Subversion Repositories openrisc_2011-10-31

/*  void Shm_get_config( localnode, &shmcfg )

 *

 *  This routine initializes, if necessary, and returns a pointer

 *  to the Shared Memory Configuration Table for the UNIX

 *  simulator.

 *

 *  INPUT PARAMETERS:

 *    localnode - local node number

 *    shmcfg    - address of pointer to SHM Config Table

 *

 *  OUTPUT PARAMETERS:

 *    *shmcfg   - pointer to SHM Config Table

 *

 *  NOTES:  This driver is capable of supporting a practically unlimited

 *          number of nodes.

 *

 *  COPYRIGHT (c) 1989-1999.

 *  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.OARcorp.com/rtems/license.html.

 *

 *  $Id: getcfg.c,v 1.2 2001-09-27 12:01:15 chris Exp $

 */

#include <bsp.h>

#include <shm_driver.h>

#include <sys/types.h>    /* pid_t */

shm_config_table BSP_shm_cfgtbl;

int semid;

void Shm_Cause_interrupt_unix(

  rtems_unsigned32 node

);

void Shm_Get_configuration(

  rtems_unsigned32   localnode,

  shm_config_table **shmcfg

)

{

  _CPU_SHM_Init(

    Shm_Maximum_nodes,

    Shm_Is_master_node(),

    (void **)&BSP_shm_cfgtbl.base,

    (unsigned32 *)&BSP_shm_cfgtbl.length

  );

  BSP_shm_cfgtbl.format       = SHM_BIG;

  BSP_shm_cfgtbl.cause_intr   = Shm_Cause_interrupt_unix;

#ifdef NEUTRAL_BIG

  BSP_shm_cfgtbl.convert      = NULL_CONVERT;

#else

  BSP_shm_cfgtbl.convert      = CPU_swap_u32;

#endif

  if ( _CPU_SHM_Get_vector() ) {

    BSP_shm_cfgtbl.poll_intr    = INTR_MODE;

    BSP_shm_cfgtbl.Intr.address = (vol_u32 *) _CPU_Get_pid(); /* process id */

    BSP_shm_cfgtbl.Intr.value   = _CPU_SHM_Get_vector();  /* signal to send */

    BSP_shm_cfgtbl.Intr.length  = LONG;

  } else {

    BSP_shm_cfgtbl.poll_intr    = POLLED_MODE;

    BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT;

    BSP_shm_cfgtbl.Intr.value   = NO_INTERRUPT;

    BSP_shm_cfgtbl.Intr.length  = NO_INTERRUPT;

  }

  *shmcfg = &BSP_shm_cfgtbl;

}