score: Statically initialize IO manager

This simplifies the RTEMS initialization and helps to avoid a memory
overhead.  The workspace demands of the IO manager were not included in
the <rtems/confdefs.h> workspace size estimate.  This is also fixed as a
side-effect.

Update documentation and move "Specifying Application Defined Device
Driver Table" to the section end.  This sub-section is not that
important for the user.  Mentioning this at the beginning may lead to
confusion.

1 files changed, 0 insertions, 56 deletions

diff --git a/cpukit/sapi/src/io.c b/cpukit/sapi/src/io.c
index 99da902ccf..c14f5e760e 100644
--- a/cpukit/sapi/src/io.c
+++ b/cpukit/sapi/src/io.c
@@ -19,63 +19,7 @@
 #include "config.h"
 #endif
 
-#include <rtems/system.h>
-#include <rtems/config.h>
 #include <rtems/io.h>
-#include <rtems/score/isr.h>
-#include <rtems/score/thread.h>
-#include <rtems/score/wkspace.h>
-
-#include <string.h>
-
-void _IO_Manager_initialization(void)
-{
-  uint32_t                    index;
-  rtems_driver_address_table *driver_table;
-  uint32_t                    drivers_in_table;
-  uint32_t                    number_of_drivers;
-
-  driver_table      = rtems_configuration_get_device_driver_table();
-  drivers_in_table  = rtems_configuration_get_number_of_device_drivers();
-  number_of_drivers = rtems_configuration_get_maximum_drivers();
-
-  /*
-   *  If the user claims there are less drivers than are actually in
-   *  the table, then let's just go with the table's count.
-   */
-  if ( number_of_drivers <= drivers_in_table )
-    number_of_drivers = drivers_in_table;
-
-  /*
-   *  If the maximum number of driver is the same as the number in the
-   *  table, then we do not have to copy the driver table.  They can't
-   *  register any dynamically.
-   */
-  if ( number_of_drivers == drivers_in_table ) {
-    _IO_Driver_address_table = driver_table;
-    _IO_Number_of_drivers = number_of_drivers;
-    return;
-  }
-
-  /*
-   *  The application requested extra slots in the driver table, so we
-   *  have to allocate a new driver table and copy theirs to it.
-   */
-
-  _IO_Driver_address_table = (rtems_driver_address_table *)
-      _Workspace_Allocate_or_fatal_error(
-        sizeof( rtems_driver_address_table ) * ( number_of_drivers )
-      );
-  _IO_Number_of_drivers = number_of_drivers;
-
-  memset(
-    _IO_Driver_address_table, 0,
-    sizeof( rtems_driver_address_table ) * ( number_of_drivers )
-  );
-
-  for ( index = 0 ; index < drivers_in_table ; index++ )
-    _IO_Driver_address_table[index] = driver_table[index];
-}
 
 void _IO_Initialize_all_drivers( void )
 {