]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/alpha/kernel/irq_srm.c
2 * Handle interrupts from the SRM, assuming no additional weirdness.
5 #include <linux/init.h>
6 #include <linux/sched.h>
14 * Is the palcode SMP safe? In other words: can we call cserve_ena/dis
15 * at the same time in multiple CPUs? To be safe I added a spinlock
16 * but it can be removed trivially if the palcode is robust against smp.
18 DEFINE_SPINLOCK(srm_irq_lock
);
21 srm_enable_irq(struct irq_data
*d
)
23 spin_lock(&srm_irq_lock
);
24 cserve_ena(d
->irq
- 16);
25 spin_unlock(&srm_irq_lock
);
29 srm_disable_irq(struct irq_data
*d
)
31 spin_lock(&srm_irq_lock
);
32 cserve_dis(d
->irq
- 16);
33 spin_unlock(&srm_irq_lock
);
36 /* Handle interrupts from the SRM, assuming no additional weirdness. */
37 static struct irq_chip srm_irq_type
= {
39 .irq_unmask
= srm_enable_irq
,
40 .irq_mask
= srm_disable_irq
,
41 .irq_mask_ack
= srm_disable_irq
,
45 init_srm_irqs(long max
, unsigned long ignore_mask
)
51 for (i
= 16; i
< max
; ++i
) {
52 if (i
< 64 && ((ignore_mask
>> i
) & 1))
54 irq_set_chip_and_handler(i
, &srm_irq_type
, handle_level_irq
);
55 irq_set_status_flags(i
, IRQ_LEVEL
);
60 srm_device_interrupt(unsigned long vector
)
62 int irq
= (vector
- 0x800) >> 4;