copy_data.c
2.06 KB
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/*
* Copyright (c) 2017, Cobham Gaisler AB
* All rights reserved.
*
* 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.
*/
#include <stdint.h>
/* .data Load Memory Address (In ROM if ROM resident application) */
extern const uint32_t __data_start_lma;
/* Start/end of .data Run-time Memory Address */
extern uint32_t __data_start;
extern uint32_t __data_end;
/*
* IF .data LMA and VMA are equal THEN
* We are on a "RAM image" and nothing shall be copied.
* ELSE
* We are on a "ROM resident image" and .data has to be copied from
* persistent storage (ROM) to RAM.
* END IF
*/
void __bcc_copy_data(void)
{
const uint32_t *src = &__data_start_lma;
uint32_t *dst = &__data_start;
if (src == dst) {
return;
}
while (dst < &__data_end) {
*dst++ = *src++;
}
}