port.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 PORT_H_
#define PORT_H_

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

enum
{
    EFLAG_2     = 0x00000002,   // eflag에는 이 비트가 활성화되야 하는 것 같다.
    EFLAG_IF    = 0x00000200,
    EFLAG_AC    = 0x00040000,
};

void ckAsmFarJmp(uint32_t eip, uint16_t cs);

static inline uint8_t ckPortInByte(uint16_t port);
static inline void ckPortOutByte(uint16_t port, uint8_t data);

static inline void ckAsmGetTimeStamp(uint32_t *high, uint32_t *low);

static inline uint32_t ckAsmGetEFlag(void);
static inline void ckAsmSetEFlag(uint32_t eflag);

static inline void ckAsmCli(void);
static inline void ckAsmSti(void);
static inline void ckAsmHlt(void);

#define INTERRUPT_LOCK() \
    uint32_t _eflag = ckAsmGetEFlag(); \
    ckAsmCli()

#define INTERRUPT_UNLOCK() \
    ckAsmSetEFlag(_eflag)

#include "port_impl.h"

#include "control_register.h"

#endif /* PORT_H_ */