74 lines
1.2 KiB
C++
74 lines
1.2 KiB
C++
/*
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* \brief Interrupt Descriptor Table (IDT)
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* \author Adrian-Ken Rueegsegger
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* \author Reto Buerki
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* \date 2015-02-13
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*/
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/*
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* Copyright (C) 2015 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _IDT_H_
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#define _IDT_H_
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#include <base/stdint.h>
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namespace Genode
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{
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/**
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* Interrupt Descriptor Table (IDT)
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* See Intel SDM Vol. 3A, section 6.10
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*/
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class Idt;
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}
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class Genode::Idt
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{
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private:
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enum {
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SIZE_IDT = 256,
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SYSCALL_VEC = 0x80,
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};
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/**
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* 64-Bit Mode IDT gate, see Intel SDM Vol. 3A, section 6.14.1.
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*/
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struct gate
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{
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uint16_t offset_15_00;
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uint16_t segment_sel;
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uint16_t flags;
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uint16_t offset_31_16;
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uint32_t offset_63_32;
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uint32_t reserved;
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};
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/**
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* IDT table
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*/
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__attribute__((aligned(8))) gate _table[SIZE_IDT];
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public:
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/**
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* Setup IDT.
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*
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* \param virt_base virtual base address of mode transition pages
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*/
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void setup(addr_t const virt_base);
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/**
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* Load IDT into IDTR.
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*
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* \param virt_base virtual base address of mode transition pages
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*/
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void load(addr_t const virt_base);
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};
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#endif /* _IDT_H_ */
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