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phoenix |
//===========================================================================
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//
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// uit_func.cxx
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//
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// uITRON compatibility functions
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//
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//===========================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//===========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): hmt
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// Contributors: hmt
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// Date: 1998-03-13
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// Purpose: uITRON compatibility functions
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// Description:
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//
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//####DESCRIPTIONEND####
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//
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//===========================================================================
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#include <pkgconf/uitron.h> // uITRON setup CYGNUM_UITRON_SEMAS
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// CYGPKG_UITRON et al
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#ifdef CYGPKG_UITRON
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// invoke the inline function definition to create static C linkage
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// functions here:
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#define CYGPRI_UITRON_FUNCS_HERE_AND_NOW
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#include <cyg/compat/uitron/uit_func.h>
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cyg_uint32 cyg_uitron_dis_dsp_old_priority = 0;
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// ------------------------------------------------------------------------
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// STARTUP
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// this routine is outside the uITRON specification; call it from
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// cyg_start(), cyg_package_start(), cyg_prestart() or cyg_user_start()
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// to start the uITRON tasks and scheduler.
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#if CYGNUM_UITRON_START_TASKS < 0
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#error CYGNUM_UITRON_START_TASKS should be >= 0
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#endif
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#if CYGNUM_UITRON_START_TASKS == 0
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#define START_TASKS CYGNUM_UITRON_TASKS
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#else
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#define START_TASKS CYGNUM_UITRON_START_TASKS
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#endif
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#ifdef CYGPKG_UITRON_TASKS_CREATE_DELETE
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#if START_TASKS > CYGNUM_UITRON_TASKS_INITIALLY
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#undef START_TASKS
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#define START_TASKS CYGNUM_UITRON_TASKS_INITIALLY
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#endif
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#endif
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#if START_TASKS > CYGNUM_UITRON_TASKS
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#undef START_TASKS
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#define START_TASKS CYGNUM_UITRON_TASKS
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#endif
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#if START_TASKS <= 0
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#error Number of uITRON tasks to start initially must be >= 0
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#endif
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#define SET_UP_PTRS( _which_ ) CYG_MACRO_START \
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for ( i = 0; \
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(i < CYGNUM_UITRON_ ## _which_ ## _INITIALLY) && \
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(i < CYGNUM_UITRON_ ## _which_ ) ; \
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i++ ) { \
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CYG_UITRON_PTRS( _which_ )[ i ] = CYG_UITRON_OBJS( _which_ ) + i; \
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} \
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if ( (CYGNUM_UITRON_ ## _which_ ## _INITIALLY) \
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< (CYGNUM_UITRON_ ## _which_) ) \
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for ( /* i as is */; i < CYGNUM_UITRON_ ## _which_ ; i++ ) { \
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CYG_UITRON_PTRS( _which_ )[ i ] = NULL; \
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} \
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CYG_MACRO_END
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#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
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#ifdef CYGSEM_UITRON_TIME_IS_MILLISECONDS
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Cyg_Clock::converter uit_clock_to_system;
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Cyg_Clock::converter uit_clock_from_system;
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#endif
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#endif
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void cyg_uitron_start( void )
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{
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cyg_int32 i;
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#ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
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#ifdef CYGSEM_UITRON_TIME_IS_MILLISECONDS
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// initialize the clock converters
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Cyg_Clock::real_time_clock->
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get_other_to_clock_converter( 1000000, &uit_clock_to_system );
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Cyg_Clock::real_time_clock->
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get_clock_to_other_converter( 1000000, &uit_clock_from_system );
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#endif
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#endif
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for ( i = 0; i < START_TASKS; i++ ) {
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#ifdef CYGIMP_THREAD_PRIORITY
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// save the initial priority in our private array
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cyg_uitron_task_initial_priorities[ i ] =
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cyg_uitron_TASKS[ i ].get_priority();
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#endif
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// and awaken the task:
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cyg_uitron_TASKS[ i ].resume();
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}
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for ( /* i as is */; i < CYGNUM_UITRON_TASKS; i++ ) {
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#ifdef CYGIMP_THREAD_PRIORITY
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// save the initial priority in our private array
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cyg_uitron_task_initial_priorities[ i ] =
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cyg_uitron_TASKS[ i ].get_priority();
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#endif
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// but ensure the task state is dormant.
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cyg_uitron_TASKS[ i ].kill();
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}
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#ifdef CYGPKG_UITRON_TASKS_CREATE_DELETE
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SET_UP_PTRS( TASKS );
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#endif
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#ifdef CYGPKG_UITRON_SEMAS_CREATE_DELETE
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SET_UP_PTRS( SEMAS );
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#endif
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#ifdef CYGPKG_UITRON_MBOXES_CREATE_DELETE
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SET_UP_PTRS( MBOXES );
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#endif
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#ifdef CYGPKG_UITRON_FLAGS_CREATE_DELETE
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SET_UP_PTRS( FLAGS );
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#endif
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#ifdef CYGPKG_UITRON_MEMPOOLFIXED_CREATE_DELETE
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SET_UP_PTRS( MEMPOOLFIXED );
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#endif
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#ifdef CYGPKG_UITRON_MEMPOOLVAR_CREATE_DELETE
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SET_UP_PTRS( MEMPOOLVAR );
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#endif
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}
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// These allow programs to link when cyg_uitron_start() is called
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// (often because of CYGSEM_START_UITRON_COMPATIBILITY from infra,
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// though we define these regardless just in case)
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// even when there is no interest in uITRON and so the tasks are
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// not externally defined; the reference to cyg_uitron_start()
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// ensures the tasks array et al are still included...
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extern "C" {
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void task1( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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void task2( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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void task3( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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void task4( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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}
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void task1( unsigned int arg ) {}
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void task2( unsigned int arg ) {}
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void task3( unsigned int arg ) {}
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void task4( unsigned int arg ) {}
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#endif // CYGPKG_UITRON
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// EOF uit_func.cxx
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