bsps: Move bspreset.c to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/arm/shared/start/bspreset-armv7m.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2015 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/bootcard.h>
+#include <bsp/start.h>
+
+#ifdef ARM_MULTILIB_ARCH_V7M
+
+BSP_START_TEXT_SECTION __attribute__((flatten)) void bsp_reset(void)
+{
+  rtems_interrupt_level level;
+
+  rtems_interrupt_local_disable(level);
+  (void) level;
+
+  _ARMV7M_SCB->aircr = ARMV7M_SCB_AIRCR_VECTKEY
+    | ARMV7M_SCB_AIRCR_SYSRESETREQ;
+
+  while (true) {
+    /* Do nothing */
+  }
+}
+
+#endif /* ARM_MULTILIB_ARCH_V7M */