/// <summary>
/// Creates an IRQ redirection entry
/// </summary>
/// <param name="pin">The IO Apic pin</param>
/// <param name="interrupt">The interrupt vector associated with the pin</param>
/// <param name="flags">Extra flags</param>
public static void CreateEntry(uint pin, uint interrupt, ulong flags)
{
IOApic IOApic = GetIOApicFor(pin);
if (IOApic == null)
{
Console.Write("[IOAPIC] No IO Apic was found responsible for pin ");
Console.WriteNum((int)pin);
Console.Write('\n');
return;
}
IOApic.CreateRedirection(pin - IOApic.GlobalSystemInterruptBase, 32 + interrupt, flags);
}
/// <summary>
/// Creates an ISA IRQ redirection entry
/// </summary>
/// <param name="src">The source interrupt</param>
/// <param name="dst">The destination interrupt</param>
public static void CreateISARedirection(uint src, uint dst)
{
Acpi.ISAOverride irq = Acpi.GetISARedirection(src);
// Polarity and Trigger
ulong flags = 0;
if (irq.Polarity == 0 || irq.Polarity == 3)
{
flags |= IOApic.IOAPIC_REDIR_POLARITY_LOW;
}
else
{
flags |= IOApic.IOAPIC_REDIR_POLARITY_HIGH;
}
if (irq.Trigger == 0 || irq.Trigger == 1)
{
flags |= IOApic.IOAPIC_REDIR_TRIGGER_EDGE;
}
else
{
flags |= IOApic.IOAPIC_REDIR_TRIGGER_LEVEL;
}
// No override?
uint irqNum = (irq.GSI == 0) ? src : dst;
IOApic responsible = GetIOApicFor(irqNum);
if (responsible == null)
{
Console.Write("[IOAPIC] No IO Apic was found responsible for pin ");
Console.WriteNum((int)src);
Console.Write("->");
Console.WriteNum((int)dst);
Console.Write('\n');
return;
}
responsible.CreateRedirection(irqNum - responsible.GlobalSystemInterruptBase, 32 + dst, flags);
}