1 | /* |
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2 | * COPYRIGHT (c) 1989-1999. |
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3 | * On-Line Applications Research Corporation (OAR). |
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4 | * |
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5 | * The license and distribution terms for this file may be |
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6 | * found in the file LICENSE in this distribution or at |
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7 | * http://www.rtems.com/license/LICENSE. |
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8 | * |
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9 | * $Id$ |
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10 | */ |
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11 | |
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12 | #if HAVE_CONFIG_H |
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13 | #include "config.h" |
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14 | #endif |
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15 | |
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16 | #include <rtems/itron.h> |
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17 | |
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18 | #include <rtems/score/thread.h> |
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19 | #include <rtems/score/userext.h> |
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20 | #include <rtems/score/wkspace.h> |
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21 | #include <rtems/score/apiext.h> |
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22 | #include <rtems/score/sysstate.h> |
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23 | |
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24 | #include <rtems/itron/task.h> |
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25 | |
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26 | |
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27 | /* |
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28 | * cre_tsk - Create Task |
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29 | */ |
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30 | |
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31 | ER cre_tsk( |
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32 | ID tskid, |
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33 | T_CTSK *pk_ctsk |
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34 | ) |
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35 | { |
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36 | register Thread_Control *the_thread; |
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37 | boolean status; |
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38 | Priority_Control core_priority; |
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39 | |
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40 | /* |
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41 | * Validate Parameters. |
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42 | */ |
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43 | |
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44 | if ( pk_ctsk == NULL ) |
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45 | return E_PAR; |
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46 | |
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47 | if ((pk_ctsk->tskatr != TA_ASM ) && |
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48 | (pk_ctsk->tskatr != TA_HLNG) && |
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49 | (pk_ctsk->tskatr != TA_COP0) && |
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50 | (pk_ctsk->tskatr != TA_COP1) && |
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51 | (pk_ctsk->tskatr != TA_COP2) && |
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52 | (pk_ctsk->tskatr != TA_COP3) && |
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53 | (pk_ctsk->tskatr != TA_COP4) && |
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54 | (pk_ctsk->tskatr != TA_COP5) && |
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55 | (pk_ctsk->tskatr != TA_COP6) && |
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56 | (pk_ctsk->tskatr != TA_COP7)) |
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57 | return E_RSATR; |
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58 | |
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59 | if (( pk_ctsk->itskpri <= 0 ) || ( pk_ctsk->itskpri >= 256 )) |
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60 | return E_PAR; |
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61 | if ( pk_ctsk->task == NULL ) |
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62 | return E_PAR; |
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63 | if ( pk_ctsk->stksz < 0 ) |
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64 | return E_PAR; |
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65 | |
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66 | /* |
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67 | * Disable dispatching. |
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68 | */ |
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69 | |
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70 | _Thread_Disable_dispatch(); |
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71 | |
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72 | /* |
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73 | * allocate the thread. |
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74 | */ |
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75 | |
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76 | the_thread = _ITRON_Task_Allocate( tskid ); |
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77 | if ( !the_thread ) |
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78 | _ITRON_return_errorno( _ITRON_Task_Clarify_allocation_id_error( tskid ) ); |
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79 | |
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80 | /* |
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81 | * Initialize the core thread for this task. |
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82 | */ |
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83 | |
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84 | core_priority = _ITRON_Task_Priority_to_Core( pk_ctsk->itskpri ); |
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85 | status = _Thread_Initialize( |
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86 | &_ITRON_Task_Information, |
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87 | the_thread, |
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88 | NULL, |
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89 | pk_ctsk->stksz, |
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90 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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91 | TRUE, /* XXX - All tasks FP (if the HW supports it) for now */ |
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92 | #else |
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93 | FALSE, |
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94 | #endif |
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95 | core_priority, |
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96 | TRUE, /* preemptible */ |
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97 | THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE, |
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98 | NULL, /* no budget algorithm callout */ |
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99 | 0, |
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100 | NULL |
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101 | ); |
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102 | |
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103 | if ( !status ) { |
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104 | _ITRON_Task_Free( the_thread ); |
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105 | _ITRON_return_errorno( E_NOMEM ); |
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106 | } |
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107 | |
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108 | /* |
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109 | * This insures we evaluate the process-wide signals pending when we |
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110 | * first run. |
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111 | * |
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112 | * NOTE: Since the thread starts with all unblocked, this is necessary. |
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113 | */ |
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114 | |
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115 | the_thread->do_post_task_switch_extension = TRUE; |
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116 | |
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117 | the_thread->Start.entry_point = (Thread_Entry) pk_ctsk->task; |
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118 | |
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119 | _ITRON_return_errorno( E_OK ); |
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120 | } |
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