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boot.c revision 1.6 
      1 /*	$NetBSD: boot.c,v 1.6 2002/09/11 01:46:36 mycroft 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/libsa/loadfile.h>
     37 #include <lib/libkern/libkern.h>
     38 
     39 #include <machine/cpu.h>        /* for NEXT_RAMBASE */
     40 
     41 #include <next68k/next68k/nextrom.h>
     42 
     43 #define KERN_LOADADDR NEXT_RAMBASE
     44 
     45 extern int errno;
     46 
     47 extern char *mg;
     48 #define	MON(type, off) (*(type *)((u_int) (mg) + off))
     49 
     50 int devparse __P((const char *fname, int *dev,
     51 	 char *count, char *lun, char *part, char **file));
     52 
     53 /* the PROM overwrites MG_boot_arg :-( */
     54 /* #define PROCESS_ARGS */
     55 
     56 /*
     57  * Boot device is derived from PROM provided information.
     58  */
     59 
     60 extern char bootprog_rev[];
     61 extern char bootprog_name[];
     62 extern int build;
     63 #define KNAMEN 100
     64 char kernel[KNAMEN];
     65 int entry_point;		/* return value filled in by machdep_start */
     66 
     67 extern void rtc_init(void);
     68 
     69 extern int try_bootp;
     70 
     71 volatile int qq;
     72 
     73 int
     74 main(char *boot_arg)
     75 {
     76 	int fd;
     77 	u_long marks[MARK_MAX];
     78 	int dev;
     79 	char count, lun, part;
     80 	char *file;
     81 #ifdef PROCESS_ARGS
     82 	char *kernel_args = MON(char *, MG_boot_dev);
     83 #endif
     84 
     85 	memset(marks, 0, sizeof(marks));
     86 	printf(">> %s BOOT [%s #%d]\n", bootprog_name, bootprog_rev, build);
     87 	rtc_init();
     88 
     89 	try_bootp = 1;
     90 
     91 #if 0
     92 	{
     93 		int i;
     94 		int *p = (int *)mg;
     95 		for (i = 0; i <= 896; ) {
     96 			printf ("%d: %x %x %x %x %x %x %x %x\n", i, p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
     97 			p = &p[8];
     98 			i += 8*4;
     99 		}
    100 	}
    101 	printf("Press return to continue.\n");
    102 	getchar();
    103 #endif
    104 
    105 	strcpy(kernel, boot_arg);
    106 	entry_point = NULL;
    107 
    108 	for (;;) {
    109 		marks[MARK_START] = (u_long)KERN_LOADADDR;
    110 		fd = loadfile(kernel, marks, LOAD_KERNEL);
    111 		if (fd != -1) {
    112 			break;
    113 		}
    114 
    115 		printf("load of %s: %s\n", kernel, strerror(errno));
    116 		printf("boot: ");
    117 		gets(kernel);
    118 		if (kernel[0] == '\0')
    119 			return NULL;
    120 
    121 #ifdef PROCESS_ARGS
    122 		kernel_args = strchr(kernel, ')');
    123 		if (kernel_args == NULL)
    124 			kernel_args = kernel;
    125 		kernel_args = strchr(kernel_args, ' ');
    126 		if (kernel_args)
    127 			*kernel_args++ = '\0';
    128 #endif
    129 	}
    130 
    131 	dev = 0;
    132 	count = lun = part = 0;
    133 	if (devparse(kernel, &dev, &count, &lun, &part, &file) == 0) {
    134 		char *p = (char *)marks[MARK_END];
    135 		strcpy (p, devsw[dev].dv_name);
    136 		MON(char *, MG_boot_dev) = p;
    137 		p += strlen (p) + 1;
    138 		sprintf (p, "(%d,%d,%d)", count, lun, part);
    139 		MON(char *, MG_boot_info) = p;
    140 		p += strlen (p) + 1;
    141 		sprintf (p, "%s", file);
    142 		MON(char *, MG_boot_file) = p;
    143 #ifdef PROCESS_ARGS
    144 		p += strlen (p) + 1;
    145 		if (kernel_args)
    146 			strcpy (p, kernel_args);
    147 		else
    148 			*p = 0;
    149 		MON(char *, MG_boot_arg) = p;
    150 #endif
    151 	}
    152 
    153 	*((u_long *)KERN_LOADADDR) = marks[MARK_END] - KERN_LOADADDR;
    154 	printf("entry 0x%lx esym 0x%lx\n",
    155 	       marks[MARK_ENTRY], marks[MARK_END] - KERN_LOADADDR);
    156 	return marks[MARK_ENTRY];
    157 }
    158