nvidiavgaio.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 268 行

/*
 * $Id: NVidiaVgaIO.java,v 1.3 2004/01/04 11:01:58 epr Exp $
 */
package org.jnode.driver.video.nvidia;

import org.jnode.driver.video.vgahw.VgaConstants;
import org.jnode.driver.video.vgahw.VgaIO;
import org.jnode.driver.video.vgahw.VgaUtils;
import org.jnode.system.MemoryResource;

/**
 * @author Ewout Prangsma ([e-mail])
 */
public final class NVidiaVgaIO implements VgaIO, VgaConstants, NVidiaConstants {

	private final MemoryResource mmio;
	private final MemoryResource mem;

	private static final int PFB_OFS     = 0x00100000;
	private static final int PFIFO_OFS   = 0x00002000;
	private static final int PDIO_OFS    = 0x00681000;

	/**
	 * Create a new instance
	 * @param mmio
	 */
	public NVidiaVgaIO(MemoryResource mmio, MemoryResource mem) {
		this.mmio = mmio;
		this.mem = mem;
	}
	
	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getATT(int)
	 */
	public int getATT(int index) {
		getSTAT();
		mmio.setByte(NV8_ATTRINDW, (byte) (index | 0x20));
		return mmio.getByte(NV8_ATTRDATR) & 0xff;
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getCRT(int)
	 */
	public int getCRT(int index) {
		mmio.setByte(NV8_CRTCIND, (byte) index);
		return mmio.getByte(NV8_CRTCDAT) & 0xff;
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getDACData()
	 */
	public int getDACData() {
		return mmio.getByte(PDIO_OFS + DAC_D) & 0xFF;
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getGRAF(int)
	 */
	public int getGRAF(int index) {
		mmio.setByte(NV8_GRPHIND, (byte) index);
		return mmio.getByte(NV8_GRPHDAT) & 0xff;
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getMISC()
	 */
	public int getMISC() {
		return mmio.getByte(NV8_MISCR) & 0xff;
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getSEQ(int)
	 */
	public int getSEQ(int index) {
		mmio.setByte(NV8_SEQIND, (byte) index);
		return mmio.getByte(NV8_SEQDAT) & 0xff;
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getSTAT()
	 */
	public int getSTAT() {
		return mmio.getByte(NV8_INSTAT1) & 0xff;
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setATT(int, int)
	 */
	public void setATT(int index, int val) {
		getSTAT();
		mmio.setByte(NV8_ATTRINDW, (byte) (index | 0x20));
		mmio.setByte(NV8_ATTRDATW, (byte) val);
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setATTIndex(int)
	 */
	public void setATTIndex(int index) {
		getSTAT();
		mmio.setByte(NV8_ATTRINDW, (byte) (index | 0x20));
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setCRT(int, int)
	 */
	public void setCRT(int index, int val) {
		mmio.setShort(NV16_CRTCIND, (short)((index & 0xFF) | ((val & 0xFF) << 8)));
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setDACData(int)
	 */
	public void setDACData(int data) {
		setReg8(NV8_PALDATA, data);
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setDACReadIndex(int)
	 */
	public void setDACReadIndex(int index) {
		setReg8(NV8_PALINDR, index);
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setDACWriteIndex(int)
	 */
	public void setDACWriteIndex(int index) {
		setReg8(NV8_PALINDW, index);
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setGRAF(int, int)
	 */
	public void setGRAF(int index, int val) {
		mmio.setShort(NV16_GRPHIND, (short)((index & 0xFF) | ((val & 0xFF) << 8)));
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setMISC(int)
	 */
	public void setMISC(int val) {
		setSEQ(0, 1);
		mmio.setByte(NV8_MISCW, (byte) val);
		setSEQ(0, 3);
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#setSEQ(int, int)
	 */
	public void setSEQ(int index, int val) {
		mmio.setShort(NV16_SEQIND, (short)((index & 0xFF) | ((val & 0xFF) << 8)));
	}

	/**
	 * @see org.jnode.driver.video.vgahw.VgaIO#getVideoMem()
	 */
	public MemoryResource getVideoMem() {
		return mem;
	}
	
	/**
	 * Set a FB value at the given offset
	 * @param offset
	 * @param value
	 */
	public void setFB(int offset, int value) {
		mmio.setInt(PFB_OFS + offset, value);
	}
	
	/**
	 * Get a FB value at the given offset
	 * @param offset
	 */
	public int getFB(int offset) {
		return mmio.getInt(PFB_OFS + offset);
	}
	
	/**
	 * Set a FIFO value at the given offset
	 * @param offset
	 * @param value
	 */
	public void setFIFO(int offset, int value) {
		mmio.setInt(PFIFO_OFS + offset, value);
	}
	
	/**
	 * Gets an 8-bit MMIO value
	 * @param index
	 * @return
	 */
	final int getReg8(int index) {
		return mmio.getByte(index) & 0xFF;
	}

	/**
	 * Gets an 16-bit MMIO value
	 * @param index
	 * @return
	 */
	final int getReg16(int index) {
		return mmio.getShort(index) & 0xFFFF;
	}

	/**
	 * Gets an 32-bit MMIO value
	 * @param index
	 * @return
	 */
	final int getReg32(int index) {
		return mmio.getInt(index);
	}

	/**
	 * Sets an 8-bit MMIO value
	 * @param index
	 */
	final void setReg8(int index, int value) {
		mmio.setByte(index, (byte) value);
	}

	/**
	 * Gets an 16-bit MMIO value
	 * @param index
	 */
	final void setReg16(int index, int value) {
		mmio.setShort(index, (short) value);
	}

	/**
	 * Gets an 32-bit MMIO value
	 * @param index
	 */
	final void setReg32(int index, int value) {
		mmio.setInt(index, value);
	}

	/**
	 * Disable access to extended registers
	 */
	final void lock() {
		lockUnlock(true);
	}
	
	/**
	 * Enable access to extended registers
	 */
	final void unlock() {
		lockUnlock(false);
	}
	
	/**
	 * Enable/Disable access to extended registers
	 * @param lock
	 */
	private final void lockUnlock(boolean lock) {
		//final int value = (lock) ? 0x99 : 0x57;
		if (lock) {
			//VgaUtils.lockCRTC(this);
		} else {
			setCRT(NVCRTCX_LOCK, 0x57);
			VgaUtils.unlockCRTC(this);
			setCRT(NVCRTCX_LOCK, 0x57);
		}
	}
	
}