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https://gitlab.rtems.org/rtems/rtos/rtems.git
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Joel Sherrill
17508d02bb
a BSP (c4xsim) supporting the simulator included with gdb. This port was done by Joel Sherrill and Jennifer Averett of OAR Corporation. Also included with this port is a space/time optimization to eliminate FP context switch management on CPUs without hardware or software FP. An issue with this port was that sizeof(unsigned32) = sizeof(unsigned8) on this CPU. This required addressing alignment checks and assumptions as well as fixing code that assumed sizeof(unsigned32) == 4.
121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
/*
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#include <itron.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/userext.h>
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#include <rtems/score/wkspace.h>
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#include <rtems/score/apiext.h>
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#include <rtems/score/sysstate.h>
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#include <rtems/itron/task.h>
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/*
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* cre_tsk - Create Task
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*/
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ER cre_tsk(
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ID tskid,
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T_CTSK *pk_ctsk
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)
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{
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register Thread_Control *the_thread;
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boolean status;
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Priority_Control core_priority;
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/*
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* Validate Parameters.
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*/
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if ( pk_ctsk == NULL )
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return E_PAR;
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if ((pk_ctsk->tskatr != TA_ASM ) &&
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(pk_ctsk->tskatr != TA_HLNG) &&
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(pk_ctsk->tskatr != TA_COP0) &&
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(pk_ctsk->tskatr != TA_COP1) &&
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(pk_ctsk->tskatr != TA_COP2) &&
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(pk_ctsk->tskatr != TA_COP3) &&
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(pk_ctsk->tskatr != TA_COP4) &&
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(pk_ctsk->tskatr != TA_COP5) &&
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(pk_ctsk->tskatr != TA_COP6) &&
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(pk_ctsk->tskatr != TA_COP7))
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return E_RSATR;
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if (( pk_ctsk->itskpri <= 0 ) || ( pk_ctsk->itskpri >= 256 ))
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return E_PAR;
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if ( pk_ctsk->task == NULL )
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return E_PAR;
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if ( pk_ctsk->stksz < 0 )
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return E_PAR;
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/*
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* Disable dispatching.
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*/
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_Thread_Disable_dispatch();
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/*
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* allocate the thread.
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*/
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the_thread = _ITRON_Task_Allocate( tskid );
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if ( !the_thread )
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_ITRON_return_errorno( _ITRON_Task_Clarify_allocation_id_error( tskid ) );
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/*
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* Initialize the core thread for this task.
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*/
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core_priority = _ITRON_Task_Priority_to_Core( pk_ctsk->itskpri );
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status = _Thread_Initialize(
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&_ITRON_Task_Information,
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the_thread,
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NULL,
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pk_ctsk->stksz,
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#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
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TRUE, /* XXX - All tasks FP (if the HW supports it) for now */
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#else
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FALSE,
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#endif
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core_priority,
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TRUE, /* preemptible */
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THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE,
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NULL, /* no budget algorithm callout */
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0,
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NULL
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);
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if ( !status ) {
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_ITRON_Task_Free( the_thread );
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_ITRON_return_errorno( E_NOMEM );
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}
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/*
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* This insures we evaluate the process-wide signals pending when we
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* first run.
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*
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* NOTE: Since the thread starts with all unblocked, this is necessary.
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*/
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the_thread->do_post_task_switch_extension = TRUE;
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the_thread->Start.entry_point = (Thread_Entry) pk_ctsk->task;
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_ITRON_return_errorno( E_OK );
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}
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