T-Kernel Specification (1.B0.02)

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280 CHAPTER 6. T-KERNEL/DS FUNCTIONS td hoc int Define Interrupt Handler Hook Routine [C Language Interface] ER ercd = td_hok_int ( TD_HINT *hint ) ; [Parameters] TD HINT hint Hook routine definition information hint detail: FP enter Hook routine before calling handler FP leave Hook routine after calling handler [Return Parameters] ER ercd Error code [Description] Sets hook routines before and after an interrupt handler is called. Hook routine setting cannot be done independently for different exception or interrupt factors. One pair of hook routines is set in common for all exception and interrupt factors. Setting hint to NULL cancels the hook routines. The hook routines are called as task-independent portion (part of the interrupt handler). Accordingly, the hook routines can call only those system calls that can be invoked from a task-independent portion. Note that hook routines can be set only for interrupt handlers defined by tk def int with the TA HLNG attribute. A TA ASM attribute interrupt handler cannot be hooked by a hook routine. Hooking of a TA ASM attribute interrupt handler is possible only by directly manipulating the exception/interrupt vector table. The actual methods are implementation-dependent. void enter( UINT dintno ) void leave( UINT dintno ) dintno Interrupt definition number The parameters passed to enter() and leave() are the same as those passed to the exception/interrupt handler. Depending on the implementation, information other than dintno may also be passed. A hook routine is called as follows from a high-level language support routine. enter(dintno); inthdr(dintno); /* exception/interrupt handler */ leave(dintno); Copyright c○ 2002, 2003 by T-Engine Forum T-Kernel 1.B0.02
6.2. TRACE FUNCTIONS 281 enter() is called in interrupts disabled state, and interrupts must not be enabled. Since leave() assumes the status on return from inthdr(), the interrupts disabled or enabled status is indeterminate. enter() can obtain only the same information as that obtainable by inthdr(). Information that cannot be obtained by inthdr() cannot be obtained by enter(). The information that can be obtained by enter() and inthdr() is guaranteed by the specification to include dintno, but other information is implementation-dependent. Note that since interrupts disabled state and other states may change while leave() is running, leave() does not necessarily obtain the same information as that obtained by enter() or inthdr(). 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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4.1. TASK MANAGEMENT FUNCTIONS 29 #
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4.2. TASK-DEPENDENT SYNCHRONIZATION
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4.3. TASK EXCEPTION HANDLING FUNCTI
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4.4. SYNCHRONIZATION AND COMMUNICAT
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4.6. MEMORY POOL MANAGEMENT FUNCTIO
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4.7. TIME MANAGEMENT FUNCTIONS 163
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4.8. INTERRUPT MANAGEMENT FUNCTIONS
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4.9. SYSTEM MANAGEMENT FUNCTIONS 19
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4.10. SUBSYSTEM MANAGEMENT FUNCTION
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Chapter 5 T-Kernel/SM Details of th
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5.1. SYSTEM MEMORY MANAGEMENT FUNCT
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5.2. ADDRESS SPACE MANAGEMENT FUNCT
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5.2. ADDRESS SPACE MANAGEMENT FUNCT
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5.3. DEVICE MANAGEMENT FUNCTIONS 22
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