1 | /* bspstart.c |
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2 | * |
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3 | * This set of routines starts the application. It includes application, |
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4 | * board, and monitor specific initialization and configuration. |
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5 | * The generic CPU dependent initialization has been performed |
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6 | * before this routine is invoked. |
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7 | * |
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8 | * COPYRIGHT (c) 1989-2007. |
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9 | * On-Line Applications Research Corporation (OAR). |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.org/license/LICENSE. |
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14 | * |
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15 | * Modifications for MBX860: |
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16 | * Copyright (c) 1999, National Research Council of Canada |
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17 | */ |
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18 | |
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19 | #include <bsp.h> |
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20 | |
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21 | /* |
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22 | * Driver configuration parameters |
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23 | */ |
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24 | uint32_t bsp_clicks_per_usec; |
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25 | uint32_t bsp_serial_per_sec; /* Serial clocks per second */ |
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26 | bool bsp_serial_external_clock; |
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27 | bool bsp_serial_xon_xoff; |
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28 | bool bsp_serial_cts_rts; |
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29 | uint32_t bsp_serial_rate; |
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30 | uint32_t bsp_timer_average_overhead; /* Average overhead of timer in ticks */ |
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31 | uint32_t bsp_timer_least_valid; /* Least valid number from timer */ |
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32 | bool bsp_timer_internal_clock; /* TRUE, when timer runs with CPU clk */ |
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33 | |
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34 | /* |
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35 | * bsp_start() |
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36 | * |
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37 | * Board-specific initialization code. Called from the generic boot_card() |
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38 | * function defined in rtems/c/src/lib/libbsp/shared/main.c. That function |
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39 | * does some of the board independent initialization. It is called from the |
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40 | * MBX8xx entry point _start() defined in |
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41 | * rtems/c/src/lib/libbsp/powerpc/mbx8xx/startup/start.S |
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42 | * |
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43 | * _start() has set up a stack, has zeroed the .bss section, has turned off |
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44 | * interrupts, and placed the processor in the supervisor mode. boot_card() |
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45 | * has left the processor in that state when bsp_start() was called. |
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46 | * |
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47 | * RUNS WITH ADDRESS TRANSLATION AND CACHING TURNED OFF! |
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48 | * ASSUMES THAT THE VIRTUAL ADDRESSES WILL BE IDENTICAL TO THE PHYSICAL |
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49 | * ADDRESSES. Software-controlled address translation would be required |
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50 | * otherwise. |
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51 | * |
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52 | * Input parameters: NONE |
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53 | * |
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54 | * Output parameters: NONE |
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55 | * |
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56 | * Return values: NONE |
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57 | */ |
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58 | void bsp_start(void) |
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59 | { |
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60 | uint32_t r1; |
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61 | |
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62 | mmu_init(); |
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63 | |
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64 | /* |
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65 | * Enable instruction and data caches. Do not force writethrough mode. |
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66 | */ |
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67 | #ifdef INSTRUCTION_CACHE_ENABLE |
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68 | r1 = M8xx_CACHE_CMD_ENABLE; |
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69 | _mtspr( M8xx_IC_CST, r1 ); |
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70 | _isync; |
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71 | #endif |
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72 | |
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73 | /* |
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74 | * Warning: EPPCBug 1.1 chokes to death if the data cache is turned on. |
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75 | * Set DATA_CACHE_ENABLE to zero in mbx8xx.cfg if EPPCBUG is used. |
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76 | */ |
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77 | #ifdef DATA_CACHE_ENABLE |
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78 | r1 = M8xx_CACHE_CMD_ENABLE; |
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79 | _mtspr( M8xx_DC_CST, r1 ); |
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80 | _isync; |
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81 | #endif |
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82 | |
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83 | /* |
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84 | * initialize the device driver parameters |
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85 | */ |
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86 | bsp_clicks_per_usec = 1; /* for 4MHz extclk */ |
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87 | bsp_serial_per_sec = 10000000; |
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88 | bsp_serial_external_clock = 1; |
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89 | bsp_serial_xon_xoff = 0; |
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90 | bsp_serial_cts_rts = 1; |
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91 | bsp_serial_rate = 9600; |
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92 | #if ( defined(mbx821_001) || defined(mbx821_001b) || defined(mbx860_001b) ) |
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93 | bsp_clock_speed = 50000000; |
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94 | bsp_timer_average_overhead = 3; |
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95 | bsp_timer_least_valid = 3; |
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96 | #else |
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97 | bsp_clock_speed = 40000000; |
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98 | bsp_timer_average_overhead = 3; |
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99 | bsp_timer_least_valid = 3; |
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100 | #endif |
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101 | |
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102 | m8xx.scc2.sccm=0; |
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103 | m8xx.scc2p.rbase=0; |
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104 | m8xx.scc2p.tbase=0; |
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105 | m8xx_cp_execute_cmd( M8xx_CR_OP_STOP_TX | M8xx_CR_CHAN_SCC2 ); |
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106 | } |
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107 | |
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