/* $NetBSD: boot.c,v 1.33 2016/06/11 06:26:06 dholland Exp $ */

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell.
 *
 * 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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
 *
 *	@(#)boot.c	8.1 (Berkeley) 6/10/93
 */

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

#include <sys/param.h>
#include <sys/exec.h>
#include <sys/exec_ecoff.h>

#include <machine/autoconf.h>
#include <machine/prom.h>
#include <machine/rpb.h>

#include <machine/pte.h>

#include "common.h"

#if !defined(UNIFIED_BOOTBLOCK) && !defined(SECONDARY_BOOTBLOCK)
#error not UNIFIED_BOOTBLOCK and not SECONDARY_BOOTBLOCK
#endif

char boot_file[128];
char boot_flags[128];

struct bootinfo_v1 bootinfo_v1;

paddr_t ffp_save, ptbr_save;

int debug;

char *kernelnames[] = {
	"netbsd",		"netbsd.gz",
	"netbsd.bak",		"netbsd.bak.gz",
	"netbsd.old",		"netbsd.old.gz",
	"onetbsd",		"onetbsd.gz",
	"netbsd.alpha",		"netbsd.alpha.gz",
	NULL
};

void
#if defined(UNIFIED_BOOTBLOCK)
main(void)
#else /* defined(SECONDARY_BOOTBLOCK) */
main(long fd)
#endif
{
	char *name, **namep;
	u_long marks[MARK_MAX];
	u_int64_t entry;
	int win, loadflag;

	/* Init prom callback vector. */
	init_prom_calls();

	/* print a banner */
	printf("\n");
	printf("NetBSD/alpha " NETBSD_VERS " " BOOT_TYPE_NAME " Bootstrap, Revision %s\n",
	    bootprog_rev);
	printf("\n");

	/* set up the booted device descriptor */
#if defined(UNIFIED_BOOTBLOCK)
        if (!booted_dev_open()) {
                printf("Boot device (%s) open failed.\n",
		    booted_dev_name[0] ? booted_dev_name : "unknown");
                goto fail;
        }
#else /* defined(SECONDARY_BOOTBLOCK) */
	booted_dev_setfd(fd);
#endif

	/* switch to OSF pal code. */
	OSFpal();

	printf("\n");

	prom_getenv(PROM_E_BOOTED_FILE, boot_file, sizeof(boot_file));
	prom_getenv(PROM_E_BOOTED_OSFLAGS, boot_flags, sizeof(boot_flags));

	if (boot_file[0] != 0)
		(void)printf("Boot file: %s\n", boot_file);
	(void)printf("Boot flags: %s\n", boot_flags);

	if (strchr(boot_flags, 'i') || strchr(boot_flags, 'I')) {
		printf("Boot file: ");
		kgets(boot_file, sizeof(boot_file));
	}

#ifdef NO_LOAD_BACKWARDS
	loadflag = LOAD_KERNEL & ~LOAD_BACKWARDS;
#else
	loadflag = LOAD_KERNEL;
#endif

	memset(marks, 0, sizeof marks);
	if (boot_file[0] != '\0') {
		name = boot_file;
		win = loadfile(name, marks, loadflag) == 0;
	} else {
		name = NULL;	/* XXX gcc -Wuninitialized */
		for (namep = kernelnames, win = 0; *namep != NULL && !win;
		    namep++) {
			name = *namep;
			win = loadfile(name, marks, loadflag) == 0;
		}
	}

	entry = marks[MARK_ENTRY];
	booted_dev_close();
	printf("\n");
	if (!win)
		goto fail;

	/*
	 * Fill in the bootinfo for the kernel.
	 */
	memset(&bootinfo_v1, 0, sizeof(bootinfo_v1));
	bootinfo_v1.ssym = marks[MARK_SYM];
	bootinfo_v1.esym = marks[MARK_END];
	memcpy(bootinfo_v1.booted_kernel, name,
	    sizeof(bootinfo_v1.booted_kernel));
	memcpy(bootinfo_v1.boot_flags, boot_flags,
	    sizeof(bootinfo_v1.boot_flags));
	bootinfo_v1.hwrpb = (void *)HWRPB_ADDR;
	bootinfo_v1.hwrpbsize = ((struct rpb *)HWRPB_ADDR)->rpb_size;
	bootinfo_v1.cngetc = NULL;
	bootinfo_v1.cnputc = NULL;
	bootinfo_v1.cnpollc = NULL;

	(void)printf("Entering %s at 0x%lx...\n", name, entry);
	alpha_pal_imb();
	(*(void (*)(u_int64_t, u_int64_t, u_int64_t, void *, u_int64_t,
	    u_int64_t))entry)(ffp_save, ptbr_save, BOOTINFO_MAGIC,
	    &bootinfo_v1, 1, 0);

	(void)printf("KERNEL RETURNED!\n");

fail:
	(void)printf("Boot failed!  Halting...\n");
	halt();
}