forked from Imagelibrary/rtems
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
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* Copyright (c) 2015, 2017 embedded brains GmbH. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <sys/param.h>
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#include <libfdt.h>
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#include <bsp/fdt.h>
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#include <bsp/linker-symbols.h>
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#ifndef BSP_FDT_IS_SUPPORTED
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#warning "BSP FDT support indication not defined"
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#endif
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#ifndef BSP_FDT_BLOB_SIZE_MAX
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#define BSP_FDT_BLOB_SIZE_MAX 0
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#endif
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#ifdef BSP_FDT_BLOB_READ_ONLY
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static const uint32_t
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bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] CPU_STRUCTURE_ALIGNMENT =
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{ 0xdeadbeef };
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#else
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static uint32_t
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bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] CPU_STRUCTURE_ALIGNMENT;
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#endif
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void bsp_fdt_copy(const void *src)
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{
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const uint32_t *s = (const uint32_t *) src;
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#ifdef BSP_FDT_BLOB_COPY_TO_READ_ONLY_LOAD_AREA
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uint32_t *d = (uint32_t *) ((uintptr_t) &bsp_fdt_blob[0]
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- (uintptr_t) bsp_section_rodata_begin
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+ (uintptr_t) bsp_section_rodata_load_begin);
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#else
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uint32_t *d = RTEMS_DECONST(uint32_t *, &bsp_fdt_blob[0]);
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#endif
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if (s != d) {
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size_t m = MIN(sizeof(bsp_fdt_blob), fdt_totalsize(src));
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size_t aligned_size = roundup2(m, CPU_CACHE_LINE_BYTES);
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size_t n = (m + sizeof(*d) - 1) / sizeof(*d);
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size_t i;
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for (i = 0; i < n; ++i) {
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d[i] = s[i];
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}
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rtems_cache_flush_multiple_data_lines(d, aligned_size);
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}
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}
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const void *bsp_fdt_get(void)
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{
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return &bsp_fdt_blob[0];
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}
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