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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) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* 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
*
* $Id$
*/
#include <bsp.h>
#include <rtems.h>
#include "shm.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;
}
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