2 * Derived from arch/i386/kernel/irq.c
3 * Copyright (C) 1992 Linus Torvalds
4 * Adapted from arch/i386 by Gary Thomas
5 * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
6 * Updated and modified by Cort Dougan <cort@fsmlabs.com>
7 * Copyright (C) 1996-2001 Cort Dougan
8 * Adapted for Power Macintosh by Paul Mackerras
9 * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au)
10 * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
17 * This file contains the code used by various IRQ handling routines:
18 * asking for different IRQ's should be done through these routines
19 * instead of just grabbing them. Thus setups with different IRQ numbers
20 * shouldn't result in any weird surprises, and installing new handlers
23 * The MPC8xx has an interrupt mask in the SIU. If a bit is set, the
24 * interrupt is _enabled_. As expected, IRQ0 is bit 0 in the 32-bit
25 * mask register (of which only 16 are defined), hence the weird shifting
26 * and complement of the cached_irq_mask. I want to be able to stuff
27 * this right into the SIU SMASK register.
28 * Many of the prep/chrp functions are conditional compiled on CONFIG_8xx
29 * to reduce code space and undefined function references.
34 #include <linux/module.h>
35 #include <linux/threads.h>
36 #include <linux/kernel_stat.h>
37 #include <linux/signal.h>
38 #include <linux/sched.h>
39 #include <linux/ptrace.h>
40 #include <linux/ioport.h>
41 #include <linux/interrupt.h>
42 #include <linux/timex.h>
43 #include <linux/init.h>
44 #include <linux/slab.h>
45 #include <linux/delay.h>
46 #include <linux/irq.h>
47 #include <linux/seq_file.h>
48 #include <linux/cpumask.h>
49 #include <linux/profile.h>
50 #include <linux/bitops.h>
51 #include <linux/list.h>
52 #include <linux/radix-tree.h>
53 #include <linux/mutex.h>
54 #include <linux/bootmem.h>
55 #include <linux/pci.h>
57 #include <asm/uaccess.h>
58 #include <asm/system.h>
60 #include <asm/pgtable.h>
62 #include <asm/cache.h>
64 #include <asm/ptrace.h>
65 #include <asm/machdep.h>
67 #ifdef CONFIG_PPC_ISERIES
71 int __irq_offset_value
;
72 static int ppc_spurious_interrupts
;
75 EXPORT_SYMBOL(__irq_offset_value
);
76 atomic_t ppc_n_lost_interrupts
;
78 #ifndef CONFIG_PPC_MERGE
79 #define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
80 unsigned long ppc_cached_irq_mask
[NR_MASK_WORDS
];
84 extern int tau_initialized
;
85 extern int tau_interrupts(int);
87 #endif /* CONFIG_PPC32 */
89 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
90 extern atomic_t ipi_recv
;
91 extern atomic_t ipi_sent
;
95 EXPORT_SYMBOL(irq_desc
);
97 int distribute_irqs
= 1;
98 #endif /* CONFIG_PPC64 */
100 int show_interrupts(struct seq_file
*p
, void *v
)
102 int i
= *(loff_t
*)v
, j
;
103 struct irqaction
*action
;
109 for_each_online_cpu(j
)
110 seq_printf(p
, "CPU%d ", j
);
115 desc
= get_irq_desc(i
);
116 spin_lock_irqsave(&desc
->lock
, flags
);
117 action
= desc
->action
;
118 if (!action
|| !action
->handler
)
120 seq_printf(p
, "%3d: ", i
);
122 for_each_online_cpu(j
)
123 seq_printf(p
, "%10u ", kstat_cpu(j
).irqs
[i
]);
125 seq_printf(p
, "%10u ", kstat_irqs(i
));
126 #endif /* CONFIG_SMP */
128 seq_printf(p
, " %s ", desc
->chip
->typename
);
130 seq_puts(p
, " None ");
131 seq_printf(p
, "%s", (desc
->status
& IRQ_LEVEL
) ? "Level " : "Edge ");
132 seq_printf(p
, " %s", action
->name
);
133 for (action
= action
->next
; action
; action
= action
->next
)
134 seq_printf(p
, ", %s", action
->name
);
137 spin_unlock_irqrestore(&desc
->lock
, flags
);
138 } else if (i
== NR_IRQS
) {
140 #ifdef CONFIG_TAU_INT
141 if (tau_initialized
){
142 seq_puts(p
, "TAU: ");
143 for_each_online_cpu(j
)
144 seq_printf(p
, "%10u ", tau_interrupts(j
));
145 seq_puts(p
, " PowerPC Thermal Assist (cpu temp)\n");
148 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
149 /* should this be per processor send/receive? */
150 seq_printf(p
, "IPI (recv/sent): %10u/%u\n",
151 atomic_read(&ipi_recv
), atomic_read(&ipi_sent
));
153 #endif /* CONFIG_PPC32 */
154 seq_printf(p
, "BAD: %10u\n", ppc_spurious_interrupts
);
159 #ifdef CONFIG_HOTPLUG_CPU
160 void fixup_irqs(cpumask_t map
)
168 if (irq_desc
[irq
].status
& IRQ_PER_CPU
)
171 cpus_and(mask
, irq_desc
[irq
].affinity
, map
);
172 if (any_online_cpu(mask
) == NR_CPUS
) {
173 printk("Breaking affinity for irq %i\n", irq
);
176 if (irq_desc
[irq
].chip
->set_affinity
)
177 irq_desc
[irq
].chip
->set_affinity(irq
, mask
);
178 else if (irq_desc
[irq
].action
&& !(warned
++))
179 printk("Cannot set affinity for irq %i\n", irq
);
188 void do_IRQ(struct pt_regs
*regs
)
191 #ifdef CONFIG_IRQSTACKS
192 struct thread_info
*curtp
, *irqtp
;
197 #ifdef CONFIG_DEBUG_STACKOVERFLOW
198 /* Debugging check for stack overflow: is there less than 2KB free? */
202 sp
= __get_SP() & (THREAD_SIZE
-1);
204 if (unlikely(sp
< (sizeof(struct thread_info
) + 2048))) {
205 printk("do_IRQ: stack overflow: %ld\n",
206 sp
- sizeof(struct thread_info
));
213 * Every platform is required to implement ppc_md.get_irq.
214 * This function will either return an irq number or -1 to
215 * indicate there are no more pending.
216 * The value -2 is for buggy hardware and means that this IRQ
217 * has already been handled. -- Tom
219 irq
= ppc_md
.get_irq(regs
);
221 if (irq
!= NO_IRQ
&& irq
!= NO_IRQ_IGNORE
) {
222 #ifdef CONFIG_IRQSTACKS
223 /* Switch to the irq stack to handle this */
224 curtp
= current_thread_info();
225 irqtp
= hardirq_ctx
[smp_processor_id()];
226 if (curtp
!= irqtp
) {
227 struct irq_desc
*desc
= irq_desc
+ irq
;
228 void *handler
= desc
->handle_irq
;
231 irqtp
->task
= curtp
->task
;
233 call_handle_irq(irq
, desc
, regs
, irqtp
, handler
);
236 set_bits(irqtp
->flags
, &curtp
->flags
);
239 generic_handle_irq(irq
, regs
);
240 } else if (irq
!= NO_IRQ_IGNORE
)
241 /* That's not SMP safe ... but who cares ? */
242 ppc_spurious_interrupts
++;
246 #ifdef CONFIG_PPC_ISERIES
247 if (get_lppaca()->int_dword
.fields
.decr_int
) {
248 get_lppaca()->int_dword
.fields
.decr_int
= 0;
249 /* Signal a fake decrementer interrupt */
250 timer_interrupt(regs
);
255 void __init
init_IRQ(void)
264 #ifdef CONFIG_IRQSTACKS
265 struct thread_info
*softirq_ctx
[NR_CPUS
] __read_mostly
;
266 struct thread_info
*hardirq_ctx
[NR_CPUS
] __read_mostly
;
268 void irq_ctx_init(void)
270 struct thread_info
*tp
;
273 for_each_possible_cpu(i
) {
274 memset((void *)softirq_ctx
[i
], 0, THREAD_SIZE
);
277 tp
->preempt_count
= SOFTIRQ_OFFSET
;
279 memset((void *)hardirq_ctx
[i
], 0, THREAD_SIZE
);
282 tp
->preempt_count
= HARDIRQ_OFFSET
;
286 static inline void do_softirq_onstack(void)
288 struct thread_info
*curtp
, *irqtp
;
290 curtp
= current_thread_info();
291 irqtp
= softirq_ctx
[smp_processor_id()];
292 irqtp
->task
= curtp
->task
;
293 call_do_softirq(irqtp
);
298 #define do_softirq_onstack() __do_softirq()
299 #endif /* CONFIG_IRQSTACKS */
301 void do_softirq(void)
308 local_irq_save(flags
);
310 if (local_softirq_pending())
311 do_softirq_onstack();
313 local_irq_restore(flags
);
315 EXPORT_SYMBOL(do_softirq
);
319 * IRQ controller and virtual interrupts
322 #ifdef CONFIG_PPC_MERGE
324 static LIST_HEAD(irq_hosts
);
325 static spinlock_t irq_big_lock
= SPIN_LOCK_UNLOCKED
;
327 struct irq_map_entry irq_map
[NR_IRQS
];
328 static unsigned int irq_virq_count
= NR_IRQS
;
329 static struct irq_host
*irq_default_host
;
331 struct irq_host
*irq_alloc_host(unsigned int revmap_type
,
332 unsigned int revmap_arg
,
333 struct irq_host_ops
*ops
,
334 irq_hw_number_t inval_irq
)
336 struct irq_host
*host
;
337 unsigned int size
= sizeof(struct irq_host
);
342 /* Allocate structure and revmap table if using linear mapping */
343 if (revmap_type
== IRQ_HOST_MAP_LINEAR
)
344 size
+= revmap_arg
* sizeof(unsigned int);
346 host
= kzalloc(size
, GFP_KERNEL
);
348 host
= alloc_bootmem(size
);
350 memset(host
, 0, size
);
356 host
->revmap_type
= revmap_type
;
357 host
->inval_irq
= inval_irq
;
360 spin_lock_irqsave(&irq_big_lock
, flags
);
362 /* If it's a legacy controller, check for duplicates and
363 * mark it as allocated (we use irq 0 host pointer for that
365 if (revmap_type
== IRQ_HOST_MAP_LEGACY
) {
366 if (irq_map
[0].host
!= NULL
) {
367 spin_unlock_irqrestore(&irq_big_lock
, flags
);
368 /* If we are early boot, we can't free the structure,
370 * this will be fixed once slab is made available early
371 * instead of the current cruft
377 irq_map
[0].host
= host
;
380 list_add(&host
->link
, &irq_hosts
);
381 spin_unlock_irqrestore(&irq_big_lock
, flags
);
383 /* Additional setups per revmap type */
384 switch(revmap_type
) {
385 case IRQ_HOST_MAP_LEGACY
:
386 /* 0 is always the invalid number for legacy */
388 /* setup us as the host for all legacy interrupts */
389 for (i
= 1; i
< NUM_ISA_INTERRUPTS
; i
++) {
390 irq_map
[i
].hwirq
= 0;
392 irq_map
[i
].host
= host
;
395 /* Clear norequest flags */
396 get_irq_desc(i
)->status
&= ~IRQ_NOREQUEST
;
398 /* Legacy flags are left to default at this point,
399 * one can then use irq_create_mapping() to
400 * explicitely change them
402 ops
->map(host
, i
, i
);
405 case IRQ_HOST_MAP_LINEAR
:
406 rmap
= (unsigned int *)(host
+ 1);
407 for (i
= 0; i
< revmap_arg
; i
++)
409 host
->revmap_data
.linear
.size
= revmap_arg
;
411 host
->revmap_data
.linear
.revmap
= rmap
;
417 pr_debug("irq: Allocated host of type %d @0x%p\n", revmap_type
, host
);
422 struct irq_host
*irq_find_host(struct device_node
*node
)
424 struct irq_host
*h
, *found
= NULL
;
427 /* We might want to match the legacy controller last since
428 * it might potentially be set to match all interrupts in
429 * the absence of a device node. This isn't a problem so far
432 spin_lock_irqsave(&irq_big_lock
, flags
);
433 list_for_each_entry(h
, &irq_hosts
, link
)
434 if (h
->ops
->match
== NULL
|| h
->ops
->match(h
, node
)) {
438 spin_unlock_irqrestore(&irq_big_lock
, flags
);
441 EXPORT_SYMBOL_GPL(irq_find_host
);
443 void irq_set_default_host(struct irq_host
*host
)
445 pr_debug("irq: Default host set to @0x%p\n", host
);
447 irq_default_host
= host
;
450 void irq_set_virq_count(unsigned int count
)
452 pr_debug("irq: Trying to set virq count to %d\n", count
);
454 BUG_ON(count
< NUM_ISA_INTERRUPTS
);
456 irq_virq_count
= count
;
459 unsigned int irq_create_mapping(struct irq_host
*host
,
460 irq_hw_number_t hwirq
)
462 unsigned int virq
, hint
;
464 pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host
, hwirq
);
466 /* Look for default host if nececssary */
468 host
= irq_default_host
;
470 printk(KERN_WARNING
"irq_create_mapping called for"
471 " NULL host, hwirq=%lx\n", hwirq
);
475 pr_debug("irq: -> using host @%p\n", host
);
477 /* Check if mapping already exist, if it does, call
478 * host->ops->map() to update the flags
480 virq
= irq_find_mapping(host
, hwirq
);
481 if (virq
!= IRQ_NONE
) {
482 pr_debug("irq: -> existing mapping on virq %d\n", virq
);
486 /* Get a virtual interrupt number */
487 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
) {
489 virq
= (unsigned int)hwirq
;
490 if (virq
== 0 || virq
>= NUM_ISA_INTERRUPTS
)
494 /* Allocate a virtual interrupt number */
495 hint
= hwirq
% irq_virq_count
;
496 virq
= irq_alloc_virt(host
, 1, hint
);
497 if (virq
== NO_IRQ
) {
498 pr_debug("irq: -> virq allocation failed\n");
502 pr_debug("irq: -> obtained virq %d\n", virq
);
504 /* Clear IRQ_NOREQUEST flag */
505 get_irq_desc(virq
)->status
&= ~IRQ_NOREQUEST
;
509 irq_map
[virq
].hwirq
= hwirq
;
511 if (host
->ops
->map(host
, virq
, hwirq
)) {
512 pr_debug("irq: -> mapping failed, freeing\n");
513 irq_free_virt(virq
, 1);
518 EXPORT_SYMBOL_GPL(irq_create_mapping
);
520 extern unsigned int irq_create_of_mapping(struct device_node
*controller
,
521 u32
*intspec
, unsigned int intsize
)
523 struct irq_host
*host
;
524 irq_hw_number_t hwirq
;
525 unsigned int type
= IRQ_TYPE_NONE
;
528 if (controller
== NULL
)
529 host
= irq_default_host
;
531 host
= irq_find_host(controller
);
533 printk(KERN_WARNING
"irq: no irq host found for %s !\n",
534 controller
->full_name
);
538 /* If host has no translation, then we assume interrupt line */
539 if (host
->ops
->xlate
== NULL
)
542 if (host
->ops
->xlate(host
, controller
, intspec
, intsize
,
548 virq
= irq_create_mapping(host
, hwirq
);
552 /* Set type if specified and different than the current one */
553 if (type
!= IRQ_TYPE_NONE
&&
554 type
!= (get_irq_desc(virq
)->status
& IRQF_TRIGGER_MASK
))
555 set_irq_type(virq
, type
);
558 EXPORT_SYMBOL_GPL(irq_create_of_mapping
);
560 unsigned int irq_of_parse_and_map(struct device_node
*dev
, int index
)
564 if (of_irq_map_one(dev
, index
, &oirq
))
567 return irq_create_of_mapping(oirq
.controller
, oirq
.specifier
,
570 EXPORT_SYMBOL_GPL(irq_of_parse_and_map
);
572 void irq_dispose_mapping(unsigned int virq
)
574 struct irq_host
*host
= irq_map
[virq
].host
;
575 irq_hw_number_t hwirq
;
578 WARN_ON (host
== NULL
);
582 /* Never unmap legacy interrupts */
583 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
)
586 /* remove chip and handler */
587 set_irq_chip_and_handler(virq
, NULL
, NULL
);
589 /* Make sure it's completed */
590 synchronize_irq(virq
);
592 /* Tell the PIC about it */
593 if (host
->ops
->unmap
)
594 host
->ops
->unmap(host
, virq
);
597 /* Clear reverse map */
598 hwirq
= irq_map
[virq
].hwirq
;
599 switch(host
->revmap_type
) {
600 case IRQ_HOST_MAP_LINEAR
:
601 if (hwirq
< host
->revmap_data
.linear
.size
)
602 host
->revmap_data
.linear
.revmap
[hwirq
] = IRQ_NONE
;
604 case IRQ_HOST_MAP_TREE
:
605 /* Check if radix tree allocated yet */
606 if (host
->revmap_data
.tree
.gfp_mask
== 0)
608 /* XXX radix tree not safe ! remove lock whem it becomes safe
609 * and use some RCU sync to make sure everything is ok before we
610 * can re-use that map entry
612 spin_lock_irqsave(&irq_big_lock
, flags
);
613 radix_tree_delete(&host
->revmap_data
.tree
, hwirq
);
614 spin_unlock_irqrestore(&irq_big_lock
, flags
);
620 irq_map
[virq
].hwirq
= host
->inval_irq
;
623 get_irq_desc(virq
)->status
|= IRQ_NOREQUEST
;
626 irq_free_virt(virq
, 1);
628 EXPORT_SYMBOL_GPL(irq_dispose_mapping
);
630 unsigned int irq_find_mapping(struct irq_host
*host
,
631 irq_hw_number_t hwirq
)
634 unsigned int hint
= hwirq
% irq_virq_count
;
636 /* Look for default host if nececssary */
638 host
= irq_default_host
;
642 /* legacy -> bail early */
643 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
)
646 /* Slow path does a linear search of the map */
647 if (hint
< NUM_ISA_INTERRUPTS
)
648 hint
= NUM_ISA_INTERRUPTS
;
651 if (irq_map
[i
].host
== host
&&
652 irq_map
[i
].hwirq
== hwirq
)
655 if (i
>= irq_virq_count
)
656 i
= NUM_ISA_INTERRUPTS
;
660 EXPORT_SYMBOL_GPL(irq_find_mapping
);
663 unsigned int irq_radix_revmap(struct irq_host
*host
,
664 irq_hw_number_t hwirq
)
666 struct radix_tree_root
*tree
;
667 struct irq_map_entry
*ptr
;
671 WARN_ON(host
->revmap_type
!= IRQ_HOST_MAP_TREE
);
673 /* Check if the radix tree exist yet. We test the value of
674 * the gfp_mask for that. Sneaky but saves another int in the
675 * structure. If not, we fallback to slow mode
677 tree
= &host
->revmap_data
.tree
;
678 if (tree
->gfp_mask
== 0)
679 return irq_find_mapping(host
, hwirq
);
681 /* XXX Current radix trees are NOT SMP safe !!! Remove that lock
682 * when that is fixed (when Nick's patch gets in
684 spin_lock_irqsave(&irq_big_lock
, flags
);
686 /* Now try to resolve */
687 ptr
= radix_tree_lookup(tree
, hwirq
);
688 /* Found it, return */
690 virq
= ptr
- irq_map
;
694 /* If not there, try to insert it */
695 virq
= irq_find_mapping(host
, hwirq
);
697 radix_tree_insert(tree
, virq
, &irq_map
[virq
]);
699 spin_unlock_irqrestore(&irq_big_lock
, flags
);
703 unsigned int irq_linear_revmap(struct irq_host
*host
,
704 irq_hw_number_t hwirq
)
706 unsigned int *revmap
;
708 WARN_ON(host
->revmap_type
!= IRQ_HOST_MAP_LINEAR
);
710 /* Check revmap bounds */
711 if (unlikely(hwirq
>= host
->revmap_data
.linear
.size
))
712 return irq_find_mapping(host
, hwirq
);
714 /* Check if revmap was allocated */
715 revmap
= host
->revmap_data
.linear
.revmap
;
716 if (unlikely(revmap
== NULL
))
717 return irq_find_mapping(host
, hwirq
);
719 /* Fill up revmap with slow path if no mapping found */
720 if (unlikely(revmap
[hwirq
] == NO_IRQ
))
721 revmap
[hwirq
] = irq_find_mapping(host
, hwirq
);
723 return revmap
[hwirq
];
726 unsigned int irq_alloc_virt(struct irq_host
*host
,
731 unsigned int i
, j
, found
= NO_IRQ
;
732 unsigned int limit
= irq_virq_count
- count
;
734 if (count
== 0 || count
> (irq_virq_count
- NUM_ISA_INTERRUPTS
))
737 spin_lock_irqsave(&irq_big_lock
, flags
);
739 /* Use hint for 1 interrupt if any */
740 if (count
== 1 && hint
>= NUM_ISA_INTERRUPTS
&&
741 hint
< irq_virq_count
&& irq_map
[hint
].host
== NULL
) {
746 /* Look for count consecutive numbers in the allocatable
749 for (i
= NUM_ISA_INTERRUPTS
; i
<= limit
; ) {
750 for (j
= i
; j
< (i
+ count
); j
++)
751 if (irq_map
[j
].host
!= NULL
) {
758 if (found
== NO_IRQ
) {
759 spin_unlock_irqrestore(&irq_big_lock
, flags
);
763 for (i
= found
; i
< (found
+ count
); i
++) {
764 irq_map
[i
].hwirq
= host
->inval_irq
;
766 irq_map
[i
].host
= host
;
768 spin_unlock_irqrestore(&irq_big_lock
, flags
);
772 void irq_free_virt(unsigned int virq
, unsigned int count
)
777 WARN_ON (virq
< NUM_ISA_INTERRUPTS
);
778 WARN_ON (count
== 0 || (virq
+ count
) > irq_virq_count
);
780 spin_lock_irqsave(&irq_big_lock
, flags
);
781 for (i
= virq
; i
< (virq
+ count
); i
++) {
782 struct irq_host
*host
;
784 if (i
< NUM_ISA_INTERRUPTS
||
785 (virq
+ count
) > irq_virq_count
)
788 host
= irq_map
[i
].host
;
789 irq_map
[i
].hwirq
= host
->inval_irq
;
791 irq_map
[i
].host
= NULL
;
793 spin_unlock_irqrestore(&irq_big_lock
, flags
);
796 void irq_early_init(void)
800 for (i
= 0; i
< NR_IRQS
; i
++)
801 get_irq_desc(i
)->status
|= IRQ_NOREQUEST
;
804 /* We need to create the radix trees late */
805 static int irq_late_init(void)
810 spin_lock_irqsave(&irq_big_lock
, flags
);
811 list_for_each_entry(h
, &irq_hosts
, link
) {
812 if (h
->revmap_type
== IRQ_HOST_MAP_TREE
)
813 INIT_RADIX_TREE(&h
->revmap_data
.tree
, GFP_ATOMIC
);
815 spin_unlock_irqrestore(&irq_big_lock
, flags
);
819 arch_initcall(irq_late_init
);
821 #endif /* CONFIG_PPC_MERGE */
823 #ifdef CONFIG_PCI_MSI
824 int pci_enable_msi(struct pci_dev
* pdev
)
826 if (ppc_md
.enable_msi
)
827 return ppc_md
.enable_msi(pdev
);
831 EXPORT_SYMBOL(pci_enable_msi
);
833 void pci_disable_msi(struct pci_dev
* pdev
)
835 if (ppc_md
.disable_msi
)
836 ppc_md
.disable_msi(pdev
);
838 EXPORT_SYMBOL(pci_disable_msi
);
840 void pci_scan_msi_device(struct pci_dev
*dev
) {}
841 int pci_enable_msix(struct pci_dev
* dev
, struct msix_entry
*entries
, int nvec
) {return -1;}
842 void pci_disable_msix(struct pci_dev
*dev
) {}
843 void msi_remove_pci_irq_vectors(struct pci_dev
*dev
) {}
844 void disable_msi_mode(struct pci_dev
*dev
, int pos
, int type
) {}
845 void pci_no_msi(void) {}
846 EXPORT_SYMBOL(pci_enable_msix
);
847 EXPORT_SYMBOL(pci_disable_msix
);
852 static int __init
setup_noirqdistrib(char *str
)
858 __setup("noirqdistrib", setup_noirqdistrib
);
859 #endif /* CONFIG_PPC64 */