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// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "vm/globals.h"
#if defined(TARGET_ARCH_ARM64)
#include "vm/cpu.h"
#include "vm/cpu_arm64.h"
#include "vm/cpuinfo.h"
#if !defined(USING_SIMULATOR)
#if defined(DART_HOST_OS_FUCHSIA)
#include <zircon/syscalls.h>
#elif defined(DART_HOST_OS_MACOS) || defined(DART_HOST_OS_IOS)
#include <libkern/OSCacheControl.h>
#elif defined(DART_HOST_OS_WINDOWS)
#include <processthreadsapi.h>
#endif
#endif
namespace dart {
void CPU::FlushICache(uword start, uword size) {
#if defined(DART_PRECOMPILED_RUNTIME)
UNREACHABLE();
#elif !defined(USING_SIMULATOR)
// Nothing to do. Flushing no instructions.
if (size == 0) {
return;
}
// ARM recommends using the gcc intrinsic __clear_cache on Linux and Android.
//
// https://community.arm.com/developer/ip-products/processors/b/processors-ip-blog/posts/caches-and-self-modifying-code
//
// On iOS we use sys_icache_invalidate from Darwin. See:
//
// https://developer.apple.com/library/archive/documentation/System/Conceptual/ManPages_iPhoneOS/man3/sys_icache_invalidate.3.html
#if defined(DART_HOST_OS_MACOS) || defined(DART_HOST_OS_IOS)
sys_icache_invalidate(reinterpret_cast<void*>(start), size);
#elif defined(DART_HOST_OS_ANDROID) || defined(DART_HOST_OS_LINUX)
char* beg = reinterpret_cast<char*>(start);
char* end = reinterpret_cast<char*>(start + size);
__builtin___clear_cache(beg, end);
#elif defined(DART_HOST_OS_FUCHSIA)
zx_status_t result = zx_cache_flush(reinterpret_cast<const void*>(start),
size, ZX_CACHE_FLUSH_INSN);
ASSERT(result == ZX_OK);
#elif defined(DART_HOST_OS_WINDOWS)
BOOL result = FlushInstructionCache(
GetCurrentProcess(), reinterpret_cast<const void*>(start), size);
ASSERT(result != 0);
#else
#error FlushICache not implemented for this OS
#endif
#endif
}
const char* CPU::Id() {
return
#if defined(USING_SIMULATOR)
"sim"
#endif // !defined(USING_SIMULATOR)
"arm64";
}
const char* HostCPUFeatures::hardware_ = nullptr;
#if defined(DEBUG)
bool HostCPUFeatures::initialized_ = false;
#endif
#if !defined(USING_SIMULATOR)
void HostCPUFeatures::Init() {
CpuInfo::Init();
hardware_ = CpuInfo::GetCpuModel();
#if defined(DEBUG)
initialized_ = true;
#endif
}
void HostCPUFeatures::Cleanup() {
DEBUG_ASSERT(initialized_);
#if defined(DEBUG)
initialized_ = false;
#endif
ASSERT(hardware_ != nullptr);
free(const_cast<char*>(hardware_));
hardware_ = nullptr;
CpuInfo::Cleanup();
}
#else // !defined(USING_SIMULATOR)
void HostCPUFeatures::Init() {
CpuInfo::Init();
hardware_ = CpuInfo::GetCpuModel();
#if defined(DEBUG)
initialized_ = true;
#endif
}
void HostCPUFeatures::Cleanup() {
DEBUG_ASSERT(initialized_);
#if defined(DEBUG)
initialized_ = false;
#endif
ASSERT(hardware_ != nullptr);
free(const_cast<char*>(hardware_));
hardware_ = nullptr;
CpuInfo::Cleanup();
}
#endif // !defined(USING_SIMULATOR)
} // namespace dart
#endif // defined TARGET_ARCH_ARM64