bsps: Move shmdr to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

bsps/shared/shmdr/shmdr-poll.c

@@ -0,0 +1,57 @@
+/**
+ * @file
+ * This routine polls to see if a packet has arrived.  If one
+ * has it informs the executive. It uses a Classic API Timer
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2008, 2016.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  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/sysstate.h>
+#include <rtems/libio.h>
+
+#include <assert.h>
+
+#include "shm_driver.h"
+
+static rtems_timer_service_routine Shm_Poll_TSR(
+  rtems_id  id,
+  void     *ignored_address
+)
+{
+  uint32_t tmpfront;
+
+  /*
+   *  This should NEVER happen but just in case.
+   */
+  if (!_System_state_Is_up(_System_state_Get()))
+    return;
+
+  tmpfront = Shm_Local_receive_queue->front;
+  if ( Shm_Convert(tmpfront) != Shm_Locked_queue_End_of_list ) {
+    rtems_multiprocessing_announce();
+    Shm_Interrupt_count++;
+  }
+
+  (void) rtems_timer_reset( id );
+}
+
+void Shm_install_timer(void)
+{
+  rtems_id          id;
+  rtems_status_code status;
+
+  status = rtems_timer_create( rtems_build_name( 'S', 'H', 'P', 'L' ), &id );
+  assert( !status );
+
+  status = rtems_timer_fire_after( id, 1, Shm_Poll_TSR, NULL );
+  assert( !status );
+}
+