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unneback |
/* void Shm_Get_configuration( localnode, &shmcfg )
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*
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* This routine initializes, if necessary, and returns a pointer
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* to the Shared Memory Configuration Table for the Cyclone CVME961.
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*
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* INPUT PARAMETERS:
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* localnode - local node number
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* shmcfg - address of pointer to SHM Config Table
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*
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* OUTPUT PARAMETERS:
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* *shmcfg - pointer to SHM Config Table
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*
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* NOTES: CVME961 target system has onboard dual-ported memory. This
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* file uses the USE_ONBOARD_RAM macro to determine if this
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* RAM is to be used as the SHM. If so (i.e. USE_ONBOARD_RAM
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* is set to 1), it is assumed that the master node's dual
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* ported memory will be used and that it is configured
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* correctly. The node owning the memory CANNOT access it
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* using a local address. The "if" insures that the MASTER
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* node uses a local address to access the dual-ported memory.
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*
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* The interprocessor interrupt used on the CVME961 is generated
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* by the VIC068. The ICMS capablities of the VIC068 are used
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* to generate interprocessor interrupts for up to eight nodes.
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*
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* The following table illustrates the configuration limitations:
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*
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* BUS MAX
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* MODE ENDIAN NODES
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* ========= ====== =======
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* POLLED LITTLE 2+
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* INTERRUPT LITTLE 2-8
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*
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* COPYRIGHT (c) 1989-1997.
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* On-Line Applications Research Corporation (OAR).
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* Copyright assigned to U.S. Government, 1994.
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*
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* The license and distribution terms for this file may in
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* the file LICENSE in this distribution or at
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* http://www.OARcorp.com/rtems/license.html.
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*
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* $Id: getcfg.c,v 1.2 2001-09-27 11:59:59 chris Exp $
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*/
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#include <rtems.h>
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#include "shm_driver.h"
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#define USE_ONBOARD_RAM 0 /* use onboard (1) or VME RAM */
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/* for SHM communications */
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#define INTERRUPT 1 /* CVME961 target supports both */
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#define POLLING 0 /* polling and interrupt modes */
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shm_config_table BSP_shm_cfgtbl;
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void Shm_Get_configuration(
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rtems_unsigned32 localnode,
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shm_config_table **shmcfg
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)
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{
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#if ( USE_ONBOARD_RAM == 1 )
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if ( Shm_RTEMS_MP_Configuration->node == MASTER )
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BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x00300000;
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else
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BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x10300000;
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#else
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BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x20000000;
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#endif
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BSP_shm_cfgtbl.length = 1 * MEGABYTE;
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BSP_shm_cfgtbl.format = SHM_LITTLE;
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BSP_shm_cfgtbl.cause_intr = Shm_Cause_interrupt;
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#ifdef NEUTRAL_BIG
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BSP_shm_cfgtbl.convert = (void *)CPU_swap_u32;
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#else
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BSP_shm_cfgtbl.convert = NULL_CONVERT;
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#endif
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#if (POLLING==1)
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BSP_shm_cfgtbl.poll_intr = POLLED_MODE;
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BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT;
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BSP_shm_cfgtbl.Intr.value = NO_INTERRUPT;
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BSP_shm_cfgtbl.Intr.length = NO_INTERRUPT;
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#else
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BSP_shm_cfgtbl.poll_intr = INTR_MODE;
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BSP_shm_cfgtbl.Intr.address =
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(rtems_unsigned32 *) (0xffff0021|((localnode-1) << 12));
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/* use ICMS0 */
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BSP_shm_cfgtbl.Intr.value = 1;
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BSP_shm_cfgtbl.Intr.length = BYTE;
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#endif
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| 95 |
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| 96 |
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*shmcfg = &BSP_shm_cfgtbl;
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| 97 |
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}
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