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 /* SPDX-License-Identifier: BSD-2-Clause */
 
 /**
  * @file
  *
  * @ingroup arm_start
  *
  * @brief ARM system low level start.
  */
 
 /*
  * Copyright (C) 2008, 2013 embedded brains GmbH & Co. KG
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef LIBBSP_ARM_SHARED_START_H
 #define LIBBSP_ARM_SHARED_START_H
 
 #include <string.h>
 
 #include <bsp/linker-symbols.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif /* __cplusplus */
 
 /**
  * @defgroup arm_start System Start
  *
  * @ingroup RTEMSBSPsARMShared
  *
  * @brief ARM system low level start.
  *
  * @{
  */
 
 #define BSP_START_TEXT_SECTION __attribute__((section(".bsp_start_text")))
 
 #define BSP_START_DATA_SECTION __attribute__((section(".bsp_start_data")))
 
 /**
 * @brief System start entry.
 */
 void _start(void);
 
 /**
 * @brief Start entry hook 0.
 *
 * This hook will be called from the start entry code after all modes and
 * stack pointers are initialized but before the copying of the exception
 * vectors.
 */
 void bsp_start_hook_0(void);
 
 /**
 * @brief Can be used by bsp_start_hook_0() to jump back to the start code
 *   instead of using the link register.
 */
 void bsp_start_hook_0_done(void);
 
 /**
 * @brief Start entry hook 1.
 *
 * This hook will be called from the start entry code after copying of the
 * exception vectors but before the call to boot_card().
 */
 void bsp_start_hook_1(void);
 
 /**
  * @brief Similar to standard memcpy().
  *
  * The memory areas must be word aligned.  Copy code will be executed from the
  * stack.  If @a dest equals @a src nothing will be copied.
  */
 void bsp_start_memcpy(int *dest, const int *src, size_t n);
 
 /**
  * @brief ARM entry point to bsp_start_memcpy().
  */
 void bsp_start_memcpy_arm(int *dest, const int *src, size_t n);
 
 /**
  * @brief Copies all standard sections from the load to the runtime area.
  */
 BSP_START_TEXT_SECTION static inline void bsp_start_copy_sections(void)
 {
   /* Copy .text section */
   bsp_start_memcpy(
     (int *) bsp_section_text_begin,
     (const int *) bsp_section_text_load_begin,
     (size_t) bsp_section_text_size
   );
 
   /* Copy .rodata section */
   bsp_start_memcpy(
     (int *) bsp_section_rodata_begin,
     (const int *) bsp_section_rodata_load_begin,
     (size_t) bsp_section_rodata_size
   );
 
   /* Copy .data section */
   bsp_start_memcpy(
     (int *) bsp_section_data_begin,
     (const int *) bsp_section_data_load_begin,
     (size_t) bsp_section_data_size
   );
 
   /* Copy .fast_text section */
   bsp_start_memcpy(
     (int *) bsp_section_fast_text_begin,
     (const int *) bsp_section_fast_text_load_begin,
     (size_t) bsp_section_fast_text_size
   );
 
   /* Copy .fast_data section */
   bsp_start_memcpy(
     (int *) bsp_section_fast_data_begin,
     (const int *) bsp_section_fast_data_load_begin,
     (size_t) bsp_section_fast_data_size
   );
 }
 
 BSP_START_TEXT_SECTION static inline void
 bsp_start_memcpy_libc(void *dest, const void *src, size_t n)
 {
   if (dest != src) {
     memcpy(dest, src, n);
   }
 }
 
 /**
  * @brief Copies the .data, .fast_text and .fast_data sections from the load to
  * the runtime area using the C library memcpy().
  *
  * Works only in case the .start, .text and .rodata sections reside in one
  * memory region.
  */
 BSP_START_TEXT_SECTION static inline void bsp_start_copy_sections_compact(void)
 {
   /* Copy .data section */
   bsp_start_memcpy_libc(
     bsp_section_data_begin,
     bsp_section_data_load_begin,
     (size_t) bsp_section_data_size
   );
 
   /* Copy .fast_text section */
   bsp_start_memcpy_libc(
     bsp_section_fast_text_begin,
     bsp_section_fast_text_load_begin,
     (size_t) bsp_section_fast_text_size
   );
 
   /* Copy .fast_data section */
   bsp_start_memcpy_libc(
     bsp_section_fast_data_begin,
     bsp_section_fast_data_load_begin,
     (size_t) bsp_section_fast_data_size
   );
 }
 
 BSP_START_TEXT_SECTION static inline void bsp_start_clear_bss(void)
 {
   memset(bsp_section_bss_begin, 0, (size_t) bsp_section_bss_size);
 }
 
 /** @} */
 
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
 
 #endif /* LIBBSP_ARM_SHARED_START_H */

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