text: /*
   * Copyright (C) 2017-2019 Alibaba Group Holding Limited
   */
  
  /******************************************************************************
   * @file     pre_main.c
   * @brief    source file for the pre_main
   * @version  V1.0
   * @date     04. April 2019
   ******************************************************************************/
  
  #include <csi_config.h>
  #include <soc.h>
  
  extern int main(void);
  /*
   *  The ranges of copy from/to are specified by following symbols
   *    __erodata: LMA of start of the section to copy from. Usually end of rodata
   *    __data_start__: VMA of start of the section to copy to
   *    __data_end__: VMA of end of the section to copy to
   *
   *  All addresses must be aligned to 4 bytes boundary.
   */
  void section_data_copy(void)
  {
      extern unsigned long __erodata;
      extern unsigned long __data_start__;
      extern unsigned long __data_end__;
  
      if (((unsigned long)&__erodata != (unsigned long)&__data_start__)) {
          unsigned long src_addr = (unsigned long)&__erodata;
          memcpy((void *)(&__data_start__), \
                 (void *)src_addr, \
                 (unsigned long)(&__data_end__) - (unsigned long)(&__data_start__));
      }
  }
  
  void section_ram_code_copy(void)
  {
      extern unsigned long __erodata;
      extern unsigned long __data_start__;
      extern unsigned long __data_end__;
      extern unsigned long __ram_code_start__;
      extern unsigned long __ram_code_end__;
  
      if (((unsigned long)&__erodata != (unsigned long)&__data_start__)) {
          unsigned long src_addr = (unsigned long)&__erodata;
          src_addr += (unsigned long)(&__data_end__) - (unsigned long)(&__data_start__);
          memcpy((void *)(&__ram_code_start__), \
                 (void *)src_addr, \
                 (unsigned long)(&__ram_code_end__) - (unsigned long)(&__ram_code_start__));
      }
  }
  
  /*
   *  The BSS section is specified by following symbols
   *    __bss_start__: start of the BSS section.
   *    __bss_end__: end of the BSS section.
   *
   *  Both addresses must be aligned to 4 bytes boundary.
   */
  void section_bss_clear(void)
  {
      extern unsigned long __bss_start__;
      extern unsigned long __bss_end__;
  
      memset((void *)(&__bss_start__), \
             0, \
             (unsigned long)(&__bss_end__) - (unsigned long)(&__bss_start__));
  
  }
  
  __attribute__((weak)) void pre_main(void)
  {
  #ifndef CONFIG_KERNEL_RHINO
  #ifndef CONFIG_NUTTXMM_NONE
      extern void mm_heap_initialize();
      mm_heap_initialize();
  #endif
  #endif
  
      main();
  }
  