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boot.c revision 1.13 
      1 /*	$NetBSD: boot.c,v 1.13 2023/02/11 02:33:27 tsutsui 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(const char *, int *, char *, char *, char *, char **);
     51 
     52 /* the PROM overwrites MG_boot_arg :-( */
     53 /* #define PROCESS_ARGS */
     54 
     55 /*
     56  * Boot device is derived from PROM provided information.
     57  */
     58 
     59 extern char bootprog_rev[];
     60 extern char bootprog_name[];
     61 extern int build;
     62 #define KNAMEN 100
     63 char kernel[KNAMEN];
     64 int entry_point;		/* return value filled in by machdep_start */
     65 int turbo;
     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 machine;
     81 	char *file;
     82 #ifdef PROCESS_ARGS
     83 	char *kernel_args = MON(char *, MG_boot_dev);
     84 #endif
     85 
     86 	machine = MON(char, MG_machine_type);
     87 	if (machine == NeXT_TURBO_MONO ||
     88 	    machine == NeXT_TURBO_COLOR ||
     89 	    machine == NeXT_CUBE_TURBO)
     90 		turbo = 1;
     91 	else
     92 		turbo = 0;
     93 
     94 	memset(marks, 0, sizeof(marks));
     95 	printf(">> %s BOOT [%s #%d]\n", bootprog_name, bootprog_rev, build);
     96 	printf(">> type %d, %sturbo\n", machine, turbo ? "" : "non-");
     97 	rtc_init();
     98 
     99 	try_bootp = 1;
    100 
    101 #if 0
    102 	{
    103 		int i;
    104 		int *p = (int *)mg;
    105 		for (i = 0; i <= 896; ) {
    106 			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]);
    107 			p = &p[8];
    108 			i += 8*4;
    109 		}
    110 	}
    111 	printf("Press return to continue.\n");
    112 	getchar();
    113 #endif
    114 
    115 	strcpy(kernel, boot_arg);
    116 	entry_point = 0;
    117 
    118 	for (;;) {
    119 		marks[MARK_START] = (u_long)KERN_LOADADDR;
    120 		fd = loadfile(kernel, marks, LOAD_KERNEL);
    121 		if (fd != -1) {
    122 			break;
    123 		}
    124 
    125 		printf("load of %s: %s\n", kernel, strerror(errno));
    126 		printf("boot: ");
    127 		kgets(kernel, sizeof(kernel));
    128 		if (kernel[0] == '\0')
    129 			return 0;
    130 
    131 #ifdef PROCESS_ARGS
    132 		kernel_args = strchr(kernel, ')');
    133 		if (kernel_args == NULL)
    134 			kernel_args = kernel;
    135 		kernel_args = strchr(kernel_args, ' ');
    136 		if (kernel_args)
    137 			*kernel_args++ = '\0';
    138 #endif
    139 	}
    140 
    141 	dev = 0;
    142 	count = lun = part = 0;
    143 	if (devparse(kernel, &dev, &count, &lun, &part, &file) == 0) {
    144 		char *p = (char *)marks[MARK_END];
    145 		strcpy (p, devsw[dev].dv_name);
    146 		MON(char *, MG_boot_dev) = p;
    147 		p += strlen (p) + 1;
    148 		snprintf (p, 1024, "(%d,%d,%d)", count, lun, part); /* XXX */
    149 		MON(char *, MG_boot_info) = p;
    150 		p += strlen (p) + 1;
    151 		snprintf (p, 1024, "%s", file); /* XXX */
    152 		MON(char *, MG_boot_file) = p;
    153 #ifdef PROCESS_ARGS
    154 		p += strlen (p) + 1;
    155 		if (kernel_args)
    156 			strcpy (p, kernel_args);
    157 		else
    158 			*p = 0;
    159 		MON(char *, MG_boot_arg) = p;
    160 #endif
    161 	}
    162 
    163 	*((u_long *)KERN_LOADADDR) = marks[MARK_END] - KERN_LOADADDR;
    164 	printf("entry 0x%lx esym 0x%lx\n",
    165 	       marks[MARK_ENTRY], marks[MARK_END] - KERN_LOADADDR);
    166 	return marks[MARK_ENTRY];
    167 }
    168