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