1 | /*
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2 | * TOPPERS/ASP Kernel
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3 | * Toyohashi Open Platform for Embedded Real-Time Systems/
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4 | * Advanced Standard Profile Kernel
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5 | *
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6 | * Copyright (C) 2008-2011 by Embedded and Real-Time Systems Laboratory
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7 | * Graduate School of Information Science, Nagoya Univ., JAPAN
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8 | *
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9 | * ä¸è¨èä½æ¨©è
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10 | ã¯ï¼ä»¥ä¸ã®(1)ï½(4)ã®æ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§
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11 | * ã¢ï¼æ¬ã½ããã¦ã§ã¢ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹
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12 | * å¤ã»åé
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13 | å¸ï¼ä»¥ä¸ï¼å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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14 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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15 | * 権表示ï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãï¼ãã®ã¾ã¾ã®å½¢ã§ã½ã¼
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16 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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17 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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18 | * ç¨ã§ããå½¢ã§åé
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19 | å¸ããå ´åã«ã¯ï¼åé
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20 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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21 | * è
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22 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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23 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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24 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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25 | * ç¨ã§ããªãå½¢ã§åé
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26 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
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27 | * ã¨ï¼
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28 | * (a) åé
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29 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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30 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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31 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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32 | * (b) åé
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33 | å¸ã®å½¢æ
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34 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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35 | * å ±åãããã¨ï¼
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36 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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37 | * 害ãããï¼ä¸è¨èä½æ¨©è
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38 | ããã³TOPPERSããã¸ã§ã¯ããå
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39 | 責ãããã¨ï¼
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40 | * ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®ã¦ã¼ã¶ã¾ãã¯ã¨ã³ãã¦ã¼ã¶ããã®ãããªãç
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41 | * ç±ã«åºã¥ãè«æ±ãããï¼ä¸è¨èä½æ¨©è
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42 | ããã³TOPPERSããã¸ã§ã¯ãã
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43 | * å
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44 | 責ãããã¨ï¼
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45 | *
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46 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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47 | ã
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48 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ç¹å®ã®ä½¿ç¨ç®ç
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49 | * ã«å¯¾ããé©åæ§ãå«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§
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50 | * ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ã
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51 | * ã®è²¬ä»»ãè² ããªãï¼
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52 | *
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53 | * @(#) $Id: core_timer.c 2308 2012-01-31 12:08:18Z ertl-honda $
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54 | */
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55 |
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56 | /*
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57 | * ã¿ã¤ããã©ã¤ãï¼SYSTICç¨ï¼
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58 | */
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59 | #include <sil.h>
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60 | #include "kernel_impl.h"
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61 | #include "time_event.h"
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62 | #include "target_timer.h"
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63 |
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64 | /*
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65 | * ã¿ã¤ãã®èµ·åå¦ç
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66 | */
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67 | void
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68 | target_timer_initialize(intptr_t exinf)
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69 | {
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70 | CLOCK cyc;
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71 | uint32_t tmp;
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72 |
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73 | #ifdef SYSTIC_USE_CALIBRATION
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74 | /* CALIBRATIONã¬ã¸ã¹ã¿ã®å¤ãä½¿ç¨ */
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75 | cyc = (sil_rew_mem((void *)SYSTIC_CALIBRATION) & SYSTIC_TENMS) / 10;
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76 | #else
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77 | cyc = TO_CLOCK(TIC_NUME, TIC_DENO) - 1;
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78 | #endif /* SYSTIC_USE_CALIBRATION */
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79 |
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80 | /* åæ¢ */
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81 | tmp = sil_rew_mem((void *)SYSTIC_CONTROL_STATUS);
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82 | tmp &= ~SYSTIC_ENABLE;
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83 | sil_wrw_mem((void *)SYSTIC_CONTROL_STATUS, tmp);
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84 |
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85 | sil_wrw_mem((void *)SYSTIC_RELOAD_VALUE, cyc);
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86 | sil_wrw_mem((void *)SYSTIC_CURRENT_VALUE, cyc);
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87 |
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88 | tmp = sil_rew_mem((void *)SYSTIC_CONTROL_STATUS);
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89 |
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90 | #ifdef SYSTIC_USE_STCLK
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91 | /* å¤é¨ã¯ããã¯ã®ä½¿ç¨ */
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92 | tmp |= SYSTIC_ENABLE;
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93 | #else
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94 | /* ããã»ããµã¯ããã¯ã®ä½¿ç¨ */
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95 | tmp |= SYSTIC_ENABLE|SYSTIC_CLKSOURCE;
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96 | #endif /* SYSTIC_USE_STCLK */
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97 |
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98 | sil_wrw_mem((void *)SYSTIC_CONTROL_STATUS, tmp);
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99 | }
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100 |
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101 | /*
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102 | * ã¿ã¤ãã®åæ¢å¦ç
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103 | */
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104 | void
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105 | target_timer_terminate(intptr_t exinf)
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106 | {
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107 | /* ã¿ã¤ããåæ¢ */
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108 | sil_wrw_mem((void*)SYSTIC_CONTROL_STATUS, 0x00);
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109 | }
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110 |
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111 | /*
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112 | * ã¿ã¤ãå²è¾¼ã¿ãã³ãã©
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113 | */
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114 | void
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115 | target_timer_handler(void)
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116 | {
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117 | /* probe_int ã®ããï¼COUNTFLAGãã¯ãªã¢ */
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118 | sil_rew_mem((void *)SYSTIC_CONTROL_STATUS);
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119 |
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120 | i_begin_int(INTNO_TIMER);
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121 | signal_time(); /* ã¿ã¤ã ãã£ãã¯ã®ä¾çµ¦ */
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122 | i_end_int(INTNO_TIMER);
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123 | }
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