[353] | 1 | /*
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| 2 | * TOPPERS/SSP Kernel
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| 3 | * Smallest Set Profile Kernel
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| 4 | *
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| 5 | * Copyright (C) 2008 by Embedded and Real-Time Systems Laboratory
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| 6 | * Graduate School of Information Science, Nagoya Univ., JAPAN
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| 7 | * Copyright (C) 2018 by Naoki Saito
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| 8 | * Nagoya Municipal Industrial Research Institute, JAPAN
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| 9 | *
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| 10 | * ä¸è¨èä½æ¨©è
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| 11 | ã¯ï¼ä»¥ä¸ã®(1)ã(4)ã®æ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§
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| 12 | * ã¢ï¼æ¬ã½ããã¦ã§ã¢ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹
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| 13 | * å¤ã»åé
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| 14 | å¸ï¼ä»¥ä¸ï¼å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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| 15 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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| 16 | * 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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| 17 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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| 18 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 19 | * ç¨ã§ããå½¢ã§åé
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| 20 | å¸ããå ´åã«ã¯ï¼åé
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| 21 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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| 22 | * è
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| 23 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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| 24 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 25 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 26 | * ç¨ã§ããªãå½¢ã§åé
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| 27 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
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| 28 | * ã¨ï¼
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| 29 | * (a) åé
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| 30 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 31 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 32 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 33 | * (b) åé
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| 34 | å¸ã®å½¢æ
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| 35 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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| 36 | * å ±åãããã¨ï¼
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| 37 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 38 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 39 | ããã³TOPPERSããã¸ã§ã¯ããå
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| 40 | 責ãããã¨ï¼
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| 41 | * ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®ã¦ã¼ã¶ã¾ãã¯ã¨ã³ãã¦ã¼ã¶ããã®ãããªãç
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| 42 | * ç±ã«åºã¥ãè«æ±ãããï¼ä¸è¨èä½æ¨©è
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| 43 | ããã³TOPPERSããã¸ã§ã¯ãã
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| 44 | * å
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| 45 | 責ãããã¨ï¼
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| 46 | *
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| 47 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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| 48 | ã
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| 49 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ç¹å®ã®ä½¿ç¨ç®ç
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| 50 | * ã«å¯¾ããé©åæ§ãå«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§
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| 51 | * ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ã
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| 52 | * ã®è²¬ä»»ãè² ããªãï¼
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| 53 | *
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| 54 | */
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| 55 |
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| 56 | /*
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| 57 | * ããã»ããµä¾åã¢ã¸ã¥ã¼ã« ã¢ã»ã³ããªè¨èªé¨ï¼ARM64ç¨ï¼
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| 58 | */
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| 59 |
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| 60 | #define TOPPERS_MACRO_ONLY
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| 61 | #define UINT_C(val) (val) /* uint_tåã®å®æ°ãä½ããã¯ã */
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| 62 | #define ULONG_C(val) (val) /* ulong_tåã®å®æ°ãä½ããã¯ã */
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| 63 | #define CAST(type, val) (val) /* åãã£ã¹ããè¡ããã¯ã */
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| 64 |
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| 65 | #include "kernel_impl.h"
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| 66 |
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| 67 | /*
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| 68 | * ãã£ã¹ãããã£ã®åä½éå§
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| 69 | */
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| 70 | .text
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| 71 | .align 2
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| 72 | .globl start_dispatch
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| 73 | .type start_dispatch, function
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| 74 | start_dispatch:
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| 75 | /*
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| 76 | * ãã®ã«ã¼ãã³ã¯ï¼ã«ã¼ãã«èµ·åæã«ï¼ãã¹ã¦ã®å²è¾¼ã¿ãç¦æ¢ããç¶æ
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| 77 |
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| 78 | * ï¼å²è¾¼ã¿ããã¯ç¶æ
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| 79 | ã¨åçï¼ã§å¼ã³åºãããï¼
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| 80 | *
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| 81 | * ããã§ã¯ dispatcher ãå¼ã³åºãåã®åæè¨å®ãè¡ãï¼
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| 82 | * (1) ã·ã¹ãã ç¶æ
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| 83 | ã®åæåï¼ä»¥ä¸ã®ç¶æ
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| 84 | ã¸ç§»è¡ããï¼
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| 85 | * ã»å
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| 86 | ¨å²è¾¼ã¿ããã¯è§£é¤ç¶æ
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| 87 | (ã«ã¼ãã«ç®¡çå¤ã®å²è¾¼ã¿è¨±å¯)
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| 88 | * ã»CPUããã¯ç¶æ
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| 89 | (ã«ã¼ãã«ç®¡çã®å²è¾¼ã¿ç¦æ¢)
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| 90 | * ã»å²è¾¼ã¿åªå
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| 91 | 度ãã¹ã¯å
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| 92 | ¨è§£é¤ç¶æ
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| 93 |
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| 94 | * ã»ãã£ã¹ããã許å¯ç¶æ
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| 95 |
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| 96 | *
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| 97 | * (1-1) å²è¾¼ã¿åªå
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| 98 | 度ãã¹ã¯ã¯ gicc_initializeã§ï¼GICC_PMR ãåæåãããã¨ã«ãã
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| 99 | * ãã§ã«ï¼ã¢ãã«ä¸ã®ï¼å²è¾¼ã¿åªå
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| 100 | 度ãã¹ã¯å
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| 101 | ¨è§£é¤ç¶æ
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| 102 | ã«ãªã£ã¦ããï¼
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| 103 | * (1-2) ãã£ã¹ãããç¦æ¢ãã©ã°ã¯ task_initialize 㧠disdsp ã false ã«åæåãã¦ãããã
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| 104 | * ãã§ã«ãã£ã¹ããã許å¯ç¶æ
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| 105 | ã«ãªã£ã¦ããï¼
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| 106 | * (1-3) ããã§ã¯ã«ã¼ãã«ç®¡çã®å²è¾¼ã¿ãç¦æ¢ããï¼
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| 107 | *
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| 108 | * (2) ã¹ã¿ãã¯ãã¤ã³ã¿ã®åæå
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| 109 | * start_dispatch ãå¼ã³åºãããã¨ããã«æ»ã£ã¦ãããã¨ã¯ãªããã
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| 110 | * ã¹ã¿ãã¯ãã¤ã³ã¿ãããã§åæåããï¼
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| 111 | */
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| 112 | ldr x0, =_kernel_istkpt // setup stack
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| 113 | ldr x0, [x0]
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| 114 | mov sp, x0
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| 115 |
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| 116 | // ã«ã¼ãã«ç®¡çå
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| 117 | ã®å²è¾¼ã¿ç¦æ¢
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| 118 | msr daifset, #3
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| 119 |
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| 120 | // dispatcherå¼ã³åºã
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| 121 | b dispatcher
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| 122 |
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| 123 | /*
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| 124 | * ã«ã¼ãã«ã®çµäºå¦çã®å¼åºã
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| 125 | *
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| 126 | * ã¹ã¿ãã¯ãéã¿ã¹ã¯ã³ã³ããã¹ãç¨ã«åãæ¿ãï¼
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| 127 | *
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| 128 | */
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| 129 | .text
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| 130 | .align 2
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| 131 | .globl call_exit_kernel
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| 132 | .type call_exit_kernel, function
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| 133 | call_exit_kernel:
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| 134 | /*
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| 135 | * ã¹ã¿ãã¯ãã¤ã³ã¿ã®åæå
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| 136 | */
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| 137 | ldr x0, =_kernel_istkpt
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| 138 | ldr x0, [x0]
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| 139 | mov sp, x0
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| 140 |
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| 141 | b exit_kernel /* ã«ã¼ãã«ã®çµäºå¦çãå¼ã¶ */
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| 142 |
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| 143 |
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| 144 | /*
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| 145 | * å²è¾¼ã¿/ä¾å¤ã³ã³ããã¹ãä¿åå¦ç
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| 146 | */
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| 147 | .macro __save_context
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| 148 | /*
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| 149 | * x0 - x29 ã®ä¿å(x0,x1ãã¢ããx28, x29ã¾ã§)
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| 150 | */
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| 151 | stp x1, x0, [sp, #-16]!
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| 152 | stp x3, x2, [sp, #-16]!
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| 153 | stp x5, x4, [sp, #-16]!
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| 154 | stp x7, x6, [sp, #-16]!
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| 155 | stp x9, x8, [sp, #-16]!
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| 156 | stp x11, x10, [sp, #-16]!
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| 157 | stp x13, x12, [sp, #-16]!
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| 158 | stp x15, x14, [sp, #-16]!
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| 159 | stp x17, x16, [sp, #-16]!
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| 160 | stp x19, x18, [sp, #-16]!
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| 161 | stp x21, x20, [sp, #-16]!
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| 162 | stp x23, x22, [sp, #-16]!
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| 163 | stp x25, x24, [sp, #-16]!
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| 164 | stp x27, x26, [sp, #-16]!
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| 165 | stp x29, x28, [sp, #-16]!
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| 166 |
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| 167 | /*
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| 168 | * spsr_el1, x30ããã¢ã§ä¿å
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| 169 | */
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| 170 | mrs x21, spsr_el1
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| 171 | stp x21, x30, [sp, #-16]!
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| 172 |
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| 173 | /*
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| 174 | * esr_el1, elr_el1 ããã¢ã§ä¿å
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| 175 | */
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| 176 | mrs x21, esr_el1
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| 177 | mrs x22, elr_el1
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| 178 | stp x21, x22, [sp, #-16]!
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| 179 |
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| 180 | /*
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| 181 | * SPã®èª¿æ´(16ãããã¢ã©ã¤ã¡ã³ãã«ãã)
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| 182 | */
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| 183 | mov x1, #8
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| 184 | mov x2, sp
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| 185 | and x1, x2, x1 // 調æ´éã®è¨ç®(0 or 8)
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| 186 | sub sp, sp, x1 // SPã®èª¿æ´
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| 187 | stp xzr, x1, [sp, #-16]! // 調æ´éãä¿å
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| 188 |
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| 189 | /*
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| 190 | * 追å ã®æ ¼ç´é åã確ä¿ããããï¼SPãæ¸ç®ãã¦ãã
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| 191 | */
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| 192 | sub sp, sp, #16
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| 193 | .endm
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| 194 |
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| 195 | /*
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| 196 | * ã³ã³ããã¹ã復帰å¦ç
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| 197 | */
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| 198 | .macro __restore_context
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| 199 | /*
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| 200 | * ã¹ã¿ãã¯ã«ä¿åããä¸é¨ãã¼ã¿ã®ç ´æ£(ã¢ã©ã¤ã¡ã³ã調æ´åãèæ
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| 201 | ®)
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| 202 | */
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| 203 | mov x1, #40
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| 204 | ldr x2, [sp, #24]
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| 205 | add x1, x1, x2
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| 206 | add sp, sp, x1
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| 207 | /*
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| 208 | * ELR/SPSR ã®å¾©å
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| 209 |
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| 210 | */
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| 211 | ldp x21, x22, [sp], #16
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| 212 | msr elr_el1, x21
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| 213 | msr spsr_el1, x22
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| 214 | /*
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| 215 | * x0 - x30 ã®å¾©å
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| 216 |
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| 217 | */
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| 218 | ldr x30, [sp], #8
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| 219 | ldp x29, x28, [sp], #16
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| 220 | ldp x27, x26, [sp], #16
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| 221 | ldp x25, x24, [sp], #16
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| 222 | ldp x23, x22, [sp], #16
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| 223 | ldp x21, x20, [sp], #16
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| 224 | ldp x19, x18, [sp], #16
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| 225 | ldp x17, x16, [sp], #16
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| 226 | ldp x15, x14, [sp], #16
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| 227 | ldp x13, x12, [sp], #16
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| 228 | ldp x11, x10, [sp], #16
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| 229 | ldp x9, x8, [sp], #16
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| 230 | ldp x7, x6, [sp], #16
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| 231 | ldp x5, x4, [sp], #16
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| 232 | ldp x3, x2, [sp], #16
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| 233 | ldp x1, x0, [sp], #16
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| 234 | .endm
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| 235 |
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| 236 | /*
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| 237 | * å²è¾¼ã¿/ä¾å¤ã®åºå£å¦ç
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| 238 | * åæï¼CPUããã¯ç¶æ
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| 239 | , ãã¹ãã«ã¦ã³ã¿ãã¯ãªã¡ã³ãæ¸ã¿
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| 240 | */
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| 241 | .text
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| 242 | .align 2
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| 243 | .global ret_int
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| 244 | ret_int:
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| 245 | // æ»ãå
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| 246 | ã®ã³ã³ããã¹ãã確èªãï¼å¤æ®µå²è¾¼ã¿ãªããªã¿ã¼ã³
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| 247 | ldr x1, =_kernel_intnest
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| 248 | ldrb w3, [x1]
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| 249 | cbnz w3, int_return
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| 250 |
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| 251 | ret_int_2: // å段ã®å²è¾¼ã¿ã®å ´å
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| 252 | // reqflg ã false ãªãå¼ã³åºãå
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| 253 | ã¸æ»ã
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| 254 | ldr x0, =reqflg
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| 255 | ldr w1, [x0]
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| 256 | cbz w1, int_return
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| 257 |
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| 258 | ret_int_3: // reqflg ã true ã®å ´å
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| 259 | mov w1, #0 // reqflg = false
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| 260 | str w1, [x0]
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| 261 |
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| 262 | // ãã£ã¹ãããç¦æ¢ãªãå¼ã³åºãå
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| 263 | ã¸æ»ã
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| 264 | ldr x0, =disdsp
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| 265 | ldr w1, [x0]
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| 266 | cbnz w1, int_return
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| 267 |
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| 268 | /*
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| 269 | * é
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| 270 | 延ãã£ã¹ããã
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| 271 | * search_schedtsk ã®è¿å¤(x0)ãå¼æ°ã¨ã㦠run_task ãå¼ã³åºã
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| 272 | */
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| 273 | bl search_schedtsk
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| 274 | bl run_task
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| 275 |
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| 276 | /*
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| 277 | * å¼ã³åºãå
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| 278 | ã¸ãªã¿ã¼ã³
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| 279 | */
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| 280 | int_return:
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| 281 | __restore_context // ã¬ã¸ã¹ã¿å¾©å¸°
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| 282 | eret
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| 283 |
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| 284 | /*
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| 285 | * å²è¾¼ã¿ãã¯ã¿
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| 286 | * æåã«å²è¾¼ã¿çºçåã®ã¹ã¿ãã¯ã«æ»ãã¦ããã¬ã¸ã¹ã¿ãä¿åãã
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| 287 | * ãã¼ãã¦ã§ã¢ã«ãã£ã¦PSTATE.{I,F} ãã»ããæ¸ã§ãããã¨ãåæã¨ãã
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| 288 | */
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| 289 | .text
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| 290 | .global vectors
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| 291 | .align 11
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| 292 | vectors:
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| 293 | /*
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| 294 | * From EL1t
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| 295 | */
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| 296 |
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| 297 | // Sync EL1
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| 298 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 299 | __save_context
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| 300 | mov x22, #0 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 301 | b gic_exc_entry
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| 302 |
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| 303 | // IRQ EL1
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| 304 | .align 7
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| 305 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 306 | __save_context
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| 307 | b gic_int_entry
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| 308 |
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| 309 | // FIQ EL1
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| 310 | .align 7
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| 311 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã¸æ»ã
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| 312 | __save_context
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| 313 | b gic_int_entry
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| 314 |
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| 315 | // SError EL1
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| 316 | .align 7
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| 317 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã¸æ»ã
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| 318 | __save_context
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| 319 | mov x22, #1 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 320 | b gic_exc_entry
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| 321 |
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| 322 | /*
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| 323 | * From EL1h
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| 324 | */
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| 325 |
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| 326 | // Sync EL1
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| 327 | .align 7
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| 328 | __save_context
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| 329 | mov x22, #2 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 330 | b gic_exc_entry
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| 331 |
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| 332 | // IRQ EL1
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| 333 | .align 7
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| 334 | __save_context
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| 335 | b gic_int_entry
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| 336 |
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| 337 | // FIQ EL1
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| 338 | .align 7
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| 339 | __save_context
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| 340 | b gic_int_entry
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| 341 |
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| 342 | // Error EL1
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| 343 | .align 7
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| 344 | __save_context
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| 345 | mov x22, #3 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 346 | b gic_exc_entry
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| 347 |
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| 348 | /*
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| 349 | * From EL0t
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| 350 | */
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| 351 |
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| 352 | // Sync EL0
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| 353 | .align 7
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| 354 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 355 | __save_context
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| 356 | mov x22, #4 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 357 | b gic_exc_entry
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| 358 |
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| 359 | // IRQ EL0
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| 360 | .align 7
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| 361 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 362 | __save_context
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| 363 | b gic_int_entry
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| 364 |
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| 365 | // FIQ EL0
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| 366 | .align 7
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| 367 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 368 | __save_context
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| 369 | b gic_int_entry
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| 370 |
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| 371 | // Error EL0
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| 372 | .align 7
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| 373 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 374 | __save_context
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| 375 | mov x22, #5 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 376 | b gic_exc_entry
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| 377 |
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| 378 | /*
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| 379 | * From EL0 using AArch32
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| 380 | */
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| 381 |
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| 382 | // AArch32 sync
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| 383 | .align 7
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| 384 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 385 | __save_context
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| 386 | mov x22, #6 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 387 | b gic_exc_entry
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| 388 |
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| 389 | // AArch32 IRQ
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| 390 | .align 7
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| 391 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 392 | __save_context
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| 393 | b gic_int_entry
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| 394 |
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| 395 | // AArch32 FIQ
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| 396 | .align 7
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| 397 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 398 | __save_context
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| 399 | b gic_int_entry
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| 400 |
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| 401 | // AArch32 Error
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| 402 | .align 7
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| 403 | msr spsel, #0 // ä¾å¤çºçåã®ã¹ã¿ãã¯(SP_EL0)ã«æ»ã
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| 404 | __save_context
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| 405 | mov x22, #7 // ä¾å¤çªå·ãx22ã«ã»ãã
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| 406 | b gic_exc_entry
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