idt.h

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// Copyright (c) 2014, 임경현 (dlarudgus20)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
//   list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef IDT_H_
#define IDT_H_

#include <stddef.h>
#include <stdint.h>

#include "memory_map.h"

typedef uint8_t IdtType;

typedef struct tagIdt
{
    uint16_t HandlerAddress_0_15;

    uint16_t HandlerSegment;

    uint8_t ReservedZero1;

    union
    {
        struct
        {
            unsigned ReservedZero2:1, ReservedOne1:1, ReservedOne2:1;

            unsigned D:1;

            unsigned ReservedZero3:1;

            unsigned DPL:2, P:1;
        };
        IdtType type;
    };

    uint16_t HandlerAddress_16_31;
} Idt;

static Idt * const g_pIdtTable = (Idt *)IDT_TABLE_ADDRESS;

void ckIdtInit(Idt *pIdt, void (*HandlerAddress)(), uint16_t HandlerSegment, uint8_t DPL);

void ckIdtLoad(uint16_t size, Idt *address);

void ckIdtTableInitialize(void);

#endif /* IDT_H_ */