1 | /** |
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2 | * @file rtems/init.h |
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3 | * |
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4 | * @brief Constants and Structures Associated |
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5 | * with the Initialization Manager |
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6 | * |
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7 | * This include file contains all the constants and structures associated |
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8 | * with the Initialization Manager. This manager is responsible for |
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9 | * initializing RTEMS, creating and starting all configured initialization |
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10 | * tasks, invoking the initialization routine for each user-supplied device |
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11 | * driver, and initializing the optional multiprocessor layer. |
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12 | * |
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13 | * This manager provides directives to: |
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14 | * |
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15 | * + initialize the RTEMS executive |
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16 | * + shutdown the RTEMS executive |
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17 | */ |
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18 | |
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19 | /* |
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20 | * COPYRIGHT (c) 1989-2008. |
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21 | * On-Line Applications Research Corporation (OAR). |
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22 | * |
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23 | * The license and distribution terms for this file may be |
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24 | * found in the file LICENSE in this distribution or at |
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25 | * http://www.rtems.com/license/LICENSE. |
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26 | */ |
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27 | |
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28 | #ifndef _RTEMS_INIT_H |
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29 | #define _RTEMS_INIT_H |
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30 | |
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31 | #ifdef __cplusplus |
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32 | extern "C" { |
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33 | #endif |
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34 | |
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35 | #include <rtems/rtems/types.h> |
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36 | #include <rtems/config.h> |
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37 | #include <rtems/rtems/intr.h> |
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38 | |
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39 | #if defined(RTEMS_MULTIPROCESSING) |
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40 | /** |
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41 | * The following defines the default Multiprocessing Configuration |
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42 | * Table. This table is used in a single processor system. |
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43 | */ |
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44 | extern const rtems_multiprocessing_table |
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45 | _Initialization_Default_multiprocessing_table; |
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46 | #endif |
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47 | |
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48 | /** |
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49 | * @brief rtems_initialize_data_structures |
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50 | * |
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51 | * This routine implements the portion of the RTEMS initializatin process |
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52 | * that involves initializing data structures to a state that scheduling |
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53 | * can occur in a consistent manner. |
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54 | */ |
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55 | void rtems_initialize_data_structures(void); |
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56 | |
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57 | /** |
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58 | * @brief rtems_initialize_before_drivers |
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59 | * |
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60 | * This routine implements the portion of RTEMS initialization that |
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61 | * is done immediately before device drivers are initialized. |
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62 | */ |
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63 | void rtems_initialize_before_drivers(void); |
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64 | |
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65 | /** |
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66 | * @brief rtems_initialize_device_drivers |
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67 | * |
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68 | * This routine implements the portion of RTEMS initialization that |
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69 | * initializes all device drivers. |
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70 | */ |
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71 | void rtems_initialize_device_drivers(void); |
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72 | |
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73 | /** |
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74 | * @brief Starts the multitasking. |
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75 | * |
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76 | * This directive initiates multitasking and performs a context switch to the |
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77 | * first user application task and may enable interrupts as a side-effect of |
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78 | * that context switch. The context switch saves the executing context. The |
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79 | * application runs now. The directive rtems_shutdown_executive() will return |
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80 | * to the saved context. The exit() function will use this directive. |
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81 | * |
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82 | * After a return to the saved context a fatal system state is reached. The |
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83 | * fatal source is RTEMS_FATAL_SOURCE_EXIT with a fatal code set to the value |
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84 | * passed to rtems_shutdown_executive(). |
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85 | * |
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86 | * This directive does not return. |
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87 | */ |
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88 | void rtems_initialize_start_multitasking(void) |
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89 | RTEMS_COMPILER_NO_RETURN_ATTRIBUTE; |
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90 | |
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91 | /** |
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92 | * @brief Shutdown the RTEMS environment |
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93 | * |
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94 | * This routine implements the rtems_shutdown_executive directive. The |
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95 | * invocation of this directive results in the RTEMS environment being |
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96 | * shutdown and multitasking halted. From the application's perspective, |
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97 | * invocation of this directive results in the rtems_initialize_executive |
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98 | * directive exitting to the startup code which invoked it. |
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99 | */ |
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100 | void rtems_shutdown_executive( |
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101 | uint32_t result |
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102 | ) RTEMS_COMPILER_NO_RETURN_ATTRIBUTE; |
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103 | |
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104 | #ifdef __cplusplus |
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105 | } |
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106 | #endif |
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107 | |
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108 | #endif |
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109 | /* end of include file */ |
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