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prom.c revision 1.3 
      1 /*	$NetBSD: prom.c,v 1.3 2000/12/03 04:51:04 matt 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/mbuf.h>
     42 
     43 #include <machine/cpu.h>
     44 #include <machine/prom.h>
     45 
     46 static struct mips_prom callvec;
     47 
     48 struct mips_prom *callv;
     49 
     50 typedef void (*funcp_t)(void);
     51 
     52 void
     53 prom_init(void)
     54 {
     55 	int i;
     56 	funcp_t *fp;
     57 
     58 	fp = (void *)&callvec;
     59 	for (i=0; i < sizeof(struct mips_prom)/sizeof(funcp_t); i++ ) {
     60 		fp[i] = (funcp_t)MIPS_PROM_ENTRY(i);
     61 	}
     62 	callv = &callvec;
     63 }
     64 
     65 /*
     66  * Read the environment variable 'console' to determine which serial
     67  * port will be used for the console.
     68  */
     69 int
     70 prom_getconsole(void)
     71 {
     72 	char *cp;
     73 
     74 	cp = MIPS_PROM(getenv)("console");
     75 	if (cp == NULL) {
     76 		MIPS_PROM(printf)("WARNING: defaulting to serial port 1\n");
     77 		return 1;
     78 	}
     79 	return  (*cp == '0') ? 0 : 1;
     80 }
     81