kernel/core/processor/hosted/InterruptManager.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_HOSTED_INTERRUPTMANAGER_H
#define KERNEL_PROCESSOR_HOSTED_INTERRUPTMANAGER_H
#include "pedigree/kernel/Spinlock.h"
#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/InterruptManager.h"
#include "pedigree/kernel/processor/state_forward.h"
#include "pedigree/kernel/processor/types.h"
 
#include <config.h>
#include <signal.h>
 
#define MAX_SIGNAL 32
 
class HostedInterruptManager : public ::InterruptManager {
 public:
  inline static HostedInterruptManager& instance() {
    return m_Instance;
  }
 
  virtual bool registerInterruptHandler(size_t nInterruptNumber, InterruptHandler* pHandler);
 
#if DEBUGGER
  virtual bool registerInterruptHandlerDebugger(size_t nInterruptNumber,
                                                InterruptHandler* pHandler);
  virtual size_t getBreakpointInterruptNumber() PURE;
  virtual size_t getDebugInterruptNumber() PURE;
#endif
 
  static void initialiseProcessor() INITIALISATION_ONLY;
 
  static void quiesceProcessor();
 
  void signalShim(int which, void* siginfo, void* meta, bool fromUserspace);
 
  struct sigaction getOriginalSigaction(int which) const;
 
#if HOSTED && PEDIGREE_HOSTED_SMOKE_TESTS
  using MutationLockHook = void (*)();
 
  static EXPORTED_PUBLIC void withMutationLockForTest(MutationLockHook hook);
#endif
 
 private:
  static void interrupt(InterruptState& interruptState);
 
  void setInterruptGate(size_t nInterruptNumber, uintptr_t interruptHandler) INITIALISATION_ONLY;
  void setIst(size_t nInterruptNumber, size_t ist);
  HostedInterruptManager() INITIALISATION_ONLY;
  HostedInterruptManager(const HostedInterruptManager&);
  HostedInterruptManager& operator=(const HostedInterruptManager&);
  virtual ~HostedInterruptManager();
 
  Spinlock m_Lock;
 
  InterruptHandler* m_pHandler[MAX_SIGNAL];
#if DEBUGGER
  InterruptHandler* m_pDbgHandler[MAX_SIGNAL];
#endif
 
  static struct sigaction m_OriginalActions[MAX_SIGNAL];
  static bool m_ActionInstalled[MAX_SIGNAL];
 
  static bool m_bQuiesced;
 
  static HostedInterruptManager m_Instance;
};
 
#endif