IrqHandler.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_MACHINE_IRQHANDLER_H
#define KERNEL_MACHINE_IRQHANDLER_H
 
#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/machine/types.h"
#include "pedigree/kernel/processor/state_forward.h"
 
enum class IrqDisposition {
  NotHandled,
  Handled,
  Quiesced,
};
 
enum class HardIrqDisposition {
  NotHandled = 0,
  Handled,
  KeepMasked,
};
 
class EXPORTED_PUBLIC IrqHandlerBase {
 protected:
  IrqHandlerBase();
 
  virtual ~IrqHandlerBase();
};
 
class EXPORTED_PUBLIC IrqHandler : public IrqHandlerBase {
 public:
  IrqHandler();
 
  virtual IrqDisposition irq(irq_id_t number) = 0;
 
  virtual bool acceptsSpuriousInterrupts() const {
    return false;
  }
 
 protected:
  virtual ~IrqHandler();
};
 
class EXPORTED_PUBLIC HardIrqHandler : public IrqHandlerBase {
 public:
  HardIrqHandler();
 
  virtual HardIrqDisposition irq(irq_id_t number, InterruptState& state) = 0;
 
 protected:
  virtual ~HardIrqHandler();
};
 
#endif