static void end_piix4_master_irq(unsigned int irq)
{
unsigned long flags;
spin_lock_irqsave(&cobalt_lock, flags);
enable_cobalt_irq(irq);
spin_unlock_irqrestore(&cobalt_lock, flags);
}
static void end_piix4_master_irq(struct irq_data *data)
{
unsigned long flags;
spin_lock_irqsave(&cobalt_lock, flags);
enable_cobalt_irq(data);
spin_unlock_irqrestore(&cobalt_lock, flags);
}
static void end_cobalt_irq(unsigned int irq)
{
unsigned long flags;
spin_lock_irqsave(&cobalt_lock, flags);
if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
enable_cobalt_irq(irq);
spin_unlock_irqrestore(&cobalt_lock, flags);
}
/*
* "irq" really just serves to identify the device. Here is where we
* map this to the Cobalt APIC entry where it's physically wired.
* This is called via request_irq -> setup_irq -> irq_desc->startup()
*/
static unsigned int startup_cobalt_irq(unsigned int irq)
{
unsigned long flags;
spin_lock_irqsave(&cobalt_lock, flags);
if ((irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING)))
irq_desc[irq].status &= ~(IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING);
enable_cobalt_irq(irq);
spin_unlock_irqrestore(&cobalt_lock, flags);
return 0;
}
/*
* This is the PIIX4-based 8259 that is wired up indirectly to Cobalt
* -- not the manner expected by the code in i8259.c.
*
* there is a 'master' physical interrupt source that gets sent to
* the CPU. But in the chipset there are various 'virtual' interrupts
* waiting to be handled. We represent this to Linux through a 'master'
* interrupt controller type, and through a special virtual interrupt-
* controller. Device drivers only see the virtual interrupt sources.
*/
static unsigned int startup_piix4_master_irq(struct irq_data *data)
{
legacy_pic->init(0);
enable_cobalt_irq(data);
}
