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: The MPCSR interrupt on the MVME136 is used as an interprocessor |
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14 | * interrupt. The capablities of the MPCSR are used to generate |
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15 | * interprocessor interrupts for up to eight nodes. |
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16 | * |
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17 | * The following table illustrates the configuration limitations: |
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18 | * |
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19 | * BUS MAX |
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20 | * MODE ENDIAN NODES |
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21 | * ========= ====== ======= |
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22 | * POLLED LITTLE 2+ |
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23 | * INTERRUPT LITTLE 2-8 |
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24 | * |
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25 | * COPYRIGHT (c) 1989-1997. |
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26 | * On-Line Applications Research Corporation (OAR). |
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27 | * Copyright assigned to U.S. Government, 1994. |
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28 | * |
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29 | * The license and distribution terms for this file may be |
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30 | * found in the file LICENSE in this distribution or at |
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31 | * http://www.OARcorp.com/rtems/license.html. |
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32 | * |
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33 | * $Id$ |
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34 | */ |
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35 | |
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36 | #include <rtems.h> |
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37 | #include "shm.h" |
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38 | |
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39 | #define INTERRUPT 1 /* MVME136 target supports both */ |
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40 | #define POLLING 0 /* polling and interrupt modes */ |
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41 | |
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42 | shm_config_table BSP_shm_cfgtbl; |
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43 | |
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44 | rtems_unsigned32 *BSP_int_address() |
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45 | { |
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46 | rtems_unsigned32 id, offset; |
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47 | |
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48 | id = (rtems_unsigned32) *(rtems_unsigned8 *)0xfffb0061; |
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49 | offset = ((id & 0x1f) << 5) | ((id & 0xe0) << 8); |
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50 | offset |= 0xffff000b; |
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51 | return( (rtems_unsigned32 * ) offset ); |
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52 | } |
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53 | |
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54 | void Shm_Get_configuration( |
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55 | rtems_unsigned32 localnode, |
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56 | shm_config_table **shmcfg |
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57 | ) |
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58 | { |
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59 | BSP_shm_cfgtbl.base = (rtems_unsigned32 *)0x20000000; |
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60 | BSP_shm_cfgtbl.length = 1 * MEGABYTE; |
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61 | BSP_shm_cfgtbl.format = SHM_BIG; |
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62 | |
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63 | BSP_shm_cfgtbl.cause_intr = Shm_Cause_interrupt; |
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64 | |
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65 | #ifdef NEUTRAL_BIG |
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66 | BSP_shm_cfgtbl.convert = NULL_CONVERT; |
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67 | #else |
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68 | BSP_shm_cfgtbl.convert = CPU_swap_u32; |
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69 | #endif |
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70 | |
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71 | #if (POLLING==1) |
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72 | BSP_shm_cfgtbl.poll_intr = POLLED_MODE; |
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73 | BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT; |
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74 | BSP_shm_cfgtbl.Intr.value = NO_INTERRUPT; |
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75 | BSP_shm_cfgtbl.Intr.length = NO_INTERRUPT; |
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76 | #else |
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77 | BSP_shm_cfgtbl.poll_intr = INTR_MODE; |
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78 | BSP_shm_cfgtbl.Intr.address = BSP_int_address(); |
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79 | BSP_shm_cfgtbl.Intr.value = 0x80; |
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80 | BSP_shm_cfgtbl.Intr.length = BYTE; |
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81 | #endif |
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82 | |
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83 | *shmcfg = &BSP_shm_cfgtbl; |
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84 | |
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85 | } |
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