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/*-
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 * Copyright (c) 2005-2009, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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/*
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 * main.c - Boot loader main module.
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 */
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#include <boot.h>
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#include <machdep.h>
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#include <sys/bootinfo.h>
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#include "load.h"
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typedef void (*entry_t)(void);
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/*
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 * Loader main routine
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 *
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 * We assume that the following machine state has
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 * been already set before this routine.
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 *        - CPU is initialized.
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 *        - DRAM is configured.
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 *        - Loader BSS section is filled with 0.
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 *        - Loader stack is configured.
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 *        - All interrupts are disabled.
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 */
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int
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main(void)
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{
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        entry_t entry;
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        memset(bootinfo, 0, BOOTINFOSZ);
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        /*
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         * Initialize debug port.
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         */
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        debug_init();
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        DPRINTF(("Prex Boot Loader\n"));
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        /*
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         * Do platform dependent initialization.
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         */
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        startup();
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        /*
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         * Show splash screen.
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         */
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        splash();
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        /*
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         * Load OS modules to appropriate locations.
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         */
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        load_os();
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        /*
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         * Dump boot infomation for debug.
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         */
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        dump_bootinfo();
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        /*
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         * Launch kernel.
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         */
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        entry = (entry_t)kvtop(bootinfo->kernel.entry);
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        DPRINTF(("Entering kernel (at 0x%lx) ...\n\n", (long)entry));
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        (*entry)();
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        panic("Oops!");
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        /* NOTREACHED */
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        return 0;
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}
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/*
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 * panic - show error message and hang up.
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 */
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void
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panic(const char *msg)
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{
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        DPRINTF(("Panic: %s\n", msg));
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        for (;;) ;
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        /* NOTREACHED */
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}