T-Kernel Specification (1.B0.02)

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184 CHAPTER 4. T-KERNEL/OS FUNCTIONS 4.8 Interrupt Management Functions Interrupt management functions are for defining and manipulating handlers for external interrupts and CPU exceptions. An interrupt handler runs as a task-independent portion. System calls can be invoked in a taskindependent portion in the same way as in a task portion, but the following restriction applies to system call issuing in a task-independent portion. • A system call that implicitly designates the invoking task, or one that may put the invoking task in WAIT state cannot be issued. Error code E CTX is returned in such cases. During task-independent portion execution, task switching (dispatching) does not occur. If system call processing results in a dispatch request, the dispatch is delayed until processing leaves the taskindependent portion. This is called delayed dispatching. Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
4.8. INTERRUPT MANAGEMENT FUNCTIONS 185 tk def int Define Interrupt Handler [C Language Interface] ER ercd = tk_def_int ( UINT dintno, T_DINT *pk_dint ) ; [Parameters] UINT dintno Interrupt definition number T DINT* pk dint Packet of interrupt handler definition information pk dint detail: ATR intatr Interrupt handler attributes FP inthdr Interrupt handler address (Other implementation-dependent parameters may be added beyond this point.) [Return Parameters] ER ercd Error code [Error Codes] E OK E NOMEM E RSATR E PAR Normal completion Insufficient memory (memory for control block cannot be allocated) Reserved attribute (intatr is invalid or cannot be used) Parameter error (dintno, pk dint, or inthdr is invalid or cannot be used) [Description] Defines an interrupt handler for interrupt definition number dintno, and enables use of the interrupt handler. Here “interrupts” include both external interrupts from a device and CPU exceptions. This system call maps the interrupt definition number indicated in dintno to the interrupt handler address and attributes. The specific significance of dintno is defined separately for each implementation, but generally it means an interrupt vector number. intatr indicates system attributes in its low bits, with the high bits used for implementation-dependent attributes. The system attributes part of intatr is designated in the following format. intatr := (TA_ASM || TA_HLNG) TA ASM TA HLNG The handler is written in assembly language The handler is written in high-level language #define TA_ASM 0x00000000 /* assembly program */ #define TA_HLNG 0x00000001 /* high-level language program */ Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
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T-Kernel Specification T-Kernel 1.B
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Contents 1 T-Kernel Overview 1 1.1
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CONTENTS v tk set flg (Set Event Fl
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CONTENTS vii 5.2.2 Address Space Ch
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CONTENTS ix td cal que (Reference Q
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List of Figures 1.1 Position of T-K
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List of Tables 2.1 State Transition
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System Call Notation In the parts o
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Index of T-Kernel/OS System Calls T
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INDEX OF T-KERNEL/OS SYSTEM CALLS x
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Index of T-Kernel/SM Extended SVC L
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Index of T-Kernel/DS System Calls T
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Chapter 1 T-Kernel Overview 1.1 Pos
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1.2. SCALABILITY 3 • Middleware m
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Chapter 2 Concepts Underlying the T
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2.2. TASK STATES AND SCHEDULING RUL
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2.2. TASK STATES AND SCHEDULING RUL
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2.3. INTERRUPT HANDLING 11 preceden
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2.5. SYSTEM STATES 13 Transient sta
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2.7. MEMORY 15 which the upper and
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Chapter 3 Common T-Kernel Specifica
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3.2. SYSTEM CALLS 19 /* * Common co
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3.2. SYSTEM CALLS 21 Ordinarily a f
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3.3. HIGH-LEVEL LANGUAGE SUPPORT RO
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Chapter 4 T-Kernel/OS Functions Thi
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4.1. TASK MANAGEMENT FUNCTIONS 27 t
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4.2. TASK-DEPENDENT SYNCHRONIZATION
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5.4. INTERRUPT MANAGEMENT FUNCTIONS
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5.5. IO PORT ACCESS SUPPORT FUNCTIO
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5.7. SYSTEM CONFIGURATION INFORMATI
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5.7. SYSTEM CONFIGURATION INFORMATI
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5.8. SUBSYSTEM AND DEVICE DRIVER ST
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260 CHAPTER 6. T-KERNEL/DS FUNCTION
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284 CHAPTER 7. REFERENCE INT tevptn
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286 CHAPTER 7. REFERENCE ER ercd =
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288 CHAPTER 7. REFERENCE INT ct = t
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290 CHAPTER 7. REFERENCE E OACV ERC
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