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/*
* Copyright (C) 2017-2024 Alibaba Group Holding Limited
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/******************************************************************************
* @file pre_main.c
* @brief source file for the pre_main
* @version V1.0
* @date 04. April 2024
******************************************************************************/
#include "pre_main.h"
/*
* 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__));
}
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