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score: Delete _Thread_BSP_context

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Do not return to BSP context in the exit() shutdown path.  This makes it
possible to re-use the initialization stack.  It can be used for the
interrupt stack for example.  On targets with a small RAM this is a
considerable benefit.

This change eliminates also some special cases and simplifies the code.

Delete _Thread_Set_global_exit_status(),
_Thread_Get_global_exit_status() and _Thread_Stop_multitasking().
This commit is contained in:
Sebastian Huber
2014-02-19 09:59:39 +01:00
parent 92f50c3b29
commit 514705d2f1
8 changed files with 41 additions and 159 deletions
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cpukit/sapi/src/exinit.c
+2 -8
View File
@@ -33,7 +33,6 @@
#include <rtems/config.h>
#include <rtems/debug.h>
#include <rtems/extensionimpl.h>
#include <rtems/fatal.h>
#include <rtems/init.h>
#include <rtems/io.h>
#include <rtems/score/sysstate.h>
@@ -215,25 +214,20 @@ void rtems_initialize_device_drivers(void)
void rtems_initialize_start_multitasking(void)
{
uint32_t status;
_System_state_Set( SYSTEM_STATE_UP );
#if defined(RTEMS_SMP)
_SMP_Request_other_cores_to_perform_first_context_switch();
#endif
_Thread_Start_multitasking( &_Thread_BSP_context );
_Thread_Start_multitasking();
/*******************************************************************
*******************************************************************
*******************************************************************
****** APPLICATION RUNS HERE ******
****** RETURNS WHEN SYSTEM IS SHUT DOWN ******
****** THE FUNCTION NEVER RETURNS ******
*******************************************************************
*******************************************************************
*******************************************************************/
status = _Thread_Get_global_exit_status();
rtems_fatal( RTEMS_FATAL_SOURCE_EXIT, status );
}
cpukit/sapi/src/exshutdown.c
+20 -30
View File
@@ -15,47 +15,37 @@
#include <rtems/init.h>
#include <rtems/score/sysstate.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/interr.h>
#if defined(RTEMS_SMP)
#include <rtems/score/smp.h>
#endif
/*
* rtems_shutdown_executive
*
* This kernel routine shutdowns the executive. It halts multitasking
* and returns control to the application execution "thread" which
* initialially invoked the rtems_initialize_executive directive.
*
* Input parameters: NONE
*
* Output parameters: NONE
*/
void rtems_shutdown_executive(
uint32_t result
)
void rtems_shutdown_executive( uint32_t result )
{
Internal_errors_Source source;
bool is_internal;
Internal_errors_t code;
if ( _System_state_Is_up( _System_state_Get() ) ) {
#if defined(RTEMS_SMP)
_SMP_Request_other_cores_to_shutdown();
#endif
_Thread_Set_global_exit_status( result );
_Thread_Stop_multitasking();
/*******************************************************************
*******************************************************************
****** RETURN TO RTEMS_INITIALIZE_START_MULTITASKING() ******
****** AND THEN TO BOOT_CARD() ******
*******************************************************************
*******************************************************************/
source = RTEMS_FATAL_SOURCE_EXIT;
is_internal = false;
code = result;
} else {
source = INTERNAL_ERROR_CORE;
is_internal = true;
code = INTERNAL_ERROR_SHUTDOWN_WHEN_NOT_UP;
}
_Internal_error_Occurred(
INTERNAL_ERROR_CORE,
true,
INTERNAL_ERROR_SHUTDOWN_WHEN_NOT_UP
);
_Internal_error_Occurred( source, is_internal, code );
/***************************************************************
***************************************************************
* SYSTEM SHUTS DOWN!!! WE DO NOT RETURN TO THIS POINT!!! *
***************************************************************
***************************************************************/
}