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prom.c revision 1.4 
      1 /*	$NetBSD: prom.c,v 1.4 2003/07/15 02:43:43 lukem 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/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: prom.c,v 1.4 2003/07/15 02:43:43 lukem Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/mbuf.h>
     45 
     46 #include <machine/cpu.h>
     47 #include <machine/prom.h>
     48 
     49 static struct mips_prom callvec;
     50 
     51 struct mips_prom *callv;
     52 
     53 typedef void (*funcp_t)(void);
     54 
     55 void
     56 prom_init(void)
     57 {
     58 	int i;
     59 	funcp_t *fp;
     60 
     61 	fp = (void *)&callvec;
     62 	for (i=0; i < sizeof(struct mips_prom)/sizeof(funcp_t); i++ ) {
     63 		fp[i] = (funcp_t)MIPS_PROM_ENTRY(i);
     64 	}
     65 	callv = &callvec;
     66 }
     67 
     68 /*
     69  * Read the environment variable 'console' to determine which serial
     70  * port will be used for the console.
     71  */
     72 int
     73 prom_getconsole(void)
     74 {
     75 	char *cp;
     76 
     77 	cp = MIPS_PROM(getenv)("console");
     78 	if (cp == NULL) {
     79 		MIPS_PROM(printf)("WARNING: defaulting to serial port 1\n");
     80 		return 1;
     81 	}
     82 	return  (*cp == '0') ? 0 : 1;
     83 }
     84