[5a58b1e] | 1 | /** |
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| 2 | * @file |
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[05df0a8] | 3 | * |
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[5a58b1e] | 4 | * @brief Initialize Thread |
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[e6c87f7] | 5 | * |
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[5a58b1e] | 6 | * @ingroup ScoreThread |
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| 7 | */ |
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| 8 | /* |
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[9db8705] | 9 | * COPYRIGHT (c) 1989-2014. |
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[05df0a8] | 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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[dcf3687] | 13 | * found in the file LICENSE in this distribution or at |
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[c499856] | 14 | * http://www.rtems.org/license/LICENSE. |
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[05df0a8] | 15 | */ |
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| 16 | |
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[a8eed23] | 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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[5618c37a] | 21 | #include <rtems/score/threadimpl.h> |
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[c6e21ee1] | 22 | #include <rtems/score/schedulerimpl.h> |
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[218286bc] | 23 | #include <rtems/score/stackimpl.h> |
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[022851a] | 24 | #include <rtems/score/tls.h> |
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[3be0c9a] | 25 | #include <rtems/score/userextimpl.h> |
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[4b48ece0] | 26 | #include <rtems/score/watchdogimpl.h> |
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[05df0a8] | 27 | #include <rtems/score/wkspace.h> |
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[9db8705] | 28 | #include <rtems/score/cpusetimpl.h> |
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[5618c37a] | 29 | #include <rtems/config.h> |
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[05df0a8] | 30 | |
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[484a769] | 31 | bool _Thread_Initialize( |
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[d7665823] | 32 | Thread_Information *information, |
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[05df0a8] | 33 | Thread_Control *the_thread, |
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[c5831a3f] | 34 | const Scheduler_Control *scheduler, |
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[05df0a8] | 35 | void *stack_area, |
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[728a0bd3] | 36 | size_t stack_size, |
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[484a769] | 37 | bool is_fp, |
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[05df0a8] | 38 | Priority_Control priority, |
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[484a769] | 39 | bool is_preemptible, |
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[05df0a8] | 40 | Thread_CPU_budget_algorithms budget_algorithm, |
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| 41 | Thread_CPU_budget_algorithm_callout budget_callout, |
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[3127180] | 42 | uint32_t isr_level, |
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[05df0a8] | 43 | Objects_Name name |
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| 44 | ) |
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| 45 | { |
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[bee71f8e] | 46 | uintptr_t tls_size = _TLS_Get_size(); |
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[69aa3349] | 47 | size_t actual_stack_size = 0; |
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| 48 | void *stack = NULL; |
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[cedfd802] | 49 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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[69aa3349] | 50 | void *fp_area = NULL; |
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[cedfd802] | 51 | #endif |
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[69aa3349] | 52 | bool extension_status; |
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| 53 | size_t i; |
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[df2177ab] | 54 | Scheduler_Node *scheduler_node; |
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[5d6b211] | 55 | #if defined(RTEMS_SMP) |
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| 56 | Scheduler_Node *scheduler_node_for_index; |
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| 57 | const Scheduler_Control *scheduler_for_index; |
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| 58 | #endif |
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| 59 | size_t scheduler_index; |
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[38b59a6] | 60 | Per_CPU_Control *cpu = _Per_CPU_Get_by_index( 0 ); |
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[95d0c98] | 61 | |
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[05e82bd7] | 62 | #if defined( RTEMS_SMP ) |
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[537f00eb] | 63 | if ( rtems_configuration_is_smp_enabled() ) { |
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| 64 | if ( !is_preemptible ) { |
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| 65 | return false; |
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| 66 | } |
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| 67 | |
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| 68 | if ( isr_level != 0 ) { |
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| 69 | return false; |
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| 70 | } |
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[05e82bd7] | 71 | } |
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| 72 | #endif |
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| 73 | |
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[54c3fbd] | 74 | memset( |
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| 75 | &the_thread->current_state, |
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| 76 | 0, |
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| 77 | information->Objects.size - offsetof( Thread_Control, current_state ) |
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| 78 | ); |
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| 79 | |
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[69aa3349] | 80 | for ( i = 0 ; i < _Thread_Control_add_on_count ; ++i ) { |
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| 81 | const Thread_Control_add_on *add_on = &_Thread_Control_add_ons[ i ]; |
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| 82 | |
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| 83 | *(void **) ( (char *) the_thread + add_on->destination_offset ) = |
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| 84 | (char *) the_thread + add_on->source_offset; |
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| 85 | } |
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| 86 | |
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[cedfd802] | 87 | /* |
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| 88 | * Allocate and Initialize the stack for this thread. |
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| 89 | */ |
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[bacf79e] | 90 | #if !defined(RTEMS_SCORE_THREAD_ENABLE_USER_PROVIDED_STACK_VIA_API) |
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[464ec0d] | 91 | actual_stack_size = _Thread_Stack_Allocate( the_thread, stack_size ); |
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[8a4a349e] | 92 | if ( !actual_stack_size || actual_stack_size < stack_size ) |
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[aae7f1a1] | 93 | return false; /* stack allocation failed */ |
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[05df0a8] | 94 | |
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| 95 | stack = the_thread->Start.stack; |
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[bacf79e] | 96 | #else |
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| 97 | if ( !stack_area ) { |
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| 98 | actual_stack_size = _Thread_Stack_Allocate( the_thread, stack_size ); |
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| 99 | if ( !actual_stack_size || actual_stack_size < stack_size ) |
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| 100 | return false; /* stack allocation failed */ |
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| 101 | |
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| 102 | stack = the_thread->Start.stack; |
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| 103 | the_thread->Start.core_allocated_stack = true; |
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| 104 | } else { |
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| 105 | stack = stack_area; |
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| 106 | actual_stack_size = stack_size; |
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| 107 | the_thread->Start.core_allocated_stack = false; |
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| 108 | } |
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| 109 | #endif |
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[05df0a8] | 110 | |
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| 111 | _Stack_Initialize( |
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| 112 | &the_thread->Start.Initial_stack, |
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| 113 | stack, |
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| 114 | actual_stack_size |
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| 115 | ); |
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| 116 | |
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[5d6b211] | 117 | scheduler_index = 0; |
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| 118 | |
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[022851a] | 119 | /* Thread-local storage (TLS) area allocation */ |
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| 120 | if ( tls_size > 0 ) { |
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| 121 | uintptr_t tls_align = _TLS_Heap_align_up( (uintptr_t) _TLS_Alignment ); |
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| 122 | uintptr_t tls_alloc = _TLS_Get_allocation_size( tls_size, tls_align ); |
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| 123 | |
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| 124 | the_thread->Start.tls_area = |
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| 125 | _Workspace_Allocate_aligned( tls_alloc, tls_align ); |
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| 126 | |
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| 127 | if ( the_thread->Start.tls_area == NULL ) { |
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| 128 | goto failed; |
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| 129 | } |
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| 130 | } |
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| 131 | |
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[05df0a8] | 132 | /* |
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| 133 | * Allocate the floating point area for this thread |
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| 134 | */ |
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[cedfd802] | 135 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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| 136 | if ( is_fp ) { |
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| 137 | fp_area = _Workspace_Allocate( CONTEXT_FP_SIZE ); |
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| 138 | if ( !fp_area ) |
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| 139 | goto failed; |
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[05df0a8] | 140 | } |
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[cedfd802] | 141 | the_thread->fp_context = fp_area; |
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| 142 | the_thread->Start.fp_context = fp_area; |
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| 143 | #endif |
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[05df0a8] | 144 | |
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[d7665823] | 145 | /* |
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| 146 | * Get thread queue heads |
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| 147 | */ |
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| 148 | the_thread->Wait.spare_heads = _Freechain_Get( |
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| 149 | &information->Free_thread_queue_heads, |
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| 150 | _Workspace_Allocate, |
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| 151 | _Objects_Extend_size( &information->Objects ), |
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[3995e6d] | 152 | THREAD_QUEUE_HEADS_SIZE( _Scheduler_Count ) |
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[d7665823] | 153 | ); |
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| 154 | if ( the_thread->Wait.spare_heads == NULL ) { |
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| 155 | goto failed; |
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| 156 | } |
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[3995e6d] | 157 | _Thread_queue_Heads_initialize( the_thread->Wait.spare_heads ); |
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[d7665823] | 158 | |
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[05df0a8] | 159 | /* |
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| 160 | * General initialization |
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| 161 | */ |
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| 162 | |
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[335e5ca] | 163 | the_thread->is_fp = is_fp; |
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[2d36931] | 164 | the_thread->Start.isr_level = isr_level; |
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[05df0a8] | 165 | the_thread->Start.is_preemptible = is_preemptible; |
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| 166 | the_thread->Start.budget_algorithm = budget_algorithm; |
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| 167 | the_thread->Start.budget_callout = budget_callout; |
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[f94e76ba] | 168 | |
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[16832b0] | 169 | _Thread_Timer_initialize( &the_thread->Timer, cpu ); |
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[03b900d] | 170 | |
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[f94e76ba] | 171 | switch ( budget_algorithm ) { |
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| 172 | case THREAD_CPU_BUDGET_ALGORITHM_NONE: |
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| 173 | case THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE: |
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| 174 | break; |
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[442eac69] | 175 | #if defined(RTEMS_SCORE_THREAD_ENABLE_EXHAUST_TIMESLICE) |
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| 176 | case THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE: |
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[e785fbaa] | 177 | the_thread->cpu_time_budget = |
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| 178 | rtems_configuration_get_ticks_per_timeslice(); |
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[442eac69] | 179 | break; |
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| 180 | #endif |
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| 181 | #if defined(RTEMS_SCORE_THREAD_ENABLE_SCHEDULER_CALLOUT) |
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| 182 | case THREAD_CPU_BUDGET_ALGORITHM_CALLOUT: |
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| 183 | break; |
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| 184 | #endif |
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[f94e76ba] | 185 | } |
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| 186 | |
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[5d6b211] | 187 | #if defined(RTEMS_SMP) |
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| 188 | scheduler_node_for_index = the_thread->Scheduler.nodes; |
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| 189 | scheduler_for_index = &_Scheduler_Table[ 0 ]; |
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| 190 | |
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| 191 | while ( scheduler_index < _Scheduler_Count ) { |
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| 192 | Priority_Control priority_for_index; |
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| 193 | |
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| 194 | if ( scheduler_for_index == scheduler ) { |
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| 195 | priority_for_index = priority; |
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| 196 | scheduler_node = scheduler_node_for_index; |
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| 197 | } else { |
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[05ca53d] | 198 | /* |
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| 199 | * Use the idle thread priority for the non-home scheduler instances by |
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| 200 | * default. |
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| 201 | */ |
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| 202 | priority_for_index = _Scheduler_Map_priority( |
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| 203 | scheduler_for_index, |
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| 204 | scheduler_for_index->maximum_priority |
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| 205 | ); |
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[5d6b211] | 206 | } |
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| 207 | |
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| 208 | _Scheduler_Node_initialize( |
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| 209 | scheduler_for_index, |
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| 210 | scheduler_node_for_index, |
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| 211 | the_thread, |
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| 212 | priority_for_index |
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| 213 | ); |
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| 214 | scheduler_node_for_index = (Scheduler_Node *) |
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| 215 | ( (uintptr_t) scheduler_node_for_index + _Scheduler_Node_size ); |
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| 216 | ++scheduler_for_index; |
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| 217 | ++scheduler_index; |
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| 218 | } |
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[266d383] | 219 | |
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| 220 | _Chain_Initialize_one( |
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| 221 | &the_thread->Scheduler.Wait_nodes, |
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| 222 | &scheduler_node->Thread.Wait_node |
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| 223 | ); |
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[ebdd2a3] | 224 | _Chain_Initialize_one( |
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| 225 | &the_thread->Scheduler.Scheduler_nodes, |
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| 226 | &scheduler_node->Thread.Scheduler_node.Chain |
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| 227 | ); |
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[5d6b211] | 228 | #else |
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[7f742432] | 229 | scheduler_node = _Thread_Scheduler_get_home_node( the_thread ); |
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[5d6b211] | 230 | _Scheduler_Node_initialize( |
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| 231 | scheduler, |
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| 232 | scheduler_node, |
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| 233 | the_thread, |
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| 234 | priority |
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| 235 | ); |
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| 236 | scheduler_index = 1; |
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| 237 | #endif |
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| 238 | |
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| 239 | _Priority_Node_initialize( &the_thread->Real_priority, priority ); |
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| 240 | _Priority_Initialize_one( |
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| 241 | &scheduler_node->Wait.Priority, |
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| 242 | &the_thread->Real_priority |
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| 243 | ); |
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[df2177ab] | 244 | |
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[a936aa49] | 245 | #if defined(RTEMS_SMP) |
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[54c3fbd] | 246 | RTEMS_STATIC_ASSERT( THREAD_SCHEDULER_BLOCKED == 0, Scheduler_state ); |
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[2dd098a] | 247 | the_thread->Scheduler.home = scheduler; |
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[07a32d19] | 248 | _ISR_lock_Initialize( &the_thread->Scheduler.Lock, "Thread Scheduler" ); |
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[4e02681] | 249 | _ISR_lock_Initialize( &the_thread->Wait.Lock.Default, "Thread Wait Default" ); |
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[ff2e6c64] | 250 | _Thread_queue_Gate_open( &the_thread->Wait.Lock.Tranquilizer ); |
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[aaaf9610] | 251 | _RBTree_Initialize_node( &the_thread->Wait.Link.Registry_node ); |
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[10e32a26] | 252 | _SMP_lock_Stats_initialize( &the_thread->Potpourri_stats, "Thread Potpourri" ); |
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[a936aa49] | 253 | #endif |
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| 254 | |
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[a5ac9da] | 255 | /* Initialize the CPU for the non-SMP schedulers */ |
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[38b59a6] | 256 | _Thread_Set_CPU( the_thread, cpu ); |
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[a5ac9da] | 257 | |
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[6e4f929] | 258 | _Thread_queue_Initialize( &the_thread->Join_queue ); |
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| 259 | |
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[c3330a8] | 260 | the_thread->current_state = STATES_DORMANT; |
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[568af83] | 261 | the_thread->Wait.operations = &_Thread_queue_Operations_default; |
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[c3330a8] | 262 | the_thread->Start.initial_priority = priority; |
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[69aa3349] | 263 | |
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[54c3fbd] | 264 | RTEMS_STATIC_ASSERT( THREAD_WAIT_FLAGS_INITIAL == 0, Wait_flags ); |
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[4c8a0ac] | 265 | |
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[5eaf0e7] | 266 | /* POSIX Keys */ |
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| 267 | _RBTree_Initialize_empty( &the_thread->Keys.Key_value_pairs ); |
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| 268 | _ISR_lock_Initialize( &the_thread->Keys.Lock, "POSIX Key Value Pairs" ); |
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[e6c87f7] | 269 | |
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[0dd732d] | 270 | _Thread_Action_control_initialize( &the_thread->Post_switch_actions ); |
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| 271 | |
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[05df0a8] | 272 | /* |
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| 273 | * Open the object |
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| 274 | */ |
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[d7665823] | 275 | _Objects_Open( &information->Objects, &the_thread->Object, name ); |
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[05df0a8] | 276 | |
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| 277 | /* |
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[5088d97] | 278 | * We assume the Allocator Mutex is locked and dispatching is |
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| 279 | * enabled when we get here. We want to be able to run the |
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[28352fae] | 280 | * user extensions with dispatching enabled. The Allocator |
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[5088d97] | 281 | * Mutex provides sufficient protection to let the user extensions |
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| 282 | * run safely. |
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[05df0a8] | 283 | */ |
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[5088d97] | 284 | extension_status = _User_extensions_Thread_create( the_thread ); |
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[cedfd802] | 285 | if ( extension_status ) |
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| 286 | return true; |
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[05df0a8] | 287 | |
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[cedfd802] | 288 | failed: |
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[05df0a8] | 289 | |
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[5d6b211] | 290 | #if defined(RTEMS_SMP) |
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| 291 | while ( scheduler_index > 0 ) { |
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| 292 | scheduler_node_for_index = (Scheduler_Node *) |
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| 293 | ( (uintptr_t) scheduler_node_for_index - _Scheduler_Node_size ); |
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| 294 | --scheduler_for_index; |
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| 295 | --scheduler_index; |
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| 296 | _Scheduler_Node_destroy( scheduler_for_index, scheduler_node_for_index ); |
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| 297 | } |
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| 298 | #else |
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| 299 | if ( scheduler_index > 0 ) { |
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[df2177ab] | 300 | _Scheduler_Node_destroy( scheduler, scheduler_node ); |
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[69aa3349] | 301 | } |
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[5d6b211] | 302 | #endif |
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[28352fae] | 303 | |
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[69aa3349] | 304 | _Workspace_Free( the_thread->Start.tls_area ); |
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[05df0a8] | 305 | |
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[d7665823] | 306 | _Freechain_Put( |
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| 307 | &information->Free_thread_queue_heads, |
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| 308 | the_thread->Wait.spare_heads |
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| 309 | ); |
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| 310 | |
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[cedfd802] | 311 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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[a0323a9f] | 312 | _Workspace_Free( fp_area ); |
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[cedfd802] | 313 | #endif |
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[05df0a8] | 314 | |
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[cedfd802] | 315 | _Thread_Stack_Free( the_thread ); |
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| 316 | return false; |
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[05df0a8] | 317 | } |
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