1 /*
2 *
3 * Copyright (C) 2008 Advanced Micro Devices, Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <exception.h>
30 #include <libpayload.h>
31 #include <arch/apic.h>
32
33 int main_argc; /**< The argc value to pass to main() */
34
35 /** The argv value to pass to main() */
36 char *main_argv[MAX_ARGC_COUNT];
37
38 /**
39 * This is our C entry function - set up the system
40 * and jump into the payload entry point.
41 */
42 int start_main(void);
start_main(void)43 int start_main(void)
44 {
45 extern int main(int argc, char **argv);
46
47 /* Gather system information. */
48 lib_get_sysinfo();
49
50 /* Optionally set up the consoles. */
51 #if !CONFIG(LP_SKIP_CONSOLE_INIT)
52 console_init();
53 #endif
54
55 exception_init();
56
57 if (CONFIG(LP_ENABLE_APIC)) {
58 apic_init();
59
60 enable_interrupts();
61 }
62
63 /*
64 * Any other system init that has to happen before the
65 * user gets control goes here.
66 */
67
68 /*
69 * Go to the entry point.
70 * In the future we may care about the return value.
71 */
72
73 /*
74 * Returning from main() will go to the _leave function to return
75 * us to the original context.
76 */
77 return main(main_argc, (main_argc != 0) ? main_argv : NULL);
78 }
79