[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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| 5 | * @ingroup ScoreThread |
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| 6 | */ |
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| 7 | /* |
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[010192d] | 8 | * COPYRIGHT (c) 1989-2011. |
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[05df0a8] | 9 | * On-Line Applications Research Corporation (OAR). |
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| 10 | * |
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| 11 | * The license and distribution terms for this file may be |
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[dcf3687] | 12 | * found in the file LICENSE in this distribution or at |
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[dd687d97] | 13 | * http://www.rtems.com/license/LICENSE. |
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[05df0a8] | 14 | */ |
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| 15 | |
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[a8eed23] | 16 | #if HAVE_CONFIG_H |
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| 17 | #include "config.h" |
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| 18 | #endif |
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| 19 | |
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[5618c37a] | 20 | #include <rtems/score/threadimpl.h> |
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[c6e21ee1] | 21 | #include <rtems/score/schedulerimpl.h> |
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[218286bc] | 22 | #include <rtems/score/stackimpl.h> |
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[022851a] | 23 | #include <rtems/score/tls.h> |
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[3be0c9a] | 24 | #include <rtems/score/userextimpl.h> |
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[4b48ece0] | 25 | #include <rtems/score/watchdogimpl.h> |
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[05df0a8] | 26 | #include <rtems/score/wkspace.h> |
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[5618c37a] | 27 | #include <rtems/config.h> |
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[05df0a8] | 28 | |
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[484a769] | 29 | bool _Thread_Initialize( |
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[05df0a8] | 30 | Objects_Information *information, |
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| 31 | Thread_Control *the_thread, |
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| 32 | void *stack_area, |
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[728a0bd3] | 33 | size_t stack_size, |
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[484a769] | 34 | bool is_fp, |
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[05df0a8] | 35 | Priority_Control priority, |
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[484a769] | 36 | bool is_preemptible, |
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[05df0a8] | 37 | Thread_CPU_budget_algorithms budget_algorithm, |
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| 38 | Thread_CPU_budget_algorithm_callout budget_callout, |
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[3127180] | 39 | uint32_t isr_level, |
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[05df0a8] | 40 | Objects_Name name |
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| 41 | ) |
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| 42 | { |
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[95d0c98] | 43 | size_t actual_stack_size = 0; |
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| 44 | void *stack = NULL; |
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[cedfd802] | 45 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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[95d0c98] | 46 | void *fp_area; |
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[cedfd802] | 47 | #endif |
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[95d0c98] | 48 | void *sched = NULL; |
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| 49 | void *extensions_area; |
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| 50 | bool extension_status; |
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| 51 | int i; |
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| 52 | |
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| 53 | /* |
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| 54 | * Do not use _TLS_Size here since this will lead GCC to assume that this |
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| 55 | * symbol is not 0 and the later > 0 test will be optimized away. |
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| 56 | */ |
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| 57 | uintptr_t tls_size = (uintptr_t) _TLS_BSS_end - (uintptr_t) _TLS_Data_begin; |
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[05df0a8] | 58 | |
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[05e82bd7] | 59 | #if defined( RTEMS_SMP ) |
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| 60 | if ( rtems_configuration_is_smp_enabled() && !is_preemptible ) { |
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| 61 | return false; |
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| 62 | } |
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| 63 | #endif |
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| 64 | |
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[05df0a8] | 65 | /* |
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| 66 | * Initialize the Ada self pointer |
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| 67 | */ |
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[cedfd802] | 68 | #if __RTEMS_ADA__ |
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| 69 | the_thread->rtems_ada_self = NULL; |
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| 70 | #endif |
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[05df0a8] | 71 | |
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| 72 | /* |
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[cedfd802] | 73 | * Zero out all the allocated memory fields |
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[05df0a8] | 74 | */ |
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[cedfd802] | 75 | for ( i=0 ; i <= THREAD_API_LAST ; i++ ) |
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| 76 | the_thread->API_Extensions[i] = NULL; |
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[05df0a8] | 77 | |
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[cedfd802] | 78 | extensions_area = NULL; |
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| 79 | the_thread->libc_reent = NULL; |
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[022851a] | 80 | the_thread->Start.tls_area = NULL; |
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[05df0a8] | 81 | |
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[cedfd802] | 82 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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| 83 | fp_area = NULL; |
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| 84 | #endif |
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[ecf0f4c] | 85 | |
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[cedfd802] | 86 | /* |
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| 87 | * Allocate and Initialize the stack for this thread. |
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| 88 | */ |
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[bacf79e] | 89 | #if !defined(RTEMS_SCORE_THREAD_ENABLE_USER_PROVIDED_STACK_VIA_API) |
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[464ec0d] | 90 | actual_stack_size = _Thread_Stack_Allocate( the_thread, stack_size ); |
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[8a4a349e] | 91 | if ( !actual_stack_size || actual_stack_size < stack_size ) |
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[aae7f1a1] | 92 | return false; /* stack allocation failed */ |
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[05df0a8] | 93 | |
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| 94 | stack = the_thread->Start.stack; |
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[bacf79e] | 95 | #else |
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| 96 | if ( !stack_area ) { |
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| 97 | actual_stack_size = _Thread_Stack_Allocate( the_thread, stack_size ); |
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| 98 | if ( !actual_stack_size || actual_stack_size < stack_size ) |
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| 99 | return false; /* stack allocation failed */ |
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| 100 | |
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| 101 | stack = the_thread->Start.stack; |
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| 102 | the_thread->Start.core_allocated_stack = true; |
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| 103 | } else { |
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| 104 | stack = stack_area; |
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| 105 | actual_stack_size = stack_size; |
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| 106 | the_thread->Start.core_allocated_stack = false; |
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| 107 | } |
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| 108 | #endif |
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[05df0a8] | 109 | |
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| 110 | _Stack_Initialize( |
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| 111 | &the_thread->Start.Initial_stack, |
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| 112 | stack, |
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| 113 | actual_stack_size |
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| 114 | ); |
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| 115 | |
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[022851a] | 116 | /* Thread-local storage (TLS) area allocation */ |
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| 117 | if ( tls_size > 0 ) { |
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| 118 | uintptr_t tls_align = _TLS_Heap_align_up( (uintptr_t) _TLS_Alignment ); |
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| 119 | uintptr_t tls_alloc = _TLS_Get_allocation_size( tls_size, tls_align ); |
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| 120 | |
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| 121 | the_thread->Start.tls_area = |
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| 122 | _Workspace_Allocate_aligned( tls_alloc, tls_align ); |
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| 123 | |
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| 124 | if ( the_thread->Start.tls_area == NULL ) { |
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| 125 | goto failed; |
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| 126 | } |
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| 127 | } |
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| 128 | |
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[05df0a8] | 129 | /* |
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| 130 | * Allocate the floating point area for this thread |
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| 131 | */ |
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[cedfd802] | 132 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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| 133 | if ( is_fp ) { |
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| 134 | fp_area = _Workspace_Allocate( CONTEXT_FP_SIZE ); |
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| 135 | if ( !fp_area ) |
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| 136 | goto failed; |
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| 137 | fp_area = _Context_Fp_start( fp_area, 0 ); |
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[05df0a8] | 138 | } |
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[cedfd802] | 139 | the_thread->fp_context = fp_area; |
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| 140 | the_thread->Start.fp_context = fp_area; |
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| 141 | #endif |
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[05df0a8] | 142 | |
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[bdffb59] | 143 | /* |
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| 144 | * Initialize the thread timer |
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| 145 | */ |
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| 146 | _Watchdog_Initialize( &the_thread->Timer, NULL, 0, NULL ); |
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| 147 | |
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[cedfd802] | 148 | #ifdef __RTEMS_STRICT_ORDER_MUTEX__ |
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| 149 | /* Initialize the head of chain of held mutexes */ |
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| 150 | _Chain_Initialize_empty(&the_thread->lock_mutex); |
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| 151 | #endif |
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[05279b84] | 152 | |
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[05df0a8] | 153 | /* |
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| 154 | * Allocate the extensions area for this thread |
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| 155 | */ |
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| 156 | if ( _Thread_Maximum_extensions ) { |
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| 157 | extensions_area = _Workspace_Allocate( |
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| 158 | (_Thread_Maximum_extensions + 1) * sizeof( void * ) |
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| 159 | ); |
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[cedfd802] | 160 | if ( !extensions_area ) |
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| 161 | goto failed; |
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| 162 | } |
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[05df0a8] | 163 | the_thread->extensions = (void **) extensions_area; |
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| 164 | |
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[f918e74] | 165 | /* |
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| 166 | * Clear the extensions area so extension users can determine |
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| 167 | * if they are linked to the thread. An extension user may |
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| 168 | * create the extension long after tasks have been created |
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| 169 | * so they cannot rely on the thread create user extension |
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| 170 | * call. |
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| 171 | */ |
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| 172 | if ( the_thread->extensions ) { |
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[cedfd802] | 173 | for ( i = 0; i <= _Thread_Maximum_extensions ; i++ ) |
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[f918e74] | 174 | the_thread->extensions[i] = NULL; |
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| 175 | } |
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| 176 | |
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[05df0a8] | 177 | /* |
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| 178 | * General initialization |
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| 179 | */ |
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| 180 | |
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| 181 | the_thread->Start.is_preemptible = is_preemptible; |
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| 182 | the_thread->Start.budget_algorithm = budget_algorithm; |
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| 183 | the_thread->Start.budget_callout = budget_callout; |
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[f94e76ba] | 184 | |
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| 185 | switch ( budget_algorithm ) { |
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| 186 | case THREAD_CPU_BUDGET_ALGORITHM_NONE: |
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| 187 | case THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE: |
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| 188 | break; |
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[442eac69] | 189 | #if defined(RTEMS_SCORE_THREAD_ENABLE_EXHAUST_TIMESLICE) |
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| 190 | case THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE: |
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| 191 | the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice; |
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| 192 | break; |
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| 193 | #endif |
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| 194 | #if defined(RTEMS_SCORE_THREAD_ENABLE_SCHEDULER_CALLOUT) |
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| 195 | case THREAD_CPU_BUDGET_ALGORITHM_CALLOUT: |
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| 196 | break; |
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| 197 | #endif |
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[f94e76ba] | 198 | } |
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| 199 | |
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[c3330a8] | 200 | the_thread->Start.isr_level = isr_level; |
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| 201 | |
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[a936aa49] | 202 | #if defined(RTEMS_SMP) |
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| 203 | the_thread->is_scheduled = false; |
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[aea4a91] | 204 | the_thread->is_in_the_air = false; |
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[a936aa49] | 205 | the_thread->is_executing = false; |
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[d5ef7ae2] | 206 | |
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| 207 | /* Initialize the cpu field for the non-SMP schedulers */ |
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| 208 | the_thread->cpu = _Per_CPU_Get_by_index( 0 ); |
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[a936aa49] | 209 | #endif |
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| 210 | |
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[c3330a8] | 211 | the_thread->current_state = STATES_DORMANT; |
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| 212 | the_thread->Wait.queue = NULL; |
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| 213 | the_thread->resource_count = 0; |
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| 214 | the_thread->real_priority = priority; |
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| 215 | the_thread->Start.initial_priority = priority; |
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[108c4b0] | 216 | sched =_Scheduler_Allocate( the_thread ); |
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[0faa9dad] | 217 | if ( !sched ) |
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| 218 | goto failed; |
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[c3330a8] | 219 | _Thread_Set_priority( the_thread, priority ); |
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[05df0a8] | 220 | |
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[c3330a8] | 221 | /* |
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| 222 | * Initialize the CPU usage statistics |
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| 223 | */ |
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[c6f7e060] | 224 | #ifndef __RTEMS_USE_TICKS_FOR_STATISTICS__ |
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[c16bcc0] | 225 | _Timestamp_Set_to_zero( &the_thread->cpu_time_used ); |
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[c3330a8] | 226 | #else |
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[c6f7e060] | 227 | the_thread->cpu_time_used = 0; |
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[c3330a8] | 228 | #endif |
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[05df0a8] | 229 | |
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| 230 | /* |
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| 231 | * Open the object |
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| 232 | */ |
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| 233 | _Objects_Open( information, &the_thread->Object, name ); |
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| 234 | |
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| 235 | /* |
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[5088d97] | 236 | * We assume the Allocator Mutex is locked and dispatching is |
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| 237 | * enabled when we get here. We want to be able to run the |
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[28352fae] | 238 | * user extensions with dispatching enabled. The Allocator |
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[5088d97] | 239 | * Mutex provides sufficient protection to let the user extensions |
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| 240 | * run safely. |
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[05df0a8] | 241 | */ |
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[5088d97] | 242 | extension_status = _User_extensions_Thread_create( the_thread ); |
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[cedfd802] | 243 | if ( extension_status ) |
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| 244 | return true; |
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[05df0a8] | 245 | |
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[cedfd802] | 246 | failed: |
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[022851a] | 247 | _Workspace_Free( the_thread->Start.tls_area ); |
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| 248 | |
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[a0323a9f] | 249 | _Workspace_Free( the_thread->libc_reent ); |
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[05df0a8] | 250 | |
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[cedfd802] | 251 | for ( i=0 ; i <= THREAD_API_LAST ; i++ ) |
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[a0323a9f] | 252 | _Workspace_Free( the_thread->API_Extensions[i] ); |
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[28352fae] | 253 | |
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[a0323a9f] | 254 | _Workspace_Free( extensions_area ); |
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[05df0a8] | 255 | |
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[cedfd802] | 256 | #if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE ) |
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[a0323a9f] | 257 | _Workspace_Free( fp_area ); |
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[cedfd802] | 258 | #endif |
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[05df0a8] | 259 | |
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[a0323a9f] | 260 | _Workspace_Free( sched ); |
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[0faa9dad] | 261 | |
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[cedfd802] | 262 | _Thread_Stack_Free( the_thread ); |
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| 263 | return false; |
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[05df0a8] | 264 | } |
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