Refactors CPU feature detection.

runtime/vm/cpu_mips.cc

 // Copyright (c) 2013, 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_MIPS)
 
+#include "vm/cpu.h"
+#include "vm/cpuinfo.h"
+#include "vm/simulator.h"
+
 #if defined(HOST_ARCH_MIPS)
 #include <asm/cachectl.h> /* NOLINT */
 #include <sys/syscall.h>  /* NOLINT */
 #include <unistd.h>  /* NOLINT */
 #endif
 
-#include "vm/cpu.h"
-
 namespace dart {
 
 void CPU::FlushICache(uword start, uword size) {
 #if defined(HOST_ARCH_MIPS)
   int res;
   // See http://www.linux-mips.org/wiki/Cacheflush_Syscall.
   res = syscall(__NR_cacheflush, start, size, ICACHE);
   ASSERT(res == 0);
 #else  // defined(HOST_ARCH_MIPS)
   // When running in simulated mode we do not need to flush the ICache because
   // we are not running on the actual hardware.
 #endif  // defined(HOST_ARCH_MIPS)
 }
 
 
 const char* CPU::Id() {
   return
 #if !defined(HOST_ARCH_MIPS)
   "sim"
 #endif  // !defined(HOST_ARCH_MIPS)
   "mips";
 }
 
+
+char CPUFeatures::hardware_[HARDWARE_LEN] = {0};
+#if defined(DEBUG)
+bool CPUFeatures::initialized_ = false;
+#endif
+
+
+char* CPUFeatures::hardware() {
+  DEBUG_ASSERT(initialized_);
+  return hardware_;
+}
+
+
+void CPUFeatures::InitOnce() {
+  CpuInfo::Read();
+  CpuInfo::GetCpuModel(hardware_, HARDWARE_LEN);
+#if !defined(USING_SIMULATOR)
+  // Has a floating point unit.
+  ASSERT(CpuInfo::FieldContains("cpu model", "FPU"));
+#endif  // defined(USING_SIMULATOR)
+#if defined(DEBUG)
+  initialized_ = true;
+#endif
+}
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS