Hardware/CPU/IntelCPU.cs
author moel.mich
Mon, 01 Feb 2010 21:04:14 +0000
changeset 18 49220085218d
parent 7 9523a3322777
child 22 e6832d4b89d2
permissions -rw-r--r--
Release version 0.1.7. Improved report writer.
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/*
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  Version: MPL 1.1/GPL 2.0/LGPL 2.1
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  The contents of this file are subject to the Mozilla Public License Version
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  1.1 (the "License"); you may not use this file except in compliance with
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  the License. You may obtain a copy of the License at
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  http://www.mozilla.org/MPL/
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  Software distributed under the License is distributed on an "AS IS" basis,
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  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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  for the specific language governing rights and limitations under the License.
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  The Original Code is the Open Hardware Monitor code.
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  The Initial Developer of the Original Code is 
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  Michael Möller <m.moeller@gmx.ch>.
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  Portions created by the Initial Developer are Copyright (C) 2009-2010
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  the Initial Developer. All Rights Reserved.
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  Contributor(s):
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  Alternatively, the contents of this file may be used under the terms of
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  either the GNU General Public License Version 2 or later (the "GPL"), or
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  the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  in which case the provisions of the GPL or the LGPL are applicable instead
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  of those above. If you wish to allow use of your version of this file only
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  under the terms of either the GPL or the LGPL, and not to allow others to
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  use your version of this file under the terms of the MPL, indicate your
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  decision by deleting the provisions above and replace them with the notice
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  and other provisions required by the GPL or the LGPL. If you do not delete
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  the provisions above, a recipient may use your version of this file under
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  the terms of any one of the MPL, the GPL or the LGPL.
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*/
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Reflection;
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using System.Text;
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namespace OpenHardwareMonitor.Hardware.CPU {
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  public class IntelCPU : IHardware {
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    private string name;
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    private Image icon;
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    private Sensor[] coreTemperatures;
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    private float tjMax = 0;
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    private uint logicalProcessorsPerCore;
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    private const uint IA32_THERM_STATUS_MSR = 0x019C;
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    private const uint IA32_TEMPERATURE_TARGET = 0x01A2;
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    public IntelCPU(string name, uint family, uint model, uint stepping, 
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      uint[,] cpuidData, uint[,] cpuidExtData) {
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      this.name = name;
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      this.icon = Utilities.EmbeddedResources.GetImage("cpu.png");
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      uint logicalProcessors = 1;
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      if (cpuidData.GetLength(0) > 0x04)
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        logicalProcessors = ((cpuidData[4, 0] >> 26) & 0x3F) + 1;
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      logicalProcessorsPerCore = 1;
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      if (cpuidData.GetLength(0) > 0x0B)
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        logicalProcessorsPerCore = cpuidData[0x0B, 1] & 0xFF;
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      if (logicalProcessorsPerCore == 0)
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        logicalProcessorsPerCore = 1;
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      uint coreCount = logicalProcessors / logicalProcessorsPerCore;
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      switch (family) {
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        case 0x06: {
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          switch (model) {
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            case 0x0F: // Intel Core 65nm
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              switch (stepping) {
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                case 0x06: // B2
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                  switch (coreCount) {
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                    case 2:
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                      tjMax = 80; break;
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                    case 4:
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                      tjMax = 90; break;
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                    default:
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                      tjMax = 85; break;
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                  }
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                  tjMax = 80; break;
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                case 0x0B: // G0
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                  tjMax = 90; break;
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                case 0x0D: // M0
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                  tjMax = 85; break;
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                default:
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                  tjMax = 85; break;
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              } break;            
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            case 0x17: // Intel Core 45nm
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              tjMax = 100; break;
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            case 0x1C: // Intel Atom 
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              tjMax = 90; break;
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            case 0x1A:
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              uint eax = 0, edx = 0;
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              if (WinRing0.RdmsrPx(
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                  IA32_TEMPERATURE_TARGET, ref eax, ref edx, (UIntPtr)1)) {
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                tjMax = (eax >> 16) & 0xFF;
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              } else
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                tjMax = 100;
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              break;
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            default:
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              tjMax = 100; break;
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          }
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        } break;
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        default: tjMax = 100; break;
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      }
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      coreTemperatures = new Sensor[coreCount];
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      for (int i = 0; i < coreTemperatures.Length; i++)
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        coreTemperatures[i] =
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          new Sensor("Core #" + (i + 1), i, tjMax, SensorType.Temperature, 
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            this);
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      Update();                   
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    }
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    public string Name {
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      get { return name; }
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    }
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    public string Identifier {
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      get { return "/intelcpu/0"; }
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    }
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    public Image Icon {
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      get { return icon; }
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    }
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    public ISensor[] Sensors {
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      get {
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        return coreTemperatures;
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      }
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    }
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    public string GetReport() {
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      StringBuilder r = new StringBuilder();
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      r.AppendLine("Intel CPU");
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      r.AppendLine();
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      r.AppendFormat("Name: {0}{1}", name, Environment.NewLine);
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      r.AppendFormat("Number of cores: {0}{1}", coreTemperatures.Length, 
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        Environment.NewLine);
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      r.AppendFormat("TjMax: {0}{1}", tjMax, Environment.NewLine);
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      r.AppendLine();
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      return r.ToString();
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    }
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    public void Update() {
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      uint eax = 0, edx = 0;      
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      for (int i = 0; i < coreTemperatures.Length; i++) {
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        if (WinRing0.RdmsrPx(
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          IA32_THERM_STATUS_MSR, ref eax, ref edx, 
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            (UIntPtr)(1 << (int)(logicalProcessorsPerCore * i)))) 
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        {
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          // if reading is valid
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          if ((eax & 0x80000000) != 0) {
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            // get the dist from tjMax from bits 22:16
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            coreTemperatures[i].Value = tjMax - ((eax & 0x007F0000) >> 16);
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          }
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        }        
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      }  
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    }
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    #pragma warning disable 67
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    public event SensorEventHandler SensorAdded;
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    public event SensorEventHandler SensorRemoved;
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    #pragma warning restore 67
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  }
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}