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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (c) 2015, 2017 embedded brains GmbH. 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 <sys/param.h>
#include <libfdt.h>
#include <bsp/fdt.h>
#include <bsp/linker-symbols.h>
#ifndef BSP_FDT_IS_SUPPORTED
#warning "BSP FDT support indication not defined"
#endif
#ifndef BSP_FDT_BLOB_SIZE_MAX
#define BSP_FDT_BLOB_SIZE_MAX 0
#endif
#ifdef BSP_FDT_BLOB_READ_ONLY
static RTEMS_ALIGNED(8) const uint32_t
bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] =
{ 0xdeadbeef };
#else
static RTEMS_ALIGNED(8) uint32_t
bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)];
#endif
void bsp_fdt_copy(const void *src)
{
const volatile uint32_t *s = (const uint32_t *) src;
#ifdef BSP_FDT_BLOB_COPY_TO_READ_ONLY_LOAD_AREA
uint32_t *d = (uint32_t *) ((uintptr_t) &bsp_fdt_blob[0]
- (uintptr_t) bsp_section_rodata_begin
+ (uintptr_t) bsp_section_rodata_load_begin);
#else
uint32_t *d = RTEMS_DECONST(uint32_t *, &bsp_fdt_blob[0]);
#endif
if (s != d) {
size_t m = MIN(sizeof(bsp_fdt_blob), fdt_totalsize(src));
size_t aligned_size = roundup2(m, CPU_CACHE_LINE_BYTES);
size_t n = (m + sizeof(*d) - 1) / sizeof(*d);
size_t i;
for (i = 0; i < n; ++i) {
d[i] = s[i];
}
rtems_cache_flush_multiple_data_lines(d, aligned_size);
}
}
const void *bsp_fdt_get(void)
{
return &bsp_fdt_blob[0];
}
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