include/asm-powerpc/irq.h

   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
  26 extern 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  */
  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
  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
 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;
 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  */
 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
 144 extern 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  */
 162 extern 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  */
 173 extern 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  */
 185 extern 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  */
 195 extern 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  */
 208 extern 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  */
 216 extern 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  */
 227 extern 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  */
 238 extern 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  */
 248 extern 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
 261 extern 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  */
 276 extern 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  */
 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
 302  * of the of_irq_map_*() functions.
 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 -- */
 318
 319 /**
 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)
 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 */
 574 extern 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
 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
 607 static __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
 615 extern int distribute_irqs;
 616
 617 struct irqaction;
 618 struct pt_regs;
 619
 620 #define __ARCH_HAS_DO_SOFTIRQ
 621
 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);
 631 extern int call_handle_irq(int irq, void *p1,
 632                            struct thread_info *tp, void *func);
 633 #else
 634 #define irq_ctx_init()
 635
 636 #endif /* CONFIG_IRQSTACKS */
 637
 638 extern void do_IRQ(struct pt_regs *regs);
 639
 640 #endif /* _ASM_IRQ_H */
 641 #endif /* __KERNEL__ */