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>
69 #include <asm/firmware.h>
72 int __irq_offset_value
;
73 static int ppc_spurious_interrupts
;
76 EXPORT_SYMBOL(__irq_offset_value
);
77 atomic_t ppc_n_lost_interrupts
;
79 #ifndef CONFIG_PPC_MERGE
80 #define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
81 unsigned long ppc_cached_irq_mask
[NR_MASK_WORDS
];
85 extern int tau_initialized
;
86 extern int tau_interrupts(int);
88 #endif /* CONFIG_PPC32 */
90 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
91 extern atomic_t ipi_recv
;
92 extern atomic_t ipi_sent
;
96 EXPORT_SYMBOL(irq_desc
);
98 int distribute_irqs
= 1;
100 void local_irq_restore(unsigned long en
)
102 get_paca()->soft_enabled
= en
;
106 if (firmware_has_feature(FW_FEATURE_ISERIES
)) {
107 if (get_paca()->lppaca_ptr
->int_dword
.any_int
)
108 iseries_handle_interrupts();
112 if (get_paca()->hard_enabled
)
114 /* need to hard-enable interrupts here */
115 get_paca()->hard_enabled
= en
;
116 if ((int)mfspr(SPRN_DEC
) < 0)
120 #endif /* CONFIG_PPC64 */
122 int show_interrupts(struct seq_file
*p
, void *v
)
124 int i
= *(loff_t
*)v
, j
;
125 struct irqaction
*action
;
131 for_each_online_cpu(j
)
132 seq_printf(p
, "CPU%d ", j
);
137 desc
= get_irq_desc(i
);
138 spin_lock_irqsave(&desc
->lock
, flags
);
139 action
= desc
->action
;
140 if (!action
|| !action
->handler
)
142 seq_printf(p
, "%3d: ", i
);
144 for_each_online_cpu(j
)
145 seq_printf(p
, "%10u ", kstat_cpu(j
).irqs
[i
]);
147 seq_printf(p
, "%10u ", kstat_irqs(i
));
148 #endif /* CONFIG_SMP */
150 seq_printf(p
, " %s ", desc
->chip
->typename
);
152 seq_puts(p
, " None ");
153 seq_printf(p
, "%s", (desc
->status
& IRQ_LEVEL
) ? "Level " : "Edge ");
154 seq_printf(p
, " %s", action
->name
);
155 for (action
= action
->next
; action
; action
= action
->next
)
156 seq_printf(p
, ", %s", action
->name
);
159 spin_unlock_irqrestore(&desc
->lock
, flags
);
160 } else if (i
== NR_IRQS
) {
162 #ifdef CONFIG_TAU_INT
163 if (tau_initialized
){
164 seq_puts(p
, "TAU: ");
165 for_each_online_cpu(j
)
166 seq_printf(p
, "%10u ", tau_interrupts(j
));
167 seq_puts(p
, " PowerPC Thermal Assist (cpu temp)\n");
170 #if defined(CONFIG_SMP) && !defined(CONFIG_PPC_MERGE)
171 /* should this be per processor send/receive? */
172 seq_printf(p
, "IPI (recv/sent): %10u/%u\n",
173 atomic_read(&ipi_recv
), atomic_read(&ipi_sent
));
175 #endif /* CONFIG_PPC32 */
176 seq_printf(p
, "BAD: %10u\n", ppc_spurious_interrupts
);
181 #ifdef CONFIG_HOTPLUG_CPU
182 void fixup_irqs(cpumask_t map
)
190 if (irq_desc
[irq
].status
& IRQ_PER_CPU
)
193 cpus_and(mask
, irq_desc
[irq
].affinity
, map
);
194 if (any_online_cpu(mask
) == NR_CPUS
) {
195 printk("Breaking affinity for irq %i\n", irq
);
198 if (irq_desc
[irq
].chip
->set_affinity
)
199 irq_desc
[irq
].chip
->set_affinity(irq
, mask
);
200 else if (irq_desc
[irq
].action
&& !(warned
++))
201 printk("Cannot set affinity for irq %i\n", irq
);
210 void do_IRQ(struct pt_regs
*regs
)
212 struct pt_regs
*old_regs
= set_irq_regs(regs
);
214 #ifdef CONFIG_IRQSTACKS
215 struct thread_info
*curtp
, *irqtp
;
220 #ifdef CONFIG_DEBUG_STACKOVERFLOW
221 /* Debugging check for stack overflow: is there less than 2KB free? */
225 sp
= __get_SP() & (THREAD_SIZE
-1);
227 if (unlikely(sp
< (sizeof(struct thread_info
) + 2048))) {
228 printk("do_IRQ: stack overflow: %ld\n",
229 sp
- sizeof(struct thread_info
));
236 * Every platform is required to implement ppc_md.get_irq.
237 * This function will either return an irq number or -1 to
238 * indicate there are no more pending.
239 * The value -2 is for buggy hardware and means that this IRQ
240 * has already been handled. -- Tom
242 irq
= ppc_md
.get_irq();
244 if (irq
!= NO_IRQ
&& irq
!= NO_IRQ_IGNORE
) {
245 #ifdef CONFIG_IRQSTACKS
246 /* Switch to the irq stack to handle this */
247 curtp
= current_thread_info();
248 irqtp
= hardirq_ctx
[smp_processor_id()];
249 if (curtp
!= irqtp
) {
250 struct irq_desc
*desc
= irq_desc
+ irq
;
251 void *handler
= desc
->handle_irq
;
254 irqtp
->task
= curtp
->task
;
256 call_handle_irq(irq
, desc
, irqtp
, handler
);
259 set_bits(irqtp
->flags
, &curtp
->flags
);
262 generic_handle_irq(irq
);
263 } else if (irq
!= NO_IRQ_IGNORE
)
264 /* That's not SMP safe ... but who cares ? */
265 ppc_spurious_interrupts
++;
268 set_irq_regs(old_regs
);
270 #ifdef CONFIG_PPC_ISERIES
271 if (get_lppaca()->int_dword
.fields
.decr_int
) {
272 get_lppaca()->int_dword
.fields
.decr_int
= 0;
273 /* Signal a fake decrementer interrupt */
274 timer_interrupt(regs
);
279 void __init
init_IRQ(void)
288 #ifdef CONFIG_IRQSTACKS
289 struct thread_info
*softirq_ctx
[NR_CPUS
] __read_mostly
;
290 struct thread_info
*hardirq_ctx
[NR_CPUS
] __read_mostly
;
292 void irq_ctx_init(void)
294 struct thread_info
*tp
;
297 for_each_possible_cpu(i
) {
298 memset((void *)softirq_ctx
[i
], 0, THREAD_SIZE
);
301 tp
->preempt_count
= SOFTIRQ_OFFSET
;
303 memset((void *)hardirq_ctx
[i
], 0, THREAD_SIZE
);
306 tp
->preempt_count
= HARDIRQ_OFFSET
;
310 static inline void do_softirq_onstack(void)
312 struct thread_info
*curtp
, *irqtp
;
314 curtp
= current_thread_info();
315 irqtp
= softirq_ctx
[smp_processor_id()];
316 irqtp
->task
= curtp
->task
;
317 call_do_softirq(irqtp
);
322 #define do_softirq_onstack() __do_softirq()
323 #endif /* CONFIG_IRQSTACKS */
325 void do_softirq(void)
332 local_irq_save(flags
);
334 if (local_softirq_pending())
335 do_softirq_onstack();
337 local_irq_restore(flags
);
339 EXPORT_SYMBOL(do_softirq
);
343 * IRQ controller and virtual interrupts
346 #ifdef CONFIG_PPC_MERGE
348 static LIST_HEAD(irq_hosts
);
349 static spinlock_t irq_big_lock
= SPIN_LOCK_UNLOCKED
;
350 static DEFINE_PER_CPU(unsigned int, irq_radix_reader
);
351 static unsigned int irq_radix_writer
;
352 struct irq_map_entry irq_map
[NR_IRQS
];
353 static unsigned int irq_virq_count
= NR_IRQS
;
354 static struct irq_host
*irq_default_host
;
356 struct irq_host
*irq_alloc_host(unsigned int revmap_type
,
357 unsigned int revmap_arg
,
358 struct irq_host_ops
*ops
,
359 irq_hw_number_t inval_irq
)
361 struct irq_host
*host
;
362 unsigned int size
= sizeof(struct irq_host
);
367 /* Allocate structure and revmap table if using linear mapping */
368 if (revmap_type
== IRQ_HOST_MAP_LINEAR
)
369 size
+= revmap_arg
* sizeof(unsigned int);
371 host
= kzalloc(size
, GFP_KERNEL
);
373 host
= alloc_bootmem(size
);
375 memset(host
, 0, size
);
381 host
->revmap_type
= revmap_type
;
382 host
->inval_irq
= inval_irq
;
385 spin_lock_irqsave(&irq_big_lock
, flags
);
387 /* If it's a legacy controller, check for duplicates and
388 * mark it as allocated (we use irq 0 host pointer for that
390 if (revmap_type
== IRQ_HOST_MAP_LEGACY
) {
391 if (irq_map
[0].host
!= NULL
) {
392 spin_unlock_irqrestore(&irq_big_lock
, flags
);
393 /* If we are early boot, we can't free the structure,
395 * this will be fixed once slab is made available early
396 * instead of the current cruft
402 irq_map
[0].host
= host
;
405 list_add(&host
->link
, &irq_hosts
);
406 spin_unlock_irqrestore(&irq_big_lock
, flags
);
408 /* Additional setups per revmap type */
409 switch(revmap_type
) {
410 case IRQ_HOST_MAP_LEGACY
:
411 /* 0 is always the invalid number for legacy */
413 /* setup us as the host for all legacy interrupts */
414 for (i
= 1; i
< NUM_ISA_INTERRUPTS
; i
++) {
415 irq_map
[i
].hwirq
= 0;
417 irq_map
[i
].host
= host
;
420 /* Clear norequest flags */
421 get_irq_desc(i
)->status
&= ~IRQ_NOREQUEST
;
423 /* Legacy flags are left to default at this point,
424 * one can then use irq_create_mapping() to
425 * explicitely change them
427 ops
->map(host
, i
, i
);
430 case IRQ_HOST_MAP_LINEAR
:
431 rmap
= (unsigned int *)(host
+ 1);
432 for (i
= 0; i
< revmap_arg
; i
++)
434 host
->revmap_data
.linear
.size
= revmap_arg
;
436 host
->revmap_data
.linear
.revmap
= rmap
;
442 pr_debug("irq: Allocated host of type %d @0x%p\n", revmap_type
, host
);
447 struct irq_host
*irq_find_host(struct device_node
*node
)
449 struct irq_host
*h
, *found
= NULL
;
452 /* We might want to match the legacy controller last since
453 * it might potentially be set to match all interrupts in
454 * the absence of a device node. This isn't a problem so far
457 spin_lock_irqsave(&irq_big_lock
, flags
);
458 list_for_each_entry(h
, &irq_hosts
, link
)
459 if (h
->ops
->match
== NULL
|| h
->ops
->match(h
, node
)) {
463 spin_unlock_irqrestore(&irq_big_lock
, flags
);
466 EXPORT_SYMBOL_GPL(irq_find_host
);
468 void irq_set_default_host(struct irq_host
*host
)
470 pr_debug("irq: Default host set to @0x%p\n", host
);
472 irq_default_host
= host
;
475 void irq_set_virq_count(unsigned int count
)
477 pr_debug("irq: Trying to set virq count to %d\n", count
);
479 BUG_ON(count
< NUM_ISA_INTERRUPTS
);
481 irq_virq_count
= count
;
484 /* radix tree not lockless safe ! we use a brlock-type mecanism
485 * for now, until we can use a lockless radix tree
487 static void irq_radix_wrlock(unsigned long *flags
)
489 unsigned int cpu
, ok
;
491 spin_lock_irqsave(&irq_big_lock
, *flags
);
492 irq_radix_writer
= 1;
497 for_each_possible_cpu(cpu
) {
498 if (per_cpu(irq_radix_reader
, cpu
)) {
508 static void irq_radix_wrunlock(unsigned long flags
)
511 irq_radix_writer
= 0;
512 spin_unlock_irqrestore(&irq_big_lock
, flags
);
515 static void irq_radix_rdlock(unsigned long *flags
)
517 local_irq_save(*flags
);
518 __get_cpu_var(irq_radix_reader
) = 1;
520 if (likely(irq_radix_writer
== 0))
522 __get_cpu_var(irq_radix_reader
) = 0;
524 spin_lock(&irq_big_lock
);
525 __get_cpu_var(irq_radix_reader
) = 1;
526 spin_unlock(&irq_big_lock
);
529 static void irq_radix_rdunlock(unsigned long flags
)
531 __get_cpu_var(irq_radix_reader
) = 0;
532 local_irq_restore(flags
);
536 unsigned int irq_create_mapping(struct irq_host
*host
,
537 irq_hw_number_t hwirq
)
539 unsigned int virq
, hint
;
541 pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", host
, hwirq
);
543 /* Look for default host if nececssary */
545 host
= irq_default_host
;
547 printk(KERN_WARNING
"irq_create_mapping called for"
548 " NULL host, hwirq=%lx\n", hwirq
);
552 pr_debug("irq: -> using host @%p\n", host
);
554 /* Check if mapping already exist, if it does, call
555 * host->ops->map() to update the flags
557 virq
= irq_find_mapping(host
, hwirq
);
558 if (virq
!= IRQ_NONE
) {
559 pr_debug("irq: -> existing mapping on virq %d\n", virq
);
563 /* Get a virtual interrupt number */
564 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
) {
566 virq
= (unsigned int)hwirq
;
567 if (virq
== 0 || virq
>= NUM_ISA_INTERRUPTS
)
571 /* Allocate a virtual interrupt number */
572 hint
= hwirq
% irq_virq_count
;
573 virq
= irq_alloc_virt(host
, 1, hint
);
574 if (virq
== NO_IRQ
) {
575 pr_debug("irq: -> virq allocation failed\n");
579 pr_debug("irq: -> obtained virq %d\n", virq
);
581 /* Clear IRQ_NOREQUEST flag */
582 get_irq_desc(virq
)->status
&= ~IRQ_NOREQUEST
;
586 irq_map
[virq
].hwirq
= hwirq
;
588 if (host
->ops
->map(host
, virq
, hwirq
)) {
589 pr_debug("irq: -> mapping failed, freeing\n");
590 irq_free_virt(virq
, 1);
595 EXPORT_SYMBOL_GPL(irq_create_mapping
);
597 unsigned int irq_create_of_mapping(struct device_node
*controller
,
598 u32
*intspec
, unsigned int intsize
)
600 struct irq_host
*host
;
601 irq_hw_number_t hwirq
;
602 unsigned int type
= IRQ_TYPE_NONE
;
605 if (controller
== NULL
)
606 host
= irq_default_host
;
608 host
= irq_find_host(controller
);
610 printk(KERN_WARNING
"irq: no irq host found for %s !\n",
611 controller
->full_name
);
615 /* If host has no translation, then we assume interrupt line */
616 if (host
->ops
->xlate
== NULL
)
619 if (host
->ops
->xlate(host
, controller
, intspec
, intsize
,
625 virq
= irq_create_mapping(host
, hwirq
);
629 /* Set type if specified and different than the current one */
630 if (type
!= IRQ_TYPE_NONE
&&
631 type
!= (get_irq_desc(virq
)->status
& IRQF_TRIGGER_MASK
))
632 set_irq_type(virq
, type
);
635 EXPORT_SYMBOL_GPL(irq_create_of_mapping
);
637 unsigned int irq_of_parse_and_map(struct device_node
*dev
, int index
)
641 if (of_irq_map_one(dev
, index
, &oirq
))
644 return irq_create_of_mapping(oirq
.controller
, oirq
.specifier
,
647 EXPORT_SYMBOL_GPL(irq_of_parse_and_map
);
649 void irq_dispose_mapping(unsigned int virq
)
651 struct irq_host
*host
= irq_map
[virq
].host
;
652 irq_hw_number_t hwirq
;
655 WARN_ON (host
== NULL
);
659 /* Never unmap legacy interrupts */
660 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
)
663 /* remove chip and handler */
664 set_irq_chip_and_handler(virq
, NULL
, NULL
);
666 /* Make sure it's completed */
667 synchronize_irq(virq
);
669 /* Tell the PIC about it */
670 if (host
->ops
->unmap
)
671 host
->ops
->unmap(host
, virq
);
674 /* Clear reverse map */
675 hwirq
= irq_map
[virq
].hwirq
;
676 switch(host
->revmap_type
) {
677 case IRQ_HOST_MAP_LINEAR
:
678 if (hwirq
< host
->revmap_data
.linear
.size
)
679 host
->revmap_data
.linear
.revmap
[hwirq
] = IRQ_NONE
;
681 case IRQ_HOST_MAP_TREE
:
682 /* Check if radix tree allocated yet */
683 if (host
->revmap_data
.tree
.gfp_mask
== 0)
685 irq_radix_wrlock(&flags
);
686 radix_tree_delete(&host
->revmap_data
.tree
, hwirq
);
687 irq_radix_wrunlock(flags
);
693 irq_map
[virq
].hwirq
= host
->inval_irq
;
696 get_irq_desc(virq
)->status
|= IRQ_NOREQUEST
;
699 irq_free_virt(virq
, 1);
701 EXPORT_SYMBOL_GPL(irq_dispose_mapping
);
703 unsigned int irq_find_mapping(struct irq_host
*host
,
704 irq_hw_number_t hwirq
)
707 unsigned int hint
= hwirq
% irq_virq_count
;
709 /* Look for default host if nececssary */
711 host
= irq_default_host
;
715 /* legacy -> bail early */
716 if (host
->revmap_type
== IRQ_HOST_MAP_LEGACY
)
719 /* Slow path does a linear search of the map */
720 if (hint
< NUM_ISA_INTERRUPTS
)
721 hint
= NUM_ISA_INTERRUPTS
;
724 if (irq_map
[i
].host
== host
&&
725 irq_map
[i
].hwirq
== hwirq
)
728 if (i
>= irq_virq_count
)
729 i
= NUM_ISA_INTERRUPTS
;
733 EXPORT_SYMBOL_GPL(irq_find_mapping
);
736 unsigned int irq_radix_revmap(struct irq_host
*host
,
737 irq_hw_number_t hwirq
)
739 struct radix_tree_root
*tree
;
740 struct irq_map_entry
*ptr
;
744 WARN_ON(host
->revmap_type
!= IRQ_HOST_MAP_TREE
);
746 /* Check if the radix tree exist yet. We test the value of
747 * the gfp_mask for that. Sneaky but saves another int in the
748 * structure. If not, we fallback to slow mode
750 tree
= &host
->revmap_data
.tree
;
751 if (tree
->gfp_mask
== 0)
752 return irq_find_mapping(host
, hwirq
);
754 /* Now try to resolve */
755 irq_radix_rdlock(&flags
);
756 ptr
= radix_tree_lookup(tree
, hwirq
);
757 irq_radix_rdunlock(flags
);
759 /* Found it, return */
761 virq
= ptr
- irq_map
;
765 /* If not there, try to insert it */
766 virq
= irq_find_mapping(host
, hwirq
);
767 if (virq
!= NO_IRQ
) {
768 irq_radix_wrlock(&flags
);
769 radix_tree_insert(tree
, hwirq
, &irq_map
[virq
]);
770 irq_radix_wrunlock(flags
);
775 unsigned int irq_linear_revmap(struct irq_host
*host
,
776 irq_hw_number_t hwirq
)
778 unsigned int *revmap
;
780 WARN_ON(host
->revmap_type
!= IRQ_HOST_MAP_LINEAR
);
782 /* Check revmap bounds */
783 if (unlikely(hwirq
>= host
->revmap_data
.linear
.size
))
784 return irq_find_mapping(host
, hwirq
);
786 /* Check if revmap was allocated */
787 revmap
= host
->revmap_data
.linear
.revmap
;
788 if (unlikely(revmap
== NULL
))
789 return irq_find_mapping(host
, hwirq
);
791 /* Fill up revmap with slow path if no mapping found */
792 if (unlikely(revmap
[hwirq
] == NO_IRQ
))
793 revmap
[hwirq
] = irq_find_mapping(host
, hwirq
);
795 return revmap
[hwirq
];
798 unsigned int irq_alloc_virt(struct irq_host
*host
,
803 unsigned int i
, j
, found
= NO_IRQ
;
805 if (count
== 0 || count
> (irq_virq_count
- NUM_ISA_INTERRUPTS
))
808 spin_lock_irqsave(&irq_big_lock
, flags
);
810 /* Use hint for 1 interrupt if any */
811 if (count
== 1 && hint
>= NUM_ISA_INTERRUPTS
&&
812 hint
< irq_virq_count
&& irq_map
[hint
].host
== NULL
) {
817 /* Look for count consecutive numbers in the allocatable
820 for (i
= NUM_ISA_INTERRUPTS
, j
= 0; i
< irq_virq_count
; i
++) {
821 if (irq_map
[i
].host
!= NULL
)
827 found
= i
- count
+ 1;
831 if (found
== NO_IRQ
) {
832 spin_unlock_irqrestore(&irq_big_lock
, flags
);
836 for (i
= found
; i
< (found
+ count
); i
++) {
837 irq_map
[i
].hwirq
= host
->inval_irq
;
839 irq_map
[i
].host
= host
;
841 spin_unlock_irqrestore(&irq_big_lock
, flags
);
845 void irq_free_virt(unsigned int virq
, unsigned int count
)
850 WARN_ON (virq
< NUM_ISA_INTERRUPTS
);
851 WARN_ON (count
== 0 || (virq
+ count
) > irq_virq_count
);
853 spin_lock_irqsave(&irq_big_lock
, flags
);
854 for (i
= virq
; i
< (virq
+ count
); i
++) {
855 struct irq_host
*host
;
857 if (i
< NUM_ISA_INTERRUPTS
||
858 (virq
+ count
) > irq_virq_count
)
861 host
= irq_map
[i
].host
;
862 irq_map
[i
].hwirq
= host
->inval_irq
;
864 irq_map
[i
].host
= NULL
;
866 spin_unlock_irqrestore(&irq_big_lock
, flags
);
869 void irq_early_init(void)
873 for (i
= 0; i
< NR_IRQS
; i
++)
874 get_irq_desc(i
)->status
|= IRQ_NOREQUEST
;
877 /* We need to create the radix trees late */
878 static int irq_late_init(void)
883 irq_radix_wrlock(&flags
);
884 list_for_each_entry(h
, &irq_hosts
, link
) {
885 if (h
->revmap_type
== IRQ_HOST_MAP_TREE
)
886 INIT_RADIX_TREE(&h
->revmap_data
.tree
, GFP_ATOMIC
);
888 irq_radix_wrunlock(flags
);
892 arch_initcall(irq_late_init
);
894 #endif /* CONFIG_PPC_MERGE */
896 #ifdef CONFIG_PCI_MSI
897 int pci_enable_msi(struct pci_dev
* pdev
)
899 if (ppc_md
.enable_msi
)
900 return ppc_md
.enable_msi(pdev
);
904 EXPORT_SYMBOL(pci_enable_msi
);
906 void pci_disable_msi(struct pci_dev
* pdev
)
908 if (ppc_md
.disable_msi
)
909 ppc_md
.disable_msi(pdev
);
911 EXPORT_SYMBOL(pci_disable_msi
);
913 void pci_scan_msi_device(struct pci_dev
*dev
) {}
914 int pci_enable_msix(struct pci_dev
* dev
, struct msix_entry
*entries
, int nvec
) {return -1;}
915 void pci_disable_msix(struct pci_dev
*dev
) {}
916 void msi_remove_pci_irq_vectors(struct pci_dev
*dev
) {}
917 void disable_msi_mode(struct pci_dev
*dev
, int pos
, int type
) {}
918 void pci_no_msi(void) {}
919 EXPORT_SYMBOL(pci_enable_msix
);
920 EXPORT_SYMBOL(pci_disable_msix
);
925 static int __init
setup_noirqdistrib(char *str
)
931 __setup("noirqdistrib", setup_noirqdistrib
);
932 #endif /* CONFIG_PPC64 */