[363] | 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 | * Copyright (C) 2001-2004 by Industrial Technology Institute,
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| 9 | * Miyagi Prefectural Government, JAPAN
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| 10 | *
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| 11 | * ä¸è¨èä½æ¨©è
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| 12 | ã¯ï¼ä»¥ä¸ã® (1)ã(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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| 13 | * ã«ãã£ã¦å
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| 14 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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| 15 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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| 16 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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| 17 | å¸ï¼ä»¥ä¸ï¼
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| 18 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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| 19 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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| 20 | * 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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| 21 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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| 22 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 23 | * ç¨ã§ããå½¢ã§åé
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| 24 | å¸ããå ´åã«ã¯ï¼åé
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| 25 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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| 26 | * è
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| 27 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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| 28 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 29 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 30 | * ç¨ã§ããªãå½¢ã§åé
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| 31 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
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| 32 | * ã¨ï¼
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| 33 | * (a) åé
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| 34 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 35 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 36 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 37 | * (b) åé
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| 38 | å¸ã®å½¢æ
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| 39 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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| 40 | * å ±åãããã¨ï¼
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| 41 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 42 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 43 | ããã³TOPPERSããã¸ã§ã¯ããå
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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¦ï¼ãã®é©ç¨å¯è½æ§ã
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| 49 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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| 50 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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| 51 | *
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| 52 | * @(#) $Id: start.S,v 1.12 2004/09/22 08:47:52 honda Exp $
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| 53 | */
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| 54 |
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| 55 | /*
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| 56 | * ã«ã¼ãã«ç¨ã®ã¹ã¿ã¼ãã¢ããã¢ã¸ã¥ã¼ã«ï¼SH1ç¨ï¼
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| 57 | */
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| 58 |
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| 59 | #define _MACRO_ONLY
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| 60 | #include <t_config.h>
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| 61 |
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| 62 |
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| 63 |
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| 64 | /*
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| 65 | *ããä¾å¤ãã¯ã¿ã®å®ç¾©ï¼SH1ç¨ï¼
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| 66 | *ãããããã§ã¯ãªã»ããæã«å¿
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| 67 | è¦ãªæä½éã®ãã¯ã¿ããç¨æããªã
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| 68 | *ãããcpu_initialize()ã§ä¾å¤ãã¯ã¿ã®ç§»åï¼VBRã®æ¸ãæãï¼ãè¡ã
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| 69 | */
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| 70 | #ifdef KERNEL_HAS_A_VECTOR_TABLE
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| 71 |
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| 72 | /*
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| 73 | * 以ä¸ã®ä¾å¤è¦å ã§ããã©ã«ãã¨ã¯ç°ãªãä¾å¤ãã¯ã¿ãå®ç¾©
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| 74 | * ããå ´åã¯ãsys_config.hã§è©²å½ãããã¯ããå®ç¾©ããã
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| 75 | */
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| 76 | .section ".vector","ax"
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| 77 | .align 2
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| 78 | .long TO_ASM(RESET_VECTOR) /* 0:ãã¯ã¼ãªã³ãªã»ãã */
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| 79 | .long INIT_STACK /* SPã®åæå¤ */
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| 80 | .long TO_ASM(RESET_VECTOR) /* 2:ããã¥ã¢ã«ãªã»ãã */
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| 81 | .long INIT_STACK /* SPã®åæå¤ */
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| 82 | .long TO_ASM(GII_VECTOR) /* 4:ä¸è¬ä¸å½å½ä»¤ */
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| 83 | .long TO_ASM(RESERVED_VECTOR) /* 5:ã·ã¹ãã äºç´ */
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| 84 | .long TO_ASM(SII_VECTOR) /* 6:ã¹ãããä¸å½å½ä»¤ */
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| 85 | .long TO_ASM(RESERVED_VECTOR) /* 7:ã·ã¹ãã äºç´ */
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| 86 | .long TO_ASM(RESERVED_VECTOR) /* 8:ã·ã¹ãã äºç´ */
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| 87 | .long TO_ASM(CAE_VECTOR) /* 9:CPUã¢ãã¬ã¹ã¨ã©ã¼ */
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| 88 | .long TO_ASM(DAE_VECTOR) /* 10:DMAã¢ãã¬ã¹ã¨ã©ã¼ */
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| 89 | .long TO_ASM(NMI_VECTOR) /* 11:MNI */
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| 90 | #endif /* KERNEL_HAS_A_VECTOR_TABLE */
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| 91 |
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| 92 | /*
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| 93 | * SH1ç¨ã¹ã¿ã¼ãã¢ããã¢ã¸ã¥ã¼ã«
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| 94 | */
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| 95 | .global _start
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| 96 | .section .text
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| 97 | .align 2
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| 98 | _start:
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| 99 | /*
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| 100 | * SRãåæåãããï¼å²è¾¼ã¿ç¦æ¢ï¼
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| 101 | * IPM=0xe
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| 102 | * stubå®è¡æã®ã¿IPM=0xfã¨ãªãã
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| 103 | */
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| 104 | mov.l _init_sr,r0
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| 105 | ldc r0,sr
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| 106 | /*
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| 107 | * éã¿ã¹ã¯ã³ã³ãã¹ãã®ã¹ã¿ãã¯ãSTACKTOPã«åæåãã
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| 108 | * STACKTOPã¯ãsys_config.hã§å®ç¾©
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| 109 | */
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| 110 | mov.l _stack_k, r15
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| 111 |
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| 112 | /*
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| 113 | * _hardware_init_hook ãå¼ã³åºãã(0ã§ãªãå ´å)
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| 114 | *
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| 115 | * ãã¼ãã¦ã§ã¢ä¾åã«å¿
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| 116 | è¦ãªåæåå¦çãããå ´åã¯ï¼
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| 117 | * hardware_init_hook ã¨ããé¢æ°ãç¨æããã°ããï¼
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| 118 | * å
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| 119 | ·ä½çã«ã¯ROMåã®éãRAMã使ç¨å¯è½ã«ããããã®
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| 120 | * ãã¹ã³ã³ããã¼ã©ã®åæåçãè¡ãã
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| 121 | * sys_support.S å
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| 122 | 㧠hardware_init_hook ãå®ç¾©ãã¦ã
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| 123 | * ãï¼
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| 124 | */
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| 125 | start_0:
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| 126 | /*
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| 127 | * ããã»ããµå
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| 128 | èµRAMãå©ç¨ã§ããå ´åã¯ãã®ã¢ãã¬ã¹ã
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| 129 | * INNER_RAM_ADDRESSãã¯ãã¨ãã¦sys_config.hã¾ãã¯
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| 130 | * ã³ã³ãã¤ã©ã»ãªãã·ã§ã³ã§å®ç¾©ããã
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| 131 | *ãï¼å
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| 132 | èµRAMã®å
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| 133 | é ã¢ãã¬ã¹ã§ã¯ãªããã¹ã¿ãã¯ã®åºã§
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| 134 | *ããããç¹ã«æ³¨æï¼
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| 135 | *
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| 136 | * ãã®å ´åãhardware_init_hook()é¢æ°ãCè¨èªã§
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| 137 | * è¨è¿°ãã¦ããã
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| 138 | * ä¸è¬ã«Cè¨èªã®é¢æ°å¼ã³åºãã¯ã¹ã¿ãã¯ã使ç¨ããã®ã§
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| 139 | * ãã¹ã³ã³ããã¼ã©ã®åæååã«ã§ããªãã
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| 140 | */
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| 141 | #ifdef INNER_RAM_ADDRESS
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| 142 | mov.l _inner_ram_address_k, r15
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| 143 | #endif /* INNER_RAM_ADDRESS */
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| 144 | mov.l _hardware_init_k, r0
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| 145 | tst r0,r0
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| 146 | bt start_1
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| 147 | jsr @r0
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| 148 | nop
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| 149 |
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| 150 |
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| 151 | /*
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| 152 | * bssã»ã¯ã·ã§ã³ãã¯ãªã¢
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| 153 | */
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| 154 | start_1:
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| 155 | /*
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| 156 | * ã¹ã¿ãã¯ãã¤ã³ã¿ãå¤é¨RAMã«åè¨å®ãããï¼ä¸è¨åç
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| 157 | §ï¼
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| 158 | */
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| 159 | #ifdef INNER_RAM_ADDRESS
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| 160 | mov.l _stack_k, r15
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| 161 | #endif /* INNER_RAM_ADDRESS */
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| 162 |
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| 163 | mov.l _bss_start_k,r0
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| 164 | mov.l _end_k,r1
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| 165 | cmp/eq r0,r1
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| 166 | bt start_3
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| 167 | mov #0,r2
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| 168 | start_2:
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| 169 | /*
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| 170 | * r0ã®ã¤ã³ã¯ãªã¡ã³ããåé·ã«è¦ããã
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| 171 | * mov.l r4,@r0+å½ä»¤ã¯ãªã
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| 172 | * ãã£ã¹ãã£ãã¼ã·ã§ã³ã®ã¢ãã¬ã¹ã¯ãã£ã¯ãªã¡ã³ãã®ã¿
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| 173 | */
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| 174 | mov.l r2,@r0
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| 175 | add #4,r0
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| 176 | cmp/hi r0,r1
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| 177 | bt start_2
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| 178 |
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| 179 | /*
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| 180 | * dataã»ã¯ã·ã§ã³ãåæåããï¼ROMå対å¿ï¼ï¼
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| 181 | *
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| 182 | * __idata_start ãã __idata_end ã¾ã§ãï¼__data_start 以éã«
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| 183 | * ã³ãã¼ããï¼
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| 184 | *
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| 185 | *ããããã°ç°å¢ã«ãã£ã¦ã¯dataã»ã¯ã·ã§ã³ã®èªèã«ä¸å
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| 186 | ·åãããã
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| 187 | *ã__idata_startçªå°ã«ãã¦ã³ãã¼ããã¹ããã¼ã¿ã__data_start
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| 188 | *ãçªå°ã«ãã¦ã³ãã¼ããã¦ãã¾ããã®ãããããã®å ´åã¯
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| 189 | *ãOMIT_DATA_SECTION_COPYãã¯ããå®ç¾©ãã¦ãããã¨ã§ãã®ã³ãã¼
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| 190 | *ãä½æ¥ãçç¥ããã
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| 191 | */
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| 192 | start_3:
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| 193 | #ifndef OMIT_DATA_SECTION_COPY /* dataã»ã¯ã·ã§ã³ã®ã³ãã¼ãè¡ãå ´å */
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| 194 | mov.l __idata_start_k,r1
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| 195 | mov.l __idata_end_k,r2
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| 196 | cmp/eq r1,r2
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| 197 | bt start_5
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| 198 | mov.l __data_start_k,r0
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| 199 | start_4:
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| 200 | mov.l @r1+,r4
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| 201 | mov.l r4,@r0
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| 202 | cmp/hi r1,r2
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| 203 | add #4,r0
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| 204 | bt start_4
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| 205 | #endif /* OMIT_DATA_SECTION_COPY */
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| 206 |
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| 207 | /*
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| 208 | * software_init_hook ãå¼ã³åºãï¼0 ã§ãªãå ´åï¼ï¼
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| 209 | *
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| 210 | * ã½ããã¦ã§ã¢ç°å¢ï¼ç¹ã«ã©ã¤ãã©ãªï¼ã«ä¾åãã¦å¿
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| 211 | è¦ãªåæåå¦
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| 212 | * çãããå ´åã¯ï¼software_init_hook ã¨ããé¢æ°ãç¨æããã°
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| 213 | * ããï¼
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| 214 | */
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| 215 | start_5:
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| 216 | mov.l _software_init_hook_k, r0
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| 217 | tst r0,r0
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| 218 | bt start_6
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| 219 | jsr @r0
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| 220 | nop
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| 221 |
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| 222 |
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| 223 | start_6:
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| 224 | /*
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| 225 | * ã«ã¼ãã«ãèµ·åãã
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| 226 | */
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| 227 | ! call the mainline
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| 228 | mov.l _kernel_start_k,r0
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| 229 | jsr @r0
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| 230 | nop
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| 231 |
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| 232 |
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| 233 | .align 2
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| 234 | _intnest_k:
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| 235 | .long _intnest
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| 236 | _init_sr:
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| 237 | .long MAX_IPM << 4
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| 238 | _stack_k:
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| 239 | .long STACKTOP
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| 240 |
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| 241 | #ifdef INNER_RAM_ADDRESS
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| 242 | _inner_ram_address_k:
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| 243 | .long INNER_RAM_ADDRESS
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| 244 | #endif /* INNER_RAM_ADDRESS */
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| 245 |
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| 246 | _bss_start_k:
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| 247 | .long __bss_start
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| 248 |
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| 249 | #ifdef FILL_STACK_WITH_0 /* ãããã¬ã§ã¹ã¿ãã¯é åã観å¯ãæã */
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| 250 | /* ãããããéã¿ã¹ã¯ã³ã³ããã¹ãã® */
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| 251 | /* ã¹ã¿ãã¯é åãåæåãã */
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| 252 | _end_k:
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| 253 | .long STACKTOP
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| 254 | #else /* ã¹ã¿ãã¯é åãåæåããªãå ´å */
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| 255 | _end_k: /* ãbssã»ã¯ã·ã§ã³ã ãåæåãã */
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| 256 | .long _end
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| 257 | #endif /* FILL_STACK_WITH_0 */
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| 258 |
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| 259 |
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| 260 | #ifndef OMIT_DATA_SECTION_COPY /* dataã»ã¯ã·ã§ã³ã®ã³ãã¼ãè¡ãå ´å */
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| 261 | __idata_start_k:
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| 262 | .long __idata_start
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| 263 | __idata_end_k:
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| 264 | .long __idata_end
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| 265 | __data_start_k:
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| 266 | .long __data_start
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| 267 | #endif /* OMIT_DATA_SECTION_COPY */
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| 268 |
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| 269 | _kernel_start_k:
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| 270 | .long _kernel_start
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| 271 | _hardware_init_k:
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| 272 | .long _hardware_init_hook
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| 273 | _software_init_hook_k:
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| 274 | .long _software_init_hook
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| 275 |
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