public RPCResult <GlobalSystemInterrupt> GetInterruptLine(int gsi_num)
{
if (gsi_num < gsibase || gsi_num >= gsibase + 24)
{
return new RPCResult <GlobalSystemInterrupt> {
Result = null
}
}
;
int ioapic_idx = gsi_num - (int)gsibase;
if (gsis[ioapic_idx] == null)
{
return new RPCResult <GlobalSystemInterrupt> {
Result = null
}
}
;
else
{
IOAPICGSI ret = gsis[ioapic_idx];
gsis[ioapic_idx] = null;
return(ret);
}
}
}
public override bool InitServer()
{
System.Diagnostics.Debugger.Log(0, "ioapic", "IOAPIC driver started");
/* Parse properties looking for resources */
foreach (var prop in props)
{
if (prop.Name == "pmem")
{
p_conf = prop.Value as tysos.PhysicalMemoryResource64;
}
else if (prop.Name == "vmem")
{
v_conf = prop.Value as tysos.VirtualMemoryResource64;
}
else if (prop.Name == "gsibase")
{
gsibase = (uint)prop.Value;
}
else if (prop.Name == "ioapicid")
{
id = (uint)prop.Value;
}
else if (prop.Name == "interrupts")
{
ints.AddRange(prop.Value as IEnumerable <tysos.Resources.InterruptLine>);
}
}
if (p_conf == null)
{
System.Diagnostics.Debugger.Log(0, "ioapic", "no physical memory provided");
return(false);
}
if (v_conf == null)
{
System.Diagnostics.Debugger.Log(0, "ioapic", "no virtual memory provided");
return(false);
}
/* Map our configuration space */
p_conf.Map(v_conf);
/* Get number of pins */
uint ioapicver = ReadRegister(0x1);
redirs = ((ioapicver >> 16) & 0xffU) + 1;
System.Diagnostics.Debugger.Log(0, "ioapic", "Configuration: p_conf: " + p_conf.Addr64.ToString("X8") +
", v_conf: " + v_conf.Addr64.ToString("X16") + ", gsibase: " + gsibase.ToString() +
", ioapicid: " + id.ToString() + ", redirs: " + redirs.ToString());
/* Build a list of free GSIs. The standard IOAPIC has 24 pins. */
for (uint i = 0; i < redirs; i++)
{
IOAPICGSI gsi = new IOAPICGSI();
gsi.apic = this;
gsi.gsi_num = (int)(gsibase + i);
gsi.ioapic_idx = (int)i;
gsis[i] = gsi;
}
return(true);
}