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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.
*
* $Id$
*/
#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;
}
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