i82443bx_hostpcibridge.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 189 行

/*
 * $Id: i82443BX_HostPCIBridge.java,v 1.1 2003/11/25 11:42:04 epr Exp $
 */
package org.jnode.driver.chipset.i440BX;

import java.util.Vector;

import org.apache.log4j.Logger;
import org.jnode.driver.Driver;
import org.jnode.driver.pci.PCIDevice;
import org.jnode.driver.ram.RAMControler;
import org.jnode.driver.ram.RAMModuleCollection;

/**
 * i82443BX_HostPCIBridge.
 * 
 * <p>
 * Title:
 * </p>
 * <p>
 * Description:
 * </p>
 * <p>
 * Licence: GNU LGPL
 * </p>
 * <p>
 * </p>
 * 
 * @author Francois-Frederic Ozog
 * @version 1.0
 */

public class i82443BX_HostPCIBridge extends Driver implements RAMControler {

	private final Logger log = Logger.getLogger(getClass());
	PCIDevice device = null;
	RAMModuleCollection ramModules = null;

	public i82443BX_HostPCIBridge() {
	}

	protected void stopDevice() throws org.jnode.driver.DriverException {
		/** @todo Implement this org.jnode.driver.Driver abstract method */
	}
	protected void startDevice() throws org.jnode.driver.DriverException {
		device = (PCIDevice) getDevice();
		initRAMControler();
	}

	/***********************************************************************************************
	 * 
	 * RAMControler interface definitions
	 */

	/**
	 * Initialize the RAM controller
	 */
	protected void initRAMControler() {
		long capacity = 0;
		double refreshRate = 0;
		ramModules = new RAMModuleCollection(8); // this chipset cannot handle more than 8 slots.

		int config = device.readConfigByte(0x57); // offset 0x56
		log.debug("RAM config:" + config);
		int type = (config & 0x18) >> 3; // bits 4-3
		switch (type) {
			case 0 :
				type = RAMControler.RAM_EDO;
				break;
			case 1 :
				type = RAMControler.RAM_SDRAM;
				break;
			case 2 :
				type = RAMControler.RAM_REGISTERED_SDRAM;
				break;
			default :
				type = -1; // error
		}
		log.debug("RAM type:" + type);
		int refreshcode = (config & 0x07);
		switch (refreshcode) {

			case 0 : // = Refresh Disabled
				refreshRate = 0;
				break;
			case 1 : // 001 = 15.6 us
				refreshRate = 15600;
				break;
			case 2 : //010 = 31.2 us
				refreshRate = 31200;
				break;
			case 3 : //011 = 62.4 us
				refreshRate = 62400;
				break;
			case 4 : //100 = 124.8 us
				refreshRate = 124800;
				break;
			case 5 : //101 = 249.6 us
				refreshRate = 249600;
				break;
			case 6 : //110 = Reserved
				refreshRate = -1;
				break;
			case 7 : //111 = Reserved
				refreshRate = -1;
				break;
		}

		log.debug("Refresh rate:" + refreshRate + " ns");
		//int bank0=device.readConfigDword(0x18, 0);
		//int bank1=device.readConfigDword(0x19, 0);
		//log.debug("DRAM bank0:" + Integer.toHexString(bank0));
		//log.debug("DRAM bank1:" + Integer.toHexString(bank1));
		int[] slots = new int[8];
		for (int i = 0; i < 8; i++)
			slots[i] = device.readConfigByte(0x60 + i) & 0xff;
		//    slots[3]=(bank0 & 0xff000000) >> 24;
		//    slots[2]=(bank0 & 0x00ff0000) >> 16;
		//    slots[1]=(bank0 & 0x0000ff00) >> 8;
		//    slots[0]=(bank0 & 0x000000ff);
		//    slots[7]=(bank1 & 0xff000000) >> 24;
		//    slots[6]=(bank1 & 0x00ff0000) >> 16;
		//    slots[5]=(bank1 & 0x0000ff00) >> 8;
		//    slots[4]=(bank1 & 0x000000ff);
		capacity = slots[0];
		log.debug("Ram slot 0: " + slots[0] * 8 + "MB");
		for (int i = 1; i < 8; i++) {
			int diff = slots[i] - slots[i - 1];
			log.debug("Ram slot " + i + ": " + diff * 8 + "MB");
			capacity += diff;
		}
		capacity *= 8;
		log.info("Total RAM Capacity: " + capacity + "MB");
	}

	public RAMModuleCollection getModulesCollection() {
		return null;
	}

	public Vector getMemoryMap() {
		return null;
	}

	public long capacity() {
		return 0;
	}

	public boolean is512KHoleEnabled() {
		return false;
	}

	public boolean is15MHoleEnabled() {
		return false;
	}

	public void enable512KHole() {
	}

	public void enable15MHole() {
	}

	public void openSMRAM() {
	}

	public void closeSMRAM() {
	}

	public void eanbleSMRAM() {
	}

	public void lockSMRAM(boolean islocked) {
	}

	public void setSMRAMLocation(long location) {
	}

	public long pageSize() {
		return 0;
	}

	public int setPagingPolicy(int clocks) {
		return 0;
	}

	public int getPagingPolicy() {
		return 0;
	}

}