1 /* $NetBSD: booted_dev.c,v 1.3 1999/11/13 21:38:20 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1999 Christopher G. Demetriou. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Christopher G. Demetriou 17 * for the NetBSD Project. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <lib/libsa/stand.h> 34 #include <lib/libkern/libkern.h> 35 36 #include <machine/prom.h> 37 #include "common.h" 38 39 long booted_dev_fd; 40 #if defined(PRIMARY_BOOTBLOCK) || defined(UNIFIED_BOOTBLOCK) 41 char booted_dev_name[BOOTED_DEV_MAXNAMELEN]; 42 #endif /* defined(PRIMARY_BOOTBLOCK) || defined(UNIFIED_BOOTBLOCK) */ 43 44 #if defined(PRIMARY_BOOTBLOCK) || defined(UNIFIED_BOOTBLOCK) 45 int 46 booted_dev_open(void) 47 { 48 prom_return_t ret; 49 int devlen; 50 51 /* 52 * XXX 53 * We don't know what device names look like yet, 54 * so we can't change them. 55 */ 56 ret.bits = prom_getenv(PROM_E_BOOTED_DEV, booted_dev_name, 57 sizeof(booted_dev_name)); 58 devlen = ret.u.retval; 59 60 ret.bits = prom_open(booted_dev_name, devlen); 61 62 if (ret.u.status) 63 return 0; 64 booted_dev_fd = ret.u.retval; 65 66 return 1; 67 } 68 #endif 69