1 /*
   2  * Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "memory/allocation.hpp"
  26 #include "memory/allocation.inline.hpp"
  27 #include "vm_version_ext_aarch64.hpp"
  28 
  29 // VM_Version_Ext statics
  30 int VM_Version_Ext::_no_of_threads = 0;
  31 int VM_Version_Ext::_no_of_cores = 0;
  32 int VM_Version_Ext::_no_of_sockets = 0;
  33 bool VM_Version_Ext::_initialized = false;
  34 char VM_Version_Ext::_cpu_name[CPU_TYPE_DESC_BUF_SIZE] = {0};
  35 char VM_Version_Ext::_cpu_desc[CPU_DETAILED_DESC_BUF_SIZE] = {0};
  36 
  37 void VM_Version_Ext::initialize_cpu_information(void) {
  38   // do nothing if cpu info has been initialized
  39   if (_initialized) {
  40     return;
  41   }
  42 
  43   int core_id = -1;
  44   int chip_id = -1;
  45   int len = 0;
  46   char* src_string = NULL;
  47 
  48   _no_of_cores  = os::processor_count();
  49   _no_of_threads = _no_of_cores;
  50   _no_of_sockets = _no_of_cores;
  51   snprintf(_cpu_name, CPU_TYPE_DESC_BUF_SIZE - 1, "AArch64");
  52   snprintf(_cpu_desc, CPU_DETAILED_DESC_BUF_SIZE, "AArch64 %s", cpu_features());
  53   _initialized = true;
  54 }
  55 
  56 int VM_Version_Ext::number_of_threads(void) {
  57   initialize_cpu_information();
  58   return _no_of_threads;
  59 }
  60 
  61 int VM_Version_Ext::number_of_cores(void) {
  62   initialize_cpu_information();
  63   return _no_of_cores;
  64 }
  65 
  66 int VM_Version_Ext::number_of_sockets(void) {
  67   initialize_cpu_information();
  68   return _no_of_sockets;
  69 }
  70 
  71 const char* VM_Version_Ext::cpu_name(void) {
  72   initialize_cpu_information();
  73   char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_TYPE_DESC_BUF_SIZE, mtTracing);
  74   if (NULL == tmp) {
  75     return NULL;
  76   }
  77   strncpy(tmp, _cpu_name, CPU_TYPE_DESC_BUF_SIZE);
  78   return tmp;
  79 }
  80 
  81 const char* VM_Version_Ext::cpu_description(void) {
  82   initialize_cpu_information();
  83   char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_DETAILED_DESC_BUF_SIZE, mtTracing);
  84   if (NULL == tmp) {
  85     return NULL;
  86   }
  87   strncpy(tmp, _cpu_desc, CPU_DETAILED_DESC_BUF_SIZE);
  88   return tmp;
  89 }