Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifdef __KERNEL__ |
Paul Mackerras | 1b92313 | 2005-10-10 22:54:57 +1000 | [diff] [blame] | 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | |
Paul Mackerras | 1b92313 | 2005-10-10 22:54:57 +1000 | [diff] [blame] | 12 | #include <linux/threads.h> |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 13 | #include <linux/list.h> |
| 14 | #include <linux/radix-tree.h> |
Paul Mackerras | 1b92313 | 2005-10-10 22:54:57 +1000 | [diff] [blame] | 15 | |
| 16 | #include <asm/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <asm/atomic.h> |
| 18 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 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 | |
| 26 | extern atomic_t ppc_n_lost_interrupts; |
| 27 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 28 | /* This number is used when no interrupt has been assigned */ |
| 29 | #define NO_IRQ (0) |
| 30 | |
| 31 | /* This is a special irq number to return from get_irq() to tell that |
| 32 | * no interrupt happened _and_ ignore it (don't count it as bad). Some |
| 33 | * platforms like iSeries rely on that. |
| 34 | */ |
| 35 | #define NO_IRQ_IGNORE ((unsigned int)-1) |
| 36 | |
Michael Ellerman | 551b81f | 2009-10-13 19:44:44 +0000 | [diff] [blame^] | 37 | /* Total number of virq in the platform */ |
| 38 | #define NR_IRQS CONFIG_NR_IRQS |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 39 | |
| 40 | /* Number of irqs reserved for the legacy controller */ |
| 41 | #define NUM_ISA_INTERRUPTS 16 |
| 42 | |
| 43 | /* This type is the placeholder for a hardware interrupt number. It has to |
| 44 | * be big enough to enclose whatever representation is used by a given |
| 45 | * platform. |
| 46 | */ |
| 47 | typedef unsigned long irq_hw_number_t; |
| 48 | |
| 49 | /* Interrupt controller "host" data structure. This could be defined as a |
| 50 | * irq domain controller. That is, it handles the mapping between hardware |
| 51 | * and virtual interrupt numbers for a given interrupt domain. The host |
| 52 | * structure is generally created by the PIC code for a given PIC instance |
| 53 | * (though a host can cover more than one PIC if they have a flat number |
| 54 | * model). It's the host callbacks that are responsible for setting the |
| 55 | * irq_chip on a given irq_desc after it's been mapped. |
| 56 | * |
| 57 | * The host code and data structures are fairly agnostic to the fact that |
| 58 | * we use an open firmware device-tree. We do have references to struct |
| 59 | * device_node in two places: in irq_find_host() to find the host matching |
| 60 | * a given interrupt controller node, and of course as an argument to its |
| 61 | * counterpart host->ops->match() callback. However, those are treated as |
| 62 | * generic pointers by the core and the fact that it's actually a device-node |
| 63 | * pointer is purely a convention between callers and implementation. This |
| 64 | * code could thus be used on other architectures by replacing those two |
| 65 | * by some sort of arch-specific void * "token" used to identify interrupt |
| 66 | * controllers. |
| 67 | */ |
| 68 | struct irq_host; |
| 69 | struct radix_tree_root; |
| 70 | |
| 71 | /* Functions below are provided by the host and called whenever a new mapping |
| 72 | * is created or an old mapping is disposed. The host can then proceed to |
| 73 | * whatever internal data structures management is required. It also needs |
| 74 | * to setup the irq_desc when returning from map(). |
| 75 | */ |
| 76 | struct irq_host_ops { |
| 77 | /* Match an interrupt controller device node to a host, returns |
| 78 | * 1 on a match |
| 79 | */ |
| 80 | int (*match)(struct irq_host *h, struct device_node *node); |
| 81 | |
| 82 | /* Create or update a mapping between a virtual irq number and a hw |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 83 | * irq number. This is called only once for a given mapping. |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 84 | */ |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 85 | int (*map)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 86 | |
| 87 | /* Dispose of such a mapping */ |
| 88 | void (*unmap)(struct irq_host *h, unsigned int virq); |
| 89 | |
Ishizaki Kou | acc900e | 2007-01-12 09:58:39 +0900 | [diff] [blame] | 90 | /* Update of such a mapping */ |
| 91 | void (*remap)(struct irq_host *h, unsigned int virq, irq_hw_number_t hw); |
| 92 | |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 93 | /* Translate device-tree interrupt specifier from raw format coming |
| 94 | * from the firmware to a irq_hw_number_t (interrupt line number) and |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 95 | * type (sense) that can be passed to set_irq_type(). In the absence |
| 96 | * of this callback, irq_create_of_mapping() and irq_of_parse_and_map() |
| 97 | * will return the hw number in the first cell and IRQ_TYPE_NONE for |
| 98 | * the type (which amount to keeping whatever default value the |
| 99 | * interrupt controller has for that line) |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 100 | */ |
| 101 | int (*xlate)(struct irq_host *h, struct device_node *ctrler, |
| 102 | u32 *intspec, unsigned int intsize, |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 103 | irq_hw_number_t *out_hwirq, unsigned int *out_type); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | struct irq_host { |
| 107 | struct list_head link; |
| 108 | |
| 109 | /* type of reverse mapping technique */ |
| 110 | unsigned int revmap_type; |
| 111 | #define IRQ_HOST_MAP_LEGACY 0 /* legacy 8259, gets irqs 1..15 */ |
| 112 | #define IRQ_HOST_MAP_NOMAP 1 /* no fast reverse mapping */ |
| 113 | #define IRQ_HOST_MAP_LINEAR 2 /* linear map of interrupts */ |
| 114 | #define IRQ_HOST_MAP_TREE 3 /* radix tree */ |
| 115 | union { |
| 116 | struct { |
| 117 | unsigned int size; |
| 118 | unsigned int *revmap; |
| 119 | } linear; |
| 120 | struct radix_tree_root tree; |
| 121 | } revmap_data; |
| 122 | struct irq_host_ops *ops; |
| 123 | void *host_data; |
| 124 | irq_hw_number_t inval_irq; |
Michael Ellerman | 52964f8 | 2007-08-28 18:47:54 +1000 | [diff] [blame] | 125 | |
| 126 | /* Optional device node pointer */ |
| 127 | struct device_node *of_node; |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 128 | }; |
| 129 | |
| 130 | /* The main irq map itself is an array of NR_IRQ entries containing the |
| 131 | * associate host and irq number. An entry with a host of NULL is free. |
| 132 | * An entry can be allocated if it's free, the allocator always then sets |
| 133 | * hwirq first to the host's invalid irq number and then fills ops. |
| 134 | */ |
| 135 | struct irq_map_entry { |
| 136 | irq_hw_number_t hwirq; |
| 137 | struct irq_host *host; |
| 138 | }; |
| 139 | |
| 140 | extern struct irq_map_entry irq_map[NR_IRQS]; |
| 141 | |
Olof Johansson | 35923f1 | 2007-06-04 14:47:04 +1000 | [diff] [blame] | 142 | extern irq_hw_number_t virq_to_hw(unsigned int virq); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 143 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 144 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 145 | * irq_alloc_host - Allocate a new irq_host data structure |
Michael Ellerman | 52964f8 | 2007-08-28 18:47:54 +1000 | [diff] [blame] | 146 | * @of_node: optional device-tree node of the interrupt controller |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 147 | * @revmap_type: type of reverse mapping to use |
| 148 | * @revmap_arg: for IRQ_HOST_MAP_LINEAR linear only: size of the map |
| 149 | * @ops: map/unmap host callbacks |
| 150 | * @inval_irq: provide a hw number in that host space that is always invalid |
| 151 | * |
| 152 | * Allocates and initialize and irq_host structure. Note that in the case of |
| 153 | * IRQ_HOST_MAP_LEGACY, the map() callback will be called before this returns |
| 154 | * for all legacy interrupts except 0 (which is always the invalid irq for |
| 155 | * a legacy controller). For a IRQ_HOST_MAP_LINEAR, the map is allocated by |
| 156 | * this call as well. For a IRQ_HOST_MAP_TREE, the radix tree will be allocated |
| 157 | * later during boot automatically (the reverse mapping will use the slow path |
| 158 | * until that happens). |
| 159 | */ |
Michael Ellerman | 52964f8 | 2007-08-28 18:47:54 +1000 | [diff] [blame] | 160 | extern struct irq_host *irq_alloc_host(struct device_node *of_node, |
| 161 | unsigned int revmap_type, |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 162 | unsigned int revmap_arg, |
| 163 | struct irq_host_ops *ops, |
| 164 | irq_hw_number_t inval_irq); |
| 165 | |
| 166 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 167 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 168 | * irq_find_host - Locates a host for a given device node |
| 169 | * @node: device-tree node of the interrupt controller |
| 170 | */ |
| 171 | extern struct irq_host *irq_find_host(struct device_node *node); |
| 172 | |
| 173 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 174 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 175 | * irq_set_default_host - Set a "default" host |
| 176 | * @host: default host pointer |
| 177 | * |
| 178 | * For convenience, it's possible to set a "default" host that will be used |
| 179 | * whenever NULL is passed to irq_create_mapping(). It makes life easier for |
| 180 | * platforms that want to manipulate a few hard coded interrupt numbers that |
| 181 | * aren't properly represented in the device-tree. |
| 182 | */ |
| 183 | extern void irq_set_default_host(struct irq_host *host); |
| 184 | |
| 185 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 186 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 187 | * irq_set_virq_count - Set the maximum number of virt irqs |
| 188 | * @count: number of linux virtual irqs, capped with NR_IRQS |
| 189 | * |
| 190 | * This is mainly for use by platforms like iSeries who want to program |
| 191 | * the virtual irq number in the controller to avoid the reverse mapping |
| 192 | */ |
| 193 | extern void irq_set_virq_count(unsigned int count); |
| 194 | |
| 195 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 196 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 197 | * irq_create_mapping - Map a hardware interrupt into linux virq space |
| 198 | * @host: host owning this hardware interrupt or NULL for default host |
| 199 | * @hwirq: hardware irq number in that host space |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 200 | * |
| 201 | * Only one mapping per hardware interrupt is permitted. Returns a linux |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 202 | * virq number. |
| 203 | * If the sense/trigger is to be specified, set_irq_type() should be called |
| 204 | * on the number returned from that call. |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 205 | */ |
| 206 | extern unsigned int irq_create_mapping(struct irq_host *host, |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 207 | irq_hw_number_t hwirq); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 208 | |
| 209 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 210 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 211 | * irq_dispose_mapping - Unmap an interrupt |
| 212 | * @virq: linux virq number of the interrupt to unmap |
| 213 | */ |
| 214 | extern void irq_dispose_mapping(unsigned int virq); |
| 215 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 216 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 217 | * irq_find_mapping - Find a linux virq from an hw irq number. |
| 218 | * @host: host owning this hardware interrupt |
| 219 | * @hwirq: hardware irq number in that host space |
| 220 | * |
| 221 | * This is a slow path, for use by generic code. It's expected that an |
| 222 | * irq controller implementation directly calls the appropriate low level |
| 223 | * mapping function. |
| 224 | */ |
| 225 | extern unsigned int irq_find_mapping(struct irq_host *host, |
| 226 | irq_hw_number_t hwirq); |
| 227 | |
Michael Ellerman | ee51de5 | 2007-06-04 23:00:00 +1000 | [diff] [blame] | 228 | /** |
| 229 | * irq_create_direct_mapping - Allocate a virq for direct mapping |
| 230 | * @host: host to allocate the virq for or NULL for default host |
| 231 | * |
| 232 | * This routine is used for irq controllers which can choose the hardware |
| 233 | * interrupt numbers they generate. In such a case it's simplest to use |
| 234 | * the linux virq as the hardware interrupt number. |
| 235 | */ |
| 236 | extern unsigned int irq_create_direct_mapping(struct irq_host *host); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 237 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 238 | /** |
Sebastien Dugue | 967e012 | 2008-09-04 22:37:07 +1000 | [diff] [blame] | 239 | * irq_radix_revmap_insert - Insert a hw irq to linux virq number mapping. |
| 240 | * @host: host owning this hardware interrupt |
| 241 | * @virq: linux irq number |
| 242 | * @hwirq: hardware irq number in that host space |
| 243 | * |
| 244 | * This is for use by irq controllers that use a radix tree reverse |
| 245 | * mapping for fast lookup. |
| 246 | */ |
| 247 | extern void irq_radix_revmap_insert(struct irq_host *host, unsigned int virq, |
| 248 | irq_hw_number_t hwirq); |
| 249 | |
| 250 | /** |
| 251 | * irq_radix_revmap_lookup - Find a linux virq from a hw irq number. |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 252 | * @host: host owning this hardware interrupt |
| 253 | * @hwirq: hardware irq number in that host space |
| 254 | * |
| 255 | * This is a fast path, for use by irq controller code that uses radix tree |
| 256 | * revmaps |
| 257 | */ |
Sebastien Dugue | 967e012 | 2008-09-04 22:37:07 +1000 | [diff] [blame] | 258 | extern unsigned int irq_radix_revmap_lookup(struct irq_host *host, |
| 259 | irq_hw_number_t hwirq); |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 260 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 261 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 262 | * irq_linear_revmap - Find a linux virq from a hw irq number. |
| 263 | * @host: host owning this hardware interrupt |
| 264 | * @hwirq: hardware irq number in that host space |
| 265 | * |
| 266 | * This is a fast path, for use by irq controller code that uses linear |
| 267 | * revmaps. It does fallback to the slow path if the revmap doesn't exist |
| 268 | * yet and will create the revmap entry with appropriate locking |
| 269 | */ |
| 270 | |
| 271 | extern unsigned int irq_linear_revmap(struct irq_host *host, |
| 272 | irq_hw_number_t hwirq); |
| 273 | |
| 274 | |
| 275 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 276 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 277 | * irq_alloc_virt - Allocate virtual irq numbers |
| 278 | * @host: host owning these new virtual irqs |
| 279 | * @count: number of consecutive numbers to allocate |
| 280 | * @hint: pass a hint number, the allocator will try to use a 1:1 mapping |
| 281 | * |
| 282 | * This is a low level function that is used internally by irq_create_mapping() |
| 283 | * and that can be used by some irq controllers implementations for things |
| 284 | * like allocating ranges of numbers for MSIs. The revmaps are left untouched. |
| 285 | */ |
| 286 | extern unsigned int irq_alloc_virt(struct irq_host *host, |
| 287 | unsigned int count, |
| 288 | unsigned int hint); |
| 289 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 290 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 291 | * irq_free_virt - Free virtual irq numbers |
| 292 | * @virq: virtual irq number of the first interrupt to free |
| 293 | * @count: number of interrupts to free |
| 294 | * |
| 295 | * This function is the opposite of irq_alloc_virt. It will not clear reverse |
| 296 | * maps, this should be done previously by unmap'ing the interrupt. In fact, |
| 297 | * all interrupts covered by the range being freed should have been unmapped |
| 298 | * prior to calling this. |
| 299 | */ |
| 300 | extern void irq_free_virt(unsigned int virq, unsigned int count); |
| 301 | |
| 302 | |
| 303 | /* -- OF helpers -- */ |
| 304 | |
Wolfram Sang | 8708d00 | 2009-09-10 12:47:20 +0000 | [diff] [blame] | 305 | /** |
| 306 | * irq_create_of_mapping - Map a hardware interrupt into linux virq space |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 307 | * @controller: Device node of the interrupt controller |
| 308 | * @inspec: Interrupt specifier from the device-tree |
| 309 | * @intsize: Size of the interrupt specifier from the device-tree |
| 310 | * |
| 311 | * This function is identical to irq_create_mapping except that it takes |
| 312 | * as input informations straight from the device-tree (typically the results |
Benjamin Herrenschmidt | 6e99e45 | 2006-07-10 04:44:42 -0700 | [diff] [blame] | 313 | * of the of_irq_map_*() functions. |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 314 | */ |
| 315 | extern unsigned int irq_create_of_mapping(struct device_node *controller, |
| 316 | u32 *intspec, unsigned int intsize); |
| 317 | |
Wolfram Sang | 8708d00 | 2009-09-10 12:47:20 +0000 | [diff] [blame] | 318 | /** |
| 319 | * irq_of_parse_and_map - Parse and Map an interrupt into linux virq space |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 320 | * @device: Device node of the device whose interrupt is to be mapped |
| 321 | * @index: Index of the interrupt to map |
| 322 | * |
| 323 | * This function is a wrapper that chains of_irq_map_one() and |
| 324 | * irq_create_of_mapping() to make things easier to callers |
| 325 | */ |
| 326 | extern unsigned int irq_of_parse_and_map(struct device_node *dev, int index); |
| 327 | |
| 328 | /* -- End OF helpers -- */ |
| 329 | |
Michael Ellerman | 40681b9 | 2006-08-02 11:13:50 +1000 | [diff] [blame] | 330 | /** |
Benjamin Herrenschmidt | 0ebfff1 | 2006-07-03 21:36:01 +1000 | [diff] [blame] | 331 | * irq_early_init - Init irq remapping subsystem |
| 332 | */ |
| 333 | extern void irq_early_init(void); |
| 334 | |
| 335 | static __inline__ int irq_canonicalize(int irq) |
| 336 | { |
| 337 | return irq; |
| 338 | } |
| 339 | |
Paul Mackerras | 1b92313 | 2005-10-10 22:54:57 +1000 | [diff] [blame] | 340 | extern int distribute_irqs; |
| 341 | |
| 342 | struct irqaction; |
| 343 | struct pt_regs; |
| 344 | |
Paul Mackerras | c6622f6 | 2006-02-24 10:06:59 +1100 | [diff] [blame] | 345 | #define __ARCH_HAS_DO_SOFTIRQ |
| 346 | |
Kumar Gala | bcf0b08 | 2008-04-30 03:49:55 -0500 | [diff] [blame] | 347 | #if defined(CONFIG_BOOKE) || defined(CONFIG_40x) |
| 348 | /* |
| 349 | * Per-cpu stacks for handling critical, debug and machine check |
| 350 | * level interrupts. |
| 351 | */ |
| 352 | extern struct thread_info *critirq_ctx[NR_CPUS]; |
| 353 | extern struct thread_info *dbgirq_ctx[NR_CPUS]; |
| 354 | extern struct thread_info *mcheckirq_ctx[NR_CPUS]; |
| 355 | extern void exc_lvl_ctx_init(void); |
| 356 | #else |
| 357 | #define exc_lvl_ctx_init() |
| 358 | #endif |
| 359 | |
Paul Mackerras | 1b92313 | 2005-10-10 22:54:57 +1000 | [diff] [blame] | 360 | #ifdef CONFIG_IRQSTACKS |
| 361 | /* |
| 362 | * Per-cpu stacks for handling hard and soft interrupts. |
| 363 | */ |
| 364 | extern struct thread_info *hardirq_ctx[NR_CPUS]; |
| 365 | extern struct thread_info *softirq_ctx[NR_CPUS]; |
| 366 | |
| 367 | extern void irq_ctx_init(void); |
| 368 | extern void call_do_softirq(struct thread_info *tp); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 369 | extern int call_handle_irq(int irq, void *p1, |
Benjamin Herrenschmidt | b9e5b4e | 2006-07-03 19:32:51 +1000 | [diff] [blame] | 370 | struct thread_info *tp, void *func); |
Paul Mackerras | 1b92313 | 2005-10-10 22:54:57 +1000 | [diff] [blame] | 371 | #else |
| 372 | #define irq_ctx_init() |
| 373 | |
| 374 | #endif /* CONFIG_IRQSTACKS */ |
| 375 | |
Paul Mackerras | f2783c1 | 2005-10-20 09:23:26 +1000 | [diff] [blame] | 376 | extern void do_IRQ(struct pt_regs *regs); |
| 377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | #endif /* _ASM_IRQ_H */ |
| 379 | #endif /* __KERNEL__ */ |