[rtems commit] score: Ensure only one CPU if required
Sebastian Huber
sebh at rtems.org
Tue Sep 21 08:25:31 UTC 2021
Module: rtems
Branch: master
Commit: 3291b2a7d558d2b4095cdb8abba84ff3ed0dc59b
Changeset: http://git.rtems.org/rtems/commit/?id=3291b2a7d558d2b4095cdb8abba84ff3ed0dc59b
Author: Sebastian Huber <sebastian.huber at embedded-brains.de>
Date: Fri Sep 17 08:49:56 2021 +0200
score: Ensure only one CPU if required
Issue the new fatal SMP error
SMP_FATAL_SCHEDULER_REQUIRES_EXACTLY_ONE_PROCESSOR if the system starts
with not exactly one processor and an uniprocessor scheduler is
configured.
---
cpukit/include/rtems/score/smpimpl.h | 3 ++-
cpukit/include/rtems/sysinit.h | 1 +
cpukit/score/src/schedulerdefaultpinunpindonothing.c | 19 +++++++++++++++++++
3 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/cpukit/include/rtems/score/smpimpl.h b/cpukit/include/rtems/score/smpimpl.h
index 7c3e777..e259105 100644
--- a/cpukit/include/rtems/score/smpimpl.h
+++ b/cpukit/include/rtems/score/smpimpl.h
@@ -72,7 +72,8 @@ typedef enum {
SMP_FATAL_SHUTDOWN_RESPONSE,
SMP_FATAL_START_OF_MANDATORY_PROCESSOR_FAILED,
SMP_FATAL_SCHEDULER_PIN_OR_UNPIN_NOT_SUPPORTED,
- SMP_FATAL_WRONG_CPU_STATE_TO_PERFORM_JOBS
+ SMP_FATAL_WRONG_CPU_STATE_TO_PERFORM_JOBS,
+ SMP_FATAL_SCHEDULER_REQUIRES_EXACTLY_ONE_PROCESSOR
} SMP_Fatal_code;
/**
diff --git a/cpukit/include/rtems/sysinit.h b/cpukit/include/rtems/sysinit.h
index 3e85aa9..e3d7023 100644
--- a/cpukit/include/rtems/sysinit.h
+++ b/cpukit/include/rtems/sysinit.h
@@ -43,6 +43,7 @@ extern "C" {
#define RTEMS_SYSINIT_INITIAL_EXTENSIONS 000500
#define RTEMS_SYSINIT_MP_EARLY 000600
#define RTEMS_SYSINIT_DATA_STRUCTURES 000700
+#define RTEMS_SYSINIT_SCHEDULER 000780
#define RTEMS_SYSINIT_MP 000800
#define RTEMS_SYSINIT_USER_EXTENSIONS 000900
#define RTEMS_SYSINIT_CLASSIC_TASKS 000a00
diff --git a/cpukit/score/src/schedulerdefaultpinunpindonothing.c b/cpukit/score/src/schedulerdefaultpinunpindonothing.c
index f7bab4f..f3ecb0b 100644
--- a/cpukit/score/src/schedulerdefaultpinunpindonothing.c
+++ b/cpukit/score/src/schedulerdefaultpinunpindonothing.c
@@ -39,6 +39,9 @@
#endif
#include <rtems/score/scheduler.h>
+#include <rtems/score/interr.h>
+#include <rtems/score/smpimpl.h>
+#include <rtems/sysinit.h>
void _Scheduler_default_Pin_or_unpin_do_nothing(
const Scheduler_Control *scheduler,
@@ -52,3 +55,19 @@ void _Scheduler_default_Pin_or_unpin_do_nothing(
(void) node;
(void) cpu;
}
+
+static void _Scheduler_Ensure_exactly_one_processor( void )
+{
+ if ( _SMP_Get_processor_maximum() != 1 ) {
+ _Terminate(
+ RTEMS_FATAL_SOURCE_SMP,
+ SMP_FATAL_SCHEDULER_REQUIRES_EXACTLY_ONE_PROCESSOR
+ );
+ }
+}
+
+RTEMS_SYSINIT_ITEM(
+ _Scheduler_Ensure_exactly_one_processor,
+ RTEMS_SYSINIT_SCHEDULER,
+ RTEMS_SYSINIT_ORDER_MIDDLE
+);
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