include/asm-ppc/irq.h

   1 #ifdef __KERNEL__
   2 #ifndef _ASM_IRQ_H
   3 #define _ASM_IRQ_H
   4
   5 #include <linux/config.h>
   6 #include <asm/machdep.h>                /* ppc_md */
   7 #include <asm/atomic.h>
   8
   9 /*
  10  * These constants are used for passing information about interrupt
  11  * signal polarity and level/edge sensing to the low-level PIC chip
  12  * drivers.
  13  */
  14 #define IRQ_SENSE_MASK          0x1
  15 #define IRQ_SENSE_LEVEL         0x1     /* interrupt on active level */
  16 #define IRQ_SENSE_EDGE          0x0     /* interrupt triggered by edge */
  17
  18 #define IRQ_POLARITY_MASK       0x2
  19 #define IRQ_POLARITY_POSITIVE   0x2     /* high level or low->high edge */
  20 #define IRQ_POLARITY_NEGATIVE   0x0     /* low level or high->low edge */
  21
  22 #if defined(CONFIG_40x)
  23 #include <asm/ibm4xx.h>
  24
  25 #ifndef NR_BOARD_IRQS
  26 #define NR_BOARD_IRQS 0
  27 #endif
  28
  29 #ifndef UIC_WIDTH /* Number of interrupts per device */
  30 #define UIC_WIDTH 32
  31 #endif
  32
  33 #ifndef NR_UICS /* number  of UIC devices */
  34 #define NR_UICS 1
  35 #endif
  36
  37 #if defined (CONFIG_403)
  38 /*
  39  * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has
  40  * 32 possible interrupts, a majority of which are not implemented on
  41  * all cores. There are six configurable, external interrupt pins and
  42  * there are eight internal interrupts for the on-chip serial port
  43  * (SPU), DMA controller, and JTAG controller.
  44  *
  45  */
  46
  47 #define NR_AIC_IRQS 32
  48 #define NR_IRQS  (NR_AIC_IRQS + NR_BOARD_IRQS)
  49
  50 #elif !defined (CONFIG_403)
  51
  52 /*
  53  *  The PowerPC 405 cores' Universal Interrupt Controller (UIC) has 32
  54  * possible interrupts as well. There are seven, configurable external
  55  * interrupt pins and there are 17 internal interrupts for the on-chip
  56  * serial port, DMA controller, on-chip Ethernet controller, PCI, etc.
  57  *
  58  */
  59
  60
  61 #define NR_UIC_IRQS UIC_WIDTH
  62 #define NR_IRQS         ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
  63 #endif
  64 static __inline__ int
  65 irq_canonicalize(int irq)
  66 {
  67         return (irq);
  68 }
  69
  70 #elif defined(CONFIG_44x)
  71 #include <asm/ibm44x.h>
  72
  73 #define NR_UIC_IRQS     32
  74 #define NR_IRQS         ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
  75
  76 static __inline__ int
  77 irq_canonicalize(int irq)
  78 {
  79         return (irq);
  80 }
  81
  82 #elif defined(CONFIG_8xx)
  83
  84 /* Now include the board configuration specific associations.
  85 */
  86 #include <asm/mpc8xx.h>
  87
  88 /* The MPC8xx cores have 16 possible interrupts.  There are eight
  89  * possible level sensitive interrupts assigned and generated internally
  90  * from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer.
  91  * There are eight external interrupts (IRQs) that can be configured
  92  * as either level or edge sensitive.
  93  *
  94  * On some implementations, there is also the possibility of an 8259
  95  * through the PCI and PCI-ISA bridges.
  96  *
  97  * We are "flattening" the interrupt vectors of the cascaded CPM
  98  * and 8259 interrupt controllers so that we can uniquely identify
  99  * any interrupt source with a single integer.
 100  */
 101 #define NR_SIU_INTS     16
 102 #define NR_CPM_INTS     32
 103 #ifndef NR_8259_INTS
 104 #define NR_8259_INTS 0
 105 #endif
 106
 107 #define SIU_IRQ_OFFSET          0
 108 #define CPM_IRQ_OFFSET          (SIU_IRQ_OFFSET + NR_SIU_INTS)
 109 #define I8259_IRQ_OFFSET        (CPM_IRQ_OFFSET + NR_CPM_INTS)
 110
 111 #define NR_IRQS (NR_SIU_INTS + NR_CPM_INTS + NR_8259_INTS)
 112
 113 /* These values must be zero-based and map 1:1 with the SIU configuration.
 114  * They are used throughout the 8xx I/O subsystem to generate
 115  * interrupt masks, flags, and other control patterns.  This is why the
 116  * current kernel assumption of the 8259 as the base controller is such
 117  * a pain in the butt.
 118  */
 119 #define SIU_IRQ0        (0)     /* Highest priority */
 120 #define SIU_LEVEL0      (1)
 121 #define SIU_IRQ1        (2)
 122 #define SIU_LEVEL1      (3)
 123 #define SIU_IRQ2        (4)
 124 #define SIU_LEVEL2      (5)
 125 #define SIU_IRQ3        (6)
 126 #define SIU_LEVEL3      (7)
 127 #define SIU_IRQ4        (8)
 128 #define SIU_LEVEL4      (9)
 129 #define SIU_IRQ5        (10)
 130 #define SIU_LEVEL5      (11)
 131 #define SIU_IRQ6        (12)
 132 #define SIU_LEVEL6      (13)
 133 #define SIU_IRQ7        (14)
 134 #define SIU_LEVEL7      (15)
 135
 136 /* The internal interrupts we can configure as we see fit.
 137  * My personal preference is CPM at level 2, which puts it above the
 138  * MBX PCI/ISA/IDE interrupts.
 139  */
 140 #ifndef PIT_INTERRUPT
 141 #define PIT_INTERRUPT           SIU_LEVEL0
 142 #endif
 143 #ifndef CPM_INTERRUPT
 144 #define CPM_INTERRUPT           SIU_LEVEL2
 145 #endif
 146 #ifndef PCMCIA_INTERRUPT
 147 #define PCMCIA_INTERRUPT        SIU_LEVEL6
 148 #endif
 149 #ifndef DEC_INTERRUPT
 150 #define DEC_INTERRUPT           SIU_LEVEL7
 151 #endif
 152
 153 /* Some internal interrupt registers use an 8-bit mask for the interrupt
 154  * level instead of a number.
 155  */
 156 #define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
 157
 158 /* always the same on 8xx -- Cort */
 159 static __inline__ int irq_canonicalize(int irq)
 160 {
 161         return irq;
 162 }
 163
 164 #elif defined(CONFIG_83xx)
 165 #include <asm/mpc83xx.h>
 166
 167 static __inline__ int irq_canonicalize(int irq)
 168 {
 169         return irq;
 170 }
 171
 172 #define NR_IRQS (NR_IPIC_INTS)
 173
 174 #elif defined(CONFIG_85xx)
 175 /* Now include the board configuration specific associations.
 176 */
 177 #include <asm/mpc85xx.h>
 178
 179 /* The MPC8548 openpic has 48 internal interrupts and 12 external
 180  * interrupts.
 181  *
 182  * We are "flattening" the interrupt vectors of the cascaded CPM
 183  * so that we can uniquely identify any interrupt source with a
 184  * single integer.
 185  */
 186 #define NR_CPM_INTS     64
 187 #define NR_EPIC_INTS    60
 188 #ifndef NR_8259_INTS
 189 #define NR_8259_INTS    0
 190 #endif
 191 #define NUM_8259_INTERRUPTS NR_8259_INTS
 192
 193 #ifndef CPM_IRQ_OFFSET
 194 #define CPM_IRQ_OFFSET  0
 195 #endif
 196
 197 #define NR_IRQS (NR_EPIC_INTS + NR_CPM_INTS + NR_8259_INTS)
 198
 199 /* Internal IRQs on MPC85xx OpenPIC */
 200
 201 #ifndef MPC85xx_OPENPIC_IRQ_OFFSET
 202 #ifdef CONFIG_CPM2
 203 #define MPC85xx_OPENPIC_IRQ_OFFSET      (CPM_IRQ_OFFSET + NR_CPM_INTS)
 204 #else
 205 #define MPC85xx_OPENPIC_IRQ_OFFSET      0
 206 #endif
 207 #endif
 208
 209 /* Not all of these exist on all MPC85xx implementations */
 210 #define MPC85xx_IRQ_L2CACHE     ( 0 + MPC85xx_OPENPIC_IRQ_OFFSET)
 211 #define MPC85xx_IRQ_ECM         ( 1 + MPC85xx_OPENPIC_IRQ_OFFSET)
 212 #define MPC85xx_IRQ_DDR         ( 2 + MPC85xx_OPENPIC_IRQ_OFFSET)
 213 #define MPC85xx_IRQ_LBIU        ( 3 + MPC85xx_OPENPIC_IRQ_OFFSET)
 214 #define MPC85xx_IRQ_DMA0        ( 4 + MPC85xx_OPENPIC_IRQ_OFFSET)
 215 #define MPC85xx_IRQ_DMA1        ( 5 + MPC85xx_OPENPIC_IRQ_OFFSET)
 216 #define MPC85xx_IRQ_DMA2        ( 6 + MPC85xx_OPENPIC_IRQ_OFFSET)
 217 #define MPC85xx_IRQ_DMA3        ( 7 + MPC85xx_OPENPIC_IRQ_OFFSET)
 218 #define MPC85xx_IRQ_PCI1        ( 8 + MPC85xx_OPENPIC_IRQ_OFFSET)
 219 #define MPC85xx_IRQ_PCI2        ( 9 + MPC85xx_OPENPIC_IRQ_OFFSET)
 220 #define MPC85xx_IRQ_RIO_ERROR   ( 9 + MPC85xx_OPENPIC_IRQ_OFFSET)
 221 #define MPC85xx_IRQ_RIO_BELL    (10 + MPC85xx_OPENPIC_IRQ_OFFSET)
 222 #define MPC85xx_IRQ_RIO_TX      (11 + MPC85xx_OPENPIC_IRQ_OFFSET)
 223 #define MPC85xx_IRQ_RIO_RX      (12 + MPC85xx_OPENPIC_IRQ_OFFSET)
 224 #define MPC85xx_IRQ_TSEC1_TX    (13 + MPC85xx_OPENPIC_IRQ_OFFSET)
 225 #define MPC85xx_IRQ_TSEC1_RX    (14 + MPC85xx_OPENPIC_IRQ_OFFSET)
 226 #define MPC85xx_IRQ_TSEC3_TX    (15 + MPC85xx_OPENPIC_IRQ_OFFSET)
 227 #define MPC85xx_IRQ_TSEC3_RX    (16 + MPC85xx_OPENPIC_IRQ_OFFSET)
 228 #define MPC85xx_IRQ_TSEC3_ERROR (17 + MPC85xx_OPENPIC_IRQ_OFFSET)
 229 #define MPC85xx_IRQ_TSEC1_ERROR (18 + MPC85xx_OPENPIC_IRQ_OFFSET)
 230 #define MPC85xx_IRQ_TSEC2_TX    (19 + MPC85xx_OPENPIC_IRQ_OFFSET)
 231 #define MPC85xx_IRQ_TSEC2_RX    (20 + MPC85xx_OPENPIC_IRQ_OFFSET)
 232 #define MPC85xx_IRQ_TSEC4_TX    (21 + MPC85xx_OPENPIC_IRQ_OFFSET)
 233 #define MPC85xx_IRQ_TSEC4_RX    (22 + MPC85xx_OPENPIC_IRQ_OFFSET)
 234 #define MPC85xx_IRQ_TSEC4_ERROR (23 + MPC85xx_OPENPIC_IRQ_OFFSET)
 235 #define MPC85xx_IRQ_TSEC2_ERROR (24 + MPC85xx_OPENPIC_IRQ_OFFSET)
 236 #define MPC85xx_IRQ_FEC         (25 + MPC85xx_OPENPIC_IRQ_OFFSET)
 237 #define MPC85xx_IRQ_DUART       (26 + MPC85xx_OPENPIC_IRQ_OFFSET)
 238 #define MPC85xx_IRQ_IIC1        (27 + MPC85xx_OPENPIC_IRQ_OFFSET)
 239 #define MPC85xx_IRQ_PERFMON     (28 + MPC85xx_OPENPIC_IRQ_OFFSET)
 240 #define MPC85xx_IRQ_SEC2        (29 + MPC85xx_OPENPIC_IRQ_OFFSET)
 241 #define MPC85xx_IRQ_CPM         (30 + MPC85xx_OPENPIC_IRQ_OFFSET)
 242
 243 /* The 12 external interrupt lines */
 244 #define MPC85xx_IRQ_EXT0        (48 + MPC85xx_OPENPIC_IRQ_OFFSET)
 245 #define MPC85xx_IRQ_EXT1        (49 + MPC85xx_OPENPIC_IRQ_OFFSET)
 246 #define MPC85xx_IRQ_EXT2        (50 + MPC85xx_OPENPIC_IRQ_OFFSET)
 247 #define MPC85xx_IRQ_EXT3        (51 + MPC85xx_OPENPIC_IRQ_OFFSET)
 248 #define MPC85xx_IRQ_EXT4        (52 + MPC85xx_OPENPIC_IRQ_OFFSET)
 249 #define MPC85xx_IRQ_EXT5        (53 + MPC85xx_OPENPIC_IRQ_OFFSET)
 250 #define MPC85xx_IRQ_EXT6        (54 + MPC85xx_OPENPIC_IRQ_OFFSET)
 251 #define MPC85xx_IRQ_EXT7        (55 + MPC85xx_OPENPIC_IRQ_OFFSET)
 252 #define MPC85xx_IRQ_EXT8        (56 + MPC85xx_OPENPIC_IRQ_OFFSET)
 253 #define MPC85xx_IRQ_EXT9        (57 + MPC85xx_OPENPIC_IRQ_OFFSET)
 254 #define MPC85xx_IRQ_EXT10       (58 + MPC85xx_OPENPIC_IRQ_OFFSET)
 255 #define MPC85xx_IRQ_EXT11       (59 + MPC85xx_OPENPIC_IRQ_OFFSET)
 256
 257 /* CPM related interrupts */
 258 #define SIU_INT_ERROR           ((uint)0x00+CPM_IRQ_OFFSET)
 259 #define SIU_INT_I2C             ((uint)0x01+CPM_IRQ_OFFSET)
 260 #define SIU_INT_SPI             ((uint)0x02+CPM_IRQ_OFFSET)
 261 #define SIU_INT_RISC            ((uint)0x03+CPM_IRQ_OFFSET)
 262 #define SIU_INT_SMC1            ((uint)0x04+CPM_IRQ_OFFSET)
 263 #define SIU_INT_SMC2            ((uint)0x05+CPM_IRQ_OFFSET)
 264 #define SIU_INT_USB             ((uint)0x0b+CPM_IRQ_OFFSET)
 265 #define SIU_INT_TIMER1          ((uint)0x0c+CPM_IRQ_OFFSET)
 266 #define SIU_INT_TIMER2          ((uint)0x0d+CPM_IRQ_OFFSET)
 267 #define SIU_INT_TIMER3          ((uint)0x0e+CPM_IRQ_OFFSET)
 268 #define SIU_INT_TIMER4          ((uint)0x0f+CPM_IRQ_OFFSET)
 269 #define SIU_INT_FCC1            ((uint)0x20+CPM_IRQ_OFFSET)
 270 #define SIU_INT_FCC2            ((uint)0x21+CPM_IRQ_OFFSET)
 271 #define SIU_INT_FCC3            ((uint)0x22+CPM_IRQ_OFFSET)
 272 #define SIU_INT_MCC1            ((uint)0x24+CPM_IRQ_OFFSET)
 273 #define SIU_INT_MCC2            ((uint)0x25+CPM_IRQ_OFFSET)
 274 #define SIU_INT_SCC1            ((uint)0x28+CPM_IRQ_OFFSET)
 275 #define SIU_INT_SCC2            ((uint)0x29+CPM_IRQ_OFFSET)
 276 #define SIU_INT_SCC3            ((uint)0x2a+CPM_IRQ_OFFSET)
 277 #define SIU_INT_SCC4            ((uint)0x2b+CPM_IRQ_OFFSET)
 278 #define SIU_INT_PC15            ((uint)0x30+CPM_IRQ_OFFSET)
 279 #define SIU_INT_PC14            ((uint)0x31+CPM_IRQ_OFFSET)
 280 #define SIU_INT_PC13            ((uint)0x32+CPM_IRQ_OFFSET)
 281 #define SIU_INT_PC12            ((uint)0x33+CPM_IRQ_OFFSET)
 282 #define SIU_INT_PC11            ((uint)0x34+CPM_IRQ_OFFSET)
 283 #define SIU_INT_PC10            ((uint)0x35+CPM_IRQ_OFFSET)
 284 #define SIU_INT_PC9             ((uint)0x36+CPM_IRQ_OFFSET)
 285 #define SIU_INT_PC8             ((uint)0x37+CPM_IRQ_OFFSET)
 286 #define SIU_INT_PC7             ((uint)0x38+CPM_IRQ_OFFSET)
 287 #define SIU_INT_PC6             ((uint)0x39+CPM_IRQ_OFFSET)
 288 #define SIU_INT_PC5             ((uint)0x3a+CPM_IRQ_OFFSET)
 289 #define SIU_INT_PC4             ((uint)0x3b+CPM_IRQ_OFFSET)
 290 #define SIU_INT_PC3             ((uint)0x3c+CPM_IRQ_OFFSET)
 291 #define SIU_INT_PC2             ((uint)0x3d+CPM_IRQ_OFFSET)
 292 #define SIU_INT_PC1             ((uint)0x3e+CPM_IRQ_OFFSET)
 293 #define SIU_INT_PC0             ((uint)0x3f+CPM_IRQ_OFFSET)
 294
 295 static __inline__ int irq_canonicalize(int irq)
 296 {
 297         return irq;
 298 }
 299
 300 #else /* CONFIG_40x + CONFIG_8xx */
 301 /*
 302  * this is the # irq's for all ppc arch's (pmac/chrp/prep)
 303  * so it is the max of them all
 304  */
 305 #define NR_IRQS                 256
 306
 307 #ifndef CONFIG_8260
 308
 309 #define NUM_8259_INTERRUPTS     16
 310
 311 #else /* CONFIG_8260 */
 312
 313 /* The 8260 has an internal interrupt controller with a maximum of
 314  * 64 IRQs.  We will use NR_IRQs from above since it is large enough.
 315  * Don't be confused by the 8260 documentation where they list an
 316  * "interrupt number" and "interrupt vector".  We are only interested
 317  * in the interrupt vector.  There are "reserved" holes where the
 318  * vector number increases, but the interrupt number in the table does not.
 319  * (Document errata updates have fixed this...make sure you have up to
 320  * date processor documentation -- Dan).
 321  */
 322
 323 #ifndef CPM_IRQ_OFFSET
 324 #define CPM_IRQ_OFFSET  0
 325 #endif
 326
 327 #define NR_CPM_INTS     64
 328
 329 #define SIU_INT_ERROR           ((uint)0x00 + CPM_IRQ_OFFSET)
 330 #define SIU_INT_I2C             ((uint)0x01 + CPM_IRQ_OFFSET)
 331 #define SIU_INT_SPI             ((uint)0x02 + CPM_IRQ_OFFSET)
 332 #define SIU_INT_RISC            ((uint)0x03 + CPM_IRQ_OFFSET)
 333 #define SIU_INT_SMC1            ((uint)0x04 + CPM_IRQ_OFFSET)
 334 #define SIU_INT_SMC2            ((uint)0x05 + CPM_IRQ_OFFSET)
 335 #define SIU_INT_IDMA1           ((uint)0x06 + CPM_IRQ_OFFSET)
 336 #define SIU_INT_IDMA2           ((uint)0x07 + CPM_IRQ_OFFSET)
 337 #define SIU_INT_IDMA3           ((uint)0x08 + CPM_IRQ_OFFSET)
 338 #define SIU_INT_IDMA4           ((uint)0x09 + CPM_IRQ_OFFSET)
 339 #define SIU_INT_SDMA            ((uint)0x0a + CPM_IRQ_OFFSET)
 340 #define SIU_INT_TIMER1          ((uint)0x0c + CPM_IRQ_OFFSET)
 341 #define SIU_INT_TIMER2          ((uint)0x0d + CPM_IRQ_OFFSET)
 342 #define SIU_INT_TIMER3          ((uint)0x0e + CPM_IRQ_OFFSET)
 343 #define SIU_INT_TIMER4          ((uint)0x0f + CPM_IRQ_OFFSET)
 344 #define SIU_INT_TMCNT           ((uint)0x10 + CPM_IRQ_OFFSET)
 345 #define SIU_INT_PIT             ((uint)0x11 + CPM_IRQ_OFFSET)
 346 #define SIU_INT_IRQ1            ((uint)0x13 + CPM_IRQ_OFFSET)
 347 #define SIU_INT_IRQ2            ((uint)0x14 + CPM_IRQ_OFFSET)
 348 #define SIU_INT_IRQ3            ((uint)0x15 + CPM_IRQ_OFFSET)
 349 #define SIU_INT_IRQ4            ((uint)0x16 + CPM_IRQ_OFFSET)
 350 #define SIU_INT_IRQ5            ((uint)0x17 + CPM_IRQ_OFFSET)
 351 #define SIU_INT_IRQ6            ((uint)0x18 + CPM_IRQ_OFFSET)
 352 #define SIU_INT_IRQ7            ((uint)0x19 + CPM_IRQ_OFFSET)
 353 #define SIU_INT_FCC1            ((uint)0x20 + CPM_IRQ_OFFSET)
 354 #define SIU_INT_FCC2            ((uint)0x21 + CPM_IRQ_OFFSET)
 355 #define SIU_INT_FCC3            ((uint)0x22 + CPM_IRQ_OFFSET)
 356 #define SIU_INT_MCC1            ((uint)0x24 + CPM_IRQ_OFFSET)
 357 #define SIU_INT_MCC2            ((uint)0x25 + CPM_IRQ_OFFSET)
 358 #define SIU_INT_SCC1            ((uint)0x28 + CPM_IRQ_OFFSET)
 359 #define SIU_INT_SCC2            ((uint)0x29 + CPM_IRQ_OFFSET)
 360 #define SIU_INT_SCC3            ((uint)0x2a + CPM_IRQ_OFFSET)
 361 #define SIU_INT_SCC4            ((uint)0x2b + CPM_IRQ_OFFSET)
 362 #define SIU_INT_PC15            ((uint)0x30 + CPM_IRQ_OFFSET)
 363 #define SIU_INT_PC14            ((uint)0x31 + CPM_IRQ_OFFSET)
 364 #define SIU_INT_PC13            ((uint)0x32 + CPM_IRQ_OFFSET)
 365 #define SIU_INT_PC12            ((uint)0x33 + CPM_IRQ_OFFSET)
 366 #define SIU_INT_PC11            ((uint)0x34 + CPM_IRQ_OFFSET)
 367 #define SIU_INT_PC10            ((uint)0x35 + CPM_IRQ_OFFSET)
 368 #define SIU_INT_PC9             ((uint)0x36 + CPM_IRQ_OFFSET)
 369 #define SIU_INT_PC8             ((uint)0x37 + CPM_IRQ_OFFSET)
 370 #define SIU_INT_PC7             ((uint)0x38 + CPM_IRQ_OFFSET)
 371 #define SIU_INT_PC6             ((uint)0x39 + CPM_IRQ_OFFSET)
 372 #define SIU_INT_PC5             ((uint)0x3a + CPM_IRQ_OFFSET)
 373 #define SIU_INT_PC4             ((uint)0x3b + CPM_IRQ_OFFSET)
 374 #define SIU_INT_PC3             ((uint)0x3c + CPM_IRQ_OFFSET)
 375 #define SIU_INT_PC2             ((uint)0x3d + CPM_IRQ_OFFSET)
 376 #define SIU_INT_PC1             ((uint)0x3e + CPM_IRQ_OFFSET)
 377 #define SIU_INT_PC0             ((uint)0x3f + CPM_IRQ_OFFSET)
 378
 379 #endif /* CONFIG_8260 */
 380
 381 /*
 382  * This gets called from serial.c, which is now used on
 383  * powermacs as well as prep/chrp boxes.
 384  * Prep and chrp both have cascaded 8259 PICs.
 385  */
 386 static __inline__ int irq_canonicalize(int irq)
 387 {
 388         if (ppc_md.irq_canonicalize)
 389                 return ppc_md.irq_canonicalize(irq);
 390         return irq;
 391 }
 392
 393 #endif
 394
 395 #define NR_MASK_WORDS   ((NR_IRQS + 31) / 32)
 396 /* pedantic: these are long because they are used with set_bit --RR */
 397 extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
 398 extern unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
 399 extern atomic_t ppc_n_lost_interrupts;
 400
 401 struct irqaction;
 402 struct pt_regs;
 403 int handle_IRQ_event(unsigned int, struct pt_regs *, struct irqaction *);
 404
 405 #endif /* _ASM_IRQ_H */
 406 #endif /* __KERNEL__ */