score: Use ISR lock for IO driver registration

Create implementation header file.

Update #2555.

3 files changed, 66 insertions, 13 deletions

diff --git a/cpukit/sapi/include/confdefs.h b/cpukit/sapi/include/confdefs.h
index ee2558cbc8..89beb2304b 100644
--- a/cpukit/sapi/include/confdefs.h
+++ b/cpukit/sapi/include/confdefs.h
@@ -26,6 +26,7 @@
  * Include the executive's configuration
  */
 #include <rtems.h>
+#include <rtems/ioimpl.h>
 #include <rtems/sysinit.h>
 #include <rtems/score/apimutex.h>
 #include <rtems/score/percpu.h>
diff --git a/cpukit/sapi/include/rtems/io.h b/cpukit/sapi/include/rtems/io.h
index f5876a0283..760d412bb8 100644
--- a/cpukit/sapi/include/rtems/io.h
+++ b/cpukit/sapi/include/rtems/io.h
@@ -246,19 +246,6 @@ rtems_status_code rtems_io_lookup_name(
     rtems_driver_name_t  *device_info
 ) RTEMS_DEPRECATED;
 
-extern const size_t _IO_Number_of_drivers;
-
-extern rtems_driver_address_table _IO_Driver_address_table[];
-
-extern bool _IO_All_drivers_initialized;
-
-/**
- * @brief Initialization of all device drivers.
- *
- * Initializes all device drivers.
- */
-void _IO_Initialize_all_drivers( void );
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/cpukit/sapi/include/rtems/ioimpl.h b/cpukit/sapi/include/rtems/ioimpl.h
new file mode 100644
index 0000000000..5c4a82eea6
--- /dev/null
+++ b/cpukit/sapi/include/rtems/ioimpl.h
@@ -0,0 +1,65 @@
+/**
+ * @file
+ *
+ * @brief Classic Input/Output Manager Implementation API
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2008.
+ *  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.
+ */
+
+#ifndef _RTEMS_IOIMPL_H
+#define _RTEMS_IOIMPL_H
+
+#include <rtems/io.h>
+#include <rtems/score/isrlock.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+extern const size_t _IO_Number_of_drivers;
+
+extern rtems_driver_address_table _IO_Driver_address_table[];
+
+extern bool _IO_All_drivers_initialized;
+
+/**
+ * @brief Initialization of all device drivers.
+ *
+ * Initializes all device drivers.
+ */
+void _IO_Initialize_all_drivers( void );
+
+ISR_LOCK_DECLARE( extern, _IO_Driver_registration_lock )
+
+RTEMS_INLINE_ROUTINE void _IO_Driver_registration_acquire(
+  ISR_lock_Context *lock_context
+)
+{
+  _ISR_lock_ISR_disable_and_acquire(
+    &_IO_Driver_registration_lock,
+    lock_context
+  );
+}
+
+RTEMS_INLINE_ROUTINE void _IO_Driver_registration_release(
+  ISR_lock_Context *lock_context
+)
+{
+  _ISR_lock_Release_and_ISR_enable(
+    &_IO_Driver_registration_lock,
+    lock_context
+  );
+}
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_IOIMPL_H */