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-rw-r--r--include/asm-powerpc/irq.h654
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diff --git a/include/asm-powerpc/irq.h b/include/asm-powerpc/irq.h
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1#ifdef __KERNEL__
2#ifndef _ASM_POWERPC_IRQ_H
3#define _ASM_POWERPC_IRQ_H
4
5/*
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#include <linux/threads.h>
13#include <linux/list.h>
14#include <linux/radix-tree.h>
15
16#include <asm/types.h>
17#include <asm/atomic.h>
18
19
20#define get_irq_desc(irq) (&irq_desc[(irq)])
21
22/* Define a way to iterate across irqs. */
23#define for_each_irq(i) \
24 for ((i) = 0; (i) < NR_IRQS; ++(i))
25
26extern atomic_t ppc_n_lost_interrupts;
27
28#ifdef CONFIG_PPC_MERGE
29
30/* This number is used when no interrupt has been assigned */
31#define NO_IRQ (0)
32
33/* This is a special irq number to return from get_irq() to tell that
34 * no interrupt happened _and_ ignore it (don't count it as bad). Some
35 * platforms like iSeries rely on that.
36 */
37#define NO_IRQ_IGNORE ((unsigned int)-1)
38
39/* Total number of virq in the platform (make it a CONFIG_* option ? */
40#define NR_IRQS 512
41
42/* Number of irqs reserved for the legacy controller */
43#define NUM_ISA_INTERRUPTS 16
44
45/* This type is the placeholder for a hardware interrupt number. It has to
46 * be big enough to enclose whatever representation is used by a given
47 * platform.
48 */
49typedef unsigned long irq_hw_number_t;
50
51/* Interrupt controller "host" data structure. This could be defined as a
52 * irq domain controller. That is, it handles the mapping between hardware
53 * and virtual interrupt numbers for a given interrupt domain. The host
54 * structure is generally created by the PIC code for a given PIC instance
55 * (though a host can cover more than one PIC if they have a flat number
56 * model). It's the host callbacks that are responsible for setting the
57 * irq_chip on a given irq_desc after it's been mapped.
58 *
59 * The host code and data structures are fairly agnostic to the fact that
60 * we use an open firmware device-tree. We do have references to struct
61 * device_node in two places: in irq_find_host() to find the host matching
62 * a given interrupt controller node, and of course as an argument to its
63 * counterpart host->ops->match() callback. However, those are treated as
64 * generic pointers by the core and the fact that it's actually a device-node
65 * pointer is purely a convention between callers and implementation. This
66 * code could thus be used on other architectures by replacing those two
67 * by some sort of arch-specific void * "token" used to identify interrupt
68 * controllers.
69 */
70struct irq_host;
71struct radix_tree_root;
72
73/* Functions below are provided by the host and called whenever a new mapping
74 * is created or an old mapping is disposed. The host can then proceed to
75 * whatever internal data structures management is required. It also needs
76 * to setup the irq_desc when returning from map().
77 */
78struct irq_host_ops {
79 /* Match an interrupt controller device node to a host, returns
80 * 1 on a match
81 */
82 int (*match)(struct irq_host *h, struct device_node *node);
83
84 /* Create or update a mapping between a virtual irq number and a hw
85 * irq number. This is called only once for a given mapping.
86 */
87 int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
88
89 /* Dispose of such a mapping */
90 void (*unmap)(struct irq_host *h, unsigned int virq);
91
92 /* Update of such a mapping */
93 void (*remap)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw);
94
95 /* Translate device-tree interrupt specifier from raw format coming
96 * from the firmware to a irq_hw_number_t (interrupt line number) and
97 * type (sense) that can be passed to set_irq_type(). In the absence
98 * of this callback, irq_create_of_mapping() and irq_of_parse_and_map()
99 * will return the hw number in the first cell and IRQ_TYPE_NONE for
100 * the type (which amount to keeping whatever default value the
101 * interrupt controller has for that line)
102 */
103 int (*xlate)(struct irq_host *h, struct device_node *ctrler,
104 u32 *intspec, unsigned int intsize,
105 irq_hw_number_t *out_hwirq, unsigned int *out_type);
106};
107
108struct irq_host {
109 struct list_head link;
110
111 /* type of reverse mapping technique */
112 unsigned int revmap_type;
113#define IRQ_HOST_MAP_LEGACY 0 /* legacy 8259, gets irqs 1..15 */
114#define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */
115#define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */
116#define IRQ_HOST_MAP_TREE 3 /* radix tree */
117 union {
118 struct {
119 unsigned int size;
120 unsigned int *revmap;
121 } linear;
122 struct radix_tree_root tree;
123 } revmap_data;
124 struct irq_host_ops *ops;
125 void *host_data;
126 irq_hw_number_t inval_irq;
127
128 /* Optional device node pointer */
129 struct device_node *of_node;
130};
131
132/* The main irq map itself is an array of NR_IRQ entries containing the
133 * associate host and irq number. An entry with a host of NULL is free.
134 * An entry can be allocated if it's free, the allocator always then sets
135 * hwirq first to the host's invalid irq number and then fills ops.
136 */
137struct irq_map_entry {
138 irq_hw_number_t hwirq;
139 struct irq_host *host;
140};
141
142extern struct irq_map_entry irq_map[NR_IRQS];
143
144extern irq_hw_number_t virq_to_hw(unsigned int virq);
145
146/**
147 * irq_alloc_host - Allocate a new irq_host data structure
148 * @of_node: optional device-tree node of the interrupt controller
149 * @revmap_type: type of reverse mapping to use
150 * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map
151 * @ops: map/unmap host callbacks
152 * @inval_irq: provide a hw number in that host space that is always invalid
153 *
154 * Allocates and initialize and irq_host structure. Note that in the case of
155 * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns
156 * for all legacy interrupts except 0 (which is always the invalid irq for
157 * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by
158 * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated
159 * later during boot automatically (the reverse mapping will use the slow path
160 * until that happens).
161 */
162extern struct irq_host *irq_alloc_host(struct device_node *of_node,
163 unsigned int revmap_type,
164 unsigned int revmap_arg,
165 struct irq_host_ops *ops,
166 irq_hw_number_t inval_irq);
167
168
169/**
170 * irq_find_host - Locates a host for a given device node
171 * @node: device-tree node of the interrupt controller
172 */
173extern struct irq_host *irq_find_host(struct device_node *node);
174
175
176/**
177 * irq_set_default_host - Set a "default" host
178 * @host: default host pointer
179 *
180 * For convenience, it's possible to set a "default" host that will be used
181 * whenever NULL is passed to irq_create_mapping(). It makes life easier for
182 * platforms that want to manipulate a few hard coded interrupt numbers that
183 * aren't properly represented in the device-tree.
184 */
185extern void irq_set_default_host(struct irq_host *host);
186
187
188/**
189 * irq_set_virq_count - Set the maximum number of virt irqs
190 * @count: number of linux virtual irqs, capped with NR_IRQS
191 *
192 * This is mainly for use by platforms like iSeries who want to program
193 * the virtual irq number in the controller to avoid the reverse mapping
194 */
195extern void irq_set_virq_count(unsigned int count);
196
197
198/**
199 * irq_create_mapping - Map a hardware interrupt into linux virq space
200 * @host: host owning this hardware interrupt or NULL for default host
201 * @hwirq: hardware irq number in that host space
202 *
203 * Only one mapping per hardware interrupt is permitted. Returns a linux
204 * virq number.
205 * If the sense/trigger is to be specified, set_irq_type() should be called
206 * on the number returned from that call.
207 */
208extern unsigned int irq_create_mapping(struct irq_host *host,
209 irq_hw_number_t hwirq);
210
211
212/**
213 * irq_dispose_mapping - Unmap an interrupt
214 * @virq: linux virq number of the interrupt to unmap
215 */
216extern void irq_dispose_mapping(unsigned int virq);
217
218/**
219 * irq_find_mapping - Find a linux virq from an hw irq number.
220 * @host: host owning this hardware interrupt
221 * @hwirq: hardware irq number in that host space
222 *
223 * This is a slow path, for use by generic code. It's expected that an
224 * irq controller implementation directly calls the appropriate low level
225 * mapping function.
226 */
227extern unsigned int irq_find_mapping(struct irq_host *host,
228 irq_hw_number_t hwirq);
229
230/**
231 * irq_create_direct_mapping - Allocate a virq for direct mapping
232 * @host: host to allocate the virq for or NULL for default host
233 *
234 * This routine is used for irq controllers which can choose the hardware
235 * interrupt numbers they generate. In such a case it's simplest to use
236 * the linux virq as the hardware interrupt number.
237 */
238extern unsigned int irq_create_direct_mapping(struct irq_host *host);
239
240/**
241 * irq_radix_revmap - Find a linux virq from a hw irq number.
242 * @host: host owning this hardware interrupt
243 * @hwirq: hardware irq number in that host space
244 *
245 * This is a fast path, for use by irq controller code that uses radix tree
246 * revmaps
247 */
248extern unsigned int irq_radix_revmap(struct irq_host *host,
249 irq_hw_number_t hwirq);
250
251/**
252 * irq_linear_revmap - Find a linux virq from a hw irq number.
253 * @host: host owning this hardware interrupt
254 * @hwirq: hardware irq number in that host space
255 *
256 * This is a fast path, for use by irq controller code that uses linear
257 * revmaps. It does fallback to the slow path if the revmap doesn't exist
258 * yet and will create the revmap entry with appropriate locking
259 */
260
261extern unsigned int irq_linear_revmap(struct irq_host *host,
262 irq_hw_number_t hwirq);
263
264
265
266/**
267 * irq_alloc_virt - Allocate virtual irq numbers
268 * @host: host owning these new virtual irqs
269 * @count: number of consecutive numbers to allocate
270 * @hint: pass a hint number, the allocator will try to use a 1:1 mapping
271 *
272 * This is a low level function that is used internally by irq_create_mapping()
273 * and that can be used by some irq controllers implementations for things
274 * like allocating ranges of numbers for MSIs. The revmaps are left untouched.
275 */
276extern unsigned int irq_alloc_virt(struct irq_host *host,
277 unsigned int count,
278 unsigned int hint);
279
280/**
281 * irq_free_virt - Free virtual irq numbers
282 * @virq: virtual irq number of the first interrupt to free
283 * @count: number of interrupts to free
284 *
285 * This function is the opposite of irq_alloc_virt. It will not clear reverse
286 * maps, this should be done previously by unmap'ing the interrupt. In fact,
287 * all interrupts covered by the range being freed should have been unmapped
288 * prior to calling this.
289 */
290extern void irq_free_virt(unsigned int virq, unsigned int count);
291
292
293/* -- OF helpers -- */
294
295/* irq_create_of_mapping - Map a hardware interrupt into linux virq space
296 * @controller: Device node of the interrupt controller
297 * @inspec: Interrupt specifier from the device-tree
298 * @intsize: Size of the interrupt specifier from the device-tree
299 *
300 * This function is identical to irq_create_mapping except that it takes
301 * as input informations straight from the device-tree (typically the results
302 * of the of_irq_map_*() functions.
303 */
304extern unsigned int irq_create_of_mapping(struct device_node *controller,
305 u32 *intspec, unsigned int intsize);
306
307
308/* irq_of_parse_and_map - Parse nad Map an interrupt into linux virq space
309 * @device: Device node of the device whose interrupt is to be mapped
310 * @index: Index of the interrupt to map
311 *
312 * This function is a wrapper that chains of_irq_map_one() and
313 * irq_create_of_mapping() to make things easier to callers
314 */
315extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index);
316
317/* -- End OF helpers -- */
318
319/**
320 * irq_early_init - Init irq remapping subsystem
321 */
322extern void irq_early_init(void);
323
324static __inline__ int irq_canonicalize(int irq)
325{
326 return irq;
327}
328
329
330#else /* CONFIG_PPC_MERGE */
331
332/* This number is used when no interrupt has been assigned */
333#define NO_IRQ (-1)
334#define NO_IRQ_IGNORE (-2)
335
336
337/*
338 * These constants are used for passing information about interrupt
339 * signal polarity and level/edge sensing to the low-level PIC chip
340 * drivers.
341 */
342#define IRQ_SENSE_MASK 0x1
343#define IRQ_SENSE_LEVEL 0x1 /* interrupt on active level */
344#define IRQ_SENSE_EDGE 0x0 /* interrupt triggered by edge */
345
346#define IRQ_POLARITY_MASK 0x2
347#define IRQ_POLARITY_POSITIVE 0x2 /* high level or low->high edge */
348#define IRQ_POLARITY_NEGATIVE 0x0 /* low level or high->low edge */
349
350
351#if defined(CONFIG_40x)
352#include <asm/ibm4xx.h>
353
354#ifndef NR_BOARD_IRQS
355#define NR_BOARD_IRQS 0
356#endif
357
358#ifndef UIC_WIDTH /* Number of interrupts per device */
359#define UIC_WIDTH 32
360#endif
361
362#ifndef NR_UICS /* number of UIC devices */
363#define NR_UICS 1
364#endif
365
366#if defined (CONFIG_403)
367/*
368 * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has
369 * 32 possible interrupts, a majority of which are not implemented on
370 * all cores. There are six configurable, external interrupt pins and
371 * there are eight internal interrupts for the on-chip serial port
372 * (SPU), DMA controller, and JTAG controller.
373 *
374 */
375
376#define NR_AIC_IRQS 32
377#define NR_IRQS (NR_AIC_IRQS + NR_BOARD_IRQS)
378
379#elif !defined (CONFIG_403)
380
381/*
382 * The PowerPC 405 cores' Universal Interrupt Controller (UIC) has 32
383 * possible interrupts as well. There are seven, configurable external
384 * interrupt pins and there are 17 internal interrupts for the on-chip
385 * serial port, DMA controller, on-chip Ethernet controller, PCI, etc.
386 *
387 */
388
389
390#define NR_UIC_IRQS UIC_WIDTH
391#define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
392#endif
393
394#elif defined(CONFIG_44x)
395#include <asm/ibm44x.h>
396
397#define NR_UIC_IRQS 32
398#define NR_IRQS ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
399
400#elif defined(CONFIG_8xx)
401
402/* Now include the board configuration specific associations.
403*/
404#include <asm/mpc8xx.h>
405
406/* The MPC8xx cores have 16 possible interrupts. There are eight
407 * possible level sensitive interrupts assigned and generated internally
408 * from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer.
409 * There are eight external interrupts (IRQs) that can be configured
410 * as either level or edge sensitive.
411 *
412 * On some implementations, there is also the possibility of an 8259
413 * through the PCI and PCI-ISA bridges.
414 *
415 * We are "flattening" the interrupt vectors of the cascaded CPM
416 * and 8259 interrupt controllers so that we can uniquely identify
417 * any interrupt source with a single integer.
418 */
419#define NR_SIU_INTS 16
420#define NR_CPM_INTS 32
421#ifndef NR_8259_INTS
422#define NR_8259_INTS 0
423#endif
424
425#define SIU_IRQ_OFFSET 0
426#define CPM_IRQ_OFFSET (SIU_IRQ_OFFSET + NR_SIU_INTS)
427#define I8259_IRQ_OFFSET (CPM_IRQ_OFFSET + NR_CPM_INTS)
428
429#define NR_IRQS (NR_SIU_INTS + NR_CPM_INTS + NR_8259_INTS)
430
431/* These values must be zero-based and map 1:1 with the SIU configuration.
432 * They are used throughout the 8xx I/O subsystem to generate
433 * interrupt masks, flags, and other control patterns. This is why the
434 * current kernel assumption of the 8259 as the base controller is such
435 * a pain in the butt.
436 */
437#define SIU_IRQ0 (0) /* Highest priority */
438#define SIU_LEVEL0 (1)
439#define SIU_IRQ1 (2)
440#define SIU_LEVEL1 (3)
441#define SIU_IRQ2 (4)
442#define SIU_LEVEL2 (5)
443#define SIU_IRQ3 (6)
444#define SIU_LEVEL3 (7)
445#define SIU_IRQ4 (8)
446#define SIU_LEVEL4 (9)
447#define SIU_IRQ5 (10)
448#define SIU_LEVEL5 (11)
449#define SIU_IRQ6 (12)
450#define SIU_LEVEL6 (13)
451#define SIU_IRQ7 (14)
452#define SIU_LEVEL7 (15)
453
454#define MPC8xx_INT_FEC1 SIU_LEVEL1
455#define MPC8xx_INT_FEC2 SIU_LEVEL3
456
457#define MPC8xx_INT_SCC1 (CPM_IRQ_OFFSET + CPMVEC_SCC1)
458#define MPC8xx_INT_SCC2 (CPM_IRQ_OFFSET + CPMVEC_SCC2)
459#define MPC8xx_INT_SCC3 (CPM_IRQ_OFFSET + CPMVEC_SCC3)
460#define MPC8xx_INT_SCC4 (CPM_IRQ_OFFSET + CPMVEC_SCC4)
461#define MPC8xx_INT_SMC1 (CPM_IRQ_OFFSET + CPMVEC_SMC1)
462#define MPC8xx_INT_SMC2 (CPM_IRQ_OFFSET + CPMVEC_SMC2)
463
464/* The internal interrupts we can configure as we see fit.
465 * My personal preference is CPM at level 2, which puts it above the
466 * MBX PCI/ISA/IDE interrupts.
467 */
468#ifndef PIT_INTERRUPT
469#define PIT_INTERRUPT SIU_LEVEL0
470#endif
471#ifndef CPM_INTERRUPT
472#define CPM_INTERRUPT SIU_LEVEL2
473#endif
474#ifndef PCMCIA_INTERRUPT
475#define PCMCIA_INTERRUPT SIU_LEVEL6
476#endif
477#ifndef DEC_INTERRUPT
478#define DEC_INTERRUPT SIU_LEVEL7
479#endif
480
481/* Some internal interrupt registers use an 8-bit mask for the interrupt
482 * level instead of a number.
483 */
484#define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
485
486#else /* CONFIG_40x + CONFIG_8xx */
487/*
488 * this is the # irq's for all ppc arch's (pmac/chrp/prep)
489 * so it is the max of them all
490 */
491#define NR_IRQS 256
492#define __DO_IRQ_CANON 1
493
494#ifndef CONFIG_8260
495
496#define NUM_8259_INTERRUPTS 16
497
498#else /* CONFIG_8260 */
499
500/* The 8260 has an internal interrupt controller with a maximum of
501 * 64 IRQs. We will use NR_IRQs from above since it is large enough.
502 * Don't be confused by the 8260 documentation where they list an
503 * "interrupt number" and "interrupt vector". We are only interested
504 * in the interrupt vector. There are "reserved" holes where the
505 * vector number increases, but the interrupt number in the table does not.
506 * (Document errata updates have fixed this...make sure you have up to
507 * date processor documentation -- Dan).
508 */
509
510#ifndef CPM_IRQ_OFFSET
511#define CPM_IRQ_OFFSET 0
512#endif
513
514#define NR_CPM_INTS 64
515
516#define SIU_INT_ERROR ((uint)0x00 + CPM_IRQ_OFFSET)
517#define SIU_INT_I2C ((uint)0x01 + CPM_IRQ_OFFSET)
518#define SIU_INT_SPI ((uint)0x02 + CPM_IRQ_OFFSET)
519#define SIU_INT_RISC ((uint)0x03 + CPM_IRQ_OFFSET)
520#define SIU_INT_SMC1 ((uint)0x04 + CPM_IRQ_OFFSET)
521#define SIU_INT_SMC2 ((uint)0x05 + CPM_IRQ_OFFSET)
522#define SIU_INT_IDMA1 ((uint)0x06 + CPM_IRQ_OFFSET)
523#define SIU_INT_IDMA2 ((uint)0x07 + CPM_IRQ_OFFSET)
524#define SIU_INT_IDMA3 ((uint)0x08 + CPM_IRQ_OFFSET)
525#define SIU_INT_IDMA4 ((uint)0x09 + CPM_IRQ_OFFSET)
526#define SIU_INT_SDMA ((uint)0x0a + CPM_IRQ_OFFSET)
527#define SIU_INT_USB ((uint)0x0b + CPM_IRQ_OFFSET)
528#define SIU_INT_TIMER1 ((uint)0x0c + CPM_IRQ_OFFSET)
529#define SIU_INT_TIMER2 ((uint)0x0d + CPM_IRQ_OFFSET)
530#define SIU_INT_TIMER3 ((uint)0x0e + CPM_IRQ_OFFSET)
531#define SIU_INT_TIMER4 ((uint)0x0f + CPM_IRQ_OFFSET)
532#define SIU_INT_TMCNT ((uint)0x10 + CPM_IRQ_OFFSET)
533#define SIU_INT_PIT ((uint)0x11 + CPM_IRQ_OFFSET)
534#define SIU_INT_PCI ((uint)0x12 + CPM_IRQ_OFFSET)
535#define SIU_INT_IRQ1 ((uint)0x13 + CPM_IRQ_OFFSET)
536#define SIU_INT_IRQ2 ((uint)0x14 + CPM_IRQ_OFFSET)
537#define SIU_INT_IRQ3 ((uint)0x15 + CPM_IRQ_OFFSET)
538#define SIU_INT_IRQ4 ((uint)0x16 + CPM_IRQ_OFFSET)
539#define SIU_INT_IRQ5 ((uint)0x17 + CPM_IRQ_OFFSET)
540#define SIU_INT_IRQ6 ((uint)0x18 + CPM_IRQ_OFFSET)
541#define SIU_INT_IRQ7 ((uint)0x19 + CPM_IRQ_OFFSET)
542#define SIU_INT_FCC1 ((uint)0x20 + CPM_IRQ_OFFSET)
543#define SIU_INT_FCC2 ((uint)0x21 + CPM_IRQ_OFFSET)
544#define SIU_INT_FCC3 ((uint)0x22 + CPM_IRQ_OFFSET)
545#define SIU_INT_MCC1 ((uint)0x24 + CPM_IRQ_OFFSET)
546#define SIU_INT_MCC2 ((uint)0x25 + CPM_IRQ_OFFSET)
547#define SIU_INT_SCC1 ((uint)0x28 + CPM_IRQ_OFFSET)
548#define SIU_INT_SCC2 ((uint)0x29 + CPM_IRQ_OFFSET)
549#define SIU_INT_SCC3 ((uint)0x2a + CPM_IRQ_OFFSET)
550#define SIU_INT_SCC4 ((uint)0x2b + CPM_IRQ_OFFSET)
551#define SIU_INT_PC15 ((uint)0x30 + CPM_IRQ_OFFSET)
552#define SIU_INT_PC14 ((uint)0x31 + CPM_IRQ_OFFSET)
553#define SIU_INT_PC13 ((uint)0x32 + CPM_IRQ_OFFSET)
554#define SIU_INT_PC12 ((uint)0x33 + CPM_IRQ_OFFSET)
555#define SIU_INT_PC11 ((uint)0x34 + CPM_IRQ_OFFSET)
556#define SIU_INT_PC10 ((uint)0x35 + CPM_IRQ_OFFSET)
557#define SIU_INT_PC9 ((uint)0x36 + CPM_IRQ_OFFSET)
558#define SIU_INT_PC8 ((uint)0x37 + CPM_IRQ_OFFSET)
559#define SIU_INT_PC7 ((uint)0x38 + CPM_IRQ_OFFSET)
560#define SIU_INT_PC6 ((uint)0x39 + CPM_IRQ_OFFSET)
561#define SIU_INT_PC5 ((uint)0x3a + CPM_IRQ_OFFSET)
562#define SIU_INT_PC4 ((uint)0x3b + CPM_IRQ_OFFSET)
563#define SIU_INT_PC3 ((uint)0x3c + CPM_IRQ_OFFSET)
564#define SIU_INT_PC2 ((uint)0x3d + CPM_IRQ_OFFSET)
565#define SIU_INT_PC1 ((uint)0x3e + CPM_IRQ_OFFSET)
566#define SIU_INT_PC0 ((uint)0x3f + CPM_IRQ_OFFSET)
567
568#endif /* CONFIG_8260 */
569
570#endif /* Whatever way too big #ifdef */
571
572#define NR_MASK_WORDS ((NR_IRQS + 31) / 32)
573/* pedantic: these are long because they are used with set_bit --RR */
574extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
575
576/*
577 * Because many systems have two overlapping names spaces for
578 * interrupts (ISA and XICS for example), and the ISA interrupts
579 * have historically not been easy to renumber, we allow ISA
580 * interrupts to take values 0 - 15, and shift up the remaining
581 * interrupts by 0x10.
582 */
583#define NUM_ISA_INTERRUPTS 0x10
584extern int __irq_offset_value;
585
586static inline int irq_offset_up(int irq)
587{
588 return(irq + __irq_offset_value);
589}
590
591static inline int irq_offset_down(int irq)
592{
593 return(irq - __irq_offset_value);
594}
595
596static inline int irq_offset_value(void)
597{
598 return __irq_offset_value;
599}
600
601#ifdef __DO_IRQ_CANON
602extern int ppc_do_canonicalize_irqs;
603#else
604#define ppc_do_canonicalize_irqs 0
605#endif
606
607static __inline__ int irq_canonicalize(int irq)
608{
609 if (ppc_do_canonicalize_irqs && irq == 2)
610 irq = 9;
611 return irq;
612}
613#endif /* CONFIG_PPC_MERGE */
614
615extern int distribute_irqs;
616
617struct irqaction;
618struct pt_regs;
619
620#define __ARCH_HAS_DO_SOFTIRQ
621
622#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
623/*
624 * Per-cpu stacks for handling critical, debug and machine check
625 * level interrupts.
626 */
627extern struct thread_info *critirq_ctx[NR_CPUS];
628extern struct thread_info *dbgirq_ctx[NR_CPUS];
629extern struct thread_info *mcheckirq_ctx[NR_CPUS];
630extern void exc_lvl_ctx_init(void);
631#else
632#define exc_lvl_ctx_init()
633#endif
634
635#ifdef CONFIG_IRQSTACKS
636/*
637 * Per-cpu stacks for handling hard and soft interrupts.
638 */
639extern struct thread_info *hardirq_ctx[NR_CPUS];
640extern struct thread_info *softirq_ctx[NR_CPUS];
641
642extern void irq_ctx_init(void);
643extern void call_do_softirq(struct thread_info *tp);
644extern int call_handle_irq(int irq, void *p1,
645 struct thread_info *tp, void *func);
646#else
647#define irq_ctx_init()
648
649#endif /* CONFIG_IRQSTACKS */
650
651extern void do_IRQ(struct pt_regs *regs);
652
653#endif /* _ASM_IRQ_H */
654#endif /* __KERNEL__ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-23 05:18:02 -0500