1 /* $NetBSD: prom.c,v 1.6 2008/04/28 20:23:28 martin Exp $ */ 2 3 /* 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Wayne Knowles 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: prom.c,v 1.6 2008/04/28 20:23:28 martin Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/mbuf.h> 38 39 #include <machine/cpu.h> 40 #include <machine/prom.h> 41 42 static struct mips_prom callvec; 43 44 struct mips_prom *callv; 45 46 typedef void (*funcp_t)(void); 47 48 void 49 prom_init(void) 50 { 51 int i; 52 funcp_t *fp; 53 54 fp = (void *)&callvec; 55 for (i=0; i < sizeof(struct mips_prom)/sizeof(funcp_t); i++ ) { 56 fp[i] = (funcp_t)MIPS_PROM_ENTRY(i); 57 } 58 callv = &callvec; 59 } 60 61 /* 62 * Read the environment variable 'console' to determine which serial 63 * port will be used for the console. 64 */ 65 int 66 prom_getconsole(void) 67 { 68 char *cp; 69 70 cp = MIPS_PROM(getenv)("console"); 71 if (cp == NULL) { 72 MIPS_PROM(printf)("WARNING: defaulting to serial port 1\n"); 73 return 1; 74 } 75 return (*cp == '0') ? 0 : 1; 76 } 77