mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-27 22:12:25 +00:00
524 lines
No EOL
19 KiB
C#
524 lines
No EOL
19 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace Cosmos.Hardware.PC.Bus {
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public class PCIBus : Cosmos.Hardware.Bus.PCIBus {
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protected static PCIDevice[] mDevices;
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public static PCIDevice[] Devices {
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get { return mDevices; }
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}
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protected static bool mEnumerationCompleted = false;
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public static PCIDevice GetPCIDevice(byte bus, byte slot, byte function) {
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if (!mEnumerationCompleted) {
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Init();
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}
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foreach (PCIDevice dev in PCIBus.Devices) {
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if (dev.Bus == bus &&
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dev.Slot == slot &&
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dev.Function == function)
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return dev;
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}
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return null;
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}
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public static void Init() {
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var xDevices = new List<PCIDevice>();
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EnumerateBus(0, ref xDevices);
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mDevices = xDevices.ToArray();
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mEnumerationCompleted = true;
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}
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/// <summary>
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/// Enumerates a given bus, adding devices to Devices
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/// </summary>
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/// <param name="Bus">The bus number to enumerate</param>
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/// <param name="Devices">The list of Devices</param>
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private static void EnumerateBus(byte aBus, ref List<PCIDevice> rDevices) {
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//Console.WriteLine("Enumerate " + Bus );
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for (byte xSlot = 0; xSlot < 32; xSlot++) {
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byte xMaxFunctions = 1;
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for (byte xFunction = 0; xFunction < xMaxFunctions; xFunction++) {
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PCIDevice xPCIDevice = new PCIDeviceNormal(aBus, xSlot, xFunction);
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if (xPCIDevice.DeviceExists) {
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//if (xPCIDevice.HeaderType == 0 /* PCIHeaderType.Normal */)
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// xPCIDevice = xPCIDevice;
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if (xPCIDevice.HeaderType == 2) { /* PCIHeaderType.Cardbus */
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xPCIDevice = new PCIDeviceCardBus(aBus, xSlot, xFunction);
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}
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if (xPCIDevice.HeaderType == 1) { /* PCIHeaderType.Bridge */
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xPCIDevice = new PCIDeviceBridge(aBus, xSlot, xFunction);
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}
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rDevices.Add(xPCIDevice);
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if (xPCIDevice is PCIDeviceBridge) {
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EnumerateBus(((PCIDeviceBridge)xPCIDevice).SecondaryBus, ref rDevices);
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}
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if (xPCIDevice.IsMultiFunction) {
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xMaxFunctions = 8;
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}
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}
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}
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}
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}
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}
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[Flags]
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public enum PCICommand : short
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{
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IO = 0x1, /* Enable response in I/O space */
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Memort = 0x2, /* Enable response in Memory space */
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Master = 0x4, /* Enable bus mastering */
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Special = 0x8, /* Enable response to special cycles */
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Invalidate = 0x10, /* Use memory write and invalidate */
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VGA_Pallete = 0x20, /* Enable palette snooping */
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Parity = 0x40, /* Enable parity checking */
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Wait = 0x80, /* Enable address/data stepping */
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SERR = 0x100, /* Enable SERR */
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Fast_Back = 0x200, /* Enable back-to-back writes */
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}
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[Flags]
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public enum PCIStatus : int
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{
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CAP_LIST = 0x10, /* Support Capability List */
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SUPPORT_66MHZ = 0x20, /* Support 66 Mhz PCI 2.1 bus */
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UDF = 0x40, /* Support User Definable Features [obsolete] */
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FAST_BACK = 0x80, /* Accept fast-back to back */
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PARITY = 0x100, /* Detected parity error */
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DEVSEL_MASK = 0x600, /* DEVSEL timing */
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DEVSEL_FAST = 0x000,
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DEVSEL_MEDIUM = 0x200,
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DEVSEL_SLOW = 0x400,
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SIG_TARGET_ABORT = 0x800, /* Set on target abort */
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REC_TARGET_ABORT = 0x1000, /* Master ack of " */
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REC_MASTER_ABORT = 0x2000, /* Set on master abort */
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SIG_SYSTEM_ERROR = 0x4000, /* Set when we drive SERR */
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DETECTED_PARITY = 0x8000 /* Set on parity error */
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}
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public enum PCIHeaderType : byte
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{
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Normal = 0,
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Bridge = 1,
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Cardbus = 2
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}
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[Flags]
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public enum PCIBist : byte
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{
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CocdMask = 0x0f, /* Return result */
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Start = 0x40, /* 1 to start BIST, 2 secs or less */
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Capable = 0x80 /* 1 if BIST capable */
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}
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/// <summary>
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/// Class representing CardBus PCI Device device
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/// </summary>
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public class PCIDeviceCardBus : PCIDevice
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{
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public PCIDeviceCardBus(byte bus, byte slot, byte function)
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: base (bus,slot,function)
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{
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}
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public override int NumberOfBaseAddresses()
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{
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//get
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//{
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return 6;
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//}
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}
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}
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/// <summary>
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/// Class representing a PCI to PCI Bridge PCI Device
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/// </summary>
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public class PCIDeviceBridge : PCIDevice
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{
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public PCIDeviceBridge(byte bus, byte slot, byte function)
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: base (bus,slot,function)
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{
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}
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public override int NumberOfBaseAddresses()
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{
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// get
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// {
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return 2;
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////}
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}
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public byte PrimaryBus { get { return Read8(0x18); } set { Write8(0x18, value); } }
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public byte SecondaryBus { get { return Read8(0x19); } set { Write8(0x19, value); } }
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public byte SubordinateBus { get { return Read8(0x1a); } set { Write8(0x1a, value); } }
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public byte SecondaryLatencyTime { get { return Read8(0x1b); } set { Write8(0x1b, value); } }
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}
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/// <summary>
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/// Class representing a Normal PCI Device
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/// </summary>
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public class PCIDeviceNormal : PCIDevice
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{
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public PCIDeviceNormal(byte bus, byte slot, byte function)
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: base (bus,slot,function)
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{
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}
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public override int NumberOfBaseAddresses()
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{
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//get
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//{
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return 6;
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//}
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}
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[Obsolete("Use PciDevice.GetAddressSpace(2)")]
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public UInt32 BaseAddress2 { get { return Read32(0x18); } set { Write32(0x18, value); } }
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[Obsolete("Use PciDevice.GetAddressSpace(3)")]
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public UInt32 BaseAddress3 { get { return Read32(0x1a); } set { Write32(0x1a, value); } }
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[Obsolete("Use PciDevice.GetAddressSpace(4)")]
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public UInt32 BaseAddress4 { get { return Read32(0x20); } set { Write32(0x20, value); } }
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[Obsolete("Use PciDevice.GetAddressSpace(5)")]
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public UInt32 BaseAddress5 { get { return Read32(0x24); } set { Write32(0x24, value); } }
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}
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public abstract class PCIDevice
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{
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/// <summary>
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/// Gets the number of address spaces this device type has
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/// </summary>
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/// <returns></returns>
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public abstract int NumberOfBaseAddresses();
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//{
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// get;
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//}
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private static string[] classtext = new string[]
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{
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"pre pci 2.0", // 00
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"disk", // 01
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"network", // 02
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"display", // 03
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"multimedia", // 04
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"memory", // 05
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"bridge", // 06
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"communication", // 07
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"system peripheral",// 08
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"input", // 09
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"docking station", // 0A
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"CPU", // 0B
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"serial bus", // 0C
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};
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private static string[][] subclasstext = new string[][]
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{
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new string[] { "VGA Device", "non VGA device"},
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new string[] { "SCSI" ,"IDE" , "floppy","IPI","RAID", "other" },
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new string[] { "Ethernet", "TokenRing", "FDDI" , "ATM" , "other" },
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new string[] { "VGA", "SuperVGA","XGA", "other"},
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new string[] { "video" ,"audio", "other"},
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new string[] { "RAM", "Flash memory" , "other"},
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new string[] { "CPU/PCI" ,"PCI/ISA" , "PCI/EISA" , "PCI/MCA","PCI/PCI" , "PCI/PCMCIA", "PCI/NuBus", "PCI/CardBus", "other"},
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new string[] { "serial", "parallel", "other"},
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new string[] { "PIC", "DMAC" , "timer" ,"RTC", "other"},
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new string[] { "keyboard","digitizer","mouse", "other" },
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new string[] { "generic" , "other" },
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new string[] { "386", "486","Pentium" , "P6" ,"Alpha","coproc","other" },
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new string[] { "Firewire", "ACCESS.bus" , "SSA", "USB" ,"Fiber Channel" , "other"},
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};
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public string GetClassInfo()
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{
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int cc = ClassCode;
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int sc = SubClass;
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if (cc >= classtext.Length)
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return "unknown class (" + cc.ToString() + ") / subclass (" + sc.ToString() + ")";
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if (sc >= subclasstext[cc].Length)
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return String.Concat(classtext[cc], " / unknown subclass (", sc.ToString(), ")");
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return String.Concat( classtext[cc] , " / " , subclasstext[cc][sc]);
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}
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private const UInt32 PCI_BASE_ADDRESS_SPACE = 0x01; /* 0 = memory, 1 = I/O */
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private const UInt32 PCI_BASE_ADDRESS_SPACE_IO = 0x01;
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private const UInt32 PCI_BASE_ADDRESS_SPACE_MEMORY = 0x00;
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private const UInt32 PCI_BASE_ADDRESS_MEM_TYPE_MASK = 0x06;
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private const UInt32 PCI_BASE_ADDRESS_MEM_TYPE_32 = 0x00; /* 32 bit address */
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private const UInt32 PCI_BASE_ADDRESS_MEM_TYPE_1M = 0x02; /* Below 1M [obsolete] */
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private const UInt32 PCI_BASE_ADDRESS_MEM_TYPE_64 = 0x04; /* 64 bit address */
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private const UInt32 PCI_BASE_ADDRESS_MEM_PREFETCH = 0x08; /* prefetchable? */
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private const UInt32 PCI_BASE_ADDRESS_MEM_MASK = 0xfffffff0;
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private const UInt32 PCI_BASE_ADDRESS_IO_MASK = 0xfffffffc;
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protected PCIDevice(byte bus, byte slot, byte function)
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{
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this.Bus = bus;
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this.Slot = slot;
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this.Function = function;
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}
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private bool NeedsIO = false;
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private bool NeedsMemory = false;
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private bool _NeedsLayingout = true;
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/// <summary>
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/// Creates the AddressSpaces for this device.
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/// </summary>
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private void LayoutIO()
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{
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//Console.WriteLine("Checking AdressSpaces of PCI(" + Bus + ", " + Slot + ", " + Function + ")");
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IOMaps = new Kernel.AddressSpace[NumberOfBaseAddresses()];
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for (byte i = 0; i < NumberOfBaseAddresses(); i++)
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{
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UInt32 address = GetBaseAddressInternal(i);
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SetBaseAddressInternal(i, 0xffffffff);
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UInt32 flags = GetBaseAddressInternal(i);
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SetBaseAddressInternal(i, address);
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if (address == 0)
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{
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//Console.WriteLine("register " + i + " - none " + PCIBus.ToHex(flags,8));
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IOMaps[i] = null;
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}
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else if ((address & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_MEMORY)
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{
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UInt32 size = ~(PCI_BASE_ADDRESS_MEM_MASK & flags)+1;
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IOMaps[i] = new Kernel.MemoryAddressSpace(address, size);
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//Console.WriteLine("register " + i + " - " + size + "b mem");
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NeedsIO = true;
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}
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else if ((address & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO)
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{
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UInt32 size = ~(PCI_BASE_ADDRESS_IO_MASK & flags) +1;
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IOMaps[i] = new Kernel.IOAddressSpace(address, size);
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//Console.WriteLine("register " + i + " - " + size + "b io");
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NeedsMemory = true;
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}
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}
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_NeedsLayingout = false;
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}
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private Kernel.AddressSpace[] IOMaps;
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/// <summary>
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/// Gets the AddressSpace object assosiated with the device
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/// </summary>
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/// <param name="index">Address Space to return</param>
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/// <returns></returns>
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public Kernel.AddressSpace GetAddressSpace(byte index)
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{
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if (index < 0 || index >= NumberOfBaseAddresses())
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throw new ArgumentOutOfRangeException("index");
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if (_NeedsLayingout)
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LayoutIO();
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return IOMaps[index];
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}
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/// <summary>
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/// The bus the device is on
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/// </summary>
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public byte Bus { get; private set; }
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/// <summary>
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/// The slot the device is using
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/// </summary>
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public byte Slot { get; private set; }
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/// <summary>
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/// The function number of the device
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/// </summary>
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public byte Function { get; private set; }
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/// <summary>
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/// Is this an actual device?
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/// </summary>
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public bool DeviceExists { get { return VendorID != 0xFFFF && VendorID != 0x0; } }
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/// <summary>
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/// Is this a multifunction devie?
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/// </summary>
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public bool IsMultiFunction { get { return (Read8(0x0e) & 0xf0) != 0; } }
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/// <summary>
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/// The Vendor ID
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/// </summary>
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public UInt32 VendorID { get { return Read16(0x0); } }
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/// <summary>
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/// The Device ID
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/// </summary>
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public UInt16 DeviceID { get { return Read16(0x2); } }
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/// <summary>
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/// the command register of this PCI Device
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/// </summary>
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public PCICommand Command { get { return (PCICommand)Read16(0x4); } set { Write16(0x4, (ushort)value); } }
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/// <summary>
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/// The Status Register of this PCI Device
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/// </summary>
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public PCIStatus Status { get { return (PCIStatus)Read16(0x6); } set { Write16(0x6, (ushort)value); } }
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/// <summary>
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/// The Revision ID of this PCI Device
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/// </summary>
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public byte RevisionID { get { return Read8(0x8); } }
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/// <summary>
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/// The Programming Interface Number of this PCI Device
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/// </summary>
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public byte ProgIF { get { return Read8(0x9); } }
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/// <summary>
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/// The Sub class of this PCI Device
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/// </summary>
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public byte SubClass { get { return Read8(0xa); } }
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/// <summary>
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/// The Class of this PCI Device
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/// </summary>
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public byte ClassCode { get { return Read8(0xb); } }
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/// <summary>
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/// The Cache Line Size of this PCI Device
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/// </summary>
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public byte CacheLineSize { get { return Read8(0x0c); } set { Write8(0x0c, value); } }
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/// <summary>
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/// The Latency Timer of this PCI Device
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/// </summary>
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public byte LatencyTimer { get { return Read8(0x0d); } set { Write8(0x0d, value); } }
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/// <summary>
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/// The header type of this PCI Device
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/// </summary>
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public byte HeaderType { get { return (byte)(Read8(0x0e) & 0xf); } }
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/// <summary>
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/// The BIST Register of this PCI Device
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/// </summary>
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public PCIBist Bist { get { return (PCIBist)Read8(0x0f); } set { Write8(0x0f, (byte)value); } }
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[Obsolete("This function should be private. Use PciDevice.GetAddressSpace(index)")]
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public UInt32 GetBaseAddress(byte index)
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{
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return Read32((byte)(0x10 + index * 4));
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}
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public UInt32 GetBaseAddressInternal(byte index)
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{
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return Read32((byte)(0x10 + index * 4));
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}
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private void SetBaseAddressInternal(byte index, UInt32 value)
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{
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Write32((byte)(0x10 + index * 4), value);
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}
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[Obsolete("Use PciDevice.GetAddressSpace(0)")]
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public UInt32 BaseAddress0 { get { return Read32(0x10); } set { Write32(0x10, value); } }
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[Obsolete("Use PciDevice.GetAddressSpace(1)")]
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public UInt32 BaseAddress1 { get { return Read32(0x14); } set { Write32(0x14, value); } }
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public byte InterruptLine { get { return Read8(0x3c); } set { Write8(0x3c, value); } }
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public byte InterruptPin { get { return Read8(0x3d); } set { Write8(0x3d, value); } }
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public byte MinGNT { get { return Read8(0x3e); } set { Write8(0x3e, value); } }
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public byte MaxLAT { get { return Read8(0x3f); } set { Write8(0x3f, value); } }
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protected const ushort ConfigAddr = 0xCF8;
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protected const ushort ConfigData = 0xCFC;
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/// <summary>
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/// Disables the device
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/// </summary>
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public void DisableDevice()
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{
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Command = Command & (~PCICommand.IO & ~PCICommand.Master & PCICommand.Memort);
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}
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/// <summary>
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/// enables the device
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/// </summary>
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public void EnableDevice()
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{
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Command = Command & ((NeedsIO ? PCICommand.IO : 0) & PCICommand.Master & (NeedsMemory ? PCICommand.Memort : 0));
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}
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private UInt32 GetAddress(byte aRegister)
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{
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return (UInt32)(
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// Bits 23-16
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((UInt32)Bus << 16)
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// Bits 15-11
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| (((UInt32)Slot & 0x1F) << 11)
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// Bits 10-8
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| (((UInt32)Function & 0x07) << 8)
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// Bits 7-0
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| ((UInt32)aRegister & 0xFF)
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// Enable bit - must be set
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| 0x80000000);
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}
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protected UInt32 Read32(byte aRegister)
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{
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Kernel.CPUBus.Write32(ConfigAddr, GetAddress(aRegister));
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return Kernel.CPUBus.Read32(ConfigData);
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}
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protected UInt16 Read16(byte aRegister)
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{
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Kernel.CPUBus.Write32(ConfigAddr, GetAddress(aRegister));
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return Kernel.CPUBus.Read16(ConfigData);
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}
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protected byte Read8(byte aRegister)
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{
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Kernel.CPUBus.Write32(ConfigAddr, GetAddress(aRegister));
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return Kernel.CPUBus.Read8(ConfigData);
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}
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protected void Write32(byte aRegister, UInt32 value)
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{
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Kernel.CPUBus.Write32(ConfigAddr, GetAddress(aRegister));
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Kernel.CPUBus.Write32(ConfigData, value);
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}
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|
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protected void Write16(byte aRegister, UInt16 value)
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|
{
|
|
Kernel.CPUBus.Write32(ConfigAddr, GetAddress(aRegister));
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|
Kernel.CPUBus.Write16(ConfigData, value);
|
|
}
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|
|
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protected void Write8(byte aRegister, byte value)
|
|
{
|
|
Kernel.CPUBus.Write32(ConfigAddr, GetAddress(aRegister));
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|
Kernel.CPUBus.Write8(ConfigData, value);
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|
}
|
|
}
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|
} |