following acknowledgement:
     16  1.1  cgd  *      This product includes software developed by Christopher G. Demetriou
     17  1.1  cgd  *	for the NetBSD Project.
     18  1.1  cgd  * 4. The name of the author may not be used to endorse or promote products
     19  1.1  cgd  *    derived from this software without specific prior written permission
     20  1.1  cgd  *
     21  1.1  cgd  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  1.1  cgd  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  1.1  cgd  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  1.1  cgd  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  1.1  cgd  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  1.1  cgd  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  1.1  cgd  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  1.1  cgd  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  1.1  cgd  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  1.1  cgd  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  1.1  cgd  */
     32  1.1  cgd 
     33  1.1  cgd #include <lib/libsa/stand.h>
     34  1.1  cgd #include <lib/libkern/libkern.h>
     35  1.1  cgd 
     36  1.1  cgd #include <machine/prom.h>
     37  1.1  cgd #include "common.h"
     38  1.1  cgd 
     39  1.1  cgd long	booted_dev_fd;
     40  1.1  cgd #if defined(PRIMARY_BOOTBLOCK) || defined(UNIFIED_BOOTBLOCK)
     41  1.1  cgd char	booted_dev_name[BOOTED_DEV_MAXNAMELEN];
     42  1.1  cgd #endif /* defined(PRIMARY_BOOTBLOCK) || defined(UNIFIED_BOOTBLOCK) */
     43  1.1  cgd 
     44  1.1  cgd #if defined(PRIMARY_BOOTBLOCK) || defined(UNIFIED_BOOTBLOCK)
     45  1.1  cgd int
     46  1.1  cgd booted_dev_open(void)
     47  1.1  cgd {
     48  1.1  cgd 	prom_return_t ret;
     49  1.1  cgd 	int devlen;
     50  1.1  cgd 
     51  1.1  cgd 	/*
     52  1.1  cgd 	 * XXX
     53  1.1  cgd 	 * We don't know what device names look like yet,
     54  1.1  cgd 	 * so we can't change them.
     55  1.1  cgd 	 */
     56  1.1  cgd 	ret.bits = prom_getenv(PROM_E_BOOTED_DEV, booted_dev_name,
     57  1.1  cgd 	    sizeof(booted_dev_name));
     58  1.1  cgd 	devlen = ret.u.retval;
     59  1.1  cgd 
     60  1.1  cgd 	ret.bits = prom_open(booted_dev_name, devlen);
     61  1.1  cgd 
     62  1.1  cgd 	if (ret.u.status)
     63  1.1  cgd 		return 0;
     64  1.1  cgd 	booted_dev_fd = ret.u.retval;
     65  1.1  cgd 
     66  1.1  cgd 	return 1;
     67  1.1  cgd }
     68  1.1  cgd #endif
     69