145 lines
3.8 KiB
C++
145 lines
3.8 KiB
C++
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/hl/amd64/irq.cc
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* DESCRIPTION: Interrupts support for AMD64 architecture
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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* Aiken Harris <harraiken91@gmail.com>
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*/
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#include <xtos.hh>
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/**
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* Returns the registered interrupt handler for the specified IDT vector.
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*
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* @param Vector
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* Supplies the interrupt vector number.
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*
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* @return This routine returns the pointer to the IDT interrupt handler routine.
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*
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* @since XT 1.0
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*/
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XTAPI
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PVOID
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HL::Irq::QueryInterruptHandler(IN ULONG Vector)
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{
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PKPROCESSOR_BLOCK ProcessorBlock;
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PKIDTENTRY IdtEntry;
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/* Get current processor block and IDT entry */
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ProcessorBlock = KE::Processor::GetCurrentProcessorBlock();
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IdtEntry = &ProcessorBlock->IdtBase[Vector];
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/* Return address of the interrupt handler */
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return (PVOID)((ULONGLONG)IdtEntry->OffsetHigh << 32 |
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(ULONGLONG)IdtEntry->OffsetMiddle << 16 |
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(ULONGLONG)IdtEntry->OffsetLow);
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}
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/**
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* Returns the registered interrupt handler for the specified vector.
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*
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* @param Vector
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* Supplies the interrupt vector number.
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*
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* @return This routine returns the pointer to the interrupt handler routine.
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*
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* @since XT 1.0
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*/
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XTAPI
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PVOID
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HL::Irq::QuerySystemInterruptHandler(IN ULONG Vector)
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{
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PKPROCESSOR_BLOCK ProcessorBlock;
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/* Get current processor block */
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ProcessorBlock = KE::Processor::GetCurrentProcessorBlock();
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return (PVOID)ProcessorBlock->InterruptDispatchTable[Vector];
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}
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/**
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* Registers new interrupt handler for the existing IDT entry.
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*
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* @param HalVector
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* Supplies the interrupt vector number.
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*
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* @param Handler
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* Supplies the pointer to the interrupt handler routine.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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HL::Irq::RegisterInterruptHandler(IN ULONG Vector,
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IN PVOID Handler)
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{
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PKPROCESSOR_BLOCK ProcessorBlock;
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/* Get current processor block */
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ProcessorBlock = KE::Processor::GetCurrentProcessorBlock();
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/* Update interrupt handler */
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AR::ProcSup::SetIdtGate(ProcessorBlock->IdtBase,
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Vector,
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Handler,
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KGDT_R0_CODE,
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0,
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KIDT_ACCESS_RING0,
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AMD64_INTERRUPT_GATE);
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}
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/**
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* Registers the interrupt handler for the specified vector.
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*
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* @param HalVector
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* Supplies the interrupt vector number.
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*
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* @param Handler
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* Supplies the pointer to the interrupt handler routine.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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HL::Irq::RegisterSystemInterruptHandler(IN ULONG Vector,
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IN PINTERRUPT_HANDLER Handler)
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{
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PKPROCESSOR_BLOCK ProcessorBlock;
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/* Get current processor block */
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ProcessorBlock = KE::Processor::GetCurrentProcessorBlock();
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/* Update interrupt handler in the processor's interrupt dispatch table */
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ProcessorBlock->InterruptDispatchTable[Vector] = Handler;
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}
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/**
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* Handles unexpected or unmapped system interrupts.
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*
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* @param TrapFrame
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* Supplies a kernel trap frame pushed by common interrupt handler.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTCDECL
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VOID
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HL::Irq::HandleUnexpectedInterrupt(IN PKTRAP_FRAME TrapFrame)
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{
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UNIMPLEMENTED;
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/* Disable interrupts */
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AR::CpuFunc::ClearInterruptFlag();
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/* Print debug message and raise kernel panic */
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DebugPrint(L"ERROR: Caught unexpected interrupt (0x%.2llX)!\n", TrapFrame->Vector);
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KE::Crash::Panic(0x47, TrapFrame->Vector, 0, 0, 0);
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}
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