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/******************************************************************************

*                                                                             *

* License Agreement                                                           *

*                                                                             *

* Copyright (c) 2007 Altera Corporation, San Jose, California, USA.           *

* All rights reserved.                                                        *

*                                                                             *

* Permission is hereby granted, free of charge, to any person obtaining a     *

* copy of this software and associated documentation files (the "Software"),  *

* to deal in the Software without restriction, including without limitation   *

* the rights to use, copy, modify, merge, publish, distribute, sublicense,    *

* and/or sell copies of the Software, and to permit persons to whom the       *

* Software is furnished to do so, subject to the following conditions:        *

*                                                                             *

* The above copyright notice and this permission notice shall be included in  *

* all copies or substantial portions of the Software.                         *

*                                                                             *

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR  *

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,    *

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE *

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER      *

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING     *

* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER         *

* DEALINGS IN THE SOFTWARE.                                                   *

*                                                                             *

* This agreement shall be governed in all respects by the laws of the State   *

* of California and by the laws of the United States of America.              *

*                                                                             *

* Altera does not recommend, suggest or require that this reference design    *

* file be used in conjunction or combination with any other product.          *

******************************************************************************/

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <fcntl.h>

#include <stdlib.h>

#include <unistd.h>

#include "sys/alt_dev.h"

#include "sys/alt_sys_init.h"

#include "sys/alt_irq.h"

#include "sys/alt_dev.h"

#include "os/alt_hooks.h"

#include "priv/alt_file.h"

#include "alt_types.h"

#include "system.h"

#include "sys/alt_log_printf.h"

extern void _do_ctors(void);

extern void _do_dtors(void);

/*

 * Standard arguments for main. By default, no arguments are passed to main.

 * However a device driver may choose to configure these arguments by calling

 * alt_set_args(). The expectation is that this facility will only be used by

 * the iclient/ihost utility.

 */

int    alt_argc = 0;

char** alt_argv = {NULL};

char** alt_envp = {NULL};

/*

 * Prototype for the entry point to the users application.

 */

extern int main (int, char **, char **);

/*

 * alt_main is the C entry point for the HAL. It is called by the assembler

 * startup code in the processor specific crt0.S. It is responsible for:

 * completing the C runtime configuration; configuring all the

 * devices/filesystems/components in the system; and call the entry point for

 * the users application, i.e. main().

 */

void alt_main (void)

{

#ifndef ALT_NO_EXIT    

  int result;

#endif

  /* ALT LOG - please see HAL/sys/alt_log_printf.h for details */

  ALT_LOG_PRINT_BOOT("[alt_main.c] Entering alt_main, calling alt_irq_init.\r\n");

  /* Initialize the interrupt controller. */

  alt_irq_init (NULL);

  /* Initialize the operating system */

  ALT_LOG_PRINT_BOOT("[alt_main.c] Done alt_irq_init, calling alt_os_init.\r\n");

  ALT_OS_INIT();

  /*

   * Initialize the semaphore used to control access to the file descriptor

   * list.

   */

  ALT_LOG_PRINT_BOOT("[alt_main.c] Done OS Init, calling alt_sem_create.\r\n");

  ALT_SEM_CREATE (&alt_fd_list_lock, 1);

  /* Initialize the device drivers/software components. */

  ALT_LOG_PRINT_BOOT("[alt_main.c] Calling alt_sys_init.\r\n");

  alt_sys_init();

  ALT_LOG_PRINT_BOOT("[alt_main.c] Done alt_sys_init.\r\n");

#if !defined(ALT_USE_DIRECT_DRIVERS) && (defined(ALT_STDIN_PRESENT) || defined(ALT_STDOUT_PRESENT) || defined(ALT_STDERR_PRESENT))

  /*

   * Redirect stdio to the apropriate devices now that the devices have

   * been initialized. This is only done if the user has requested these

   * devices be present (not equal to /dev/null) and if direct drivers

   * aren't being used.

   */

    ALT_LOG_PRINT_BOOT("[alt_main.c] Redirecting IO.\r\n");

    alt_io_redirect(ALT_STDOUT, ALT_STDIN, ALT_STDERR);

#endif

#ifndef ALT_NO_C_PLUS_PLUS

  /*

   * Call the C++ constructors

   */

  ALT_LOG_PRINT_BOOT("[alt_main.c] Calling C++ constructors.\r\n");

  _do_ctors ();

#endif /* ALT_NO_C_PLUS_PLUS */

#if !defined(ALT_NO_C_PLUS_PLUS) && !defined(ALT_NO_CLEAN_EXIT) && !defined(ALT_NO_EXIT)

  /*

   * Set the C++ destructors to be called at system shutdown. This is only done

   * if a clean exit has been requested (i.e. the exit() function has not been

   * redefined as _exit()). This is in the interest of reducing code footprint,

   * in that the atexit() overhead is removed when it's not needed.

   */

  ALT_LOG_PRINT_BOOT("[alt_main.c] Calling atexit.\r\n");

  atexit (_do_dtors);

#endif

  /*

   * Finally, call main(). The return code is then passed to a subsequent

   * call to exit() unless the application is never supposed to exit.

   */

  ALT_LOG_PRINT_BOOT("[alt_main.c] Calling main.\r\n");

#ifdef ALT_NO_EXIT

  main (alt_argc, alt_argv, alt_envp);

#else

  result = main (alt_argc, alt_argv, alt_envp);

  close(STDOUT_FILENO);

  exit (result);

#endif

  ALT_LOG_PRINT_BOOT("[alt_main.c] After main - we should not be here?.\r\n");

}