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>
56 #include <asm/uaccess.h>
57 #include <asm/system.h>
59 #include <asm/pgtable.h>
61 #include <asm/cache.h>
63 #include <asm/ptrace.h>
64 #include <asm/machdep.h>
66 #ifdef CONFIG_PPC_ISERIES
70 int __irq_offset_value
;
71 static int ppc_spurious_interrupts
;
74 EXPORT_SYMBOL(__irq_offset_value
);
75 atomic_t ppc_n_lost_interrupts
;
77 #ifndef CONFIG_PPC_MERGE
78 #define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
79 unsigned long ppc_cached_irq_mask
[NR_MASK_WORDS
];
83 extern int tau_initialized
;
84 extern int tau_interrupts(int);
86 #endif /* CONFIG_PPC32 */
88 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
89 extern atomic_t ipi_recv
;
90 extern atomic_t ipi_sent
;
94 EXPORT_SYMBOL(irq_desc
);
96 int distribute_irqs
= 1;
97 #endif /* CONFIG_PPC64 */
99 int show_interrupts(struct seq_file
*p
, void *v
)
101 int i
= *(loff_t
*)v
, j
;
102 struct irqaction
*action
;
108 for_each_online_cpu(j
)
109 seq_printf(p
, "CPU%d ", j
);
114 desc
= get_irq_desc(i
);
115 spin_lock_irqsave(&desc
->lock
, flags
);
116 action
= desc
->action
;
117 if (!action
|| !action
->handler
)
119 seq_printf(p
, "%3d: ", i
);
121 for_each_online_cpu(j
)
122 seq_printf(p
, "%10u ", kstat_cpu(j
).irqs
[i
]);
124 seq_printf(p
, "%10u ", kstat_irqs(i
));
125 #endif /* CONFIG_SMP */
127 seq_printf(p
, " %s ", desc
->chip
->typename
);
129 seq_puts(p
, " None ");
130 seq_printf(p
, "%s", (desc
->status
& IRQ_LEVEL
) ? "Level " : "Edge ");
131 seq_printf(p
, " %s", action
->name
);
132 for (action
= action
->next
; action
; action
= action
->next
)
133 seq_printf(p
, ", %s", action
->name
);
136 spin_unlock_irqrestore(&desc
->lock
, flags
);
137 } else if (i
== NR_IRQS
) {
139 #ifdef CONFIG_TAU_INT
140 if (tau_initialized
){
141 seq_puts(p
, "TAU: ");
142 for_each_online_cpu(j
)
143 seq_printf(p
, "%10u ", tau_interrupts(j
));
144 seq_puts(p
, " PowerPC Thermal Assist (cpu temp)\n");
147 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
148 /* should this be per processor send/receive? */
149 seq_printf(p
, "IPI (recv/sent): %10u/%u\n",
150 atomic_read(&ipi_recv
), atomic_read(&ipi_sent
));
152 #endif /* CONFIG_PPC32 */
153 seq_printf(p
, "BAD: %10u\n", ppc_spurious_interrupts
);
158 #ifdef CONFIG_HOTPLUG_CPU
159 void fixup_irqs(cpumask_t map
)
167 if (irq_desc
[irq
].status
& IRQ_PER_CPU
)
170 cpus_and(mask
, irq_desc
[irq
].affinity
, map
);
171 if (any_online_cpu(mask
) == NR_CPUS
) {
172 printk("Breaking affinity for irq %i\n", irq
);
175 if (irq_desc
[irq
].chip
->set_affinity
)
176 irq_desc
[irq
].chip
->set_affinity(irq
, mask
);
177 else if (irq_desc
[irq
].action
&& !(warned
++))
178 printk("Cannot set affinity for irq %i\n", irq
);
187 void do_IRQ(struct pt_regs
*regs
)
190 #ifdef CONFIG_IRQSTACKS
191 struct thread_info
*curtp
, *irqtp
;
196 #ifdef CONFIG_DEBUG_STACKOVERFLOW
197 /* Debugging check for stack overflow: is there less than 2KB free? */
201 sp
= __get_SP() & (THREAD_SIZE
-1);
203 if (unlikely(sp
< (sizeof(struct thread_info
) + 2048))) {
204 printk("do_IRQ: stack overflow: %ld\n",
205 sp
- sizeof(struct thread_info
));
212 * Every platform is required to implement ppc_md.get_irq.
213 * This function will either return an irq number or -1 to
214 * indicate there are no more pending.
215 * The value -2 is for buggy hardware and means that this IRQ
216 * has already been handled. -- Tom
218 irq
= ppc_md
.get_irq(regs
);
220 if (irq
!= NO_IRQ
&& irq
!= NO_IRQ_IGNORE
) {
221 #ifdef CONFIG_IRQSTACKS
222 /* Switch to the irq stack to handle this */
223 curtp
= current_thread_info();
224 irqtp
= hardirq_ctx
[smp_processor_id()];
225 if (curtp
!= irqtp
) {
226 struct irq_desc
*desc
= irq_desc
+ irq
;
227 void *handler
= desc
->handle_irq
;
230 irqtp
->task
= curtp
->task
;
232 call_handle_irq(irq
, desc
, regs
, irqtp
, handler
);
235 set_bits(irqtp
->flags
, &curtp
->flags
);
238 generic_handle_irq(irq
, regs
);
239 } else if (irq
!= NO_IRQ_IGNORE
)
240 /* That's not SMP safe ... but who cares ? */
241 ppc_spurious_interrupts
++;
245 #ifdef CONFIG_PPC_ISERIES
246 if (get_lppaca()->int_dword
.fields
.decr_int
) {
247 get_lppaca()->int_dword
.fields
.decr_int
= 0;
248 /* Signal a fake decrementer interrupt */
249 timer_interrupt(regs
);
254 void __init
init_IRQ(void)
263 #ifdef CONFIG_IRQSTACKS
264 struct thread_info
*softirq_ctx
[NR_CPUS
] __read_mostly
;
265 struct thread_info
*hardirq_ctx
[NR_CPUS
] __read_mostly
;
267 void irq_ctx_init(void)
269 struct thread_info
*tp
;
272 for_each_possible_cpu(i
) {
273 memset((void *)softirq_ctx
[i
], 0, THREAD_SIZE
);
276 tp
->preempt_count
= SOFTIRQ_OFFSET
;
278 memset((void *)hardirq_ctx
[i
], 0, THREAD_SIZE
);
281 tp
->preempt_count
= HARDIRQ_OFFSET
;
285 static inline void do_softirq_onstack(void)
287 struct thread_info
*curtp
, *irqtp
;
289 curtp
= current_thread_info();
290 irqtp
= softirq_ctx
[smp_processor_id()];
291 irqtp
->task
= curtp
->task
;
292 call_do_softirq(irqtp
);
297 #define do_softirq_onstack() __do_softirq()
298 #endif /* CONFIG_IRQSTACKS */
300 void do_softirq(void)
307 local_irq_save(flags
);
309 if (local_softirq_pending())
310 do_softirq_onstack();
312 local_irq_restore(flags
);
314 EXPORT_SYMBOL(do_softirq
);
318 * IRQ controller and virtual interrupts
321 #ifdef CONFIG_PPC_MERGE
323 static LIST_HEAD(irq_hosts
);
324 static spinlock_t irq_big_lock
= SPIN_LOCK_UNLOCKED
;
325 static DEFINE_PER_CPU(unsigned int, irq_radix_reader
);
326 static unsigned int irq_radix_writer
;
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 /* radix tree not lockless safe ! we use a brlock-type mecanism
460 * for now, until we can use a lockless radix tree
462 static void irq_radix_wrlock(unsigned long *flags
)
464 unsigned int cpu
, ok
;
466 spin_lock_irqsave(&irq_big_lock
, *flags
);
467 irq_radix_writer
= 1;
472 for_each_possible_cpu(cpu
) {
473 if (per_cpu(irq_radix_reader
, cpu
)) {
483 static void irq_radix_wrunlock(unsigned long flags
)
486 irq_radix_writer
= 0;
487 spin_unlock_irqrestore(&irq_big_lock
, flags
);
490 static void irq_radix_rdlock(unsigned long *flags
)
492 local_irq_save(*flags
);
493 __get_cpu_var(irq_radix_reader
) = 1;
495 if (likely(irq_radix_writer
== 0))
497 __get_cpu_var(irq_radix_reader
) = 0;
499 spin_lock(&irq_big_lock
);
500 __get_cpu_var(irq_radix_reader
) = 1;
501 spin_unlock(&irq_big_lock
);
504 static void irq_radix_rdunlock(unsigned long flags
)
506 __get_cpu_var(irq_radix_reader
) = 0;
507 local_irq_restore(flags
);
511 unsigned int irq_create_mapping(struct irq_host
*host
,
512 irq_hw_number_t hwirq
)
514 unsigned int virq
, hint
;
516 pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host
, hwirq
);
518 /* Look for default host if nececssary */
520 host
= irq_default_host
;
522 printk(KERN_WARNING
"irq_create_mapping called for"
523 " NULL host, hwirq=%lx\n", hwirq
);
527 pr_debug("irq: -> using host @%p\n", host
);
529 /* Check if mapping already exist, if it does, call
530 * host->ops->map() to update the flags
532 virq
= irq_find_mapping(host
, hwirq
);
533 if (virq
!= IRQ_NONE
) {
534 pr_debug("irq: -> existing mapping on virq %d\n", virq
);
538 /* Get a virtual interrupt number */
539 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
) {
541 virq
= (unsigned int)hwirq
;
542 if (virq
== 0 || virq
>= NUM_ISA_INTERRUPTS
)
546 /* Allocate a virtual interrupt number */
547 hint
= hwirq
% irq_virq_count
;
548 virq
= irq_alloc_virt(host
, 1, hint
);
549 if (virq
== NO_IRQ
) {
550 pr_debug("irq: -> virq allocation failed\n");
554 pr_debug("irq: -> obtained virq %d\n", virq
);
556 /* Clear IRQ_NOREQUEST flag */
557 get_irq_desc(virq
)->status
&= ~IRQ_NOREQUEST
;
561 irq_map
[virq
].hwirq
= hwirq
;
563 if (host
->ops
->map(host
, virq
, hwirq
)) {
564 pr_debug("irq: -> mapping failed, freeing\n");
565 irq_free_virt(virq
, 1);
570 EXPORT_SYMBOL_GPL(irq_create_mapping
);
572 extern unsigned int irq_create_of_mapping(struct device_node
*controller
,
573 u32
*intspec
, unsigned int intsize
)
575 struct irq_host
*host
;
576 irq_hw_number_t hwirq
;
577 unsigned int type
= IRQ_TYPE_NONE
;
580 if (controller
== NULL
)
581 host
= irq_default_host
;
583 host
= irq_find_host(controller
);
585 printk(KERN_WARNING
"irq: no irq host found for %s !\n",
586 controller
->full_name
);
590 /* If host has no translation, then we assume interrupt line */
591 if (host
->ops
->xlate
== NULL
)
594 if (host
->ops
->xlate(host
, controller
, intspec
, intsize
,
600 virq
= irq_create_mapping(host
, hwirq
);
604 /* Set type if specified and different than the current one */
605 if (type
!= IRQ_TYPE_NONE
&&
606 type
!= (get_irq_desc(virq
)->status
& IRQF_TRIGGER_MASK
))
607 set_irq_type(virq
, type
);
610 EXPORT_SYMBOL_GPL(irq_create_of_mapping
);
612 unsigned int irq_of_parse_and_map(struct device_node
*dev
, int index
)
616 if (of_irq_map_one(dev
, index
, &oirq
))
619 return irq_create_of_mapping(oirq
.controller
, oirq
.specifier
,
622 EXPORT_SYMBOL_GPL(irq_of_parse_and_map
);
624 void irq_dispose_mapping(unsigned int virq
)
626 struct irq_host
*host
= irq_map
[virq
].host
;
627 irq_hw_number_t hwirq
;
630 WARN_ON (host
== NULL
);
634 /* Never unmap legacy interrupts */
635 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
)
638 /* remove chip and handler */
639 set_irq_chip_and_handler(virq
, NULL
, NULL
);
641 /* Make sure it's completed */
642 synchronize_irq(virq
);
644 /* Tell the PIC about it */
645 if (host
->ops
->unmap
)
646 host
->ops
->unmap(host
, virq
);
649 /* Clear reverse map */
650 hwirq
= irq_map
[virq
].hwirq
;
651 switch(host
->revmap_type
) {
652 case IRQ_HOST_MAP_LINEAR
:
653 if (hwirq
< host
->revmap_data
.linear
.size
)
654 host
->revmap_data
.linear
.revmap
[hwirq
] = IRQ_NONE
;
656 case IRQ_HOST_MAP_TREE
:
657 /* Check if radix tree allocated yet */
658 if (host
->revmap_data
.tree
.gfp_mask
== 0)
660 irq_radix_wrlock(&flags
);
661 radix_tree_delete(&host
->revmap_data
.tree
, hwirq
);
662 irq_radix_wrunlock(flags
);
668 irq_map
[virq
].hwirq
= host
->inval_irq
;
671 get_irq_desc(virq
)->status
|= IRQ_NOREQUEST
;
674 irq_free_virt(virq
, 1);
676 EXPORT_SYMBOL_GPL(irq_dispose_mapping
);
678 unsigned int irq_find_mapping(struct irq_host
*host
,
679 irq_hw_number_t hwirq
)
682 unsigned int hint
= hwirq
% irq_virq_count
;
684 /* Look for default host if nececssary */
686 host
= irq_default_host
;
690 /* legacy -> bail early */
691 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
)
694 /* Slow path does a linear search of the map */
695 if (hint
< NUM_ISA_INTERRUPTS
)
696 hint
= NUM_ISA_INTERRUPTS
;
699 if (irq_map
[i
].host
== host
&&
700 irq_map
[i
].hwirq
== hwirq
)
703 if (i
>= irq_virq_count
)
704 i
= NUM_ISA_INTERRUPTS
;
708 EXPORT_SYMBOL_GPL(irq_find_mapping
);
711 unsigned int irq_radix_revmap(struct irq_host
*host
,
712 irq_hw_number_t hwirq
)
714 struct radix_tree_root
*tree
;
715 struct irq_map_entry
*ptr
;
719 WARN_ON(host
->revmap_type
!= IRQ_HOST_MAP_TREE
);
721 /* Check if the radix tree exist yet. We test the value of
722 * the gfp_mask for that. Sneaky but saves another int in the
723 * structure. If not, we fallback to slow mode
725 tree
= &host
->revmap_data
.tree
;
726 if (tree
->gfp_mask
== 0)
727 return irq_find_mapping(host
, hwirq
);
729 /* Now try to resolve */
730 irq_radix_rdlock(&flags
);
731 ptr
= radix_tree_lookup(tree
, hwirq
);
732 irq_radix_rdunlock(flags
);
734 /* Found it, return */
736 virq
= ptr
- irq_map
;
740 /* If not there, try to insert it */
741 virq
= irq_find_mapping(host
, hwirq
);
742 if (virq
!= NO_IRQ
) {
743 irq_radix_wrlock(&flags
);
744 radix_tree_insert(tree
, hwirq
, &irq_map
[virq
]);
745 irq_radix_wrunlock(flags
);
750 unsigned int irq_linear_revmap(struct irq_host
*host
,
751 irq_hw_number_t hwirq
)
753 unsigned int *revmap
;
755 WARN_ON(host
->revmap_type
!= IRQ_HOST_MAP_LINEAR
);
757 /* Check revmap bounds */
758 if (unlikely(hwirq
>= host
->revmap_data
.linear
.size
))
759 return irq_find_mapping(host
, hwirq
);
761 /* Check if revmap was allocated */
762 revmap
= host
->revmap_data
.linear
.revmap
;
763 if (unlikely(revmap
== NULL
))
764 return irq_find_mapping(host
, hwirq
);
766 /* Fill up revmap with slow path if no mapping found */
767 if (unlikely(revmap
[hwirq
] == NO_IRQ
))
768 revmap
[hwirq
] = irq_find_mapping(host
, hwirq
);
770 return revmap
[hwirq
];
773 unsigned int irq_alloc_virt(struct irq_host
*host
,
778 unsigned int i
, j
, found
= NO_IRQ
;
779 unsigned int limit
= irq_virq_count
- count
;
781 if (count
== 0 || count
> (irq_virq_count
- NUM_ISA_INTERRUPTS
))
784 spin_lock_irqsave(&irq_big_lock
, flags
);
786 /* Use hint for 1 interrupt if any */
787 if (count
== 1 && hint
>= NUM_ISA_INTERRUPTS
&&
788 hint
< irq_virq_count
&& irq_map
[hint
].host
== NULL
) {
793 /* Look for count consecutive numbers in the allocatable
796 for (i
= NUM_ISA_INTERRUPTS
; i
<= limit
; ) {
797 for (j
= i
; j
< (i
+ count
); j
++)
798 if (irq_map
[j
].host
!= NULL
) {
805 if (found
== NO_IRQ
) {
806 spin_unlock_irqrestore(&irq_big_lock
, flags
);
810 for (i
= found
; i
< (found
+ count
); i
++) {
811 irq_map
[i
].hwirq
= host
->inval_irq
;
813 irq_map
[i
].host
= host
;
815 spin_unlock_irqrestore(&irq_big_lock
, flags
);
819 void irq_free_virt(unsigned int virq
, unsigned int count
)
824 WARN_ON (virq
< NUM_ISA_INTERRUPTS
);
825 WARN_ON (count
== 0 || (virq
+ count
) > irq_virq_count
);
827 spin_lock_irqsave(&irq_big_lock
, flags
);
828 for (i
= virq
; i
< (virq
+ count
); i
++) {
829 struct irq_host
*host
;
831 if (i
< NUM_ISA_INTERRUPTS
||
832 (virq
+ count
) > irq_virq_count
)
835 host
= irq_map
[i
].host
;
836 irq_map
[i
].hwirq
= host
->inval_irq
;
838 irq_map
[i
].host
= NULL
;
840 spin_unlock_irqrestore(&irq_big_lock
, flags
);
843 void irq_early_init(void)
847 for (i
= 0; i
< NR_IRQS
; i
++)
848 get_irq_desc(i
)->status
|= IRQ_NOREQUEST
;
851 /* We need to create the radix trees late */
852 static int irq_late_init(void)
857 irq_radix_wrlock(&flags
);
858 list_for_each_entry(h
, &irq_hosts
, link
) {
859 if (h
->revmap_type
== IRQ_HOST_MAP_TREE
)
860 INIT_RADIX_TREE(&h
->revmap_data
.tree
, GFP_ATOMIC
);
862 irq_radix_wrunlock(flags
);
866 arch_initcall(irq_late_init
);
868 #endif /* CONFIG_PPC_MERGE */
870 #ifdef CONFIG_PCI_MSI
871 int pci_enable_msi(struct pci_dev
* pdev
)
873 if (ppc_md
.enable_msi
)
874 return ppc_md
.enable_msi(pdev
);
879 void pci_disable_msi(struct pci_dev
* pdev
)
881 if (ppc_md
.disable_msi
)
882 ppc_md
.disable_msi(pdev
);
885 void pci_scan_msi_device(struct pci_dev
*dev
) {}
886 int pci_enable_msix(struct pci_dev
* dev
, struct msix_entry
*entries
, int nvec
) {return -1;}
887 void pci_disable_msix(struct pci_dev
*dev
) {}
888 void msi_remove_pci_irq_vectors(struct pci_dev
*dev
) {}
889 void disable_msi_mode(struct pci_dev
*dev
, int pos
, int type
) {}
890 void pci_no_msi(void) {}
895 static int __init
setup_noirqdistrib(char *str
)
901 __setup("noirqdistrib", setup_noirqdistrib
);
902 #endif /* CONFIG_PPC64 */