[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) 2000-2003 by Embedded and Real-Time Systems Laboratory
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| 7 | * Toyohashi Univ. of Technology, JAPAN
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| 8 | * Copyright (C) 2003 by Advanced Data Controls, Corp
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| 9 | * Copyright (C) 2004 by Embedded and Real-Time Systems Laboratory
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| 10 | * Graduate School of Information Science, Nagoya Univ., JAPAN
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| 11 | * 2009 by Suikan
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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 |
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| 56 | #define _MACRO_ONLY
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| 57 | #include "armv4.h"
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| 58 | #include "jsp_kernel.h"
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| 59 |
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| 60 | /*
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| 61 | * ä½ã¬ãã«ã®ã¿ã¼ã²ããã·ã¹ãã ä¾åã®åæå
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| 62 | *
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| 63 | * ã¹ã¿ã¼ãã¢ããã¢ã¸ã¥ã¼ã«ã®ä¸ã§ï¼ã¡ã¢ãªåæåã®åã«å¼ã³åºãããï¼
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| 64 | */
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| 65 |
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| 66 | #define VICIntEnable 0xFFFFF010
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| 67 | #define VICIntEnClr 0xFFFFF014
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| 68 | #define VICSoftInt 0xFFFFF018
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| 69 | #define VICSoftIntClear 0xFFFFF01C
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| 70 | #define VICIntSelect 0xFFFFF00C
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| 71 | #define VICAddress 0xFFFFFF00
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| 72 |
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| 73 |
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| 74 |
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| 75 | .text
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| 76 | .align 2
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| 77 | .global hardware_init_hook
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| 78 | /* VICã®åæåãããã¥ã¢ã«ã«ã¯ä¸è¦ã§ããããã«æ¸ãã¦ããããå®éã«ã¯å¿
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| 79 | è¦ */
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| 80 | hardware_init_hook:
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| 81 | ldr r0, =0xFFFFFFFF
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| 82 | ldr r1, =VICIntEnClr /* å²ãè¾¼ã¿ã¤ãã¼ãã«ã¬ã¸ã¹ã¿ã®ã¢ãã¬ã¹ */
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| 83 | str r0, [r1] /* å²ãè¾¼ã¿ãå
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| 84 | ¨é¨ãã£ã»ã¼ãã« */
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| 85 | ldr r1, =VICSoftIntClear /* ã½ããã¦ã§ã¢å²ãè¾¼ã¿ã¬ã¸ã¹ã¿ã®ã¢ãã¬ã¹ */
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| 86 | str r0, [r1] /* ã½ããã¦ã§ã¢å²ãè¾¼ã¿ãå
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| 87 | ¨é¨ã¯ãªã¢ */
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| 88 | ldr r0, =0;
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| 89 | ldr r1, =VICIntSelect /* å²ãè¾¼ã¿é¸æã¬ã¸ã¹ã¿ã®ã¢ãã¬ã¹ */
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| 90 | str r0, [r1] /* ãã¹ã¦ã®å²ãè¾¼ã¿ãIRQã«å²ãå½ã¦ã */
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| 91 | ldr r1, =VICAddress /* å²ãè¾¼ã¿ãã³ãã©ã¢ãã¬ã¹ã¬ã¸ã¹ã¿ã®ã¢ãã¬ã¹ */
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| 92 | str r0, [r1] /* ã¬ã¸ã¹ã¿ã®åæåãããããããªãã¨å²ãè¾¼ã¿ã¯ããããªã */
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| 93 |
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| 94 | init_done:
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| 95 | mov pc, lr
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| 96 |
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| 97 |
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| 98 | .text
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| 99 | .align 2
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| 100 | .global software_init_hook
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| 101 | software_init_hook:
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| 102 | mov pc, lr
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| 103 |
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| 104 | .text
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| 105 | .align 2
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| 106 | .global software_term_hook
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| 107 | software_term_hook:
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| 108 | mov pc, lr
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| 109 |
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| 110 |
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| 111 |
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| 112 | /*
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| 113 | *
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| 114 | * å²è¾¼ã¿ã®åºå
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| 115 | ¥ãå£å¦çã
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| 116 | * VICã®IRQAddressãåå¾ãã¦ã¸ã£ã³ããããæå¾ã«æ¸ãè¾¼ããã¨
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| 117 | *
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| 118 | */
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| 119 | .text
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| 120 | .align 4
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| 121 | .global IRQ_Handler
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| 122 | IRQ_Handler:
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| 123 |
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| 124 | /*
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| 125 | * å²è¾¼ã¿ã¢ã¼ã
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| 126 | *
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| 127 | * cpsrãspsr_irqã«å¾©å¸°å
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| 128 | ãr14_irq(lp)ã«å
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| 129 | ¥ãï¼
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| 130 | * spsr_irqã¨r14_irqã¨r13(sp)_irqã r14,r13ã¨ãªãï¼
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| 131 | */
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| 132 |
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| 133 | /*
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| 134 | * ã¿ã¹ã¯ã®åä½æã¢ã¼ã(ã¹ã¼ãã¼ãã¤ã¶ã¼ã¢ã¼ã)ã¸
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| 135 | */
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| 136 | mov sp,#(CPSR_SVC | CPSR_FIQ_BIT | CPSR_IRQ_BIT)
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| 137 | msr cpsr_all, sp
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| 138 | stmfd sp!, {r0-r3,ip,lr,pc} /* pcã¯ããã¼ */
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| 139 |
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| 140 |
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| 141 |
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| 142 | /*
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| 143 | * spsrã¨æ»ãçªå°ãåå¾ããããã«IRQã¢ã¼ãã¸
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| 144 | */
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| 145 | mov r0,#(CPSR_IRQ | CPSR_FIQ_BIT | CPSR_IRQ_BIT)
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| 146 | msr cpsr,r0
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| 147 | sub r0,lr,#4
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| 148 | mrs r1,spsr
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| 149 |
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| 150 | /*
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| 151 | * ã¹ã¼ãã¼ãã¤ã¶ã¼ã¢ã¼ãã«
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| 152 | */
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| 153 | and r2, r1, #CPSR_FIQ_BIT /* FIQãããã®ç¶æ¿ */
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| 154 | orr r2, r2, #(CPSR_SVC|CPSR_IRQ_BIT)
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| 155 | msr cpsr_all, r2
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| 156 | str r0, [sp,#0x18] /* Store pc */
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| 157 | stmfd sp!,{r1} /* spsr */
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| 158 |
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| 159 |
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| 160 | /*
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| 161 | * å¤éå²ãè¾¼ã¿ãå¤å®
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| 162 | */
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| 163 | ldr r2, =interrupt_count
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| 164 | ldr r3, [r2]
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| 165 | add r0,r3,#1
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| 166 | str r0, [r2]
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| 167 | cmp r3, #0x00
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| 168 |
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| 169 | moveq r2,sp /* ãã¹ãå²ãè¾¼ã¿ã§ãªãå ´å */
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| 170 | ldreq sp,=STACKTOP /* ã¹ã¿ãã¯ã®å¤æ´ */
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| 171 | stmeqfd sp!,{r2} /* ã¿ã¹ã¯ã¹ã¿ãã¯ã®ä¿å */
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| 172 |
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| 173 | ldr r0, =VICAddress /* å²è¾¼ã¿çä¼¼ãã¼ãã«ã®èªã¿åºã */
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| 174 | ldr r0, [r0] /* r0<-å²è¾¼ã¿ãã³ãã© */
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| 175 |
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| 176 | /*
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| 177 | * å²ãè¾¼ã¿è¨±å¯
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| 178 | */
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| 179 | mrs r2, cpsr
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| 180 | and r2, r2, #~CPSR_IRQ_BIT /* å²è¾¼ã¿è¨±å¯ */
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| 181 | msr cpsr,r2
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| 182 |
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| 183 | /*
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| 184 | * Call Handler
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| 185 | */
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| 186 | mov lr, pc
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| 187 | mov pc, r0
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| 188 |
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| 189 | /*
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| 190 | * å²ãè¾¼ã¿ç¦æ¢
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| 191 | */
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| 192 | mrs r2, cpsr
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| 193 | and r2, r2, #CPSR_FIQ_BIT /* FIQãããã®ç¶æ¿ */
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| 194 | orr r2, r2, #(CPSR_SVC|CPSR_IRQ_BIT)
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| 195 | msr cpsr,r2
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| 196 |
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| 197 | ldr r0, =VICAddress /* å²è¾¼ã¿çä¼¼ãã¼ãã«ã®èªã¿åºã */
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| 198 | str r0, [r0] /* å²ãè¾¼ã¿ã¢ã¯ãã¬ã㸠*/
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| 199 |
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| 200 | /*
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| 201 | * å²è¾¼ã¿ãã¹ãåæ°(interrupt_count) ãã¯ãªã¡ã³ã
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| 202 | */
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| 203 | ldr r2, =interrupt_count
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| 204 | ldr r1, [r2]
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| 205 | sub r3, r1, #1
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| 206 | str r3, [r2]
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| 207 | cmp r3, #0x00
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| 208 | bne return_to_task_irq
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| 209 |
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| 210 | /*
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| 211 | * ã¿ã¹ã¯ã¹ã¿ãã¯ã®å¾©å¸°
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| 212 | */
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| 213 | ldmfd sp!,{r0}
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| 214 | mov sp, r0
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| 215 |
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| 216 | ldr r1, =reqflg /* Check reqflg */
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| 217 | ldr r0, [r1]
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| 218 | cmp r0, #0
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| 219 | beq return_to_task_irq
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| 220 | mov r0, #0
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| 221 | str r0, [r1] /* Clear reqflg */
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| 222 | b ret_int
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| 223 |
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| 224 | return_to_task_irq:
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| 225 | /*
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| 226 | * 復帰å¦ç
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| 227 | * å²ãè¾¼ã¿è¨±å¯ã¨ãªããã¿ã¹ã¯ã³ã³ããã¹ãä¸ã«ä¿åãã¦ããããï¼
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| 228 | * åé¡ã¯ãªã
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| 229 | */
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| 230 | ldmfd sp!,{r1} /* CPSRã®å¾©å¸°å¦ç */
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| 231 | mrs r2, cpsr /* FIQãç¶æ¿ */
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| 232 | and r2, r2, #CPSR_FIQ_BIT
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| 233 | and r1, r1, #~CPSR_FIQ_BIT
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| 234 | orr r1, r1, r2
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| 235 | msr spsr, r1 /* æ»ãå
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| 236 | ã®cpsrãspsrã«è¨å® */
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| 237 | ldmfd sp!,{r0-r3,ip,lr,pc}^ /* ã¿ã¹ã¯ã«å¾©å¸° ^ä»ããªã®ã§ãcpsr <- spsr */
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| 238 |
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| 239 | /*
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| 240 | * æªå®ç¾©ã®å²è¾¼ã¿ãå
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| 241 | ¥ã£ãã¨ãã«å¼ã³åºã
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| 242 | */
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| 243 | undefined_interrupt:
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| 244 | b undef_interrupt
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| 245 |
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| 246 |
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