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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [i960/] [rxgen960/] [shmsupp/] [getcfg.c] - Rev 30
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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: CVME961 target system has onboard dual-ported memory. This * file uses the USE_ONBOARD_RAM macro to determine if this * RAM is to be used as the SHM. If so (i.e. USE_ONBOARD_RAM * is set to 1), it is assumed that the master node's dual * ported memory will be used and that it is configured * correctly. The node owning the memory CANNOT access it * using a local address. The "if" insures that the MASTER * node uses a local address to access the dual-ported memory. * * The interprocessor interrupt used on the CVME961 is generated * by the VIC068. The ICMS capablities of the VIC068 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) 1989-1997. * On-Line Applications Research Corporation (OAR). * Copyright assigned to U.S. Government, 1994. * * The license and distribution terms for this file may 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 11:59:59 chris Exp $ */ #include <rtems.h> #include "shm_driver.h" #define USE_ONBOARD_RAM 0 /* use onboard (1) or VME RAM */ /* for SHM communications */ #define INTERRUPT 1 /* CVME961 target supports both */ #define POLLING 0 /* polling and interrupt modes */ shm_config_table BSP_shm_cfgtbl; void Shm_Get_configuration( rtems_unsigned32 localnode, shm_config_table **shmcfg ) { #if ( USE_ONBOARD_RAM == 1 ) if ( Shm_RTEMS_MP_Configuration->node == MASTER ) BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x00300000; else BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x10300000; #else BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x20000000; #endif BSP_shm_cfgtbl.length = 1 * MEGABYTE; BSP_shm_cfgtbl.format = SHM_LITTLE; BSP_shm_cfgtbl.cause_intr = Shm_Cause_interrupt; #ifdef NEUTRAL_BIG BSP_shm_cfgtbl.convert = (void *)CPU_swap_u32; #else BSP_shm_cfgtbl.convert = NULL_CONVERT; #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 = (rtems_unsigned32 *) (0xffff0021|((localnode-1) << 12)); /* use ICMS0 */ BSP_shm_cfgtbl.Intr.value = 1; BSP_shm_cfgtbl.Intr.length = BYTE; #endif *shmcfg = &BSP_shm_cfgtbl; }
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