root / prex-0.9.0 / bsp / boot / common / main.c @ 03e9c04a
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| 1 | 03e9c04a | Brad Neuman | /*-
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| 2 | * Copyright (c) 2005-2009, Kohsuke Ohtani
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | * 1. Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * 3. Neither the name of the author nor the names of any co-contributors
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| 14 | * may be used to endorse or promote products derived from this software
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| 15 | * without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 27 | * SUCH DAMAGE.
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| 28 | */
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| 29 | |||
| 30 | /*
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| 31 | * main.c - Boot loader main module.
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| 32 | */
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| 33 | |||
| 34 | #include <boot.h> |
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| 35 | #include <machdep.h> |
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| 36 | #include <sys/bootinfo.h> |
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| 37 | #include "load.h" |
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| 38 | |||
| 39 | typedef void (*entry_t)(void); |
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| 40 | |||
| 41 | /*
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| 42 | * Loader main routine
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| 43 | *
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| 44 | * We assume that the following machine state has
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| 45 | * been already set before this routine.
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| 46 | * - CPU is initialized.
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| 47 | * - DRAM is configured.
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| 48 | * - Loader BSS section is filled with 0.
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| 49 | * - Loader stack is configured.
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| 50 | * - All interrupts are disabled.
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| 51 | */
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| 52 | int
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| 53 | main(void)
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| 54 | {
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| 55 | entry_t entry; |
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| 56 | |||
| 57 | memset(bootinfo, 0, BOOTINFOSZ);
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| 58 | |||
| 59 | /*
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| 60 | * Initialize debug port.
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| 61 | */
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| 62 | debug_init(); |
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| 63 | DPRINTF(("Prex Boot Loader\n"));
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| 64 | |||
| 65 | /*
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| 66 | * Do platform dependent initialization.
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| 67 | */
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| 68 | startup(); |
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| 69 | |||
| 70 | /*
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| 71 | * Show splash screen.
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| 72 | */
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| 73 | splash(); |
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| 74 | |||
| 75 | /*
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| 76 | * Load OS modules to appropriate locations.
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| 77 | */
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| 78 | load_os(); |
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| 79 | |||
| 80 | /*
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| 81 | * Dump boot infomation for debug.
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| 82 | */
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| 83 | dump_bootinfo(); |
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| 84 | |||
| 85 | /*
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| 86 | * Launch kernel.
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| 87 | */
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| 88 | entry = (entry_t)kvtop(bootinfo->kernel.entry); |
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| 89 | DPRINTF(("Entering kernel (at 0x%lx) ...\n\n", (long)entry)); |
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| 90 | (*entry)(); |
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| 91 | |||
| 92 | panic("Oops!");
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| 93 | /* NOTREACHED */
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| 94 | return 0; |
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| 95 | } |
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| 96 | |||
| 97 | /*
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| 98 | * panic - show error message and hang up.
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| 99 | */
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| 100 | void
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| 101 | panic(const char *msg) |
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| 102 | {
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| 103 | |||
| 104 | DPRINTF(("Panic: %s\n", msg));
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| 105 | |||
| 106 | for (;;) ;
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| 107 | /* NOTREACHED */
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| 108 | } |