From 3291b2a7d558d2b4095cdb8abba84ff3ed0dc59b Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Fri, 17 Sep 2021 08:49:56 +0200
Subject: 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/score/src/schedulerdefaultpinunpindonothing.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'cpukit/score/src/schedulerdefaultpinunpindonothing.c')

diff --git a/cpukit/score/src/schedulerdefaultpinunpindonothing.c b/cpukit/score/src/schedulerdefaultpinunpindonothing.c
index f7bab4f661..f3ecb0b718 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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