1// Copyright 2012 the V8 project authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5// CPU specific code for arm independent of OS goes here.
6
7#include <sys/syscall.h>
8#include <unistd.h>
9
10#ifdef __mips
11#include <asm/cachectl.h>
12#endif  // #ifdef __mips
13
14#if V8_TARGET_ARCH_MIPS
15
16#include "src/codegen/cpu-features.h"
17
18namespace v8 {
19namespace internal {
20
21void CpuFeatures::FlushICache(void* start, size_t size) {
22#if !defined(USE_SIMULATOR)
23  // Nothing to do, flushing no instructions.
24  if (size == 0) {
25    return;
26  }
27
28#if defined(ANDROID)
29  // Bionic cacheflush can typically run in userland, avoiding kernel call.
30  char* end = reinterpret_cast<char*>(start) + size;
31  cacheflush(reinterpret_cast<intptr_t>(start), reinterpret_cast<intptr_t>(end),
32             0);
33#else   // ANDROID
34  int res;
35  // See http://www.linux-mips.org/wiki/Cacheflush_Syscall.
36  res = syscall(__NR_cacheflush, start, size, ICACHE);
37  if (res) FATAL("Failed to flush the instruction cache");
38#endif  // ANDROID
39#endif  // !USE_SIMULATOR.
40}
41
42}  // namespace internal
43}  // namespace v8
44
45#endif  // V8_TARGET_ARCH_MIPS
46