source: rtems/bsps/shared/start/bsp-fdt.c @ 1cba1de

5
Last change on this file since 1cba1de was 1cba1de, checked in by Sebastian Huber <sebastian.huber@…>, on Apr 13, 2018 at 7:11:58 AM

bsps: Move bsp-fdt.c to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

  • Property mode set to 100644
File size: 1.5 KB
Line 
1/*
2 * Copyright (c) 2015, 2017 embedded brains GmbH.  All rights reserved.
3 *
4 *  embedded brains GmbH
5 *  Dornierstr. 4
6 *  82178 Puchheim
7 *  Germany
8 *  <rtems@embedded-brains.de>
9 *
10 * The license and distribution terms for this file may be
11 * found in the file LICENSE in this distribution or at
12 * http://www.rtems.org/license/LICENSE.
13 */
14
15#include <sys/param.h>
16
17#include <libfdt.h>
18
19#include <bsp/fdt.h>
20#include <bsp/linker-symbols.h>
21
22#ifndef BSP_FDT_IS_SUPPORTED
23#warning "BSP FDT support indication not defined"
24#endif
25
26#ifndef BSP_FDT_BLOB_SIZE_MAX
27#define BSP_FDT_BLOB_SIZE_MAX 0
28#endif
29
30#ifdef BSP_FDT_BLOB_READ_ONLY
31static const uint32_t
32bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] = { 0xdeadbeef };
33#else
34static uint32_t
35bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)];
36#endif
37
38void bsp_fdt_copy(const void *src)
39{
40  const uint32_t *s = (const uint32_t *) src;
41#ifdef BSP_FDT_BLOB_COPY_TO_READ_ONLY_LOAD_AREA
42  uint32_t *d = (uint32_t *) ((uintptr_t) &bsp_fdt_blob[0]
43    - (uintptr_t) bsp_section_rodata_begin
44    + (uintptr_t) bsp_section_rodata_load_begin);
45#else
46  uint32_t *d = RTEMS_DECONST(uint32_t *, &bsp_fdt_blob[0]);
47#endif
48
49  if (s != d) {
50    size_t m = MIN(sizeof(bsp_fdt_blob), fdt_totalsize(src));
51    size_t n = (m + sizeof(*d) - 1) / sizeof(*d);
52    size_t i;
53
54    for (i = 0; i < n; ++i) {
55      d[i] = s[i];
56    }
57
58    rtems_cache_flush_multiple_data_lines(d, m);
59  }
60}
61
62const void *bsp_fdt_get(void)
63{
64  return &bsp_fdt_blob[0];
65}
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