path: root/bsps/shared/shmdr/shmdr-send.c

/**
 * @file
 */

/*
 *  COPYRIGHT (c) 1989-1999, 2016.
 *  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.
 */

#include <rtems.h>
#include "shm_driver.h"

struct pkt_cpy {
  uint32_t   packet[MAX_PACKET_SIZE/4];
};

/**
 * This routine is the shared memory driver locked queue write
 * MPCI driver routine.  This routine sends the specified packet
 * to the destination specified by "node".  A "node" value of
 * zero designates that this packet is to be broadcasted.
 *
 * @param node is the destination of this packet (0 = broadcast)
 * @param packet is the address of packet
 *
 * @return NONE
 */
rtems_mpci_entry Shm_Send_packet(
  uint32_t   node,
  rtems_packet_prefix *packet
)
{
  Shm_Envelope_control *ecb, *tmp_ecb;
  uint32_t   nnum;

  ecb = Shm_Packet_prefix_to_envelope_control_pointer( packet );
  if ( node ) {
    Shm_Build_preamble( ecb, node );
    Shm_Build_postamble( ecb );
    Shm_Append_to_receive_queue( node, ecb );
    (*Shm_Configuration->cause_intr)( node );
  }
  else {
    for( nnum = SHM_FIRST_NODE ; nnum <= SHM_MAXIMUM_NODES ; nnum++ )
      if ( rtems_object_get_local_node() != nnum ) {
        struct pkt_cpy *pkt;

        tmp_ecb = Shm_Allocate_envelope();
        if ( !tmp_ecb )
          rtems_fatal_error_occurred( SHM_NO_FREE_PKTS );
        Shm_Build_preamble( tmp_ecb, nnum );
        pkt = (struct pkt_cpy *)tmp_ecb->packet;
        *pkt = *((struct pkt_cpy *)packet);
        Shm_Build_postamble( tmp_ecb );
        Shm_Append_to_receive_queue( nnum, tmp_ecb );
        (*Shm_Configuration->cause_intr)( nnum );
      }
    Shm_Free_envelope( ecb );
  }
}