/* Shm_Initialization
*
* This routine is the shared memory communications initerface
* driver initialization routine.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#define _SHM_INIT
#include <rtems.h>
#include <shm.h>
#include <string.h> /* memset() */
#include <stdlib.h> /* malloc() */
#include <assert.h>
/*
* User extension to install MPCI_Fatal as a fatal error
* handler extension
*/
rtems_extensions_table MPCI_Shm_extensions;
rtems_mpci_entry Shm_Initialization( void )
{
rtems_unsigned32 i, all_initialized;
rtems_unsigned32 interrupt_cause, interrupt_value;
void *interrupt_address;
Shm_Node_status_control *nscb;
rtems_unsigned32 extension_id; /* for installation of MPCI_Fatal */
rtems_unsigned32 remaining_memory;
/* XXX these should use "public" methods to set their values.... */
rtems_configuration_table *configuration = _Configuration_Table;
rtems_multiprocessing_table *mp_configuration = _Configuration_MP_table;
Shm_RTEMS_Configuration = configuration;
Shm_RTEMS_MP_Configuration = mp_configuration;
Shm_Local_node = Shm_RTEMS_MP_Configuration->node;
Shm_Maximum_nodes = Shm_RTEMS_MP_Configuration->maximum_nodes;
Shm_Get_configuration( Shm_Local_node, &Shm_Configuration );
Shm_Interrupt_table = (Shm_Interrupt_information *) malloc(
sizeof(Shm_Interrupt_information) * (Shm_Maximum_nodes + 1)
);
assert( Shm_Interrupt_table );
Shm_Receive_message_count = 0;
Shm_Null_message_count = 0;
Shm_Interrupt_count = 0;
/*
* Set the Node Status indicators
*/
Shm_Pending_initialization =
Shm_Convert(rtems_build_name( 'P', 'E', 'N', 'D' ));
Shm_Initialization_complete =
Shm_Convert(rtems_build_name( 'C', 'O', 'M', 'P' ));
Shm_Active_node =
Shm_Convert(rtems_build_name( 'A', 'C', 'T', 'V' ));
/*
* Initialize the constants used by the Locked Queue code.
*/
Shm_Locked_queue_End_of_list = Shm_Convert( 0xffffffff );
Shm_Locked_queue_Not_on_list = Shm_Convert( 0xfffffffe );
/*
* Set the base addresses for the:
* + Node Status Table
* + Free Pool and Receive Queues
* + Envelopes
*/
Shm_Node_statuses = (Shm_Node_status_control *) START_NS_CBS;
Shm_Locked_queues = (Shm_Locked_queue_Control *) START_LQ_CBS;
Shm_Envelopes = (Shm_Envelope_control *) START_ENVELOPES;
/*
* Calculate the maximum number of envelopes which can be
* placed the remaining shared memory.
*/
remaining_memory =
((void *)Shm_Configuration->base + Shm_Configuration->length) -
((void *)Shm_Envelopes);
Shm_Maximum_envelopes = remaining_memory / sizeof( Shm_Envelope_control );
Shm_Maximum_envelopes -= 1;
/*
* Set the pointer to the receive queue for the local node.
* When we receive a node, we will get it from here before
* processing it.
*/
Shm_Local_receive_queue = &Shm_Locked_queues[ Shm_Local_node ];
Shm_Local_node_status = &Shm_Node_statuses[ Shm_Local_node ];
/*
* Convert local interrupt cause information into the
* neutral format so other nodes will be able to
* understand it.
*/
interrupt_address =
(void *) Shm_Convert( (rtems_unsigned32)Shm_Configuration->Intr.address );
interrupt_value = Shm_Convert( Shm_Configuration->Intr.value );
interrupt_cause = Shm_Convert( Shm_Configuration->Intr.length );
if ( Shm_Configuration->poll_intr == POLLED_MODE ) Shm_setclockvec();
else Shm_setvec();
if ( Shm_Is_master_node() ) {
/*
* Zero out the shared memory area.
*/
(void) memset(
(void *) Shm_Configuration->base,
0,
Shm_Configuration->length
);
/*
* Initialize all of the locked queues (the free envelope
* pool and a receive queue per node) and set all of the
* node's status so they will be waiting to initialization
* to complete.
*/
Shm_Locked_queue_Initialize( FREE_ENV_CB, FREE_ENV_POOL );
for ( i=SHM_FIRST_NODE ; i<=Shm_Maximum_nodes ; i++ ) {
Shm_Initialize_receive_queue( i );
Shm_Node_statuses[ i ].status = Shm_Pending_initialization;
Shm_Node_statuses[ i ].error = 0;
}
/*
* Initialize all of the envelopes and place them in the
* free pool.
*/
for ( i=0 ; i<Shm_Maximum_envelopes ; i++ ) {
Shm_Envelopes[ i ].index = Shm_Convert(i);
Shm_Free_envelope( &Shm_Envelopes[ i ] );
}
/*
* Initialize this node's interrupt information in the
* shared area so other nodes can interrupt us.
*/
Shm_Local_node_status->int_address = (rtems_unsigned32) interrupt_address;
Shm_Local_node_status->int_value = interrupt_value;
Shm_Local_node_status->int_length = interrupt_cause;
Shm_Local_node_status->status = Shm_Initialization_complete;
/*
* Loop until all nodes have completed initialization.
*/
do {
all_initialized = 1;
for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ )
if ( Shm_Node_statuses[ i ].status != Shm_Initialization_complete )
all_initialized = 0;
} while ( all_initialized == 0 );
/*
* Tell the other nodes we think that the system is up.
*/
for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ )
Shm_Node_statuses[ i ].status = Shm_Active_node;
} else { /* is not MASTER node */
/*
* Initialize the node status for the non-master nodes.
* Because the master node zeroes out memory, it is
* necessary for them to keep putting their values in
* the node status area until the master says they
* should become active.
*/
Shm_Local_node_status->status = Shm_Pending_initialization;
do {
if ( Shm_Local_node_status->status == Shm_Pending_initialization ) {
/*
* Initialize this node's interrupt information in the
* shared area so other nodes can interrupt us.
*/
Shm_Local_node_status->int_address =
(rtems_unsigned32) interrupt_address;
Shm_Local_node_status->int_value = interrupt_value;
Shm_Local_node_status->int_length = interrupt_cause;
Shm_Local_node_status->status = Shm_Initialization_complete;
}
} while ( Shm_Local_node_status->status != Shm_Active_node ) ;
}
/*
* Initialize the Interrupt Information Table
*/
for ( i = SHM_FIRST_NODE ; i <= Shm_Maximum_nodes ; i++ ) {
nscb = &Shm_Node_statuses[ i ];
Shm_Interrupt_table[i].address = Shm_Convert_address(
(void *)Shm_Convert(((vol_u32) nscb->int_address))
);
Shm_Interrupt_table[i].value = Shm_Convert( nscb->int_value );
Shm_Interrupt_table[i].length = Shm_Convert( nscb->int_length );
}
MPCI_Shm_extensions.fatal = MPCI_Fatal;
(void) rtems_extension_create(
rtems_build_name( 'M', 'P', 'E', 'X' ),
&MPCI_Shm_extensions,
&extension_id
);
}
