From 2ae0acbb71cb455e4afaba45b8722f691f329f22 Mon Sep 17 00:00:00 2001
From: Christian Mauderer <Christian.Mauderer@embedded-brains.de>
Date: Wed, 11 Oct 2017 15:38:13 +0200
Subject: bsp/atsam: Add bsp_restart.

---
 c/src/lib/libbsp/arm/atsam/Makefile.am       |  1 +
 c/src/lib/libbsp/arm/atsam/include/bsp.h     |  2 ++
 c/src/lib/libbsp/arm/atsam/startup/restart.c | 39 ++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)
 create mode 100644 c/src/lib/libbsp/arm/atsam/startup/restart.c

diff --git a/c/src/lib/libbsp/arm/atsam/Makefile.am b/c/src/lib/libbsp/arm/atsam/Makefile.am
index 7f0ed870b6..5eafc42872 100644
--- a/c/src/lib/libbsp/arm/atsam/Makefile.am
+++ b/c/src/lib/libbsp/arm/atsam/Makefile.am
@@ -400,6 +400,7 @@ libbsp_a_SOURCES += startup/pin-config.c
 libbsp_a_SOURCES += startup/power.c
 libbsp_a_SOURCES += startup/power-rtc.c
 libbsp_a_SOURCES += startup/power-clock.c
+libbsp_a_SOURCES += startup/restart.c
 libbsp_a_SOURCES += startup/sdram-config.c
 
 # IRQ
diff --git a/c/src/lib/libbsp/arm/atsam/include/bsp.h b/c/src/lib/libbsp/arm/atsam/include/bsp.h
index 89968e9c07..cd0103ad70 100644
--- a/c/src/lib/libbsp/arm/atsam/include/bsp.h
+++ b/c/src/lib/libbsp/arm/atsam/include/bsp.h
@@ -91,6 +91,8 @@ void atsam_rtc_get_time(rtems_time_of_day *tod);
 
 
 
+void bsp_restart( const void *const addr );
+
 /** @} */
 
 #ifdef __cplusplus
diff --git a/c/src/lib/libbsp/arm/atsam/startup/restart.c b/c/src/lib/libbsp/arm/atsam/startup/restart.c
new file mode 100644
index 0000000000..9934fbd298
--- /dev/null
+++ b/c/src/lib/libbsp/arm/atsam/startup/restart.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2017 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#include <rtems.h>
+#include <rtems/score/armv7m.h>
+#include <bsp.h>
+
+static void ARMV7M_Systick_cleanup(void)
+{
+  volatile ARMV7M_Systick *systick = _ARMV7M_Systick;
+  systick->csr = 0;
+}
+
+void bsp_restart( const void *const addr )
+{
+  rtems_interrupt_level level;
+  void(*start)(void) = (void(*)(void))(addr);
+
+  rtems_interrupt_disable(level);
+  (void)level;
+  rtems_cache_disable_instruction();
+  rtems_cache_disable_data();
+  rtems_cache_invalidate_entire_instruction();
+  rtems_cache_invalidate_entire_data();
+  ARMV7M_Systick_cleanup();
+
+  start();
+}
-- 
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