public void ShouldFindProperty()
{
var fdt = new FlattenedDeviceTree(File.ReadAllBytes(Utilities.GetBinaryLocation("xilinx_zynq_iic.dtb")));
var model = fdt.Root.Properties.First(x => x.Name == "model").GetDataAsString();
Assert.AreEqual("Enclustra MARS ZX3", model);
}
public void ShouldFindAllNodes()
{
var expectedNodeNames = new [] {
"memory",
"chosen",
"soc",
"amba@0",
"intc@f8f01000",
"pl310@f8f02000",
"uart@e0001000",
"timer@0xf8001000",
"swdt@f8005000",
"eth@e000b000",
"phy@3",
"slcr@f8000000",
"i2c@e0004000",
"touch@38",
"usb@e0002000",
"devcfg@f8007000",
"tft@6C000000"
};
var fdt = new FlattenedDeviceTree(File.ReadAllBytes(Utilities.GetBinaryLocation("xilinx_zynq_iic.dtb")));
var descendants = fdt.Root.Descendants;
CollectionAssert.AreEquivalent(expectedNodeNames, descendants.Select(x => x.Name));
}
public void ShouldReadHeader()
{
var fdt = new FlattenedDeviceTree(File.ReadAllBytes(Utilities.GetBinaryLocation("xilinx_zynq_iic.dtb")));
Assert.AreEqual(17, fdt.Version);
Assert.AreEqual(16, fdt.LastCompatibleVersion);
}
public void ShouldRewriteProperTree()
{
var originalBlob = File.ReadAllBytes(Utilities.GetBinaryLocation("xilinx_zynq_iic.dtb"));
var fdt = new FlattenedDeviceTree(originalBlob);
var result = fdt.GetBinaryBlob();
CollectionAssert.AreEqual(originalBlob, result);
}
public static void LoadFdt(this SystemBus sysbus, string file, long address, string bootargs = null, bool append = true, string excludedNodes="")
{
var fdtBlob = File.ReadAllBytes(file);
if(bootargs == null)
{
sysbus.WriteBytes(fdtBlob, address, true);
return;
}
var fdt = new FlattenedDeviceTree(fdtBlob);
var chosenNode = fdt.Root.Subnodes.FirstOrDefault(x => x.Name == "chosen");
if(chosenNode == null)
{
chosenNode = new TreeNode { Name = "chosen" };
fdt.Root.Subnodes.Add(chosenNode);
}
var bootargsProperty = chosenNode.Properties.FirstOrDefault(x => x.Name == "bootargs");
if(bootargsProperty == null)
{
bootargsProperty = new Property("bootargs", new byte[] { 0 });
chosenNode.Properties.Add(bootargsProperty);
}
var oldBootargs = bootargsProperty.GetDataAsString();
if(append)
{
bootargs = oldBootargs + bootargs;
}
if(oldBootargs != bootargs)
{
sysbus.DebugLog("Bootargs altered from '{0}' to '{1}'.", oldBootargs, bootargs);
}
bootargsProperty.PutDataAsString(bootargs);
var excludedNodeNames = excludedNodes.Split(new [] {' '}, StringSplitOptions.RemoveEmptyEntries);
byte[] disabledValue = Encoding.ASCII.GetBytes ("disabled");
foreach(var deviceName in excludedNodeNames)
{
TreeNode node = fdt.Root.Descendants.FirstOrDefault(x => x.Name == deviceName);
if(node == null)
{
throw new RecoverableException(String.Format("Device {0} not found.", deviceName));
}
else
{
Property statusProperty = node.Properties.FirstOrDefault (x => x.Name == "status");
if (statusProperty != null) {
node.Properties.Remove (statusProperty);
}
statusProperty = new Property ("status", disabledValue);
node.Properties.Add (statusProperty);
}
}
fdtBlob = fdt.GetBinaryBlob();
sysbus.WriteBytes(fdtBlob, address, true);
}
public static void LoadFdt(this SystemBus sysbus, string file, long address, string bootargs = null, bool append = true, string excludedNodes = "")
{
var fdtBlob = File.ReadAllBytes(file);
if (bootargs == null)
{
sysbus.WriteBytes(fdtBlob, address, true);
return;
}
var fdt = new FlattenedDeviceTree(fdtBlob);
var chosenNode = fdt.Root.Subnodes.FirstOrDefault(x => x.Name == "chosen");
if (chosenNode == null)
{
chosenNode = new TreeNode {
Name = "chosen"
};
fdt.Root.Subnodes.Add(chosenNode);
}
var bootargsProperty = chosenNode.Properties.FirstOrDefault(x => x.Name == "bootargs");
if (bootargsProperty == null)
{
bootargsProperty = new Property("bootargs", new byte[] { 0 });
chosenNode.Properties.Add(bootargsProperty);
}
var oldBootargs = bootargsProperty.GetDataAsString();
if (append)
{
bootargs = oldBootargs + bootargs;
}
if (oldBootargs != bootargs)
{
sysbus.DebugLog("Bootargs altered from '{0}' to '{1}'.", oldBootargs, bootargs);
}
bootargsProperty.PutDataAsString(bootargs);
var excludedNodeNames = excludedNodes.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
byte[] disabledValue = Encoding.ASCII.GetBytes("disabled");
foreach (var deviceName in excludedNodeNames)
{
TreeNode node = fdt.Root.Descendants.FirstOrDefault(x => x.Name == deviceName);
if (node == null)
{
throw new RecoverableException(String.Format("Device {0} not found.", deviceName));
}
else
{
Property statusProperty = node.Properties.FirstOrDefault(x => x.Name == "status");
if (statusProperty != null)
{
node.Properties.Remove(statusProperty);
}
statusProperty = new Property("status", disabledValue);
node.Properties.Add(statusProperty);
}
}
fdtBlob = fdt.GetBinaryBlob();
sysbus.WriteBytes(fdtBlob, address, true);
}
public void ShouldReadReservationBlocks()
{
var fdt = new FlattenedDeviceTree(File.ReadAllBytes(Utilities.GetBinaryLocation("xilinx_zynq_iic.dtb")));
Assert.AreEqual(0, fdt.ReservationBlocks.Count);
}
