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 41 namespace v8 { 42 namespace 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 53 class 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
