LXR coreboot/payloads/libpayload/arch/i386/main.c

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