/*      $NetBSD: boot.c,v 1.15 2023/02/12 10:04:56 tsutsui Exp $        */
/*
* Copyright (c) 1994 Rolf Grossmann
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by Rolf Grossmann.
* 4. The name of the author may not be used to endorse or promote products
*    derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <sys/param.h>
#include <sys/reboot.h>

#include <lib/libsa/stand.h>
#include <lib/libsa/loadfile.h>
#include <lib/libsa/dev_net.h>
#include <lib/libkern/libkern.h>

#include <machine/cpu.h>        /* for NEXT_RAMBASE */

#include <next68k/next68k/nextrom.h>

#include "samachdep.h"

#define KERN_LOADADDR NEXT_RAMBASE

#define MON(type, off) (*(type *)((u_int) (mg) + off))

int devparse(const char *, int *, char *, char *, char *, char **);

/* the PROM overwrites MG_boot_arg :-( */
/* #define PROCESS_ARGS */

/*
* Boot device is derived from PROM provided information.
*/

#define KNAMEN 100
char kernel[KNAMEN];
int entry_point;                /* return value filled in by machdep_start */
int cpuspeed = MHZ_33;          /* assume fastest 33 MHz for sanity */
int turbo;

volatile int qq;

int
main(char *boot_arg)
{
       int fd;
       u_long marks[MARK_MAX];
       int dev;
       char count, lun, part;
       char machine;
       char *file;
#ifdef PROCESS_ARGS
       char *kernel_args = MON(char *, MG_boot_dev);
#endif

       machine = MON(char, MG_machine_type);
       if (machine == NeXT_TURBO_MONO ||
           machine == NeXT_TURBO_COLOR ||
           machine == NeXT_CUBE_TURBO) {
               turbo = 1;
               cpuspeed = MHZ_33;
       } else {
               turbo = 0;
               cpuspeed = MHZ_25;
       }

       memset(marks, 0, sizeof(marks));
       printf(">> %s BOOT [%s #%d]\n", bootprog_name, bootprog_rev, build);
       printf(">> type %d, %sturbo\n", machine, turbo ? "" : "non-");
       rtc_init();

       try_bootp = 1;

#if 0
       {
               int i;
               int *p = (int *)mg;
               for (i = 0; i <= 896; ) {
                       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]);
                       p = &p[8];
                       i += 8*4;
               }
       }
       printf("Press return to continue.\n");
       getchar();
#endif

       strcpy(kernel, boot_arg);
       entry_point = 0;

       for (;;) {
               marks[MARK_START] = (u_long)KERN_LOADADDR;
               fd = loadfile(kernel, marks, LOAD_KERNEL);
               if (fd != -1) {
                       break;
               }

               printf("load of %s: %s\n", kernel, strerror(errno));
               printf("boot: ");
               kgets(kernel, sizeof(kernel));
               if (kernel[0] == '\0')
                       return 0;

#ifdef PROCESS_ARGS
               kernel_args = strchr(kernel, ')');
               if (kernel_args == NULL)
                       kernel_args = kernel;
               kernel_args = strchr(kernel_args, ' ');
               if (kernel_args)
                       *kernel_args++ = '\0';
#endif
       }

       dev = 0;
       count = lun = part = 0;
       if (devparse(kernel, &dev, &count, &lun, &part, &file) == 0) {
               char *p = (char *)marks[MARK_END];
               strcpy (p, devsw[dev].dv_name);
               MON(char *, MG_boot_dev) = p;
               p += strlen (p) + 1;
               snprintf (p, 1024, "(%d,%d,%d)", count, lun, part); /* XXX */
               MON(char *, MG_boot_info) = p;
               p += strlen (p) + 1;
               snprintf (p, 1024, "%s", file); /* XXX */
               MON(char *, MG_boot_file) = p;
#ifdef PROCESS_ARGS
               p += strlen (p) + 1;
               if (kernel_args)
                       strcpy (p, kernel_args);
               else
                       *p = 0;
               MON(char *, MG_boot_arg) = p;
#endif
       }

       *((u_long *)KERN_LOADADDR) = marks[MARK_END] - KERN_LOADADDR;
       printf("entry 0x%lx esym 0x%lx\n",
              marks[MARK_ENTRY], marks[MARK_END] - KERN_LOADADDR);
       return marks[MARK_ENTRY];
}