1 files changed, 155 insertions, 0 deletions
diff --git a/testsuites/validation/tx-preemption-intervention.c b/testsuites/validation/tx-preemption-intervention.c
new file mode 100644
index 0000000000..f66ab839e5
--- /dev/null
+++ b/testsuites/validation/tx-preemption-intervention.c
@@ -0,0 +1,155 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSTestSuitesValidation
+ *
+ * @brief This source file contains the implementation of
+ *   SetPreemptionIntervention().
+ */
+
+/*
+ * Copyright (C) 2021 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "tx-support.h"
+
+#include <rtems/sysinit.h>
+#include <rtems/score/chainimpl.h>
+#include <rtems/score/percpu.h>
+#include <rtems/score/threadimpl.h>
+
+#include <rtems/test.h>
+
+#if defined(RTEMS_SMP)
+typedef struct {
+  void           ( *handler )( void * );
+  void             *arg;
+  Scheduler_Context scheduler_context;
+  Scheduler_Node    scheduler_node;
+  Thread_Control    thread;
+} PreemptionInterventionContext;
+
+static PreemptionInterventionContext preemption_intervention_instance;
+
+static bool PreemptionInterventionAskForHelp(
+  const Scheduler_Control *scheduler,
+  Thread_Control          *thread,
+  Scheduler_Node          *node
+)
+{
+  PreemptionInterventionContext *ctx;
+  void                        ( *handler )( void * );
+  void                          *arg;
+
+  (void) scheduler;
+  (void) thread;
+  (void) node;
+
+  ctx = &preemption_intervention_instance;
+  handler = ctx->handler;
+  arg = ctx->arg;
+  ctx->handler = NULL;
+  ctx->arg = NULL;
+  ( *handler )( arg );
+
+  return true;
+}
+
+static const Scheduler_Control preemption_intervention_scheduler = {
+  .context = &preemption_intervention_instance.scheduler_context,
+  .Operations = {
+    .ask_for_help = PreemptionInterventionAskForHelp
+  }
+};
+
+static void PreemptionInterventionInitialize( void )
+{
+  PreemptionInterventionContext *ctx;
+
+  ctx = &preemption_intervention_instance;
+
+  _Chain_Initialize_node( &ctx->thread.Scheduler.Help_node );
+  _Thread_queue_Initialize(
+    &ctx->thread.Join_queue,
+    "Preemption Intervention"
+  );
+  _ISR_lock_Initialize(
+    &ctx->scheduler_context.Lock,
+    "Preemption Intervention"
+  );
+  _Scheduler_Node_do_initialize(
+    &preemption_intervention_scheduler,
+    &ctx->scheduler_node,
+    &ctx->thread,
+    0
+  );
+  _Chain_Initialize_one(
+    &ctx->thread.Scheduler.Scheduler_nodes,
+    &ctx->scheduler_node.Thread.Scheduler_node.Chain
+  );
+}
+
+RTEMS_SYSINIT_ITEM(
+  PreemptionInterventionInitialize,
+  RTEMS_SYSINIT_DEVICE_DRIVERS,
+  RTEMS_SYSINIT_ORDER_MIDDLE
+);
+#endif
+
+void SetPreemptionIntervention(
+  struct Per_CPU_Control *cpu,
+  void                 ( *handler )( void * ),
+  void                   *arg
+)
+{
+#if defined(RTEMS_SMP)
+  PreemptionInterventionContext *ctx;
+  rtems_interrupt_level          level;
+  ISR_lock_Context               lock_context;
+
+  ctx = &preemption_intervention_instance;
+  T_quiet_assert_null( ctx->handler );
+  ctx->handler = handler;
+  ctx->arg = arg;
+
+  rtems_interrupt_local_disable( level );
+  _Per_CPU_Acquire( cpu, &lock_context );
+  _Chain_Append_unprotected(
+    &cpu->Threads_in_need_for_help,
+    &ctx->thread.Scheduler.Help_node
+  );
+  _Per_CPU_Release( cpu, &lock_context );
+  rtems_interrupt_local_enable( level );
+#else
+  (void) cpu;
+  (void) handler;
+  (void) arg;
+#endif
+}