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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 Cyclone CVME961.

 *

 *  INPUT PARAMETERS:

 *    localnode - local node number

 *    shmcfg    - address of pointer to SHM Config Table

 *

 *  OUTPUT PARAMETERS:

 *    *shmcfg   - pointer to SHM Config Table

 *

 *  NOTES:  The MPCSR interrupt on the MVME136 is used as an interprocessor

 *          interrupt.   The capablities of the MPCSR are used to generate

 *          interprocessor interrupts for up to eight nodes.

 *

 *          The following table illustrates the configuration limitations:

 *

 *                                   BUS     MAX

 *                          MODE    ENDIAN  NODES

 *                        ========= ====== =======

 *                         POLLED   LITTLE  2+

 *                        INTERRUPT LITTLE  2-8

 *

 *  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 12:00:14 chris Exp $

 */

#include <rtems.h>

#include "shm_driver.h"

#define INTERRUPT 1                   /* MVME136 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) *(rtems_unsigned8 *)0xfffb0061;

  offset  = ((id & 0x1f) << 5) | ((id & 0xe0) << 8);

  offset |= 0xffff000b;

  return( (rtems_unsigned32 * ) offset );

}

void Shm_Get_configuration(

  rtems_unsigned32   localnode,

  shm_config_table **shmcfg

)

{

   BSP_shm_cfgtbl.base         = (rtems_unsigned32 *)0x20000000;

   BSP_shm_cfgtbl.length       = 1 * MEGABYTE;

   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();

   BSP_shm_cfgtbl.Intr.value   = 0x80;

   BSP_shm_cfgtbl.Intr.length  = BYTE;

#endif

   *shmcfg = &BSP_shm_cfgtbl;

}