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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [libgloss/] [m68k/] [cf-crt1.c] - Rev 207
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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? */ }