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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [tests/] [tmtests/] [tm27/] [task1.c] - Rev 30
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/* * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: task1.c,v 1.2 2001-09-27 12:02:44 chris Exp $ */ /* * WARNING!!!!!!!!! * * THIS TEST USES INTERNAL RTEMS VARIABLES!!! */ #define TEST_INIT #define RTEMS_TM27 #include "system.h" #include <bsp.h> rtems_task Task_1( rtems_task_argument argument ); rtems_task Task_2( rtems_task_argument argument ); volatile rtems_unsigned32 Interrupt_occurred; volatile rtems_unsigned32 Interrupt_enter_time, Interrupt_enter_nested_time; volatile rtems_unsigned32 Interrupt_return_time, Interrupt_return_nested_time; rtems_unsigned32 Interrupt_nest; rtems_isr Isr_handler( rtems_vector_number vector ); rtems_task Init( rtems_task_argument argument ) { rtems_status_code status; Print_Warning(); puts( "\n\n*** TIME TEST 27 ***" ); status = rtems_task_create( rtems_build_name( 'T', 'A', '1', ' ' ), 254, RTEMS_MINIMUM_STACK_SIZE, RTEMS_DEFAULT_MODES, RTEMS_DEFAULT_ATTRIBUTES, &Task_id[ 1 ] ); directive_failed( status, "rtems_task_create Task_1" ); status = rtems_task_start( Task_id[ 1 ], Task_1, 0 ); directive_failed( status, "rtems_task_start Task_1" ); status = rtems_task_create( rtems_build_name( 'T', 'A', '2', ' ' ), 254, RTEMS_MINIMUM_STACK_SIZE, RTEMS_DEFAULT_MODES, RTEMS_DEFAULT_ATTRIBUTES, &Task_id[ 2 ] ); directive_failed( status, "rtems_task_create of Task_2" ); status = rtems_task_start( Task_id[ 2 ], Task_2, 0 ); directive_failed( status, "rtems_task_start of Task_2" ); status = rtems_task_delete( RTEMS_SELF ); directive_failed( status, "rtems_task_delete of RTEMS_SELF" ); } rtems_task Task_1( rtems_task_argument argument ) { Install_tm27_vector( Isr_handler ); /* * No preempt .. no nesting */ Interrupt_nest = 0; _Thread_Dispatch_disable_level = 0; Interrupt_occurred = 0; Timer_initialize(); Cause_tm27_intr(); /* goes to Isr_handler */ #if (MUST_WAIT_FOR_INTERRUPT == 1) while ( Interrupt_occurred == 0 ); #endif Interrupt_return_time = Read_timer(); put_time( "interrupt entry overhead: returns to interrupted task", Interrupt_enter_time, 1, 0, 0 ); put_time( "interrupt exit overhead: returns to interrupted task", Interrupt_return_time, 1, 0, 0 ); /* * No preempt .. nested */ _Thread_Dispatch_disable_level = 1; Interrupt_nest = 1; Interrupt_occurred = 0; Timer_initialize(); Cause_tm27_intr(); /* goes to Isr_handler */ #if (MUST_WAIT_FOR_INTERRUPT == 1) while ( Interrupt_occurred == 0 ); #endif Interrupt_return_time = Read_timer(); put_time( "interrupt entry overhead: returns to nested interrupt", Interrupt_enter_nested_time, 1, 0, 0 ); put_time( "interrupt exit overhead: returns to nested interrupt", Interrupt_return_nested_time, 1, 0, 0 ); /* * Does a preempt .. not nested */ _Thread_Dispatch_disable_level = 0; _Thread_Heir = (rtems_tcb *) _Thread_Ready_chain[254].last; _Context_Switch_necessary = 1; Interrupt_occurred = 0; Timer_initialize(); Cause_tm27_intr(); /* * goes to Isr_handler and then returns */ puts( "*** END OF TEST 27 ***" ); exit( 0 ); } /* * NOTE: When this task is executing, some of the assumptions made * regarding the placement of the currently executing task's TCB * on the ready chains have been violated. At least the assumption * that this task is at the head of the chain for its priority * has been violated. */ rtems_task Task_2( rtems_task_argument argument ) { #if (MUST_WAIT_FOR_INTERRUPT == 1) while ( Interrupt_occurred == 0 ); #endif end_time = Read_timer(); put_time( "interrupt entry overhead: returns to preempting task", Interrupt_enter_time, 1, 0, 0 ); put_time( "interrupt exit overhead: returns to preempting task", end_time, 1, 0, 0 ); fflush( stdout ); /* * Switch back to the other task to exit the test. */ _Thread_Dispatch_disable_level = 0; _Thread_Heir = (rtems_tcb *) _Thread_Ready_chain[254].first; _Context_Switch_necessary = 1; _Thread_Dispatch(); } /* The Isr_handler() and Isr_handler_inner() routines are structured * so that there will be as little entry overhead as possible included * in the interrupt entry time. */ void Isr_handler_inner( void ); rtems_isr Isr_handler( rtems_vector_number vector ) { end_time = Read_timer(); Interrupt_occurred = 1; Isr_handler_inner(); } void Isr_handler_inner( void ) { /*enable_tracing();*/ Clear_tm27_intr(); switch ( Interrupt_nest ) { case 0: Interrupt_enter_time = end_time; break; case 1: Interrupt_enter_time = end_time; Interrupt_nest = 2; Interrupt_occurred = 0; Lower_tm27_intr(); Timer_initialize(); Cause_tm27_intr(); /* goes to a nested copy of Isr_handler */ #if (MUST_WAIT_FOR_INTERRUPT == 1) while ( Interrupt_occurred == 0 ); #endif Interrupt_return_nested_time = Read_timer(); break; case 2: Interrupt_enter_nested_time = end_time; break; } Timer_initialize(); }
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