forked from Imagelibrary/rtems
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (c) 2015, 2017 embedded brains GmbH. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 RTEMS_ALIGNED(8) const uint32_t
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bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] =
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{ 0xdeadbeef };
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#else
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static RTEMS_ALIGNED(8) uint32_t
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bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)];
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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 volatile 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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