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1da177e4 | 1 | #ifdef __KERNEL__ |
1b92313d PM |
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 | */ | |
1da177e4 | 11 | |
1b92313d | 12 | #include <linux/threads.h> |
0ebfff14 BH |
13 | #include <linux/list.h> |
14 | #include <linux/radix-tree.h> | |
1b92313d PM |
15 | |
16 | #include <asm/types.h> | |
1da177e4 LT |
17 | #include <asm/atomic.h> |
18 | ||
1da177e4 | 19 | |
b671ad2b KG |
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 | ||
0ebfff14 | 26 | extern atomic_t ppc_n_lost_interrupts; |
1b92313d | 27 | |
0ebfff14 BH |
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. | |
1b92313d | 36 | */ |
0ebfff14 BH |
37 | #define NO_IRQ_IGNORE ((unsigned int)-1) |
38 | ||
39 | /* Total number of virq in the platform (make it a CONFIG_* option ? */ | |
1b92313d PM |
40 | #define NR_IRQS 512 |
41 | ||
0ebfff14 BH |
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 | */ | |
49 | typedef 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 | */ | |
70 | struct irq_host; | |
71 | struct 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 | */ | |
78 | struct 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 | |
6e99e458 | 85 | * irq number. This is called only once for a given mapping. |
0ebfff14 | 86 | */ |
6e99e458 | 87 | int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); |
0ebfff14 BH |
88 | |
89 | /* Dispose of such a mapping */ | |
90 | void (*unmap)(struct irq_host *h, unsigned int virq); | |
91 | ||
acc900ef IK |
92 | /* Update of such a mapping */ |
93 | void (*remap)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); | |
94 | ||
0ebfff14 BH |
95 | /* Translate device-tree interrupt specifier from raw format coming |
96 | * from the firmware to a irq_hw_number_t (interrupt line number) and | |
6e99e458 BH |
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) | |
0ebfff14 BH |
102 | */ |
103 | int (*xlate)(struct irq_host *h, struct device_node *ctrler, | |
104 | u32 *intspec, unsigned int intsize, | |
6e99e458 | 105 | irq_hw_number_t *out_hwirq, unsigned int *out_type); |
0ebfff14 BH |
106 | }; |
107 | ||
108 | struct 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; | |
52964f87 ME |
127 | |
128 | /* Optional device node pointer */ | |
129 | struct device_node *of_node; | |
0ebfff14 BH |
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 | */ | |
137 | struct irq_map_entry { | |
138 | irq_hw_number_t hwirq; | |
139 | struct irq_host *host; | |
140 | }; | |
141 | ||
142 | extern struct irq_map_entry irq_map[NR_IRQS]; | |
143 | ||
35923f12 | 144 | extern irq_hw_number_t virq_to_hw(unsigned int virq); |
0ebfff14 | 145 | |
40681b95 | 146 | /** |
0ebfff14 | 147 | * irq_alloc_host - Allocate a new irq_host data structure |
52964f87 | 148 | * @of_node: optional device-tree node of the interrupt controller |
0ebfff14 BH |
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 | */ | |
52964f87 ME |
162 | extern struct irq_host *irq_alloc_host(struct device_node *of_node, |
163 | unsigned int revmap_type, | |
0ebfff14 BH |
164 | unsigned int revmap_arg, |
165 | struct irq_host_ops *ops, | |
166 | irq_hw_number_t inval_irq); | |
167 | ||
168 | ||
40681b95 | 169 | /** |
0ebfff14 BH |
170 | * irq_find_host - Locates a host for a given device node |
171 | * @node: device-tree node of the interrupt controller | |
172 | */ | |
173 | extern struct irq_host *irq_find_host(struct device_node *node); | |
174 | ||
175 | ||
40681b95 | 176 | /** |
0ebfff14 BH |
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 | */ | |
185 | extern void irq_set_default_host(struct irq_host *host); | |
186 | ||
187 | ||
40681b95 | 188 | /** |
0ebfff14 BH |
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 | */ | |
195 | extern void irq_set_virq_count(unsigned int count); | |
196 | ||
197 | ||
40681b95 | 198 | /** |
0ebfff14 BH |
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 | |
0ebfff14 BH |
202 | * |
203 | * Only one mapping per hardware interrupt is permitted. Returns a linux | |
6e99e458 BH |
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. | |
0ebfff14 BH |
207 | */ |
208 | extern unsigned int irq_create_mapping(struct irq_host *host, | |
6e99e458 | 209 | irq_hw_number_t hwirq); |
0ebfff14 BH |
210 | |
211 | ||
40681b95 | 212 | /** |
0ebfff14 BH |
213 | * irq_dispose_mapping - Unmap an interrupt |
214 | * @virq: linux virq number of the interrupt to unmap | |
1b92313d | 215 | */ |
0ebfff14 | 216 | extern void irq_dispose_mapping(unsigned int virq); |
1b92313d | 217 | |
40681b95 | 218 | /** |
0ebfff14 BH |
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. | |
7d01c880 | 226 | */ |
0ebfff14 BH |
227 | extern unsigned int irq_find_mapping(struct irq_host *host, |
228 | irq_hw_number_t hwirq); | |
7d01c880 | 229 | |
ee51de56 ME |
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 | */ | |
238 | extern unsigned int irq_create_direct_mapping(struct irq_host *host); | |
0ebfff14 | 239 | |
40681b95 | 240 | /** |
0ebfff14 BH |
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 | */ | |
248 | extern unsigned int irq_radix_revmap(struct irq_host *host, | |
249 | irq_hw_number_t hwirq); | |
250 | ||
40681b95 | 251 | /** |
0ebfff14 BH |
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 | ||
261 | extern unsigned int irq_linear_revmap(struct irq_host *host, | |
262 | irq_hw_number_t hwirq); | |
263 | ||
264 | ||
265 | ||
40681b95 | 266 | /** |
0ebfff14 BH |
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. | |
1b92313d | 275 | */ |
0ebfff14 BH |
276 | extern unsigned int irq_alloc_virt(struct irq_host *host, |
277 | unsigned int count, | |
278 | unsigned int hint); | |
279 | ||
40681b95 | 280 | /** |
0ebfff14 BH |
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 | */ | |
290 | extern 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 | |
6e99e458 | 302 | * of the of_irq_map_*() functions. |
0ebfff14 BH |
303 | */ |
304 | extern 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 | */ | |
315 | extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index); | |
316 | ||
317 | /* -- End OF helpers -- */ | |
1b92313d | 318 | |
40681b95 | 319 | /** |
0ebfff14 BH |
320 | * irq_early_init - Init irq remapping subsystem |
321 | */ | |
322 | extern void irq_early_init(void); | |
323 | ||
324 | static __inline__ int irq_canonicalize(int irq) | |
1b92313d | 325 | { |
0ebfff14 | 326 | return irq; |
1b92313d PM |
327 | } |
328 | ||
0ebfff14 BH |
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 | ||
1b92313d PM |
336 | |
337 | /* | |
0ebfff14 BH |
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. | |
1b92313d | 341 | */ |
0ebfff14 BH |
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 */ | |
1b92313d | 345 | |
0ebfff14 BH |
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 */ | |
1b92313d | 349 | |
1b92313d | 350 | |
1da177e4 LT |
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 | |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
514ccd4e VB |
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 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | |
1b92313d | 492 | #define __DO_IRQ_CANON 1 |
1da177e4 LT |
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) | |
8e8fff09 | 527 | #define SIU_INT_USB ((uint)0x0b + CPM_IRQ_OFFSET) |
1da177e4 LT |
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) | |
7f7fda04 | 534 | #define SIU_INT_PCI ((uint)0x12 + CPM_IRQ_OFFSET) |
1da177e4 LT |
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 | ||
0ebfff14 | 570 | #endif /* Whatever way too big #ifdef */ |
1b92313d PM |
571 | |
572 | #define NR_MASK_WORDS ((NR_IRQS + 31) / 32) | |
573 | /* pedantic: these are long because they are used with set_bit --RR */ | |
574 | extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS]; | |
1b92313d | 575 | |
1da177e4 | 576 | /* |
1b92313d PM |
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. | |
1da177e4 | 582 | */ |
1b92313d PM |
583 | #define NUM_ISA_INTERRUPTS 0x10 |
584 | extern int __irq_offset_value; | |
585 | ||
586 | static inline int irq_offset_up(int irq) | |
587 | { | |
588 | return(irq + __irq_offset_value); | |
589 | } | |
590 | ||
591 | static inline int irq_offset_down(int irq) | |
592 | { | |
593 | return(irq - __irq_offset_value); | |
594 | } | |
595 | ||
596 | static inline int irq_offset_value(void) | |
597 | { | |
598 | return __irq_offset_value; | |
599 | } | |
600 | ||
601 | #ifdef __DO_IRQ_CANON | |
602 | extern int ppc_do_canonicalize_irqs; | |
603 | #else | |
604 | #define ppc_do_canonicalize_irqs 0 | |
605 | #endif | |
606 | ||
1da177e4 LT |
607 | static __inline__ int irq_canonicalize(int irq) |
608 | { | |
1b92313d PM |
609 | if (ppc_do_canonicalize_irqs && irq == 2) |
610 | irq = 9; | |
1da177e4 LT |
611 | return irq; |
612 | } | |
0ebfff14 | 613 | #endif /* CONFIG_PPC_MERGE */ |
1da177e4 | 614 | |
1b92313d | 615 | extern int distribute_irqs; |
1da177e4 | 616 | |
1b92313d PM |
617 | struct irqaction; |
618 | struct pt_regs; | |
619 | ||
c6622f63 PM |
620 | #define __ARCH_HAS_DO_SOFTIRQ |
621 | ||
1b92313d PM |
622 | #ifdef CONFIG_IRQSTACKS |
623 | /* | |
624 | * Per-cpu stacks for handling hard and soft interrupts. | |
625 | */ | |
626 | extern struct thread_info *hardirq_ctx[NR_CPUS]; | |
627 | extern struct thread_info *softirq_ctx[NR_CPUS]; | |
628 | ||
629 | extern void irq_ctx_init(void); | |
630 | extern void call_do_softirq(struct thread_info *tp); | |
7d12e780 | 631 | extern int call_handle_irq(int irq, void *p1, |
b9e5b4e6 | 632 | struct thread_info *tp, void *func); |
1b92313d PM |
633 | #else |
634 | #define irq_ctx_init() | |
635 | ||
636 | #endif /* CONFIG_IRQSTACKS */ | |
1da177e4 | 637 | |
f2783c15 PM |
638 | extern void do_IRQ(struct pt_regs *regs); |
639 | ||
1da177e4 LT |
640 | #endif /* _ASM_IRQ_H */ |
641 | #endif /* __KERNEL__ */ |