irq.hxx

C++ 编写的EROS RTOS

#ifndef __IRQ_HXX__
#define __IRQ_HXX__
/*
 * Copyright (C) 1998, 1999, Jonathan S. Shapiro.
 *
 * This file is part of the EROS Operating System.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

struct fixregs_t;
typedef void (*InterruptHandler)(fixregs_t*);

class IRQ {
private:
  static uint32_t DisableDepth;

  static uint32_t enableMask;

public:
  static inline void DISABLE();
  static inline void ENABLE();
  static inline bool INTERRUPTS_ENABLED()
  {
    return (DisableDepth == 0) ? true : false;
  }

  static inline uint32_t DISABLE_DEPTH()
  {
    return DisableDepth;
  }

  static inline bool InterruptsAreEnabled()
  {
    return (DisableDepth ==0 ) ? true : false;
  }

  /* Interrupt initialization */
  static void SetHandler(uint32_t irq, InterruptHandler);
  static InterruptHandler GetHandler(uint32_t irq);
  static void UnsetHandler(uint32_t irq);

  static void Enable(uint32_t irq);
  static void Disable(uint32_t irq);
  
  static bool IsEnabled(uint32_t irq)
  {
    return (enableMask & (1u << irq)) ? true : false;
  }

  static void UnboundInterrupt(fixregs_t*);
};

#include <arch-kerninc/IRQ-inline.hxx>

#endif /* __IRQ_HXX__ */