cpu.h revision 3ef787dbeca8a5fb1086949cda830dccee07bfbd
1// Copyright 2006-2008 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// This module contains the architecture-specific code. This make the rest of 29// the code less dependent on differences between different processor 30// architecture. 31// The classes have the same definition for all architectures. The 32// implementation for a particular architecture is put in cpu_<arch>.cc. 33// The build system then uses the implementation for the target architecture. 34// 35 36#ifndef V8_CPU_H_ 37#define V8_CPU_H_ 38 39#include "allocation.h" 40 41namespace v8 { 42namespace internal { 43 44// ---------------------------------------------------------------------------- 45// CPU 46// 47// This class has static methods for the architecture specific functions. Add 48// methods here to cope with differences between the supported architectures. 49// 50// For each architecture the file cpu_<arch>.cc contains the implementation of 51// these functions. 52 53class CPU : public AllStatic { 54 public: 55 // Initializes the cpu architecture support. Called once at VM startup. 56 static void SetUp(); 57 58 static bool SupportsCrankshaft(); 59 60 // Flush instruction cache. 61 static void FlushICache(void* start, size_t size); 62 63 // Try to activate a system level debugger. 64 static void DebugBreak(); 65}; 66 67} } // namespace v8::internal 68 69#endif // V8_CPU_H_ 70