scoutos / 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 | } |