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/*
* Copyright (c) 2015, 2017 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#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 const uint32_t
bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] CPU_STRUCTURE_ALIGNMENT =
{ 0xdeadbeef };
#else
static uint32_t
bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] CPU_STRUCTURE_ALIGNMENT;
#endif
void bsp_fdt_copy(const void *src)
{
const 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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