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      1 /*	$NetBSD: boot.c,v 1.15 2023/02/12 10:04:56 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/libsa/dev_net.h>
     38 #include <lib/libkern/libkern.h>
     39 
     40 #include <machine/cpu.h>        /* for NEXT_RAMBASE */
     41 
     42 #include <next68k/next68k/nextrom.h>
     43 
     44 #include "samachdep.h"
     45 
     46 #define KERN_LOADADDR NEXT_RAMBASE
     47 
     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 #define KNAMEN 100
     60 char kernel[KNAMEN];
     61 int entry_point;		/* return value filled in by machdep_start */
     62 int cpuspeed = MHZ_33;		/* assume fastest 33 MHz for sanity */
     63 int turbo;
     64 
     65 volatile int qq;
     66 
     67 int
     68 main(char *boot_arg)
     69 {
     70 	int fd;
     71 	u_long marks[MARK_MAX];
     72 	int dev;
     73 	char count, lun, part;
     74 	char machine;
     75 	char *file;
     76 #ifdef PROCESS_ARGS
     77 	char *kernel_args = MON(char *, MG_boot_dev);
     78 #endif
     79 
     80 	machine = MON(char, MG_machine_type);
     81 	if (machine == NeXT_TURBO_MONO ||
     82 	    machine == NeXT_TURBO_COLOR ||
     83 	    machine == NeXT_CUBE_TURBO) {
     84 		turbo = 1;
     85 		cpuspeed = MHZ_33;
     86 	} else {
     87 		turbo = 0;
     88 		cpuspeed = MHZ_25;
     89 	}
     90 
     91 	memset(marks, 0, sizeof(marks));
     92 	printf(">> %s BOOT [%s #%d]\n", bootprog_name, bootprog_rev, build);
     93 	printf(">> type %d, %sturbo\n", machine, turbo ? "" : "non-");
     94 	rtc_init();
     95 
     96 	try_bootp = 1;
     97 
     98 #if 0
     99 	{
    100 		int i;
    101 		int *p = (int *)mg;
    102 		for (i = 0; i <= 896; ) {
    103 			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]);
    104 			p = &p[8];
    105 			i += 8*4;
    106 		}
    107 	}
    108 	printf("Press return to continue.\n");
    109 	getchar();
    110 #endif
    111 
    112 	strcpy(kernel, boot_arg);
    113 	entry_point = 0;
    114 
    115 	for (;;) {
    116 		marks[MARK_START] = (u_long)KERN_LOADADDR;
    117 		fd = loadfile(kernel, marks, LOAD_KERNEL);
    118 		if (fd != -1) {
    119 			break;
    120 		}
    121 
    122 		printf("load of %s: %s\n", kernel, strerror(errno));
    123 		printf("boot: ");
    124 		kgets(kernel, sizeof(kernel));
    125 		if (kernel[0] == '\0')
    126 			return 0;
    127 
    128 #ifdef PROCESS_ARGS
    129 		kernel_args = strchr(kernel, ')');
    130 		if (kernel_args == NULL)
    131 			kernel_args = kernel;
    132 		kernel_args = strchr(kernel_args, ' ');
    133 		if (kernel_args)
    134 			*kernel_args++ = '\0';
    135 #endif
    136 	}
    137 
    138 	dev = 0;
    139 	count = lun = part = 0;
    140 	if (devparse(kernel, &dev, &count, &lun, &part, &file) == 0) {
    141 		char *p = (char *)marks[MARK_END];
    142 		strcpy (p, devsw[dev].dv_name);
    143 		MON(char *, MG_boot_dev) = p;
    144 		p += strlen (p) + 1;
    145 		snprintf (p, 1024, "(%d,%d,%d)", count, lun, part); /* XXX */
    146 		MON(char *, MG_boot_info) = p;
    147 		p += strlen (p) + 1;
    148 		snprintf (p, 1024, "%s", file); /* XXX */
    149 		MON(char *, MG_boot_file) = p;
    150 #ifdef PROCESS_ARGS
    151 		p += strlen (p) + 1;
    152 		if (kernel_args)
    153 			strcpy (p, kernel_args);
    154 		else
    155 			*p = 0;
    156 		MON(char *, MG_boot_arg) = p;
    157 #endif
    158 	}
    159 
    160 	*((u_long *)KERN_LOADADDR) = marks[MARK_END] - KERN_LOADADDR;
    161 	printf("entry 0x%lx esym 0x%lx\n",
    162 	       marks[MARK_ENTRY], marks[MARK_END] - KERN_LOADADDR);
    163 	return marks[MARK_ENTRY];
    164 }
    165