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/*  void Shm_Get_configuration( localnode, &shmcfg )

 *

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

 *  to the Shared Memory Configuration Table for the MVME147.

 *

 *  INPUT PARAMETERS:

 *    localnode - local node number

 *    shmcfg    - address of pointer to SHM Config Table

 *

 *  OUTPUT PARAMETERS:

 *    *shmcfg   - pointer to SHM Config Table

 *

 *  NOTES:  The SIGLP interrupt on the MVME147 is used as an interprocessor

 *          interrupt.

 *

 *  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.

 *

 *  MVME147 port for TNI - Telecom Bretagne

 *  by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)

 *  June 1996

 *

 *  $Id: getcfg.c,v 1.2 2001-09-27 12:00:17 chris Exp $

 */

#include <bsp.h>

#include <rtems.h>

#include "shm_driver.h"

#define INTERRUPT 1                   /* MVME147 target supports both */

#define POLLING   0                   /* polling and interrupt modes  */

shm_config_table BSP_shm_cfgtbl;

rtems_unsigned32 *BSP_int_address()

{

  rtems_unsigned32 id, offset;

  id      = (rtems_unsigned32) vme_lcsr->gcsr_base_address;

  offset  = (id << 4) & 0xF0;

  offset |= 0xffff0003; /* points to GCSR global 1 */

  return( (rtems_unsigned32 * ) offset );

}

void Shm_Get_configuration(

  rtems_unsigned32   localnode,

  shm_config_table **shmcfg

)

{

  /* A shared mem space has bee left between RAM_END and DRAM_END

   on the first node*/

  if (localnode == 1)

    BSP_shm_cfgtbl.base       = (vol_u32 *) RAM_END;

  else

    BSP_shm_cfgtbl.base       = (vol_u32 *) (DRAM_END + RAM_END);

  BSP_shm_cfgtbl.length       = DRAM_END - RAM_END;

  BSP_shm_cfgtbl.format       = SHM_BIG;

  BSP_shm_cfgtbl.cause_intr   = Shm_Cause_interrupt;

#ifdef NEUTRAL_BIG

  BSP_shm_cfgtbl.convert      = NULL_CONVERT;

#else

  BSP_shm_cfgtbl.convert      = CPU_swap_u32;

#endif

#if (POLLING==1)

  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;

#else

  BSP_shm_cfgtbl.poll_intr    = INTR_MODE;

  BSP_shm_cfgtbl.Intr.address = BSP_int_address(); /* GCSR global 1 */

  BSP_shm_cfgtbl.Intr.value   = 0x01; /* SIGLP */

  BSP_shm_cfgtbl.Intr.length  = BYTE;

#endif

  *shmcfg = &BSP_shm_cfgtbl;

}