From c46fbb955258df3ff3c325dadd1a6c17ee81a914 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Thu, 1 Dec 2022 10:21:25 +0100
Subject: config: Add CONFIGURE_RECORD_INTERRUPTS_ENABLED

This enables the tracing of interrupt entry/exit events through an
application configuration option.  The interrupt processing can be
viewed with Trace Compass using rtems-record-lttng from the RTEMS Tools.

Update #4769.
---
 bsps/shared/irq/irq-record.c | 97 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 bsps/shared/irq/irq-record.c

(limited to 'bsps/shared')

diff --git a/bsps/shared/irq/irq-record.c b/bsps/shared/irq/irq-record.c
new file mode 100644
index 0000000000..9f0a008d84
--- /dev/null
+++ b/bsps/shared/irq/irq-record.c
@@ -0,0 +1,97 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup bsp_interrupt
+ *
+ * @brief This source file contains the implementation of the interrupt event
+ *   recording support.
+ */
+
+/*
+ * Copyright (C) 2022 embedded brains GmbH
+ *
+ * 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.
+ */
+
+#include <bsp/irq-generic.h>
+
+#include <rtems/record.h>
+
+/* The regular interrupt entries are registered in this table */
+static rtems_interrupt_entry *
+_Record_Interrupt_dispatch_table[ BSP_INTERRUPT_DISPATCH_TABLE_SIZE ];
+
+/*
+ * Provide one interrupt entry for the _Record_Interrupt_handler() interrupt
+ * dispatch wrapper for each interrupt vector.
+ */
+static rtems_interrupt_entry
+_Record_Interrupt_entry_table[ BSP_INTERRUPT_DISPATCH_TABLE_SIZE ];
+
+rtems_interrupt_entry **bsp_interrupt_get_dispatch_table_slot(
+  rtems_vector_number index
+)
+{
+  return &_Record_Interrupt_dispatch_table[ index ];
+}
+
+static void _Record_Interrupt_handler( void *arg )
+{
+  uintptr_t              vector;
+  rtems_interrupt_entry *entry;
+
+  vector = (uintptr_t) arg;
+  rtems_record_produce( RTEMS_RECORD_INTERRUPT_ENTRY, vector );
+
+  entry = bsp_interrupt_entry_load_acquire(
+    &_Record_Interrupt_dispatch_table[ vector ]
+  );
+
+  if ( RTEMS_PREDICT_TRUE( entry != NULL ) ) {
+    bsp_interrupt_dispatch_entries( entry );
+  } else {
+#if defined(RTEMS_SMP)
+    bsp_interrupt_spurious( vector );
+#else
+    bsp_interrupt_handler_default( vector );
+#endif
+  }
+
+  rtems_record_produce( RTEMS_RECORD_INTERRUPT_EXIT, vector );
+}
+
+void _Record_Interrupt_initialize( void )
+{
+  uintptr_t i;
+
+  /*
+   * Let each interrupt dispatch table slot reference the
+   * _Record_Interrupt_handler() interrupt dispatch wrapper.
+   */
+  for ( i = 0; i < BSP_INTERRUPT_DISPATCH_TABLE_SIZE; ++i ) {
+    _Record_Interrupt_entry_table[ i ].handler = _Record_Interrupt_handler;
+    _Record_Interrupt_entry_table[ i ].arg = (void *) i;
+    bsp_interrupt_dispatch_table[ i ] = &_Record_Interrupt_entry_table[ i ];
+  }
+}
-- 
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