1 | /*
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2 | * TOPPERS/JSP Kernel
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3 | * Toyohashi Open Platform for Embedded Real-Time Systems/
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4 | * Just Standard Profile Kernel
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5 | *
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6 | * Copyright (C) 2000-2004 by Embedded and Real-Time Systems Laboratory
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7 | * Toyohashi Univ. of Technology, JAPAN
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8 | *
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9 | * ä¸è¨è使¨©è
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10 | ã¯ï¼ä»¥ä¸ã® (1)ã(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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11 | * ã«ãã£ã¦å
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12 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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13 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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14 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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15 | å¸ï¼ä»¥ä¸ï¼
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16 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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17 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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18 | * 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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19 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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20 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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21 | * ç¨ã§ããå½¢ã§åé
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22 | å¸ããå ´åã«ã¯ï¼åé
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23 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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24 | * è
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25 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è使¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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26 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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27 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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28 | * ç¨ã§ããªãå½¢ã§åé
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29 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
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30 | * ã¨ï¼
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31 | * (a) åé
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32 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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33 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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34 | * 使¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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35 | * (b) åé
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36 | å¸ã®å½¢æ
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37 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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38 | * å ±åãããã¨ï¼
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39 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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40 | * 害ãããï¼ä¸è¨è使¨©è
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41 | ããã³TOPPERSããã¸ã§ã¯ããå
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42 | 責ãããã¨ï¼
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43 | *
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44 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨è使¨©è
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45 | ã
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46 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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47 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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48 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæå®³ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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49 | *
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50 | * @(#) $Id: cpu_config.h,v 1.19 2004/09/17 13:45:55 honda Exp $
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51 | */
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52 |
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53 | /*
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54 | * ããã»ããµä¾åã¢ã¸ã¥ã¼ã«ï¼ARM4vTç¨ï¼
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55 | *
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56 | * ãã®ã¤ã³ã¯ã«ã¼ããã¡ã¤ã«ã¯ï¼t_config.h ã®ã¿ããã¤ã³ã¯ã«ã¼ããããï¼
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57 | * ä»ã®ãã¡ã¤ã«ããç´æ¥ã¤ã³ã¯ã«ã¼ããã¦ã¯ãªããªãï¼
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58 | */
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59 |
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60 | #ifndef _CPU_CONFIG_H_
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61 | #define _CPU_CONFIG_H_
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62 |
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63 | /*
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64 | * ã«ã¼ãã«å
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65 | é¨èå¥åã®ãªãã¼ã
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66 | */
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67 | #include "cpu_rename.h"
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68 |
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69 | /*
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70 | * ããã»ããµã®ç¹æ®å½ä»¤ã®ã¤ã³ã©ã¤ã³é¢æ°å®ç¾©
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71 | */
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72 | #ifndef _MACRO_ONLY
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73 | #include <cpu_insn.h>
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74 | #endif /* _MACRO_ONLY */
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75 |
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76 | /*
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77 | * TCB é¢é£ã®å®ç¾©
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78 | *
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79 | * cpu_context.h ã«å
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80 | ¥ããæ¹ãã¨ã¬ã¬ã³ãã ãï¼åç
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81 | §ã®ä¾åæ§ã®é¢ä¿ã§ï¼
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82 | * cpu_context.h ã«ã¯å
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83 | ¥ããããªãï¼
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84 | */
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85 |
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86 | /*
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87 | * TCB ä¸ã®ãã£ã¼ã«ãã®ãããå¹
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88 | ã®å®ç¾©
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89 | */
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90 | #define TBIT_TCB_TSTAT 8 /* tstat ãã£ã¼ã«ãã®ãããå¹
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91 | */
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92 | #define TBIT_TCB_PRIORITY 8 /* priority ãã£ã¼ã«ãã®ãããå¹
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93 | */
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94 |
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95 | #ifndef _MACRO_ONLY
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96 | /*
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97 | * ã¿ã¹ã¯ã³ã³ããã¹ããããã¯ã®å®ç¾©
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98 | */
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99 | typedef struct task_context_block {
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100 | VP sp; /* ã¹ã¿ãã¯ãã¤ã³ã¿ */
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101 | FP pc; /* ããã°ã©ã ã«ã¦ã³ã¿ */
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102 | } CTXB;
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103 |
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104 | /*
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105 | * å²ãè¾¼ã¿ã®ãã¹ãåæ°ã®ã«ã¦ã³ã
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106 | */
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107 | extern UW interrupt_count;
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108 |
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109 |
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110 | /*
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111 | * ã·ã¹ãã ç¶æ
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112 | åç
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113 | §
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114 | */
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115 | Inline UB
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116 | current_mode()
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117 | {
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118 | return(current_sr() & CPSR_MODE_MASK);
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119 | }
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120 |
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121 | Inline BOOL
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122 | sense_context()
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123 | {
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124 | return(interrupt_count > 0);
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125 | }
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126 |
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127 | Inline BOOL
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128 | sense_lock()
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129 | {
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130 | return(current_sr() & CPSR_IRQ_BIT);
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131 | }
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132 |
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133 | #define t_sense_lock sense_lock
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134 | #define i_sense_lock sense_lock
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135 |
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136 |
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137 | /*
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138 | * CPUããã¯ã¨ãã®è§£é¤
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139 | *
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140 | */
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141 |
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142 | #define t_lock_cpu lock_cpu
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143 | #define i_lock_cpu lock_cpu
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144 | #define t_unlock_cpu unlock_cpu
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145 | #define i_unlock_cpu unlock_cpu
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146 |
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147 |
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148 | Inline void
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149 | lock_cpu()
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150 | {
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151 | disint();
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152 | }
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153 |
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154 | Inline void
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155 | unlock_cpu()
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156 | {
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157 | enaint();
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158 | }
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159 |
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160 |
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161 | /*
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162 | * ã¿ã¹ã¯ãã£ã¹ãããã£
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163 | */
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164 |
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165 | /*
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166 | * æé«åªå
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167 | é ä½ã¿ã¹ã¯ã¸ã®ãã£ã¹ãããï¼cpu_support.Sï¼
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168 | *
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169 | * dispatch ã¯ï¼ã¿ã¹ã¯ã³ã³ããã¹ãããå¼ã³åºããããµã¼ãã¹ã³ã¼ã«å¦ç
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170 | * å
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171 | ã§ï¼CPUããã¯ç¶æ
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172 | ã§å¼ã³åºããªããã°ãªããªãï¼
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173 | */
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174 | extern void dispatch(void);
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175 |
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176 |
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177 | /*
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178 | * ç¾å¨ã®ã³ã³ããã¹ããæ¨ã¦ã¦ãã£ã¹ãããï¼cpu_support.Sï¼
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179 | *
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180 | * exit_and_dispatch ã¯ï¼CPUããã¯ç¶æ
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181 | ã§å¼ã³åºããªããã°ãªããªãï¼
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182 | */
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183 | extern void exit_and_dispatch(void);
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184 |
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185 |
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186 | /*
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187 | * ä¾å¤ãã¯ã¿ã«æ¸ãè¾¼ã¾ããã¸ã£ã³ãå½ä»¤ãåç
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188 | §ããã¢ãã¬ã¹
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189 | */
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190 | extern UW * arm_vector_add[8];
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191 |
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192 |
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193 | /*
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194 | * ä¾å¤ã«å¿ãããã³ãã©ã®èµ·åçªå°
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195 | */
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196 | extern UW arm_handler_add[8];
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197 |
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198 |
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199 | /*
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200 | * CPUä¾å¤ãã³ãã©ã®è¨å®
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201 | */
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202 | extern void define_exc(EXCNO excno, FP exchdr);
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203 |
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204 |
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205 | Inline void
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206 | arm_install_handler(EXCNO excno, FP exchdr)
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207 | {
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208 | *arm_vector_add[excno] = (UW)exchdr;
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209 | }
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210 |
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211 |
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212 | /*
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213 | * CPUä¾å¤ãã³ãã©ã®åºå
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214 | ¥å£å¦ç
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215 | */
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216 |
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217 |
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218 | /*
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219 | * CPUä¾å¤ãã³ãã©ã®åºå
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220 | ¥å£å¦çã®çæãã¯ã
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221 | *
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222 | */
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223 | #define __EXCHDR_ENTRY(exchdr, stacktop) \
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224 | extern void exchdr##_entry(VP sp); \
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225 | asm(".text \n" \
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226 | #exchdr "_entry: \n" \
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227 | " ldr sp,.int_stack_"#exchdr" \n" /* ã¹ã¿ãã¯ã®åãæ¿ã */\
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228 | " sub lr,lr,#4 \n" /* undefã§ãããã§ããã? */\
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229 | " stmfd sp!, {r0 - r2,lr} \n" /* 䏿çã«int_stackã«å¾
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230 | é¿ */ \
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231 | " mrs r1, spsr \n" /* SVCã¢ã¼ãã«åãæ¿ãããã */ \
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232 | " mov r0, sp \n" /* ä¿åãã */ \
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233 | " mov r2,#0xd3 \n" /* CPSRã®æ¸ãæã(SVCã¢ã¼ãã¸)*/ \
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234 | " msr cpsr,r2 \n" \
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235 | " ldr r2,[r0,#0x0C] \n" /* load PC */\
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236 | " stmfd sp!,{r2} \n" /* Store PC */\
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237 | " stmfd sp!,{r3,ip,lr} \n" /* Store r3,ip,lr */\
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238 | " ldmfd r0!,{r2,ip,lr} \n" /* load r0,r1,r2 */\
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239 | " stmfd sp!,{r1,r2,ip,lr} \n" /* SPSR,Store r0,r1,r2 */\
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240 | " ldr r2, .interrupt_count_"#exchdr"\n" /* å¤éå²ãè¾¼ã¿ãå¤å® */\
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241 | " ldr r3, [r2] \n" \
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242 | " add r0,r3,#1 \n" \
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243 | " str r0, [r2] \n" \
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244 | " mov r0,sp \n" /* ä¾å¤ãã³ãã©ã¸ã®å¼æ° */\
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245 | " cmp r3, #0x00 \n" \
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246 | " ldreq sp,stack_"#exchdr" \n" /* ã¹ã¿ãã¯ã®å¤æ´ */\
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247 | " stmeqfd sp!,{r0} \n" /* ã¿ã¹ã¯ã¹ã¿ãã¯ã®ä¿å */\
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248 | " and r2, r1, #0xc0 \n" /* ä¾å¤çºçæã®CPUããã¯ç¶æ
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249 | (IRQ) */\
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250 | " orr r2, r2, #0x13 \n" /* ã¨FIQãç¶æ¿. SVCã¢ã¼ã */\
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251 | " msr cpsr,r2 \n" \
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252 | " bl "#exchdr" \n" /* ãã³ãã©å¼ã³åºã */\
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253 | " mrs r2, cpsr \n" /* FIQãç¶æ¿ */\
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254 | " and r2, r2, #0x40 \n" /* */\
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255 | " orr r2, r2, #0x93 \n" /* å²ãè¾¼ã¿ç¦æ¢ */\
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256 | " msr cpsr,r2 \n" \
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257 | " ldr r2,.interrupt_count_"#exchdr" \n"/* å²ãè¾¼ã¿åæ°ã */\
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258 | " ldr r1, [r2] \n" /* ãã¯ãªã¡ã³ã */\
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259 | " sub r3,r1,#1 \n"\
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260 | " str r3, [r2] \n"\
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261 | " cmp r3,#0x00 \n" /* å²ãè¾¼ã¿ãã¹ãæ°? */\
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262 | " bne return_to_task_"#exchdr" \n" \
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263 | " ldmfd sp!,{r0} \n" /* ã¿ã¹ã¯ã¹ã¿ãã¯ã®å¾©å¸° */\
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264 | " mov sp, r0 \n"\
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265 | " ldr r1, reqflg_"#exchdr" \n" /* Check reqflg */\
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266 | " ldr r0,[r1] \n"\
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267 | " cmp r0,#0 \n"\
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268 | " beq return_to_task_"#exchdr" \n"\
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269 | " mov r0,#0 \n"\
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270 | " str r0,[r1] \n" /* Clear reqflg */\
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271 | " b _kernel_ret_exc \n" /* ret_int㸠*/\
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272 | "return_to_task_"#exchdr": \n" \
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273 | " ldmfd sp!,{r1} \n" /* CPSRã®å¾©å¸°å¦ç r1 <- cpsr*/\
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274 | " mrs r2, cpsr \n" /* FIQãç¶æ¿ */\
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275 | " and r2, r2, #0x40 \n" /* */\
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276 | " and r1, r1, #~0x40 \n" /* */\
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277 | " orr r1, r1, r2 \n" /* */\
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278 | " msr spsr, r1 \n" /* å²ãè¾¼ã¿è¨±å¯ */\
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279 | " ldmfd sp!,{r0-r3,ip,lr,pc}^ \n"\
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280 | " .align 4 \n"\
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281 | ".int_stack_"#exchdr": \n"\
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282 | " .long _kernel_int_stack + 6 * 4 \n"\
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283 | "reqflg_"#exchdr": \n"\
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284 | " .long _kernel_reqflg \n"\
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285 | "stack_"#exchdr": \n"\
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286 | " .long " #stacktop " \n"\
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287 | ".interrupt_count_"#exchdr": \n"\
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288 | " .long _kernel_interrupt_count \n")
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289 |
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290 |
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291 | #define _EXCHDR_ENTRY(exchdr, stacktop) __EXCHDR_ENTRY(exchdr, stacktop)
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292 |
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293 | #define EXCHDR_ENTRY(exchdr) _EXCHDR_ENTRY(exchdr, STACKTOP)
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294 |
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295 | #define EXC_ENTRY(exchdr) exchdr##_entry
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296 |
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297 |
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298 | /*
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299 | * CPUä¾å¤ã®çºçããæã®ã·ã¹ãã ç¶æ
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300 | ã®åç
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301 | §
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302 | */
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303 |
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304 | /*
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305 | * CPUä¾å¤ã®çºçããæã®ãã£ã¹ããã
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306 | */
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307 | Inline BOOL
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308 | exc_sense_context(VP p_excinf)
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309 | {
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310 | return(interrupt_count > 1);
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311 | }
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312 |
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313 |
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314 | /*
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315 | * CPUä¾å¤ã®çºçããæã®CPUããã¯ç¶æ
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316 | ã®åç
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317 | §
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318 | */
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319 | Inline BOOL
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320 | exc_sense_lock(VP p_excinf)
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321 | {
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322 | return((*((UW *)p_excinf) & CPSR_IRQ_BIT) == CPSR_IRQ_BIT );
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323 | }
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324 |
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325 |
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326 | /*
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327 | * æªå®ç¾©ã®ä¾å¤ãå
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328 | ¥ã£ãå ´å
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329 | */
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330 | extern void undef_exception();
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331 | extern void swi_exception();
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332 | extern void prefetch_exception();
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333 | extern void data_abort_exception();
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334 | extern void irq_abort_exception();
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335 | extern void fiq_abort_exception();
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336 |
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337 |
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338 | /*
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339 | * ããã»ããµä¾åã®åæå
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340 | */
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341 | extern void cpu_initialize(void);
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342 |
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343 |
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344 | /*
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345 | * ããã»ããµä¾åã®çµäºæå¦ç
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346 | */
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347 | extern void cpu_terminate(void);
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348 |
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349 |
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350 | /*
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351 | * CPU/å²è¾¼ã¿ãã³ãã©ã®åºå
|
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352 | ¥ãå£å¦çã§ä¸æçã«ä½¿ç¨ããã¹ã¿ãã¯
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353 | */
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354 | #define INT_STACK_SIZE 6
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355 | extern UW int_stack[INT_STACK_SIZE];
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356 |
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357 |
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358 | #endif /* _MACRO_ONLY */
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359 | #endif /* _CPU_CONFIG_H_ */
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