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/config.h>
  13 #include <linux/threads.h>
  14
  15 #include <asm/types.h>
  16 #include <asm/atomic.h>
  17
  18 /* this number is used when no interrupt has been assigned */
  19 #define NO_IRQ                  (-1)
  20
  21 /*
  22  * These constants are used for passing information about interrupt
  23  * signal polarity and level/edge sensing to the low-level PIC chip
  24  * drivers.
  25  */
  26 #define IRQ_SENSE_MASK          0x1
  27 #define IRQ_SENSE_LEVEL         0x1     /* interrupt on active level */
  28 #define IRQ_SENSE_EDGE          0x0     /* interrupt triggered by edge */
  29
  30 #define IRQ_POLARITY_MASK       0x2
  31 #define IRQ_POLARITY_POSITIVE   0x2     /* high level or low->high edge */
  32 #define IRQ_POLARITY_NEGATIVE   0x0     /* low level or high->low edge */
  33
  34 /*
  35  * IRQ line status macro IRQ_PER_CPU is used
  36  */
  37 #define ARCH_HAS_IRQ_PER_CPU
  38
  39 #define get_irq_desc(irq) (&irq_desc[(irq)])
  40
  41 /* Define a way to iterate across irqs. */
  42 #define for_each_irq(i) \
  43         for ((i) = 0; (i) < NR_IRQS; ++(i))
  44
  45 #ifdef CONFIG_PPC64
  46
  47 /*
  48  * Maximum number of interrupt sources that we can handle.
  49  */
  50 #define NR_IRQS         512
  51
  52 /* Interrupt numbers are virtual in case they are sparsely
  53  * distributed by the hardware.
  54  */
  55 extern unsigned int virt_irq_to_real_map[NR_IRQS];
  56
  57 /* Create a mapping for a real_irq if it doesn't already exist.
  58  * Return the virtual irq as a convenience.
  59  */
  60 int virt_irq_create_mapping(unsigned int real_irq);
  61 void virt_irq_init(void);
  62
  63 static inline unsigned int virt_irq_to_real(unsigned int virt_irq)
  64 {
  65         return virt_irq_to_real_map[virt_irq];
  66 }
  67
  68 extern unsigned int real_irq_to_virt_slowpath(unsigned int real_irq);
  69
  70 /*
  71  * List of interrupt controllers.
  72  */
  73 #define IC_INVALID    0
  74 #define IC_OPEN_PIC   1
  75 #define IC_PPC_XIC    2
  76 #define IC_CELL_PIC   3
  77 #define IC_ISERIES    4
  78
  79 extern u64 ppc64_interrupt_controller;
  80
  81 #else /* 32-bit */
  82
  83 #if defined(CONFIG_40x)
  84 #include <asm/ibm4xx.h>
  85
  86 #ifndef NR_BOARD_IRQS
  87 #define NR_BOARD_IRQS 0
  88 #endif
  89
  90 #ifndef UIC_WIDTH /* Number of interrupts per device */
  91 #define UIC_WIDTH 32
  92 #endif
  93
  94 #ifndef NR_UICS /* number  of UIC devices */
  95 #define NR_UICS 1
  96 #endif
  97
  98 #if defined (CONFIG_403)
  99 /*
 100  * The PowerPC 403 cores' Asynchronous Interrupt Controller (AIC) has
 101  * 32 possible interrupts, a majority of which are not implemented on
 102  * all cores. There are six configurable, external interrupt pins and
 103  * there are eight internal interrupts for the on-chip serial port
 104  * (SPU), DMA controller, and JTAG controller.
 105  *
 106  */
 107
 108 #define NR_AIC_IRQS 32
 109 #define NR_IRQS  (NR_AIC_IRQS + NR_BOARD_IRQS)
 110
 111 #elif !defined (CONFIG_403)
 112
 113 /*
 114  *  The PowerPC 405 cores' Universal Interrupt Controller (UIC) has 32
 115  * possible interrupts as well. There are seven, configurable external
 116  * interrupt pins and there are 17 internal interrupts for the on-chip
 117  * serial port, DMA controller, on-chip Ethernet controller, PCI, etc.
 118  *
 119  */
 120
 121
 122 #define NR_UIC_IRQS UIC_WIDTH
 123 #define NR_IRQS         ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
 124 #endif
 125
 126 #elif defined(CONFIG_44x)
 127 #include <asm/ibm44x.h>
 128
 129 #define NR_UIC_IRQS     32
 130 #define NR_IRQS         ((NR_UIC_IRQS * NR_UICS) + NR_BOARD_IRQS)
 131
 132 #elif defined(CONFIG_8xx)
 133
 134 /* Now include the board configuration specific associations.
 135 */
 136 #include <asm/mpc8xx.h>
 137
 138 /* The MPC8xx cores have 16 possible interrupts.  There are eight
 139  * possible level sensitive interrupts assigned and generated internally
 140  * from such devices as CPM, PCMCIA, RTC, PIT, TimeBase and Decrementer.
 141  * There are eight external interrupts (IRQs) that can be configured
 142  * as either level or edge sensitive.
 143  *
 144  * On some implementations, there is also the possibility of an 8259
 145  * through the PCI and PCI-ISA bridges.
 146  *
 147  * We are "flattening" the interrupt vectors of the cascaded CPM
 148  * and 8259 interrupt controllers so that we can uniquely identify
 149  * any interrupt source with a single integer.
 150  */
 151 #define NR_SIU_INTS     16
 152 #define NR_CPM_INTS     32
 153 #ifndef NR_8259_INTS
 154 #define NR_8259_INTS 0
 155 #endif
 156
 157 #define SIU_IRQ_OFFSET          0
 158 #define CPM_IRQ_OFFSET          (SIU_IRQ_OFFSET + NR_SIU_INTS)
 159 #define I8259_IRQ_OFFSET        (CPM_IRQ_OFFSET + NR_CPM_INTS)
 160
 161 #define NR_IRQS (NR_SIU_INTS + NR_CPM_INTS + NR_8259_INTS)
 162
 163 /* These values must be zero-based and map 1:1 with the SIU configuration.
 164  * They are used throughout the 8xx I/O subsystem to generate
 165  * interrupt masks, flags, and other control patterns.  This is why the
 166  * current kernel assumption of the 8259 as the base controller is such
 167  * a pain in the butt.
 168  */
 169 #define SIU_IRQ0        (0)     /* Highest priority */
 170 #define SIU_LEVEL0      (1)
 171 #define SIU_IRQ1        (2)
 172 #define SIU_LEVEL1      (3)
 173 #define SIU_IRQ2        (4)
 174 #define SIU_LEVEL2      (5)
 175 #define SIU_IRQ3        (6)
 176 #define SIU_LEVEL3      (7)
 177 #define SIU_IRQ4        (8)
 178 #define SIU_LEVEL4      (9)
 179 #define SIU_IRQ5        (10)
 180 #define SIU_LEVEL5      (11)
 181 #define SIU_IRQ6        (12)
 182 #define SIU_LEVEL6      (13)
 183 #define SIU_IRQ7        (14)
 184 #define SIU_LEVEL7      (15)
 185
 186 #define MPC8xx_INT_FEC1         SIU_LEVEL1
 187 #define MPC8xx_INT_FEC2         SIU_LEVEL3
 188
 189 #define MPC8xx_INT_SCC1         (CPM_IRQ_OFFSET + CPMVEC_SCC1)
 190 #define MPC8xx_INT_SCC2         (CPM_IRQ_OFFSET + CPMVEC_SCC2)
 191 #define MPC8xx_INT_SCC3         (CPM_IRQ_OFFSET + CPMVEC_SCC3)
 192 #define MPC8xx_INT_SCC4         (CPM_IRQ_OFFSET + CPMVEC_SCC4)
 193 #define MPC8xx_INT_SMC1         (CPM_IRQ_OFFSET + CPMVEC_SMC1)
 194 #define MPC8xx_INT_SMC2         (CPM_IRQ_OFFSET + CPMVEC_SMC2)
 195
 196 /* The internal interrupts we can configure as we see fit.
 197  * My personal preference is CPM at level 2, which puts it above the
 198  * MBX PCI/ISA/IDE interrupts.
 199  */
 200 #ifndef PIT_INTERRUPT
 201 #define PIT_INTERRUPT           SIU_LEVEL0
 202 #endif
 203 #ifndef CPM_INTERRUPT
 204 #define CPM_INTERRUPT           SIU_LEVEL2
 205 #endif
 206 #ifndef PCMCIA_INTERRUPT
 207 #define PCMCIA_INTERRUPT        SIU_LEVEL6
 208 #endif
 209 #ifndef DEC_INTERRUPT
 210 #define DEC_INTERRUPT           SIU_LEVEL7
 211 #endif
 212
 213 /* Some internal interrupt registers use an 8-bit mask for the interrupt
 214  * level instead of a number.
 215  */
 216 #define mk_int_int_mask(IL) (1 << (7 - (IL/2)))
 217
 218 #elif defined(CONFIG_83xx)
 219 #include <asm/mpc83xx.h>
 220
 221 #define NR_IRQS (NR_IPIC_INTS)
 222
 223 #elif defined(CONFIG_85xx)
 224 /* Now include the board configuration specific associations.
 225 */
 226 #include <asm/mpc85xx.h>
 227
 228 /* The MPC8548 openpic has 48 internal interrupts and 12 external
 229  * interrupts.
 230  *
 231  * We are "flattening" the interrupt vectors of the cascaded CPM
 232  * so that we can uniquely identify any interrupt source with a
 233  * single integer.
 234  */
 235 #define NR_CPM_INTS     64
 236 #define NR_EPIC_INTS    60
 237 #ifndef NR_8259_INTS
 238 #define NR_8259_INTS    0
 239 #endif
 240 #define NUM_8259_INTERRUPTS NR_8259_INTS
 241
 242 #ifndef CPM_IRQ_OFFSET
 243 #define CPM_IRQ_OFFSET  0
 244 #endif
 245
 246 #define NR_IRQS (NR_EPIC_INTS + NR_CPM_INTS + NR_8259_INTS)
 247
 248 /* Internal IRQs on MPC85xx OpenPIC */
 249
 250 #ifndef MPC85xx_OPENPIC_IRQ_OFFSET
 251 #ifdef CONFIG_CPM2
 252 #define MPC85xx_OPENPIC_IRQ_OFFSET      (CPM_IRQ_OFFSET + NR_CPM_INTS)
 253 #else
 254 #define MPC85xx_OPENPIC_IRQ_OFFSET      0
 255 #endif
 256 #endif
 257
 258 /* Not all of these exist on all MPC85xx implementations */
 259 #define MPC85xx_IRQ_L2CACHE     ( 0 + MPC85xx_OPENPIC_IRQ_OFFSET)
 260 #define MPC85xx_IRQ_ECM         ( 1 + MPC85xx_OPENPIC_IRQ_OFFSET)
 261 #define MPC85xx_IRQ_DDR         ( 2 + MPC85xx_OPENPIC_IRQ_OFFSET)
 262 #define MPC85xx_IRQ_LBIU        ( 3 + MPC85xx_OPENPIC_IRQ_OFFSET)
 263 #define MPC85xx_IRQ_DMA0        ( 4 + MPC85xx_OPENPIC_IRQ_OFFSET)
 264 #define MPC85xx_IRQ_DMA1        ( 5 + MPC85xx_OPENPIC_IRQ_OFFSET)
 265 #define MPC85xx_IRQ_DMA2        ( 6 + MPC85xx_OPENPIC_IRQ_OFFSET)
 266 #define MPC85xx_IRQ_DMA3        ( 7 + MPC85xx_OPENPIC_IRQ_OFFSET)
 267 #define MPC85xx_IRQ_PCI1        ( 8 + MPC85xx_OPENPIC_IRQ_OFFSET)
 268 #define MPC85xx_IRQ_PCI2        ( 9 + MPC85xx_OPENPIC_IRQ_OFFSET)
 269 #define MPC85xx_IRQ_RIO_ERROR   ( 9 + MPC85xx_OPENPIC_IRQ_OFFSET)
 270 #define MPC85xx_IRQ_RIO_BELL    (10 + MPC85xx_OPENPIC_IRQ_OFFSET)
 271 #define MPC85xx_IRQ_RIO_TX      (11 + MPC85xx_OPENPIC_IRQ_OFFSET)
 272 #define MPC85xx_IRQ_RIO_RX      (12 + MPC85xx_OPENPIC_IRQ_OFFSET)
 273 #define MPC85xx_IRQ_TSEC1_TX    (13 + MPC85xx_OPENPIC_IRQ_OFFSET)
 274 #define MPC85xx_IRQ_TSEC1_RX    (14 + MPC85xx_OPENPIC_IRQ_OFFSET)
 275 #define MPC85xx_IRQ_TSEC3_TX    (15 + MPC85xx_OPENPIC_IRQ_OFFSET)
 276 #define MPC85xx_IRQ_TSEC3_RX    (16 + MPC85xx_OPENPIC_IRQ_OFFSET)
 277 #define MPC85xx_IRQ_TSEC3_ERROR (17 + MPC85xx_OPENPIC_IRQ_OFFSET)
 278 #define MPC85xx_IRQ_TSEC1_ERROR (18 + MPC85xx_OPENPIC_IRQ_OFFSET)
 279 #define MPC85xx_IRQ_TSEC2_TX    (19 + MPC85xx_OPENPIC_IRQ_OFFSET)
 280 #define MPC85xx_IRQ_TSEC2_RX    (20 + MPC85xx_OPENPIC_IRQ_OFFSET)
 281 #define MPC85xx_IRQ_TSEC4_TX    (21 + MPC85xx_OPENPIC_IRQ_OFFSET)
 282 #define MPC85xx_IRQ_TSEC4_RX    (22 + MPC85xx_OPENPIC_IRQ_OFFSET)
 283 #define MPC85xx_IRQ_TSEC4_ERROR (23 + MPC85xx_OPENPIC_IRQ_OFFSET)
 284 #define MPC85xx_IRQ_TSEC2_ERROR (24 + MPC85xx_OPENPIC_IRQ_OFFSET)
 285 #define MPC85xx_IRQ_FEC         (25 + MPC85xx_OPENPIC_IRQ_OFFSET)
 286 #define MPC85xx_IRQ_DUART       (26 + MPC85xx_OPENPIC_IRQ_OFFSET)
 287 #define MPC85xx_IRQ_IIC1        (27 + MPC85xx_OPENPIC_IRQ_OFFSET)
 288 #define MPC85xx_IRQ_PERFMON     (28 + MPC85xx_OPENPIC_IRQ_OFFSET)
 289 #define MPC85xx_IRQ_SEC2        (29 + MPC85xx_OPENPIC_IRQ_OFFSET)
 290 #define MPC85xx_IRQ_CPM         (30 + MPC85xx_OPENPIC_IRQ_OFFSET)
 291
 292 /* The 12 external interrupt lines */
 293 #define MPC85xx_IRQ_EXT0        (48 + MPC85xx_OPENPIC_IRQ_OFFSET)
 294 #define MPC85xx_IRQ_EXT1        (49 + MPC85xx_OPENPIC_IRQ_OFFSET)
 295 #define MPC85xx_IRQ_EXT2        (50 + MPC85xx_OPENPIC_IRQ_OFFSET)
 296 #define MPC85xx_IRQ_EXT3        (51 + MPC85xx_OPENPIC_IRQ_OFFSET)
 297 #define MPC85xx_IRQ_EXT4        (52 + MPC85xx_OPENPIC_IRQ_OFFSET)
 298 #define MPC85xx_IRQ_EXT5        (53 + MPC85xx_OPENPIC_IRQ_OFFSET)
 299 #define MPC85xx_IRQ_EXT6        (54 + MPC85xx_OPENPIC_IRQ_OFFSET)
 300 #define MPC85xx_IRQ_EXT7        (55 + MPC85xx_OPENPIC_IRQ_OFFSET)
 301 #define MPC85xx_IRQ_EXT8        (56 + MPC85xx_OPENPIC_IRQ_OFFSET)
 302 #define MPC85xx_IRQ_EXT9        (57 + MPC85xx_OPENPIC_IRQ_OFFSET)
 303 #define MPC85xx_IRQ_EXT10       (58 + MPC85xx_OPENPIC_IRQ_OFFSET)
 304 #define MPC85xx_IRQ_EXT11       (59 + MPC85xx_OPENPIC_IRQ_OFFSET)
 305
 306 /* CPM related interrupts */
 307 #define SIU_INT_ERROR           ((uint)0x00+CPM_IRQ_OFFSET)
 308 #define SIU_INT_I2C             ((uint)0x01+CPM_IRQ_OFFSET)
 309 #define SIU_INT_SPI             ((uint)0x02+CPM_IRQ_OFFSET)
 310 #define SIU_INT_RISC            ((uint)0x03+CPM_IRQ_OFFSET)
 311 #define SIU_INT_SMC1            ((uint)0x04+CPM_IRQ_OFFSET)
 312 #define SIU_INT_SMC2            ((uint)0x05+CPM_IRQ_OFFSET)
 313 #define SIU_INT_USB             ((uint)0x0b+CPM_IRQ_OFFSET)
 314 #define SIU_INT_TIMER1          ((uint)0x0c+CPM_IRQ_OFFSET)
 315 #define SIU_INT_TIMER2          ((uint)0x0d+CPM_IRQ_OFFSET)
 316 #define SIU_INT_TIMER3          ((uint)0x0e+CPM_IRQ_OFFSET)
 317 #define SIU_INT_TIMER4          ((uint)0x0f+CPM_IRQ_OFFSET)
 318 #define SIU_INT_FCC1            ((uint)0x20+CPM_IRQ_OFFSET)
 319 #define SIU_INT_FCC2            ((uint)0x21+CPM_IRQ_OFFSET)
 320 #define SIU_INT_FCC3            ((uint)0x22+CPM_IRQ_OFFSET)
 321 #define SIU_INT_MCC1            ((uint)0x24+CPM_IRQ_OFFSET)
 322 #define SIU_INT_MCC2            ((uint)0x25+CPM_IRQ_OFFSET)
 323 #define SIU_INT_SCC1            ((uint)0x28+CPM_IRQ_OFFSET)
 324 #define SIU_INT_SCC2            ((uint)0x29+CPM_IRQ_OFFSET)
 325 #define SIU_INT_SCC3            ((uint)0x2a+CPM_IRQ_OFFSET)
 326 #define SIU_INT_SCC4            ((uint)0x2b+CPM_IRQ_OFFSET)
 327 #define SIU_INT_PC15            ((uint)0x30+CPM_IRQ_OFFSET)
 328 #define SIU_INT_PC14            ((uint)0x31+CPM_IRQ_OFFSET)
 329 #define SIU_INT_PC13            ((uint)0x32+CPM_IRQ_OFFSET)
 330 #define SIU_INT_PC12            ((uint)0x33+CPM_IRQ_OFFSET)
 331 #define SIU_INT_PC11            ((uint)0x34+CPM_IRQ_OFFSET)
 332 #define SIU_INT_PC10            ((uint)0x35+CPM_IRQ_OFFSET)
 333 #define SIU_INT_PC9             ((uint)0x36+CPM_IRQ_OFFSET)
 334 #define SIU_INT_PC8             ((uint)0x37+CPM_IRQ_OFFSET)
 335 #define SIU_INT_PC7             ((uint)0x38+CPM_IRQ_OFFSET)
 336 #define SIU_INT_PC6             ((uint)0x39+CPM_IRQ_OFFSET)
 337 #define SIU_INT_PC5             ((uint)0x3a+CPM_IRQ_OFFSET)
 338 #define SIU_INT_PC4             ((uint)0x3b+CPM_IRQ_OFFSET)
 339 #define SIU_INT_PC3             ((uint)0x3c+CPM_IRQ_OFFSET)
 340 #define SIU_INT_PC2             ((uint)0x3d+CPM_IRQ_OFFSET)
 341 #define SIU_INT_PC1             ((uint)0x3e+CPM_IRQ_OFFSET)
 342 #define SIU_INT_PC0             ((uint)0x3f+CPM_IRQ_OFFSET)
 343
 344 #else /* CONFIG_40x + CONFIG_8xx */
 345 /*
 346  * this is the # irq's for all ppc arch's (pmac/chrp/prep)
 347  * so it is the max of them all
 348  */
 349 #define NR_IRQS                 256
 350 #define __DO_IRQ_CANON  1
 351
 352 #ifndef CONFIG_8260
 353
 354 #define NUM_8259_INTERRUPTS     16
 355
 356 #else /* CONFIG_8260 */
 357
 358 /* The 8260 has an internal interrupt controller with a maximum of
 359  * 64 IRQs.  We will use NR_IRQs from above since it is large enough.
 360  * Don't be confused by the 8260 documentation where they list an
 361  * "interrupt number" and "interrupt vector".  We are only interested
 362  * in the interrupt vector.  There are "reserved" holes where the
 363  * vector number increases, but the interrupt number in the table does not.
 364  * (Document errata updates have fixed this...make sure you have up to
 365  * date processor documentation -- Dan).
 366  */
 367
 368 #ifndef CPM_IRQ_OFFSET
 369 #define CPM_IRQ_OFFSET  0
 370 #endif
 371
 372 #define NR_CPM_INTS     64
 373
 374 #define SIU_INT_ERROR           ((uint)0x00 + CPM_IRQ_OFFSET)
 375 #define SIU_INT_I2C             ((uint)0x01 + CPM_IRQ_OFFSET)
 376 #define SIU_INT_SPI             ((uint)0x02 + CPM_IRQ_OFFSET)
 377 #define SIU_INT_RISC            ((uint)0x03 + CPM_IRQ_OFFSET)
 378 #define SIU_INT_SMC1            ((uint)0x04 + CPM_IRQ_OFFSET)
 379 #define SIU_INT_SMC2            ((uint)0x05 + CPM_IRQ_OFFSET)
 380 #define SIU_INT_IDMA1           ((uint)0x06 + CPM_IRQ_OFFSET)
 381 #define SIU_INT_IDMA2           ((uint)0x07 + CPM_IRQ_OFFSET)
 382 #define SIU_INT_IDMA3           ((uint)0x08 + CPM_IRQ_OFFSET)
 383 #define SIU_INT_IDMA4           ((uint)0x09 + CPM_IRQ_OFFSET)
 384 #define SIU_INT_SDMA            ((uint)0x0a + CPM_IRQ_OFFSET)
 385 #define SIU_INT_USB             ((uint)0x0b + CPM_IRQ_OFFSET)
 386 #define SIU_INT_TIMER1          ((uint)0x0c + CPM_IRQ_OFFSET)
 387 #define SIU_INT_TIMER2          ((uint)0x0d + CPM_IRQ_OFFSET)
 388 #define SIU_INT_TIMER3          ((uint)0x0e + CPM_IRQ_OFFSET)
 389 #define SIU_INT_TIMER4          ((uint)0x0f + CPM_IRQ_OFFSET)
 390 #define SIU_INT_TMCNT           ((uint)0x10 + CPM_IRQ_OFFSET)
 391 #define SIU_INT_PIT             ((uint)0x11 + CPM_IRQ_OFFSET)
 392 #define SIU_INT_IRQ1            ((uint)0x13 + CPM_IRQ_OFFSET)
 393 #define SIU_INT_IRQ2            ((uint)0x14 + CPM_IRQ_OFFSET)
 394 #define SIU_INT_IRQ3            ((uint)0x15 + CPM_IRQ_OFFSET)
 395 #define SIU_INT_IRQ4            ((uint)0x16 + CPM_IRQ_OFFSET)
 396 #define SIU_INT_IRQ5            ((uint)0x17 + CPM_IRQ_OFFSET)
 397 #define SIU_INT_IRQ6            ((uint)0x18 + CPM_IRQ_OFFSET)
 398 #define SIU_INT_IRQ7            ((uint)0x19 + CPM_IRQ_OFFSET)
 399 #define SIU_INT_FCC1            ((uint)0x20 + CPM_IRQ_OFFSET)
 400 #define SIU_INT_FCC2            ((uint)0x21 + CPM_IRQ_OFFSET)
 401 #define SIU_INT_FCC3            ((uint)0x22 + CPM_IRQ_OFFSET)
 402 #define SIU_INT_MCC1            ((uint)0x24 + CPM_IRQ_OFFSET)
 403 #define SIU_INT_MCC2            ((uint)0x25 + CPM_IRQ_OFFSET)
 404 #define SIU_INT_SCC1            ((uint)0x28 + CPM_IRQ_OFFSET)
 405 #define SIU_INT_SCC2            ((uint)0x29 + CPM_IRQ_OFFSET)
 406 #define SIU_INT_SCC3            ((uint)0x2a + CPM_IRQ_OFFSET)
 407 #define SIU_INT_SCC4            ((uint)0x2b + CPM_IRQ_OFFSET)
 408 #define SIU_INT_PC15            ((uint)0x30 + CPM_IRQ_OFFSET)
 409 #define SIU_INT_PC14            ((uint)0x31 + CPM_IRQ_OFFSET)
 410 #define SIU_INT_PC13            ((uint)0x32 + CPM_IRQ_OFFSET)
 411 #define SIU_INT_PC12            ((uint)0x33 + CPM_IRQ_OFFSET)
 412 #define SIU_INT_PC11            ((uint)0x34 + CPM_IRQ_OFFSET)
 413 #define SIU_INT_PC10            ((uint)0x35 + CPM_IRQ_OFFSET)
 414 #define SIU_INT_PC9             ((uint)0x36 + CPM_IRQ_OFFSET)
 415 #define SIU_INT_PC8             ((uint)0x37 + CPM_IRQ_OFFSET)
 416 #define SIU_INT_PC7             ((uint)0x38 + CPM_IRQ_OFFSET)
 417 #define SIU_INT_PC6             ((uint)0x39 + CPM_IRQ_OFFSET)
 418 #define SIU_INT_PC5             ((uint)0x3a + CPM_IRQ_OFFSET)
 419 #define SIU_INT_PC4             ((uint)0x3b + CPM_IRQ_OFFSET)
 420 #define SIU_INT_PC3             ((uint)0x3c + CPM_IRQ_OFFSET)
 421 #define SIU_INT_PC2             ((uint)0x3d + CPM_IRQ_OFFSET)
 422 #define SIU_INT_PC1             ((uint)0x3e + CPM_IRQ_OFFSET)
 423 #define SIU_INT_PC0             ((uint)0x3f + CPM_IRQ_OFFSET)
 424
 425 #endif /* CONFIG_8260 */
 426
 427 #endif
 428
 429 #define NR_MASK_WORDS   ((NR_IRQS + 31) / 32)
 430 /* pedantic: these are long because they are used with set_bit --RR */
 431 extern unsigned long ppc_cached_irq_mask[NR_MASK_WORDS];
 432 extern unsigned long ppc_lost_interrupts[NR_MASK_WORDS];
 433 extern atomic_t ppc_n_lost_interrupts;
 434
 435 #define virt_irq_create_mapping(x)      (x)
 436
 437 #endif
 438
 439 /*
 440  * Because many systems have two overlapping names spaces for
 441  * interrupts (ISA and XICS for example), and the ISA interrupts
 442  * have historically not been easy to renumber, we allow ISA
 443  * interrupts to take values 0 - 15, and shift up the remaining
 444  * interrupts by 0x10.
 445  */
 446 #define NUM_ISA_INTERRUPTS      0x10
 447 extern int __irq_offset_value;
 448
 449 static inline int irq_offset_up(int irq)
 450 {
 451         return(irq + __irq_offset_value);
 452 }
 453
 454 static inline int irq_offset_down(int irq)
 455 {
 456         return(irq - __irq_offset_value);
 457 }
 458
 459 static inline int irq_offset_value(void)
 460 {
 461         return __irq_offset_value;
 462 }
 463
 464 #ifdef __DO_IRQ_CANON
 465 extern int ppc_do_canonicalize_irqs;
 466 #else
 467 #define ppc_do_canonicalize_irqs        0
 468 #endif
 469
 470 static __inline__ int irq_canonicalize(int irq)
 471 {
 472         if (ppc_do_canonicalize_irqs && irq == 2)
 473                 irq = 9;
 474         return irq;
 475 }
 476
 477 extern int distribute_irqs;
 478
 479 struct irqaction;
 480 struct pt_regs;
 481
 482 #ifdef CONFIG_IRQSTACKS
 483 /*
 484  * Per-cpu stacks for handling hard and soft interrupts.
 485  */
 486 extern struct thread_info *hardirq_ctx[NR_CPUS];
 487 extern struct thread_info *softirq_ctx[NR_CPUS];
 488
 489 extern void irq_ctx_init(void);
 490 extern void call_do_softirq(struct thread_info *tp);
 491 extern int call_handle_IRQ_event(int irq, struct pt_regs *regs,
 492                         struct irqaction *action, struct thread_info *tp);
 493
 494 #define __ARCH_HAS_DO_SOFTIRQ
 495
 496 #else
 497 #define irq_ctx_init()
 498
 499 #endif /* CONFIG_IRQSTACKS */
 500
 501 extern void do_IRQ(struct pt_regs *regs);
 502
 503 #endif /* _ASM_IRQ_H */
 504 #endif /* __KERNEL__ */