diff options
Diffstat (limited to 'cpukit/rtems/src/dpmem.c')
| -rw-r--r-- | cpukit/rtems/src/dpmem.c | 281 |
1 files changed, 0 insertions, 281 deletions
diff --git a/cpukit/rtems/src/dpmem.c b/cpukit/rtems/src/dpmem.c deleted file mode 100644 index 982116d859..0000000000 --- a/cpukit/rtems/src/dpmem.c +++ /dev/null @@ -1,281 +0,0 @@ -/* - * Dual Port Memory Manager - * - * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. - * On-Line Applications Research Corporation (OAR). - * All rights assigned to U.S. Government, 1994. - * - * This material may be reproduced by or for the U.S. Government pursuant - * to the copyright license under the clause at DFARS 252.227-7013. This - * notice must appear in all copies of this file and its derivatives. - * - * $Id$ - */ - -#include <rtems/system.h> -#include <rtems/rtems/status.h> -#include <rtems/rtems/support.h> -#include <rtems/score/address.h> -#include <rtems/rtems/dpmem.h> -#include <rtems/score/object.h> -#include <rtems/score/thread.h> -#include <rtems/rtems/dpmem.h> - -/*PAGE - * - * _Dual_ported_memory_Manager_initialization - * - * This routine initializes all dual-ported memory manager related - * data structures. - * - * Input parameters: - * maximum_ports - number of ports to initialize - * - * Output parameters: NONE - */ - -void _Dual_ported_memory_Manager_initialization( - unsigned32 maximum_ports -) -{ - _Objects_Initialize_information( - &_Dual_ported_memory_Information, - OBJECTS_RTEMS_PORTS, - FALSE, - maximum_ports, - sizeof( Dual_ported_memory_Control ), - FALSE, - RTEMS_MAXIMUM_NAME_LENGTH, - FALSE - ); -} - -/*PAGE - * - * rtems_port_create - * - * This directive creates a port into a dual-ported memory area. - * - * Input parameters: - * name - user defined port name - * internal_start - internal start address of port - * external_start - external start address of port - * length - physical length in bytes - * id - address of port id to set - * - * Output parameters: - * id - port id - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_port_create( - rtems_name name, - void *internal_start, - void *external_start, - unsigned32 length, - Objects_Id *id -) -{ - register Dual_ported_memory_Control *the_port; - - if ( !rtems_is_name_valid( name) ) - return RTEMS_INVALID_NAME; - - if ( !_Addresses_Is_aligned( internal_start ) || - !_Addresses_Is_aligned( external_start ) ) - return RTEMS_INVALID_ADDRESS; - - _Thread_Disable_dispatch(); /* to prevent deletion */ - - the_port = _Dual_ported_memory_Allocate(); - - if ( !the_port ) { - _Thread_Enable_dispatch(); - return RTEMS_TOO_MANY; - } - - the_port->internal_base = internal_start; - the_port->external_base = external_start; - the_port->length = length - 1; - - _Objects_Open( - &_Dual_ported_memory_Information, - &the_port->Object, - &name - ); - - *id = the_port->Object.id; - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; -} - -/*PAGE - * - * rtems_port_ident - * - * This directive returns the system ID associated with - * the port name. - * - * Input parameters: - * name - user defined port name - * id - pointer to port id - * - * Output parameters: - * *id - port id - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_port_ident( - rtems_name name, - Objects_Id *id -) -{ - Objects_Name_to_id_errors status; - - status = _Objects_Name_to_id( - &_Dual_ported_memory_Information, - &name, - OBJECTS_SEARCH_ALL_NODES, - id - ); - - return _Status_Object_name_errors_to_status[ status ]; -} - -/*PAGE - * - * rtems_port_delete - * - * This directive allows a thread to delete a dual-ported memory area - * specified by the dual-ported memory identifier. - * - * Input parameters: - * id - dual-ported memory area id - * - * Output parameters: - * RTEMS_SUCCESSFUL - if successful - * error code - if unsuccessful - */ - -rtems_status_code rtems_port_delete( - Objects_Id id -) -{ - register Dual_ported_memory_Control *the_port; - Objects_Locations location; - - the_port = _Dual_ported_memory_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - _Objects_Close( &_Dual_ported_memory_Information, &the_port->Object ); - _Dual_ported_memory_Free( the_port ); - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} - -/*PAGE - * - * rtems_port_internal_to_external - * - * This directive converts an internal dual-ported memory address to an - * external dual-ported memory address. If the given internal address - * is an invalid dual-ported address, then the external address is set - * to the given internal address. - * - * Input parameters: - * id - id of dual-ported memory object - * internal - internal address to set - * external - pointer to external address - * - * Output parameters: - * external - external address - * RTEMS_SUCCESSFUL - always succeeds - */ - -rtems_status_code rtems_port_internal_to_external( - Objects_Id id, - void *internal, - void **external -) -{ - register Dual_ported_memory_Control *the_port; - Objects_Locations location; - unsigned32 ending; - - the_port = _Dual_ported_memory_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - ending = _Addresses_Subtract( internal, the_port->internal_base ); - if ( ending > the_port->length ) - *external = internal; - else - *external = _Addresses_Add_offset( the_port->external_base, - ending ); - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} - -/*PAGE - * - * rtems_port_external_to_internal - * - * This directive converts an external dual-ported memory address to an - * internal dual-ported memory address. If the given external address - * is an invalid dual-ported address, then the internal address is set - * to the given external address. - * - * Input parameters: - * id - id of dp memory object - * external - external address - * internal - pointer of internal address to set - * - * Output parameters: - * internal - internal address - * RTEMS_SUCCESSFUL - always succeeds - */ - -rtems_status_code rtems_port_external_to_internal( - Objects_Id id, - void *external, - void **internal -) -{ - register Dual_ported_memory_Control *the_port; - Objects_Locations location; - unsigned32 ending; - - the_port = _Dual_ported_memory_Get( id, &location ); - switch ( location ) { - case OBJECTS_ERROR: - return RTEMS_INVALID_ID; - case OBJECTS_REMOTE: /* this error cannot be returned */ - return RTEMS_INTERNAL_ERROR; - case OBJECTS_LOCAL: - ending = _Addresses_Subtract( external, the_port->external_base ); - if ( ending > the_port->length ) - *internal = external; - else - *internal = _Addresses_Add_offset( the_port->internal_base, - ending ); - _Thread_Enable_dispatch(); - return RTEMS_SUCCESSFUL; - } - - return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ -} |