Chinmay Garde
87ce99fd00
R=rmacnak@google.com Review URL: https://codereview.chromium.org/1411383004 .
109 lines
2.3 KiB
C++
109 lines
2.3 KiB
C++
// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#if defined(TARGET_ARCH_ARM64)
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#include "vm/cpu.h"
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#include "vm/cpuinfo.h"
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#include "vm/simulator.h"
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#if !defined(USING_SIMULATOR)
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#include <sys/syscall.h> /* NOLINT */
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#include <unistd.h> /* NOLINT */
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#endif
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namespace dart {
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void CPU::FlushICache(uword start, uword size) {
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#if TARGET_OS_IOS
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// Precompilation never patches code so there should be no I cache flushes.
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UNREACHABLE();
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#endif
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#if !defined(USING_SIMULATOR) && !TARGET_OS_IOS
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// Nothing to do. Flushing no instructions.
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if (size == 0) {
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return;
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}
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// ARM recommends using the gcc intrinsic __clear_cache on Linux and Android.
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// blogs.arm.com/software-enablement/141-caches-and-self-modifying-code/
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#if defined(__linux__) || defined(ANDROID)
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extern void __clear_cache(char*, char*);
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char* beg = reinterpret_cast<char*>(start);
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char* end = reinterpret_cast<char*>(start + size);
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::__clear_cache(beg, end);
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#else
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#error FlushICache only tested/supported on Linux and Android
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#endif
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#endif
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}
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const char* CPU::Id() {
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return
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#if defined(USING_SIMULATOR)
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"sim"
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#endif // !defined(HOST_ARCH_ARM64)
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"arm64";
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}
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const char* HostCPUFeatures::hardware_ = NULL;
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#if defined(DEBUG)
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bool HostCPUFeatures::initialized_ = false;
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#endif
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#if !defined(USING_SIMULATOR)
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void HostCPUFeatures::InitOnce() {
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CpuInfo::InitOnce();
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hardware_ = CpuInfo::GetCpuModel();
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#if defined(DEBUG)
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initialized_ = true;
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#endif
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}
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void HostCPUFeatures::Cleanup() {
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DEBUG_ASSERT(initialized_);
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#if defined(DEBUG)
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initialized_ = false;
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#endif
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ASSERT(hardware_ != NULL);
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free(const_cast<char*>(hardware_));
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hardware_ = NULL;
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CpuInfo::Cleanup();
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}
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#else // !defined(USING_SIMULATOR)
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void HostCPUFeatures::InitOnce() {
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CpuInfo::InitOnce();
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hardware_ = CpuInfo::GetCpuModel();
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#if defined(DEBUG)
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initialized_ = true;
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#endif
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}
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void HostCPUFeatures::Cleanup() {
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DEBUG_ASSERT(initialized_);
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#if defined(DEBUG)
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initialized_ = false;
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#endif
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ASSERT(hardware_ != NULL);
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free(const_cast<char*>(hardware_));
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hardware_ = NULL;
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CpuInfo::Cleanup();
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}
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#endif // !defined(USING_SIMULATOR)
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} // namespace dart
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#endif // defined TARGET_ARCH_ARM64
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