cpu_riscv.cc

Go to the documentation of this file.

// Copyright (c) 2021, 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_RISCV32) || defined(TARGET_ARCH_RISCV64)
 
#include "vm/cpu.h"
#include "vm/cpu_riscv.h"
 
#include "vm/cpuinfo.h"
 
#if !defined(USING_SIMULATOR)
#if !defined(DART_HOST_OS_FUCHSIA)
#include <sys/syscall.h>
#else
#include <zircon/syscalls.h>
#endif
#include <unistd.h>
#endif
 
#if defined(DART_HOST_OS_MACOS) || defined(DART_HOST_OS_IOS)
#include <libkern/OSCacheControl.h>
#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;
  }
 
#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);
#else
#error FlushICache not implemented for this OS
#endif
 
#endif
}
 
const char* CPU::Id() {
  return
#if defined(USING_SIMULATOR)
      "sim"
#endif  // !defined(USING_SIMULATOR)
#if defined(TARGET_ARCH_RISCV32)
      "riscv32";
#elif defined(TARGET_ARCH_RISCV64)
      "riscv64";
#else
#error What XLEN?
#endif
}
 
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_RISCV