forked from BSB-WS23/mpstubs
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
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/*! \file
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* \brief \ref IDT "Interrupt Descriptor Table (IDT)" containing the entry points for interrupt handling.
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*/
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#pragma once
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#include "types.h"
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/*! \brief "Interrupt Descriptor Table (IDT)
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* \ingroup interrupt
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*
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* \see [ISDMv3 6.14 Exception and Interrupt Handling in 64-bit Mode](intel_manual_vol3.pdf#page=200)
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*/
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namespace IDT {
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/*! \brief Gate types
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*
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* \see [ISDMv3 3.5 System Descriptor Types](intel_manual_vol3.pdf#page=99)
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*/
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enum Gate {
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GATE_TASK = 0x5, ///< Task Gate
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GATE_INT = 0x6, ///< Interrupt Gate
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GATE_TRAP = 0x7, ///< Trap Gate
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};
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/*! \brief Segment type
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*
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* \see [ISDMv3 3.5 System Descriptor Types](intel_manual_vol3.pdf#page=99)
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*/
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enum GateSize {
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GATE_SIZE_16 = 0, ///< 16 bit
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GATE_SIZE_32 = 1, ///< 32 / 64 bit
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};
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/*! \brief Descriptor Privilege Level
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*/
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enum DPL {
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DPL_KERNEL = 0, ///< Ring 0 / Kernel mode
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/* DPLs 1 and 2 are unused */
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DPL_USER = 3, ///< Ring 3 / User mode
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};
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/*! \brief Load the IDT's address and size into the IDT-Register via `idtr`.
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*/
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void load();
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/*! \brief Configure entry point for interrupt handling
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*
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* The provided entry function ("handler") is required to, as first step, save the registers.
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*
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* \param vector Interrupt vector number for which the handler is to be set/changed
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* \param handler Low-level entry point for interrupt handling
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* \param type Gate type (Interrupt, Trap, or Task)
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* \param size 16- or 32-bit
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* \param dpl Permissions required for enter this interrupt handler (kernel- or user space)
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* \param present Denotes whether the IDT descriptor is marked as available
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*/
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void handle(uint8_t vector, void * handler, enum Gate type = Gate::GATE_INT,
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enum GateSize size = GateSize::GATE_SIZE_32, enum DPL dpl = DPL::DPL_KERNEL, bool present = true);
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} // namespace IDT
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