1 | /* |
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2 | * Thread Handler |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in found in the file LICENSE in this distribution or at |
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10 | * http://www.OARcorp.com/rtems/license.html. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #include <rtems/system.h> |
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16 | #include <rtems/score/apiext.h> |
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17 | #include <rtems/score/context.h> |
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18 | #include <rtems/score/interr.h> |
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19 | #include <rtems/score/isr.h> |
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20 | #include <rtems/score/object.h> |
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21 | #include <rtems/score/priority.h> |
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22 | #include <rtems/score/states.h> |
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23 | #include <rtems/score/sysstate.h> |
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24 | #include <rtems/score/thread.h> |
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25 | #include <rtems/score/threadq.h> |
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26 | #include <rtems/score/userext.h> |
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27 | #include <rtems/score/wkspace.h> |
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28 | |
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29 | /*PAGE |
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30 | * |
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31 | * _Thread_Handler_initialization |
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32 | * |
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33 | * This routine initializes all thread manager related data structures. |
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34 | * |
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35 | * Input parameters: |
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36 | * ticks_per_timeslice - clock ticks per quantum |
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37 | * maximum_proxies - number of proxies to initialize |
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38 | * |
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39 | * Output parameters: NONE |
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40 | */ |
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41 | |
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42 | void _Thread_Handler_initialization( |
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43 | unsigned32 ticks_per_timeslice, |
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44 | unsigned32 maximum_extensions, |
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45 | unsigned32 maximum_proxies |
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46 | ) |
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47 | { |
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48 | unsigned32 index; |
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49 | |
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50 | /* |
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51 | * BOTH stacks hooks must be set or both must be NULL. |
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52 | * Do not allow mixture. |
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53 | */ |
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54 | |
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55 | if ( !( ( _CPU_Table.stack_allocate_hook == 0 ) |
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56 | == ( _CPU_Table.stack_free_hook == 0 ) ) ) |
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57 | _Internal_error_Occurred( |
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58 | INTERNAL_ERROR_CORE, |
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59 | TRUE, |
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60 | INTERNAL_ERROR_BAD_STACK_HOOK |
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61 | ); |
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62 | |
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63 | _Context_Switch_necessary = FALSE; |
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64 | _Thread_Executing = NULL; |
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65 | _Thread_Heir = NULL; |
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66 | _Thread_Allocated_fp = NULL; |
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67 | |
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68 | _Thread_Do_post_task_switch_extension = 0; |
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69 | |
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70 | _Thread_Maximum_extensions = maximum_extensions; |
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71 | |
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72 | _Thread_Ticks_per_timeslice = ticks_per_timeslice; |
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73 | |
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74 | _Thread_Ready_chain = (Chain_Control *) _Workspace_Allocate_or_fatal_error( |
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75 | (PRIORITY_MAXIMUM + 1) * sizeof(Chain_Control) |
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76 | ); |
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77 | |
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78 | for ( index=0; index <= PRIORITY_MAXIMUM ; index++ ) |
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79 | _Chain_Initialize_empty( &_Thread_Ready_chain[ index ] ); |
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80 | |
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81 | #if defined(RTEMS_MULTIPROCESSING) |
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82 | _Thread_MP_Handler_initialization( maximum_proxies ); |
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83 | #endif |
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84 | |
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85 | /* |
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86 | * Initialize this class of objects. |
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87 | */ |
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88 | |
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89 | _Objects_Initialize_information( |
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90 | &_Thread_Internal_information, |
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91 | OBJECTS_INTERNAL_THREADS, |
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92 | FALSE, |
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93 | ( _System_state_Is_multiprocessing ) ? 2 : 1, |
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94 | sizeof( Thread_Control ), |
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95 | TRUE, |
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96 | 8, |
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97 | TRUE |
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98 | ); |
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99 | |
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100 | } |
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101 | |
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