pcidevice.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 174 行

/*
 * $Id: PCIDevice.java,v 1.1 2003/11/25 11:41:21 epr Exp $
 */
package org.jnode.driver.pci;

import org.jnode.driver.Device;

/**
 * @author epr
 */
public class PCIDevice extends Device {

	/** The PCI system */
	private final PCIDriver pci;
	/** The bus this device is on */
	private final int bus;
	/** The unit number of this this */
	private final int unit;
	/** The function number of this device */
	private final int function;
	/** PCIConfig of this device */
	private final PCIDeviceConfig config;

	/**
	 * Create a new instance
	 * 
	 * @param bus
	 * @param unit
	 * @param function
	 */
	public PCIDevice(PCIBus bus, int unit, int function) {
		super(bus, "pci(" + bus.getBus() + "," + unit + "," + function + ")");
		this.pci = bus.getPCI();
		this.bus = bus.getBus();
		this.unit = unit;
		this.function = function;
		this.config = new PCIDeviceConfig(this);
	}

	/**
	 * Gets the bus this device is on
	 */
	public int getPCIBus() {
		return bus;
	}

	/**
	 * Gets the function number of this device
	 */
	public int getFunction() {
		return function;
	}

	/**
	 * Gets the unit number of this device
	 */
	public int getUnit() {
		return unit;
	}

	/**
	 * Gets the PCI configuration for this device
	 */
	public PCIDeviceConfig getConfig() {
		return config;
	}
	
	/**
	 * Is this a bridge device.
	 */
	public final boolean isBridge() {
		return (config.getBaseClass() == PCIConstants.CLASS_BRIDGE);
	}

	/**
	 * Read a configuration dword for this device.
	 * 
	 * @param register
	 * @param type
	 */
	protected int readConfigDword(int register, int type) {
		return pci.readConfigDword(bus, unit, function, register, type);
	}

	/**
	 * Read a configuration dword for this device at a given offset
	 * @param offset
	 */
	public final int readConfigDword(int offset) {
		return pci.readConfigDword(bus, unit, function, offset);
	}

	/**
	 * Read a configuration word for this device at a given offset
	 * @param offset
	 */
	public final int readConfigWord(int offset) {
		return pci.readConfigWord(bus, unit, function, offset);
	}

	/**
	 * Read a configuration byte for this device at a given offset
	 * @param offset
	 */
	public final int readConfigByte(int offset) {
		return pci.readConfigByte(bus, unit, function, offset);
	}

	/**
	 * Write a configuration dword for this device.
	 * 
	 * @param register
	 * @param type
	 * @param value
	 */
	protected final void writeConfigDword(int register, int type, int value) {
		pci.writeConfigDword(bus, unit, function, register, type, value);
	}

	/**
	 * Write a configuration dword for this device at a given offset
	 * 
	 * @param offset
	 * @param value
	 */
	public final void writeConfigDword(int offset, int value) {
		pci.writeConfigDword(bus, unit, function, offset, value);
	}

	/**
	 * Write a configuration word for this device at a given offset
	 * 
	 * @param offset
	 * @param value
	 */
	public final void writeConfigWord(int offset, int value) {
		pci.writeConfigWord(bus, unit, function, offset, value);
	}

	/**
	 * Write a configuration byte for this device at a given offset
	 * 
	 * @param offset
	 * @param value
	 */
	public final void writeConfigByte(int offset, int value) {
		pci.writeConfigByte(bus, unit, function, offset, value);
	}

	/**
	 * Gets the name containing bus,unit,function.
	 */
	public final String getPCIName() {
		return "" + bus + "," + unit + "," + function;
	}
	
	/**
	 * Gets the PCI bus API.
	 */
	public final PCIBusAPI getPCIBusAPI() {
		return pci;
	}
	
	/**
	 * Convert to a String representation
	 * @see java.lang.Object#toString()
	 */
	public String toString() {
		String cname = getClass().getName();
		cname = cname.substring(cname.lastIndexOf('.') + 1);
		return cname + "[" + getId() + ": " + getConfig().toString() + "]";
	}
}