- unsigned int mask = 1 << (irq - PCIMT_IRQ_INT2);
- unsigned long flags;
-
- spin_lock_irqsave(&pciasic_lock, flags);
- *(volatile u8 *) PCIMT_IRQSEL |= mask;
- spin_unlock_irqrestore(&pciasic_lock, flags);
-}
-
-static unsigned int startup_pciasic_irq(unsigned int irq)
-{
- enable_pciasic_irq(irq);
- return 0; /* never anything pending */
-}
-
-#define shutdown_pciasic_irq disable_pciasic_irq
-
-void disable_pciasic_irq(unsigned int irq)
-{
- unsigned int mask = ~(1 << (irq - PCIMT_IRQ_INT2));
- unsigned long flags;
-
- spin_lock_irqsave(&pciasic_lock, flags);
- *(volatile u8 *) PCIMT_IRQSEL &= mask;
- spin_unlock_irqrestore(&pciasic_lock, flags);
-}
-
-#define mask_and_ack_pciasic_irq disable_pciasic_irq
-
-static void end_pciasic_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
- enable_pciasic_irq(irq);
-}
-
-static struct irq_chip pciasic_irq_type = {
- .typename = "ASIC-PCI",
- .startup = startup_pciasic_irq,
- .shutdown = shutdown_pciasic_irq,
- .enable = enable_pciasic_irq,
- .disable = disable_pciasic_irq,
- .ack = mask_and_ack_pciasic_irq,
- .end = end_pciasic_irq,
-};
-
-/*
- * hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug
- * button interrupts. Later ...
- */
-static void pciasic_hwint0(struct pt_regs *regs)
-{
- panic("Received int0 but no handler yet ...");
-}
-
-/* This interrupt was used for the com1 console on the first prototypes. */
-static void pciasic_hwint2(struct pt_regs *regs)
-{
- /* I think this shouldn't happen on production machines. */
- panic("hwint2 and no handler yet");
-}
-
-/* hwint5 is the r4k count / compare interrupt */
-static void pciasic_hwint5(struct pt_regs *regs)
-{
- panic("hwint5 and no handler yet");
-}
-
-static unsigned int ls1bit8(unsigned int x)
-{
- int b = 7, s;
-
- s = 4; if ((x & 0x0f) == 0) s = 0; b -= s; x <<= s;
- s = 2; if ((x & 0x30) == 0) s = 0; b -= s; x <<= s;
- s = 1; if ((x & 0x40) == 0) s = 0; b -= s;
-
- return b;