| // 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" |
| #include "vm/simulator.h" |
| |
| #if !defined(USING_SIMULATOR) |
| #if !defined(HOST_OS_FUCHSIA) |
| #include <sys/syscall.h> |
| #else |
| #include <zircon/syscalls.h> |
| #endif |
| #include <unistd.h> |
| #endif |
| |
| namespace dart { |
| |
| void CPU::FlushICache(uword start, uword size) { |
| #if HOST_OS_IOS |
| // Precompilation never patches code so there should be no I cache flushes. |
| UNREACHABLE(); |
| #endif |
| |
| #if !defined(USING_SIMULATOR) && !HOST_OS_IOS |
| // Nothing to do. Flushing no instructions. |
| if (size == 0) { |
| return; |
| } |
| |
| // ARM recommends using the gcc intrinsic __clear_cache on Linux and Android. |
| // blogs.arm.com/software-enablement/141-caches-and-self-modifying-code/ |
| #if defined(HOST_OS_ANDROID) || defined(HOST_OS_LINUX) |
| extern void __clear_cache(char*, char*); |
| char* beg = reinterpret_cast<char*>(start); |
| char* end = reinterpret_cast<char*>(start + size); |
| ::__clear_cache(beg, end); |
| #elif defined(HOST_OS_FUCHSIA) |
| zx_status_t result = zx_cache_flush(reinterpret_cast<const void*>(start), |
| size, ZX_CACHE_FLUSH_INSN); |
| ASSERT(result == ZX_OK); |
| #else |
| #error FlushICache only tested/supported on Android, Fuchsia, and Linux |
| #endif |
| |
| #endif |
| } |
| |
| const char* CPU::Id() { |
| return |
| #if defined(USING_SIMULATOR) |
| "sim" |
| #endif // !defined(HOST_ARCH_ARM64) |
| "arm64"; |
| } |
| |
| const char* HostCPUFeatures::hardware_ = NULL; |
| #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_ != NULL); |
| free(const_cast<char*>(hardware_)); |
| hardware_ = NULL; |
| 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_ != NULL); |
| free(const_cast<char*>(hardware_)); |
| hardware_ = NULL; |
| CpuInfo::Cleanup(); |
| } |
| #endif // !defined(USING_SIMULATOR) |
| |
| } // namespace dart |
| |
| #endif // defined TARGET_ARCH_ARM64 |