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 MVME147. |
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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 SIGLP interrupt on the MVME147 is used as an interprocessor |
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14 | * interrupt. |
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15 | * |
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16 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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17 | * On-Line Applications Research Corporation (OAR). |
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18 | * All rights assigned to U.S. Government, 1994. |
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19 | * |
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20 | * This material may be reproduced by or for the U.S. Government pursuant |
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21 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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22 | * notice must appear in all copies of this file and its derivatives. |
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23 | * |
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24 | * MVME147 port for TNI - Telecom Bretagne |
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25 | * by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr) |
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26 | * June 1996 |
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27 | * |
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28 | * $Id$ |
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29 | */ |
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30 | |
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31 | #include <bsp.h> |
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32 | #include <rtems.h> |
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33 | #include "shm.h" |
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34 | |
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35 | #define INTERRUPT 1 /* MVME147 target supports both */ |
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36 | #define POLLING 0 /* polling and interrupt modes */ |
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37 | |
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38 | shm_config_table BSP_shm_cfgtbl; |
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39 | |
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40 | rtems_unsigned32 *BSP_int_address() |
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41 | { |
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42 | rtems_unsigned32 id, offset; |
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43 | |
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44 | id = (rtems_unsigned32) vme_lcsr->gcsr_base_address; |
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45 | offset = (id << 4) & 0xF0; |
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46 | offset |= 0xffff0003; /* points to GCSR global 1 */ |
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47 | return( (rtems_unsigned32 * ) offset ); |
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48 | } |
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49 | |
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50 | void Shm_Get_configuration( |
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51 | rtems_unsigned32 localnode, |
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52 | shm_config_table **shmcfg |
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53 | ) |
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54 | { |
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55 | /* A shared mem space has bee left between RAM_END and DRAM_END |
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56 | on the first node*/ |
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57 | if (localnode == 1) |
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58 | BSP_shm_cfgtbl.base = RAM_END; |
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59 | else |
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60 | BSP_shm_cfgtbl.base = DRAM_END + RAM_END; |
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61 | BSP_shm_cfgtbl.length = DRAM_END - RAM_END; |
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62 | BSP_shm_cfgtbl.format = SHM_BIG; |
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63 | |
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64 | BSP_shm_cfgtbl.cause_intr = Shm_Cause_interrupt; |
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65 | |
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66 | #ifdef NEUTRAL_BIG |
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67 | BSP_shm_cfgtbl.convert = NULL_CONVERT; |
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68 | #else |
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69 | BSP_shm_cfgtbl.convert = CPU_swap_u32; |
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70 | #endif |
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71 | |
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72 | #if (POLLING==1) |
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73 | BSP_shm_cfgtbl.poll_intr = POLLED_MODE; |
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74 | BSP_shm_cfgtbl.Intr.address = NO_INTERRUPT; |
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75 | BSP_shm_cfgtbl.Intr.value = NO_INTERRUPT; |
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76 | BSP_shm_cfgtbl.Intr.length = NO_INTERRUPT; |
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77 | #else |
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78 | BSP_shm_cfgtbl.poll_intr = INTR_MODE; |
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79 | BSP_shm_cfgtbl.Intr.address = BSP_int_address(); /* GCSR global 1 */ |
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80 | BSP_shm_cfgtbl.Intr.value = 0x01; /* SIGLP */ |
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81 | BSP_shm_cfgtbl.Intr.length = BYTE; |
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82 | #endif |
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83 | |
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84 | *shmcfg = &BSP_shm_cfgtbl; |
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85 | |
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86 | } |
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