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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 HP PA-RISC

 *  simulator.

 *

 *  INPUT PARAMETERS:

 *    localnode - local node number

 *    shmcfg    - address of pointer to SHM Config Table

 *

 *  OUTPUT PARAMETERS:

 *    *shmcfg   - pointer to SHM Config Table

 *

 *  NOTES:  The MP interrupt used is the Runway bus' ability to directly

 *          address the control registers of up to four CPUs and cause

 *          interrupts on them.

 *

 *          The following table illustrates the configuration limitations:

 *

 *                                   BUS     MAX

 *                          MODE    ENDIAN  NODES

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

 *                         POLLED    BIG    2+

 *                        INTERRUPT  BIG    2..4 (on Runway)

 *

 *  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 11:59:45 chris Exp $

 */

#include <bsp.h>

#include <shm_driver.h>

#define INTERRUPT 0        /* can be interrupt or polling */

#define POLLING   1

#define HPPA_RUNWAY_PROC_HPA_BASE  ((void *) 0xFFFA0000)

/* given a processor number, where is its HPA? */

#define HPPA_RUNWAY_HPA(cpu)   \

  ((rtems_unsigned32) (HPPA_RUNWAY_PROC_HPA_BASE + ((cpu) * 0x2000)))

#define HPPA_RUNWAY_REG_IO_EIR_OFFSET   0x000

shm_config_table BSP_shm_cfgtbl;

extern void Shm_Cause_interrupt_pxfl( rtems_unsigned32 node );

void Shm_Get_configuration(

  rtems_unsigned32   localnode,

  shm_config_table **shmcfg

)

{

   BSP_shm_cfgtbl.base         = (vol_u32 *) 0x44000000;

   BSP_shm_cfgtbl.length       = 16 * KILOBYTE;

   BSP_shm_cfgtbl.format       = SHM_BIG;

   BSP_shm_cfgtbl.cause_intr   = Shm_Cause_interrupt_pxfl;

#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 =

        (vol_u32 *) (HPPA_RUNWAY_HPA( localnode - 1) +

                     HPPA_RUNWAY_REG_IO_EIR_OFFSET);

   BSP_shm_cfgtbl.Intr.value   = HPPA_INTERRUPT_EXTERNAL_MPCI;

   BSP_shm_cfgtbl.Intr.length  = LONG;

#endif

   *shmcfg = &BSP_shm_cfgtbl;

}