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/* Initialization code for coldfire boards.

 *

 * Copyright (c) 2006 CodeSourcery Inc

 *

 * The authors hereby grant permission to use, copy, modify, distribute,

 * and license this software and its documentation for any purpose, provided

 * that existing copyright notices are retained in all copies and that this

 * notice is included verbatim in any distributions. No written agreement,

 * license, or royalty fee is required for any of the authorized uses.

 * Modifications to this software may be copyrighted by their authors

 * and need not follow the licensing terms described here, provided that

 * the new terms are clearly indicated on the first page of each file where

 * they apply.

 */

#include <stdlib.h>

extern const int __interrupt_vector[];

extern void __reset (void);

extern const char __data_load[] __attribute__ ((aligned (4)));

extern char __data_start[] __attribute__ ((aligned (4)));

extern char __bss_start[] __attribute__ ((aligned (4)));

extern char __end[] __attribute__ ((aligned (4)));

void *__heap_limit;

extern void software_init_hook (void) __attribute__ ((weak));

extern void hardware_init_hook (void) __attribute__ ((weak));

extern void _init (void);

extern void _fini (void);

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

/* This is called from a tiny assembly stub.  */

void __start1 (void *heap_limit)

{

  unsigned ix;

  if (hardware_init_hook)

    hardware_init_hook ();

  /* Initialize memory */

  if (__data_load != __data_start)

    memcpy (__data_start, __data_load, __bss_start - __data_start);

  memset (__bss_start, 0, __end - __bss_start);

  __heap_limit = heap_limit;

  if (software_init_hook)

    software_init_hook ();

  _init ();

  /* I'm not sure how useful it is to have a fini_section in an

     embedded system.  */

  atexit (_fini);

  ix = main (0, NULL, NULL);

  exit (ix);

  while (1)

    __reset ();

}

/* A default hardware init hook.  */

void __attribute__ ((weak)) hardware_init_hook (void)

{

  /* Set the VBR. */

  __asm__ __volatile__ ("movec.l %0,%/vbr" :: "r" (__interrupt_vector));

#if !defined(__mcf_family_5213) && !defined(__mcf_family_51qe)

  /* Flush & enable the caches */

#define CACR_CINV (1 << 24)

#define CACR_CENB (1 << 31)

  __asm__ __volatile__ ("movec.l %0,%/cacr" :: "r" (CACR_CINV | CACR_CENB));

#endif

  /* Should we drop into user mode here? */

}