[ac7d5ef0] | 1 | /* void Shm_Get_configuration( localnode, &shmcfg ) |
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| 2 | * |
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| 3 | * This routine initializes, if necessary, and returns a pointer |
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| 4 | * to the Shared Memory Configuration Table for the Cyclone CVME961. |
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| 5 | * |
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| 6 | * INPUT PARAMETERS: |
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| 7 | * localnode - local node number |
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| 8 | * shmcfg - address of pointer to SHM Config Table |
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| 9 | * |
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| 10 | * OUTPUT PARAMETERS: |
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| 11 | * *shmcfg - pointer to SHM Config Table |
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| 12 | * |
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| 13 | * NOTES: CVME961 target system has onboard dual-ported memory. This |
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| 14 | * file uses the USE_ONBOARD_RAM macro to determine if this |
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| 15 | * RAM is to be used as the SHM. If so (i.e. USE_ONBOARD_RAM |
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| 16 | * is set to 1), it is assumed that the master node's dual |
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| 17 | * ported memory will be used and that it is configured |
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| 18 | * correctly. The node owning the memory CANNOT access it |
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| 19 | * using a local address. The "if" insures that the MASTER |
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| 20 | * node uses a local address to access the dual-ported memory. |
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| 21 | * |
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| 22 | * The interprocessor interrupt used on the CVME961 is generated |
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| 23 | * by the VIC068. The ICMS capablities of the VIC068 are used |
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| 24 | * to generate interprocessor interrupts for up to eight nodes. |
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| 25 | * |
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| 26 | * The following table illustrates the configuration limitations: |
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| 27 | * |
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| 28 | * BUS MAX |
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| 29 | * MODE ENDIAN NODES |
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| 30 | * ========= ====== ======= |
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| 31 | * POLLED LITTLE 2+ |
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| 32 | * INTERRUPT LITTLE 2-8 |
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| 33 | * |
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| 34 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 35 | * On-Line Applications Research Corporation (OAR). |
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| 36 | * All rights assigned to U.S. Government, 1994. |
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| 37 | * |
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| 38 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 39 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 40 | * notice must appear in all copies of this file and its derivatives. |
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| 41 | * |
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| 42 | * $Id$ |
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| 43 | */ |
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| 44 | |
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| 45 | #include <rtems.h> |
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| 46 | #include "shm.h" |
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| 47 | |
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| 48 | #define USE_ONBOARD_RAM 0 /* use onboard (1) or VME RAM */ |
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| 49 | /* for SHM communications */ |
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| 50 | |
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| 51 | #define INTERRUPT 1 /* CVME961 target supports both */ |
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| 52 | #define POLLING 0 /* polling and interrupt modes */ |
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| 53 | |
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| 54 | |
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| 55 | shm_config_table BSP_shm_cfgtbl; |
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| 56 | |
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| 57 | void Shm_Get_configuration( |
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| 58 | rtems_unsigned32 localnode, |
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| 59 | shm_config_table **shmcfg |
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| 60 | ) |
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| 61 | { |
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| 62 | #if ( USE_ONBOARD_RAM == 1 ) |
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| 63 | if ( Shm_RTEMS_MP_Configuration->node == MASTER ) |
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| 64 | BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x00300000; |
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| 65 | else |
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| 66 | BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x10300000; |
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| 67 | #else |
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| 68 | BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x20000000; |
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| 69 | #endif |
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| 70 | |
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| 71 | BSP_shm_cfgtbl.length = 1 * MEGABYTE; |
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| 72 | BSP_shm_cfgtbl.format = SHM_LITTLE; |
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| 73 | |
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| 74 | BSP_shm_cfgtbl.cause_intr = Shm_Cause_interrupt; |
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| 75 | |
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| 76 | #ifdef NEUTRAL_BIG |
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| 77 | BSP_shm_cfgtbl.convert = (void *)CPU_swap_u32; |
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| 78 | #else |
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| 79 | BSP_shm_cfgtbl.convert = NULL_CONVERT; |
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| 80 | #endif |
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| 81 | |
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| 82 | #if (POLLING==1) |
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| 83 | BSP_shm_cfgtbl.poll_intr = POLLED_MODE; |
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| 84 | BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT; |
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| 85 | BSP_shm_cfgtbl.Intr.value = NO_INTERRUPT; |
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| 86 | BSP_shm_cfgtbl.Intr.length = NO_INTERRUPT; |
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| 87 | #else |
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| 88 | BSP_shm_cfgtbl.poll_intr = INTR_MODE; |
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| 89 | BSP_shm_cfgtbl.Intr.address = |
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| 90 | (rtems_unsigned32 *) (0xffff0021|((localnode-1) << 12)); |
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| 91 | /* use ICMS0 */ |
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| 92 | BSP_shm_cfgtbl.Intr.value = 1; |
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| 93 | BSP_shm_cfgtbl.Intr.length = BYTE; |
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| 94 | #endif |
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| 95 | |
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| 96 | *shmcfg = &BSP_shm_cfgtbl; |
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| 97 | |
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| 98 | } |
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