1 /* $NetBSD: console.c,v 1.7 2002/03/13 13:12:29 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 33 #include <dev/arcbios/arcbios.h> 34 #include <dev/arcbios/arcbiosvar.h> 35 36 #include <dev/cons.h> 37 38 #include "zsc.h" 39 40 extern struct consdev zs_cn; 41 42 void 43 consinit() 44 { 45 char* consdev; 46 47 /* Ask ARCS what it is using for console output. */ 48 consdev = ARCBIOS->GetEnvironmentVariable("ConsoleOut"); 49 if (consdev == NULL) { 50 printf("WARNING: ConsoleOut environment variable not set\n"); 51 goto force_arcs; 52 } 53 54 #if NZSC > 0 55 /* XXX This is Indigo2/Indy-specific. */ 56 if (strlen(consdev) == 9 && 57 strncmp(consdev, "serial", 6) == 0 && 58 (consdev[7] == '0' || consdev[7] == '1')) { 59 cn_tab = &zs_cn; 60 (*cn_tab->cn_init)(cn_tab); 61 return; 62 } 63 #endif 64 65 force_arcs: 66 printf("Using ARCS for console I/O.\n"); 67 } 68