cpu.h

Go to the documentation of this file.

// Copyright 2006-2008 the V8 project authors. 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.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// 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
// OWNER 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.

// This module contains the architecture-specific code. This make the rest of
// the code less dependent on differences between different processor
// architecture.
// The classes have the same definition for all architectures. The
// implementation for a particular architecture is put in cpu_<arch>.cc.
// The build system then uses the implementation for the target architecture.
//

#ifndef V8_CPU_H_
#define V8_CPU_H_

#include "allocation.h"

namespace v8 {
namespace internal {

// ----------------------------------------------------------------------------
// CPU
//
// This class has static methods for the architecture specific functions. Add
// methods here to cope with differences between the supported architectures.
//
// For each architecture the file cpu_<arch>.cc contains the implementation of
// these functions.

class CPU : public AllStatic {
 public:
  // Initializes the cpu architecture support. Called once at VM startup.
  static void SetUp();

  static bool SupportsCrankshaft();

  // Flush instruction cache.
  static void FlushICache(void* start, size_t size);

  // Try to activate a system level debugger.
  static void DebugBreak();
};

} }  // namespace v8::internal

#endif  // V8_CPU_H_