1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief rtems_region_create |
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5 | * @ingroup ClassicRegion Regions |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-1999. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <rtems/rtems/regionimpl.h> |
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22 | #include <rtems/rtems/attrimpl.h> |
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23 | #include <rtems/rtems/support.h> |
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24 | #include <rtems/score/apimutex.h> |
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25 | #include <rtems/score/threadqimpl.h> |
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26 | |
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27 | /* |
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28 | * rtems_region_create |
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29 | * |
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30 | * This directive creates a region of physical contiguous memory area |
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31 | * from which variable sized segments can be allocated. |
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32 | * |
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33 | * Input parameters: |
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34 | * name - user defined region name |
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35 | * starting_address - physical start address of region |
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36 | * length - physical length in bytes |
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37 | * page_size - page size in bytes |
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38 | * attribute_set - region attributes |
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39 | * id - address of region id to set |
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40 | * |
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41 | * Output parameters: |
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42 | * id - region id |
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43 | * RTEMS_SUCCESSFUL - if successful |
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44 | * error code - if unsuccessful |
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45 | */ |
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46 | |
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47 | rtems_status_code rtems_region_create( |
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48 | rtems_name name, |
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49 | void *starting_address, |
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50 | uintptr_t length, |
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51 | uintptr_t page_size, |
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52 | rtems_attribute attribute_set, |
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53 | rtems_id *id |
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54 | ) |
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55 | { |
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56 | rtems_status_code return_status; |
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57 | Region_Control *the_region; |
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58 | |
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59 | if ( !rtems_is_name_valid( name ) ) |
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60 | return RTEMS_INVALID_NAME; |
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61 | |
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62 | if ( !starting_address ) |
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63 | return RTEMS_INVALID_ADDRESS; |
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64 | |
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65 | if ( !id ) |
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66 | return RTEMS_INVALID_ADDRESS; |
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67 | |
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68 | the_region = _Region_Allocate(); |
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69 | |
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70 | if ( !the_region ) |
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71 | return_status = RTEMS_TOO_MANY; |
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72 | |
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73 | else { |
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74 | _Thread_queue_Object_initialize( &the_region->Wait_queue ); |
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75 | |
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76 | if ( _Attributes_Is_priority( attribute_set ) ) { |
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77 | the_region->wait_operations = &_Thread_queue_Operations_priority; |
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78 | } else { |
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79 | the_region->wait_operations = &_Thread_queue_Operations_FIFO; |
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80 | } |
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81 | |
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82 | the_region->maximum_segment_size = _Heap_Initialize( |
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83 | &the_region->Memory, starting_address, length, page_size |
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84 | ); |
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85 | |
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86 | if ( !the_region->maximum_segment_size ) { |
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87 | _Region_Free( the_region ); |
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88 | return_status = RTEMS_INVALID_SIZE; |
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89 | } else { |
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90 | the_region->attribute_set = attribute_set; |
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91 | |
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92 | _Objects_Open( |
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93 | &_Region_Information, |
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94 | &the_region->Object, |
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95 | (Objects_Name) name |
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96 | ); |
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97 | |
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98 | *id = the_region->Object.id; |
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99 | return_status = RTEMS_SUCCESSFUL; |
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100 | } |
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101 | } |
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102 | |
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103 | _Objects_Allocator_unlock(); |
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104 | |
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105 | return return_status; |
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106 | } |
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