Home | History | Annotate | Line # | Download | only in mipsco 
      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