[26] | 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 Dep. of Computer Science and Engineering
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| 9 | * Tomakomai National College of Technology, JAPAN
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| 10 | * Copyright (C) 2001-2004 by Industrial Technology Institute,
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| 11 | * Miyagi Prefectural Government, JAPAN
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| 12 | *
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| 13 | * ä¸è¨èä½æ¨©è
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| 14 | ã¯ï¼ä»¥ä¸ã® (1)ã(4) ã®æ¡ä»¶ãï¼Free Software Foundation
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| 15 | * ã«ãã£ã¦å
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| 16 | ¬è¡¨ããã¦ãã GNU General Public License ã® Version 2 ã«è¨
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| 17 | * è¿°ããã¦ããæ¡ä»¶ãæºããå ´åã«éãï¼æ¬ã½ããã¦ã§ã¢ï¼æ¬ã½ããã¦ã§ã¢
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| 18 | * ãæ¹å¤ãããã®ãå«ãï¼ä»¥ä¸åãï¼ã使ç¨ã»è¤è£½ã»æ¹å¤ã»åé
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| 19 | å¸ï¼ä»¥ä¸ï¼
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| 20 | * å©ç¨ã¨å¼ã¶ï¼ãããã¨ãç¡åã§è¨±è«¾ããï¼
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| 21 | * (1) æ¬ã½ããã¦ã§ã¢ãã½ã¼ã¹ã³ã¼ãã®å½¢ã§å©ç¨ããå ´åã«ã¯ï¼ä¸è¨ã®èä½
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| 22 | * 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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| 23 | * ã¹ã³ã¼ãä¸ã«å«ã¾ãã¦ãããã¨ï¼
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| 24 | * (2) æ¬ã½ããã¦ã§ã¢ãï¼ã©ã¤ãã©ãªå½¢å¼ãªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 25 | * ç¨ã§ããå½¢ã§åé
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| 26 | å¸ããå ´åã«ã¯ï¼åé
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| 27 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨
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| 28 | * è
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| 29 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®èä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨
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| 30 | * ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 31 | * (3) æ¬ã½ããã¦ã§ã¢ãï¼æ©å¨ã«çµã¿è¾¼ããªã©ï¼ä»ã®ã½ããã¦ã§ã¢éçºã«ä½¿
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| 32 | * ç¨ã§ããªãå½¢ã§åé
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| 33 | å¸ããå ´åã«ã¯ï¼æ¬¡ã®ããããã®æ¡ä»¶ãæºããã
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| 34 | * ã¨ï¼
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| 35 | * (a) åé
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| 36 | å¸ã«ä¼´ãããã¥ã¡ã³ãï¼å©ç¨è
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| 37 | ããã¥ã¢ã«ãªã©ï¼ã«ï¼ä¸è¨ã®è
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| 38 | * ä½æ¨©è¡¨ç¤ºï¼ãã®å©ç¨æ¡ä»¶ããã³ä¸è¨ã®ç¡ä¿è¨¼è¦å®ãæ²è¼ãããã¨ï¼
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| 39 | * (b) åé
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| 40 | å¸ã®å½¢æ
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| 41 | ãï¼å¥ã«å®ããæ¹æ³ã«ãã£ã¦ï¼TOPPERSããã¸ã§ã¯ãã«
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| 42 | * å ±åãããã¨ï¼
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| 43 | * (4) æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´æ¥çã¾ãã¯éæ¥çã«çãããããªãæ
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| 44 | * 害ãããï¼ä¸è¨èä½æ¨©è
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| 45 | ããã³TOPPERSããã¸ã§ã¯ããå
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| 46 | 責ãããã¨ï¼
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| 47 | *
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| 48 | * æ¬ã½ããã¦ã§ã¢ã¯ï¼ç¡ä¿è¨¼ã§æä¾ããã¦ãããã®ã§ããï¼ä¸è¨èä½æ¨©è
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| 49 | ã
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| 50 | * ãã³TOPPERSããã¸ã§ã¯ãã¯ï¼æ¬ã½ããã¦ã§ã¢ã«é¢ãã¦ï¼ãã®é©ç¨å¯è½æ§ã
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| 51 | * å«ãã¦ï¼ãããªãä¿è¨¼ãè¡ããªãï¼ã¾ãï¼æ¬ã½ããã¦ã§ã¢ã®å©ç¨ã«ããç´
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| 52 | * æ¥çã¾ãã¯éæ¥çã«çãããããªãæ害ã«é¢ãã¦ãï¼ãã®è²¬ä»»ãè² ããªãï¼
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| 53 | */
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| 54 |
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| 55 | #define _MACRO_ONLY
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| 56 |
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| 57 | #include <t_config.h> /* CCR_I, MAX_IPM */
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| 58 |
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| 59 | /*
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| 60 | * H8Sç¨ã¹ã¿ã¼ãã¢ããã¢ã¸ã¥ã¼ã«
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| 61 | * ã«ã¼ãã«ã¯ã¢ããªã±ã¼ã·ã§ã³ã¨ãªã³ã¯ãã¦ä½¿ç¨ãã
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| 62 | * ã ããªã®ã§JSPã«ã¼ãã«ã®ã¿ä½¿ç¨ããã
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| 63 | */
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| 64 | .h8300s
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| 65 |
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| 66 | .text
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| 67 | .align 2
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| 68 |
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| 69 | .global start
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| 70 | .global bss_clear /* hardware_init_hook ããã®æ»ãã¢ãã¬ã¹ */
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| 71 |
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| 72 | start:
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| 73 |
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| 74 | /*
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| 75 | * ã¿ã¹ã¯ç¬ç«ã®ã¹ã¿ãã¯ãSTACKTOPã«åæåãã
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| 76 | * ï¼STACKTOPã¯ãsys_config.hã§å®ç¾©ï¼
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| 77 | * ã»ãã¼ãã¦ã§ã¢ããã¥ã¢ã« ã4.2.4 ãªã»ããç´å¾ã®å²è¾¼ã¿ã(P90)ãã
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| 78 | * ããã°ã©ã ã®å
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| 79 | é å½ä»¤ã¯ SP ã®åæåå½ä»¤ã§ãªããã°ãªããªãã
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| 80 | */
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| 81 | mov.l #STACKTOP, sp
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| 82 |
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| 83 | /*
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| 84 | * CCR ã®åæå
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| 85 | * ã»å²è¾¼ã¿å¶å¾¡ã¢ã¼ã0 ã«ãããå²è¾¼ã¿ç¦æ¢ (I = 1 ; CCR)
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| 86 | * ( _hardware_init_hook å
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| 87 | ã§å²è¾¼ã¿å¶å¾¡ã¢ã¼ããå¤æ´ããã¾ã§ã¯ã
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| 88 | * å²è¾¼ã¿å¶å¾¡ã¢ã¼ãã¯0ã§ããã)
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| 89 | */
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| 90 | ldc.b #CCR_I, ccr
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| 91 |
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| 92 | /*
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| 93 | * EXR ã®åæå
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| 94 | * ã»å²è¾¼ã¿å¶å¾¡ã¢ã¼ã2 ã«ãããå²è¾¼ã¿ç¦æ¢ (I2, I1, I0 = 1 ; CCR)
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| 95 | */
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| 96 | ldc.b #MAX_IPM, exr
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| 97 |
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| 98 | /*
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| 99 | * hardware_init_hook ãå¼ã³åºãã(0ã§ãªãå ´å)
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| 100 | * ã»ã¿ã¼ã²ãããã¼ãã¦ã§ã¢ã«ä¾åããåæåå¦çãããå ´åã¯ï¼
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| 101 | * hardware_init_hook ã¨ããé¢æ°ãç¨æããï¼
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| 102 | * ä¾ï¼ROMåã®éãRAMã使ç¨å¯è½ã«ããããã®ãã¹ã³ã³ããã¼ã©ã®åæå
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| 103 | * ä»åã¯ãsys_support.S å
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| 104 | 㧠hardware_init_hook ãå®ç¾©ãã¦ããï¼
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| 105 | */
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| 106 | hardware_init:
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| 107 | mov.l @_hardware_init_hook_k, er0
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| 108 | or.l er0, er0
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| 109 | beq bss_clear /* er0 = 0 ãªã bss_clear 㸠*/
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| 110 | jmp @er0
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| 111 |
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| 112 | /*
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| 113 | * bssã»ã¯ã·ã§ã³ãã¯ãªã¢
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| 114 | */
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| 115 | bss_clear:
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| 116 | mov.l #__bss_start, er0
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| 117 | mov.l #_end, er1
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| 118 | sub.l er2, er2
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| 119 | loop_bss_clear:
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| 120 | mov.l er2, @er0
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| 121 | add.l #4, er0
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| 122 | cmp.l er1, er0
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| 123 | blo loop_bss_clear /* er1 > er0 ã¾ã§ã¸ã£ã³ã */
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| 124 |
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| 125 | /*
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| 126 | * dataã»ã¯ã·ã§ã³ãåæåããï¼ROMå対å¿ï¼
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| 127 | *
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| 128 | * __idata_start ãã __idata_end ã¾ã§ãï¼__data_start 以éã«ã³ãã¼ãã
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| 129 | */
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| 130 | data_sec_copy:
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| 131 | mov.l #__idata_start, er0
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| 132 | mov.l #__idata_end, er1
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| 133 | mov.l #__data_start, er2
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| 134 | loop_data_sec_copy:
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| 135 | mov.l @er0+, er4 /* *er2++ = *er0 ++; */
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| 136 | mov.l er4, @er2
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| 137 | add.l #4, er2
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| 138 | cmp.l er1, er0
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| 139 | blo loop_data_sec_copy /* er1 > er0 ã¾ã§ã¸ã£ã³ã */
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| 140 |
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| 141 | /*
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| 142 | * software_init_hook ãå¼ã³åºãï¼0 ã§ãªãå ´åï¼
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| 143 | *
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| 144 | * ã½ããã¦ã§ã¢ç°å¢ï¼ç¹ã«ã©ã¤ãã©ãªï¼ã«ä¾åãã¦å¿
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| 145 | è¦ãªåæåå¦çããã
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| 146 | * å ´åã¯ï¼software_init_hook ã¨ããé¢æ°ãç¨æããï¼
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| 147 | */
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| 148 | software_init:
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| 149 | mov.l @_software_init_hook_k, er0
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| 150 | or.l er0, er0
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| 151 | beq start_kernel
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| 152 | jsr @er0
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| 153 |
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| 154 | /*
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| 155 | * ã«ã¼ãã«ãèµ·åãã
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| 156 | */
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| 157 | start_kernel:
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| 158 | jmp @_kernel_start
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| 159 |
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| 160 | .align 4
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| 161 | _hardware_init_hook_k:
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| 162 | .long _hardware_init_hook
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| 163 | _software_init_hook_k:
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| 164 | .long _software_init_hook
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