IoBase.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef KERNEL_PROCESSOR_IOBASE_H
#define KERNEL_PROCESSOR_IOBASE_H

#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/types.h"

class EXPORTED_PUBLIC IoBase
{
  public:
    virtual ~IoBase();

    virtual size_t size() const = 0;
    virtual uint8_t read8(size_t offset = 0) = 0;
    virtual uint16_t read16(size_t offset = 0) = 0;
    virtual uint32_t read32(size_t offset = 0) = 0;
#if defined(BITS_64)

    virtual uint64_t read64(size_t offset = 0) = 0;
#endif

    inline uint64_t read64LowFirst(size_t offset = 0);
    inline uint64_t read64HighFirst(size_t offset = 0);

    virtual void write8(uint8_t value, size_t offset = 0) = 0;
    virtual void write16(uint16_t value, size_t offset = 0) = 0;
    virtual void write32(uint32_t value, size_t offset = 0) = 0;
#if defined(BITS_64)

    virtual void write64(uint64_t value, size_t offset = 0) = 0;
#endif

    void write64LowFirst(uint64_t value, size_t offset = 0);
    void write64HighFirst(uint64_t value, size_t offset = 0);

    virtual operator bool() const = 0;

  protected:
    IoBase();

  private:
    IoBase(const IoBase &);
    IoBase &operator=(const IoBase &);
};

#endif