1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Block Device Disk Management Initialize |
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5 | * @ingroup rtems_disk Block Device Disk Management |
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6 | */ |
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7 | |
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8 | /* |
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9 | * Copyright (c) 2012 embedded brains GmbH. All rights reserved. |
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10 | * |
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11 | * embedded brains GmbH |
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12 | * Obere Lagerstr. 30 |
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13 | * 82178 Puchheim |
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14 | * Germany |
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15 | * <rtems@embedded-brains.de> |
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16 | * |
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17 | * The license and distribution terms for this file may be |
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18 | * found in the file LICENSE in this distribution or at |
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19 | * http://www.rtems.com/license/LICENSE. |
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20 | */ |
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21 | |
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22 | #if HAVE_CONFIG_H |
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23 | #include "config.h" |
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24 | #endif |
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25 | |
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26 | #include <rtems/blkdev.h> |
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27 | #include <rtems/bdbuf.h> |
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28 | |
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29 | #include <string.h> |
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30 | |
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31 | rtems_status_code rtems_disk_init_phys( |
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32 | rtems_disk_device *dd, |
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33 | uint32_t block_size, |
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34 | rtems_blkdev_bnum block_count, |
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35 | rtems_block_device_ioctl handler, |
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36 | void *driver_data |
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37 | ) |
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38 | { |
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39 | rtems_status_code sc; |
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40 | |
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41 | dd = memset(dd, 0, sizeof(*dd)); |
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42 | |
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43 | dd->phys_dev = dd; |
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44 | dd->size = block_count; |
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45 | dd->media_block_size = block_size; |
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46 | dd->ioctl = handler; |
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47 | dd->driver_data = driver_data; |
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48 | dd->read_ahead.trigger = RTEMS_DISK_READ_AHEAD_NO_TRIGGER; |
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49 | |
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50 | if (block_count > 0) { |
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51 | if ((*handler)(dd, RTEMS_BLKIO_CAPABILITIES, &dd->capabilities) != 0) { |
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52 | dd->capabilities = 0; |
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53 | } |
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54 | |
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55 | sc = rtems_bdbuf_set_block_size(dd, block_size, false); |
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56 | } else { |
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57 | sc = RTEMS_INVALID_NUMBER; |
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58 | } |
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59 | |
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60 | return sc; |
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61 | } |
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62 | |
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63 | rtems_status_code rtems_disk_init_log( |
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64 | rtems_disk_device *dd, |
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65 | rtems_disk_device *phys_dd, |
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66 | rtems_blkdev_bnum block_begin, |
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67 | rtems_blkdev_bnum block_count |
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68 | ) |
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69 | { |
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70 | rtems_status_code sc; |
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71 | |
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72 | dd = memset(dd, 0, sizeof(*dd)); |
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73 | |
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74 | dd->phys_dev = phys_dd; |
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75 | dd->start = block_begin; |
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76 | dd->size = block_count; |
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77 | dd->media_block_size = phys_dd->media_block_size; |
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78 | dd->ioctl = phys_dd->ioctl; |
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79 | dd->driver_data = phys_dd->driver_data; |
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80 | dd->read_ahead.trigger = RTEMS_DISK_READ_AHEAD_NO_TRIGGER; |
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81 | |
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82 | if (phys_dd->phys_dev == phys_dd) { |
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83 | rtems_blkdev_bnum phys_block_count = phys_dd->size; |
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84 | |
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85 | if ( |
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86 | block_begin < phys_block_count |
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87 | && block_count > 0 |
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88 | && block_count <= phys_block_count - block_begin |
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89 | ) { |
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90 | sc = rtems_bdbuf_set_block_size(dd, phys_dd->media_block_size, false); |
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91 | } else { |
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92 | sc = RTEMS_INVALID_NUMBER; |
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93 | } |
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94 | } else { |
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95 | sc = RTEMS_INVALID_ID; |
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96 | } |
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97 | |
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98 | return sc; |
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99 | } |
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