/*
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/*
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* Dual Port Memory Manager
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* Dual Port Memory Manager
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*
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*
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* COPYRIGHT (c) 1989-1999.
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* COPYRIGHT (c) 1989-1999.
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* On-Line Applications Research Corporation (OAR).
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* On-Line Applications Research Corporation (OAR).
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*
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*
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* The license and distribution terms for this file may be
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* found in the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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* http://www.OARcorp.com/rtems/license.html.
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*
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*
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* dpmemcreate.c,v 1.3 2002/07/01 22:32:31 joel Exp
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* dpmemcreate.c,v 1.3 2002/07/01 22:32:31 joel Exp
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*/
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*/
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#include <rtems/system.h>
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#include <rtems/system.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/status.h>
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#include <rtems/rtems/support.h>
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#include <rtems/rtems/support.h>
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#include <rtems/score/address.h>
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#include <rtems/score/address.h>
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#include <rtems/rtems/dpmem.h>
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#include <rtems/rtems/dpmem.h>
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#include <rtems/score/object.h>
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#include <rtems/score/object.h>
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#include <rtems/score/thread.h>
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#include <rtems/score/thread.h>
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#include <rtems/rtems/dpmem.h>
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#include <rtems/rtems/dpmem.h>
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/*PAGE
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/*PAGE
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*
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*
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* rtems_port_create
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* rtems_port_create
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*
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*
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* This directive creates a port into a dual-ported memory area.
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* This directive creates a port into a dual-ported memory area.
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*
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*
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* Input parameters:
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* Input parameters:
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* name - user defined port name
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* name - user defined port name
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* internal_start - internal start address of port
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* internal_start - internal start address of port
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* external_start - external start address of port
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* external_start - external start address of port
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* length - physical length in bytes
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* length - physical length in bytes
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* id - address of port id to set
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* id - address of port id to set
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*
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*
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* Output parameters:
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* Output parameters:
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* id - port id
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* id - port id
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* RTEMS_SUCCESSFUL - if successful
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* RTEMS_SUCCESSFUL - if successful
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* error code - if unsuccessful
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* error code - if unsuccessful
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*/
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*/
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rtems_status_code rtems_port_create(
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rtems_status_code rtems_port_create(
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rtems_name name,
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rtems_name name,
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void *internal_start,
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void *internal_start,
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void *external_start,
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void *external_start,
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unsigned32 length,
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unsigned32 length,
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Objects_Id *id
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Objects_Id *id
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)
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)
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{
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{
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register Dual_ported_memory_Control *the_port;
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register Dual_ported_memory_Control *the_port;
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if ( !rtems_is_name_valid( name) )
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if ( !rtems_is_name_valid( name) )
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return RTEMS_INVALID_NAME;
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return RTEMS_INVALID_NAME;
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if ( !_Addresses_Is_aligned( internal_start ) ||
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if ( !_Addresses_Is_aligned( internal_start ) ||
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!_Addresses_Is_aligned( external_start ) )
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!_Addresses_Is_aligned( external_start ) )
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return RTEMS_INVALID_ADDRESS;
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return RTEMS_INVALID_ADDRESS;
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_Thread_Disable_dispatch(); /* to prevent deletion */
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_Thread_Disable_dispatch(); /* to prevent deletion */
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the_port = _Dual_ported_memory_Allocate();
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the_port = _Dual_ported_memory_Allocate();
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if ( !the_port ) {
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if ( !the_port ) {
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_Thread_Enable_dispatch();
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_Thread_Enable_dispatch();
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return RTEMS_TOO_MANY;
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return RTEMS_TOO_MANY;
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}
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}
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the_port->internal_base = internal_start;
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the_port->internal_base = internal_start;
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the_port->external_base = external_start;
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the_port->external_base = external_start;
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the_port->length = length - 1;
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the_port->length = length - 1;
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_Objects_Open(
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_Objects_Open(
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&_Dual_ported_memory_Information,
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&_Dual_ported_memory_Information,
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&the_port->Object,
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&the_port->Object,
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name
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name
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);
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);
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*id = the_port->Object.id;
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*id = the_port->Object.id;
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_Thread_Enable_dispatch();
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_Thread_Enable_dispatch();
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return RTEMS_SUCCESSFUL;
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return RTEMS_SUCCESSFUL;
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}
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}
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