1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @ingroup rtems_ramdisk |
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7 | * |
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8 | * @brief RAM disk block device implementation. |
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9 | */ |
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10 | |
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11 | /* |
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12 | * Copyright (C) 2009, 2012 embedded brains GmbH & Co. KG |
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13 | * |
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14 | * Redistribution and use in source and binary forms, with or without |
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15 | * modification, are permitted provided that the following conditions |
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16 | * are met: |
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17 | * 1. Redistributions of source code must retain the above copyright |
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18 | * notice, this list of conditions and the following disclaimer. |
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19 | * 2. Redistributions in binary form must reproduce the above copyright |
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20 | * notice, this list of conditions and the following disclaimer in the |
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21 | * documentation and/or other materials provided with the distribution. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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33 | * POSSIBILITY OF SUCH DAMAGE. |
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34 | */ |
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35 | |
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36 | #ifdef HAVE_CONFIG_H |
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37 | #include "config.h" |
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38 | #endif |
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39 | |
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40 | #include <stdlib.h> |
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41 | |
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42 | #include <rtems.h> |
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43 | #include <rtems/ramdisk.h> |
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44 | |
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45 | ramdisk *ramdisk_allocate( |
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46 | void *area_begin, |
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47 | uint32_t media_block_size, |
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48 | rtems_blkdev_bnum media_block_count, |
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49 | bool trace |
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50 | ) |
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51 | { |
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52 | struct ramdisk *rd = calloc(1, sizeof(*rd)); |
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53 | |
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54 | if (rd == NULL) { |
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55 | return NULL; |
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56 | } |
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57 | |
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58 | if (area_begin == NULL) { |
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59 | area_begin = calloc(media_block_count, media_block_size); |
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60 | if (area_begin == NULL) { |
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61 | free(rd); |
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62 | |
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63 | return NULL; |
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64 | } |
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65 | rd->malloced = true; |
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66 | } else { |
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67 | rd->malloced = false; |
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68 | } |
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69 | rd->block_size = media_block_size; |
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70 | rd->block_num = media_block_count; |
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71 | rd->area = area_begin; |
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72 | rd->trace = trace; |
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73 | rd->initialized = true; |
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74 | |
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75 | return rd; |
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76 | } |
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77 | |
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78 | void ramdisk_free(ramdisk *rd) |
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79 | { |
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80 | if (rd != NULL) { |
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81 | if (rd->malloced) { |
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82 | free(rd->area); |
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83 | } |
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84 | free(rd); |
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85 | } |
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86 | } |
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