1 /* $NetBSD: boot.c,v 1.3 2000/07/21 22:26:19 jdolecek Exp $ */ 2 /* 3 * Copyright (c) 1994 Rolf Grossmann 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Rolf Grossmann. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/param.h> 33 #include <sys/reboot.h> 34 35 #include <lib/libsa/stand.h> 36 #include <lib/libkern/libkern.h> 37 38 #include <machine/cpu.h> /* for NEXT_RAMBASE */ 39 40 #define LOADADDR (char *)NEXT_RAMBASE 41 42 extern int errno; 43 44 /* 45 * Boot device is derived from PROM provided information. 46 */ 47 48 extern char *bootprog_rev; 49 extern char *bootprog_name; 50 extern int build; 51 #define KNAMEN 100 52 char kernel[KNAMEN]; 53 char *entry_point; /* return value filled in by machdep_start */ 54 55 extern void rtc_init(void); 56 57 extern int try_bootp; 58 59 char * 60 main(char *boot_arg) 61 { 62 printf(">> %s BOOT [%s #%d]\n", bootprog_name, bootprog_rev, build); 63 rtc_init(); 64 65 try_bootp = 1; 66 67 #if 0 68 printf("Press return to continue.\n"); 69 getchar(); 70 #endif 71 72 strcpy(kernel, boot_arg); 73 entry_point = NULL; 74 75 while (1) { 76 errno = 0; 77 exec(kernel, LOADADDR, 0); 78 if (errno == ENOEXEC && entry_point != NULL) { 79 printf("Kernel loaded at 0x%lx\n",(unsigned long)entry_point); 80 #if 0 81 printf("Press return to continue.\n"); 82 getchar(); 83 #endif 84 return entry_point; 85 } 86 87 printf("load of %s: %s\n", kernel, strerror(errno)); 88 printf("boot: "); 89 gets(kernel); 90 /* XXX we have to write this back into boot_arg or even mg->boot* */ 91 if (kernel[0] == '\0') 92 return NULL; 93 } 94 } 95