[e29f1f5] | 1 | /* |
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[9cd20cd] | 2 | * Copyright (c) 2015, 2017 embedded brains GmbH. All rights reserved. |
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[e29f1f5] | 3 | * |
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| 4 | * embedded brains GmbH |
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| 5 | * Dornierstr. 4 |
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| 6 | * 82178 Puchheim |
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| 7 | * Germany |
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| 8 | * <rtems@embedded-brains.de> |
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| 9 | * |
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| 10 | * The license and distribution terms for this file may be |
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| 11 | * found in the file LICENSE in this distribution or at |
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| 12 | * http://www.rtems.org/license/LICENSE. |
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| 13 | */ |
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| 14 | |
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| 15 | #include <sys/param.h> |
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| 16 | |
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| 17 | #include <libfdt.h> |
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| 18 | |
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| 19 | #include <bsp/fdt.h> |
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| 20 | #include <bsp/linker-symbols.h> |
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| 21 | |
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[9cd20cd] | 22 | #ifndef BSP_FDT_IS_SUPPORTED |
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| 23 | #warning "BSP FDT support indication not defined" |
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| 24 | #endif |
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| 25 | |
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[e29f1f5] | 26 | #ifndef BSP_FDT_BLOB_SIZE_MAX |
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| 27 | #define BSP_FDT_BLOB_SIZE_MAX 0 |
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| 28 | #endif |
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| 29 | |
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| 30 | #ifdef BSP_FDT_BLOB_READ_ONLY |
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| 31 | static const uint32_t |
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| 32 | bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)] = { 0xdeadbeef }; |
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| 33 | #else |
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| 34 | static uint32_t |
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| 35 | bsp_fdt_blob[BSP_FDT_BLOB_SIZE_MAX / sizeof(uint32_t)]; |
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| 36 | #endif |
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| 37 | |
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| 38 | void bsp_fdt_copy(const void *src) |
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| 39 | { |
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| 40 | const uint32_t *s = (const uint32_t *) src; |
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[d8012bbd] | 41 | #ifdef BSP_FDT_BLOB_COPY_TO_READ_ONLY_LOAD_AREA |
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[e29f1f5] | 42 | uint32_t *d = (uint32_t *) ((uintptr_t) &bsp_fdt_blob[0] |
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| 43 | - (uintptr_t) bsp_section_rodata_begin |
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| 44 | + (uintptr_t) bsp_section_rodata_load_begin); |
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| 45 | #else |
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[d8012bbd] | 46 | uint32_t *d = RTEMS_DECONST(uint32_t *, &bsp_fdt_blob[0]); |
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[e29f1f5] | 47 | #endif |
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| 48 | |
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[178180aa] | 49 | if (s != d) { |
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[241d2f2] | 50 | size_t m = MIN(sizeof(bsp_fdt_blob), fdt_totalsize(src)); |
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| 51 | size_t n = (m + sizeof(*d) - 1) / sizeof(*d); |
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| 52 | size_t i; |
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[178180aa] | 53 | |
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| 54 | for (i = 0; i < n; ++i) { |
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| 55 | d[i] = s[i]; |
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| 56 | } |
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[e29f1f5] | 57 | |
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[178180aa] | 58 | rtems_cache_flush_multiple_data_lines(d, m); |
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| 59 | } |
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[e29f1f5] | 60 | } |
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| 61 | |
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| 62 | const void *bsp_fdt_get(void) |
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| 63 | { |
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| 64 | return &bsp_fdt_blob[0]; |
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| 65 | } |
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