[270] | 1 | /*
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| 2 | * TOPPERS Software
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| 3 | * Toyohashi Open Platform for Embedded Real-Time Systems
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| 4 | *
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| 5 | * Copyright (C) 2000-2003 by Embedded and Real-Time Systems Laboratory
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| 6 | * Toyohashi Univ. of Technology, JAPAN
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| 7 | * Copyright (C) 2005-2016 by Embedded and Real-Time Systems Laboratory
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| 8 | * Graduate School of Information Science, Nagoya Univ., 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)ï½(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 | * $Id: start.S 270 2017-02-09 04:03:47Z coas-nagasima $
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| 55 | */
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| 56 |
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| 57 | /*
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| 58 | * ã«ã¼ãã«ç¨ã®ã¹ã¿ã¼ãã¢ããã¢ã¸ã¥ã¼ã«ï¼ARMç¨ï¼
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| 59 | */
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| 60 |
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| 61 | #define TOPPERS_MACRO_ONLY
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| 62 | #define TOPPERS_ASM_MACRO
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| 63 | #define UINT_C(val) (val) /* uint_tåã®å®æ°ãä½ããã¯ã */
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| 64 | #define ULONG_C(val) (val) /* ulong_tåã®å®æ°ãä½ããã¯ã */
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| 65 | #define CAST(type, val) (val) /* åãã£ã¹ããè¡ããã¯ã */
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| 66 | #include "kernel_impl.h"
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| 67 | #include "core_asm.inc"
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| 68 |
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| 69 | ATEXT
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| 70 | AALIGN(2)
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| 71 | AGLOBAL(start)
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| 72 | ALABEL(start)
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| 73 | /*
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| 74 | * ããã»ããµã¢ã¼ãã®åæå
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| 75 | *
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| 76 | * ã¹ã¼ããã¤ã¶ã¢ã¼ãï¼å
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| 77 | ¨å²è¾¼ã¿ããã¯ç¶æ
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| 78 | ã«åæåããï¼
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| 79 | */
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| 80 | msr cpsr_cxsf, #(CPSR_SVC_MODE AOR CPSR_INTLOCK)
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| 81 |
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| 82 | /*
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| 83 | * ã¹ã¿ãã¯ãã¤ã³ã¿ã¨ãã¬ã¼ã ãã¤ã³ã¿ã®åæå
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| 84 | */
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| 85 | ldr r0, =_kernel_istkpt
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| 86 | ldr sp, [r0] /* ã¹ã¿ãã¯ãã¤ã³ã¿ï¼spï¼*/
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| 87 | mov fp, #0 /* ARMã¢ã¼ãç¨ãã¬ã¼ã ãã¤ã³ã¿ï¼r11ï¼*/
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| 88 | mov r7, #0 /* Thumbã¢ã¼ãç¨ãã¬ã¼ã ãã¤ã³ã¿ï¼r7ï¼*/
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| 89 |
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| 90 | /*
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| 91 | * hardware_init_hookã®å¼åºãï¼0ã§ãªãå ´åï¼
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| 92 | *
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| 93 | * ã¿ã¼ã²ãããã¼ãã¦ã§ã¢ã«ä¾åãã¦å¿
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| 94 | è¦ãªåæåå¦çãããå ´åã¯ï¼
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| 95 | * hardware_init_hookã¨ããé¢æ°ãç¨æããï¼
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| 96 | */
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| 97 | ldr r0, =hardware_init_hook
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| 98 | cmp r0, #0
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| 99 | movne lr, pc
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| 100 | bxne r0
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| 101 |
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| 102 | #ifndef TOPPERS_OMIT_BSS_INIT
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| 103 | /*
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| 104 | * bssã»ã¯ã·ã§ã³ã®ã¯ãªã¢
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| 105 | *
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| 106 | * BSS_STARTããBSS_ENDã¾ã§ãã¼ãã¯ãªã¢ããï¼
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| 107 | */
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| 108 | ldr r0, =BSS_START
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| 109 | ldr r2, =BSS_END
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| 110 | cmp r0, r2
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| 111 | bhs start_3
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| 112 | mov r1, #0
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| 113 | #ifdef TOPPERS_USE_STDLIB
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| 114 | sub r2, r2, r0
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| 115 | bl memset
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| 116 | #else /* TOPPERS_USE_STDLIB */
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| 117 | ALABEL(start_2)
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| 118 | str r1, [r0], #4
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| 119 | cmp r0, r2
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| 120 | blo start_2
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| 121 | #endif /* TOPPERS_USE_STDLIB */
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| 122 | ALABEL(start_3)
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| 123 | #endif /* TOPPERS_OMIT_BSS_INIT */
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| 124 |
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| 125 | #ifndef TOPPERS_OMIT_DATA_INIT
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| 126 | /*
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| 127 | * dataã»ã¯ã·ã§ã³ã®åæåï¼ROMå対å¿ï¼
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| 128 | *
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| 129 | * DATA_STARTããDATA_ENDã¾ã§ã«ï¼IDATA_START以éããã³ãã¼ããï¼
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| 130 | * IDATA_STARTããIDATA_ENDã¾ã§ãï¼DATA_START以éã«ã³ãã¼ããï¼
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| 131 | */
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| 132 | ldr r0, =DATA_START
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| 133 | ldr r2, =DATA_END
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| 134 | cmp r0, r2
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| 135 | bhs start_5
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| 136 | ldr r1, =IDATA_START
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| 137 | #ifdef TOPPERS_USE_STDLIB
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| 138 | sub r2, r2, r0
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| 139 | bl memcpy
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| 140 | #else /* TOPPERS_USE_STDLIB */
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| 141 | ALABEL(start_4)
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| 142 | ldr r3, [r1], #4
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| 143 | str r3, [r0], #4
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| 144 | cmp r0, r2
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| 145 | blo start_4
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| 146 | #endif /* TOPPERS_USE_STDLIB */
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| 147 | ALABEL(start_5)
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| 148 | #endif /* TOPPERS_OMIT_DATA_INIT */
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| 149 |
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| 150 | /*
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| 151 | * software_init_hookã®å¼åºãï¼0ã§ãªãå ´åï¼
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| 152 | *
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| 153 | * ã½ããã¦ã§ã¢ç°å¢ï¼ç¹ã«ã©ã¤ãã©ãªï¼ã«ä¾åãã¦å¿
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| 154 | è¦ãªåæåå¦çã
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| 155 | * ããå ´åã¯ï¼software_init_hookã¨ããé¢æ°ãç¨æããã°ããï¼
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| 156 | */
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| 157 | ldr r0, =software_init_hook
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| 158 | cmp r0, #0
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| 159 | movne lr, pc
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| 160 | bxne r0
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| 161 |
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| 162 | /*
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| 163 | * ã«ã¼ãã«ã®èµ·å
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| 164 | */
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| 165 | b sta_ker
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