arch/blackfin/mach-common/ints-priority.c

   1 /*
   2  * Set up the interrupt priorities
   3  *
   4  * Copyright  2004-2009 Analog Devices Inc.
   5  *                 2003 Bas Vermeulen <bas@buyways.nl>
   6  *                 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca>
   7  *            2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca>
   8  *                 1999 D. Jeff Dionne <jeff@uclinux.org>
   9  *                 1996 Roman Zippel
  10  *
  11  * Licensed under the GPL-2
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel_stat.h>
  16 #include <linux/seq_file.h>
  17 #include <linux/irq.h>
  18 #include <linux/sched.h>
  19 #include <linux/sched/debug.h>
  20 #include <linux/syscore_ops.h>
  21 #include <linux/gpio.h>
  22 #include <asm/delay.h>
  23 #ifdef CONFIG_IPIPE
  24 #include <linux/ipipe.h>
  25 #endif
  26 #include <asm/traps.h>
  27 #include <asm/blackfin.h>
  28 #include <asm/irq_handler.h>
  29 #include <asm/dpmc.h>
  30 #include <asm/traps.h>
  31
  32 /*
  33  * NOTES:
  34  * - we have separated the physical Hardware interrupt from the
  35  * levels that the LINUX kernel sees (see the description in irq.h)
  36  * -
  37  */
  38
  39 #ifndef CONFIG_SMP
  40 /* Initialize this to an actual value to force it into the .data
  41  * section so that we know it is properly initialized at entry into
  42  * the kernel but before bss is initialized to zero (which is where
  43  * it would live otherwise).  The 0x1f magic represents the IRQs we
  44  * cannot actually mask out in hardware.
  45  */
  46 unsigned long bfin_irq_flags = 0x1f;
  47 EXPORT_SYMBOL(bfin_irq_flags);
  48 #endif
  49
  50 #ifdef CONFIG_PM
  51 unsigned long bfin_sic_iwr[3];  /* Up to 3 SIC_IWRx registers */
  52 unsigned vr_wakeup;
  53 #endif
  54
  55 #ifndef SEC_GCTL
  56 static struct ivgx {
  57         /* irq number for request_irq, available in mach-bf5xx/irq.h */
  58         unsigned int irqno;
  59         /* corresponding bit in the SIC_ISR register */
  60         unsigned int isrflag;
  61 } ivg_table[NR_PERI_INTS];
  62
  63 static struct ivg_slice {
  64         /* position of first irq in ivg_table for given ivg */
  65         struct ivgx *ifirst;
  66         struct ivgx *istop;
  67 } ivg7_13[IVG13 - IVG7 + 1];
  68
  69
  70 /*
  71  * Search SIC_IAR and fill tables with the irqvalues
  72  * and their positions in the SIC_ISR register.
  73  */
  74 static void __init search_IAR(void)
  75 {
  76         unsigned ivg, irq_pos = 0;
  77         for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) {
  78                 int irqN;
  79
  80                 ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos];
  81
  82                 for (irqN = 0; irqN < NR_PERI_INTS; irqN += 4) {
  83                         int irqn;
  84                         u32 iar =
  85                                 bfin_read32((unsigned long *)SIC_IAR0 +
  86 #if defined(CONFIG_BF51x) || defined(CONFIG_BF52x) || \
  87         defined(CONFIG_BF538) || defined(CONFIG_BF539)
  88                                 ((irqN % 32) >> 3) + ((irqN / 32) * ((SIC_IAR4 - SIC_IAR0) / 4))
  89 #else
  90                                 (irqN >> 3)
  91 #endif
  92                                 );
  93                         for (irqn = irqN; irqn < irqN + 4; ++irqn) {
  94                                 int iar_shift = (irqn & 7) * 4;
  95                                 if (ivg == (0xf & (iar >> iar_shift))) {
  96                                         ivg_table[irq_pos].irqno = IVG7 + irqn;
  97                                         ivg_table[irq_pos].isrflag = 1 << (irqn % 32);
  98                                         ivg7_13[ivg].istop++;
  99                                         irq_pos++;
 100                                 }
 101                         }
 102                 }
 103         }
 104 }
 105 #endif
 106
 107 /*
 108  * This is for core internal IRQs
 109  */
 110 void bfin_ack_noop(struct irq_data *d)
 111 {
 112         /* Dummy function.  */
 113 }
 114
 115 static void bfin_core_mask_irq(struct irq_data *d)
 116 {
 117         bfin_irq_flags &= ~(1 << d->irq);
 118         if (!hard_irqs_disabled())
 119                 hard_local_irq_enable();
 120 }
 121
 122 static void bfin_core_unmask_irq(struct irq_data *d)
 123 {
 124         bfin_irq_flags |= 1 << d->irq;
 125         /*
 126          * If interrupts are enabled, IMASK must contain the same value
 127          * as bfin_irq_flags.  Make sure that invariant holds.  If interrupts
 128          * are currently disabled we need not do anything; one of the
 129          * callers will take care of setting IMASK to the proper value
 130          * when reenabling interrupts.
 131          * local_irq_enable just does "STI bfin_irq_flags", so it's exactly
 132          * what we need.
 133          */
 134         if (!hard_irqs_disabled())
 135                 hard_local_irq_enable();
 136         return;
 137 }
 138
 139 #ifndef SEC_GCTL
 140 void bfin_internal_mask_irq(unsigned int irq)
 141 {
 142         unsigned long flags = hard_local_irq_save();
 143 #ifdef SIC_IMASK0
 144         unsigned mask_bank = BFIN_SYSIRQ(irq) / 32;
 145         unsigned mask_bit = BFIN_SYSIRQ(irq) % 32;
 146         bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) &
 147                         ~(1 << mask_bit));
 148 # if defined(CONFIG_SMP) || defined(CONFIG_ICC)
 149         bfin_write_SICB_IMASK(mask_bank, bfin_read_SICB_IMASK(mask_bank) &
 150                         ~(1 << mask_bit));
 151 # endif
 152 #else
 153         bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() &
 154                         ~(1 << BFIN_SYSIRQ(irq)));
 155 #endif /* end of SIC_IMASK0 */
 156         hard_local_irq_restore(flags);
 157 }
 158
 159 static void bfin_internal_mask_irq_chip(struct irq_data *d)
 160 {
 161         bfin_internal_mask_irq(d->irq);
 162 }
 163
 164 #ifdef CONFIG_SMP
 165 void bfin_internal_unmask_irq_affinity(unsigned int irq,
 166                 const struct cpumask *affinity)
 167 #else
 168 void bfin_internal_unmask_irq(unsigned int irq)
 169 #endif
 170 {
 171         unsigned long flags = hard_local_irq_save();
 172
 173 #ifdef SIC_IMASK0
 174         unsigned mask_bank = BFIN_SYSIRQ(irq) / 32;
 175         unsigned mask_bit = BFIN_SYSIRQ(irq) % 32;
 176 # ifdef CONFIG_SMP
 177         if (cpumask_test_cpu(0, affinity))
 178 # endif
 179                 bfin_write_SIC_IMASK(mask_bank,
 180                                 bfin_read_SIC_IMASK(mask_bank) |
 181                                 (1 << mask_bit));
 182 # ifdef CONFIG_SMP
 183         if (cpumask_test_cpu(1, affinity))
 184                 bfin_write_SICB_IMASK(mask_bank,
 185                                 bfin_read_SICB_IMASK(mask_bank) |
 186                                 (1 << mask_bit));
 187 # endif
 188 #else
 189         bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() |
 190                         (1 << BFIN_SYSIRQ(irq)));
 191 #endif
 192         hard_local_irq_restore(flags);
 193 }
 194
 195 #ifdef CONFIG_SMP
 196 static void bfin_internal_unmask_irq_chip(struct irq_data *d)
 197 {
 198         bfin_internal_unmask_irq_affinity(d->irq,
 199                                           irq_data_get_affinity_mask(d));
 200 }
 201
 202 static int bfin_internal_set_affinity(struct irq_data *d,
 203                                       const struct cpumask *mask, bool force)
 204 {
 205         bfin_internal_mask_irq(d->irq);
 206         bfin_internal_unmask_irq_affinity(d->irq, mask);
 207
 208         return 0;
 209 }
 210 #else
 211 static void bfin_internal_unmask_irq_chip(struct irq_data *d)
 212 {
 213         bfin_internal_unmask_irq(d->irq);
 214 }
 215 #endif
 216
 217 #if defined(CONFIG_PM)
 218 int bfin_internal_set_wake(unsigned int irq, unsigned int state)
 219 {
 220         u32 bank, bit, wakeup = 0;
 221         unsigned long flags;
 222         bank = BFIN_SYSIRQ(irq) / 32;
 223         bit = BFIN_SYSIRQ(irq) % 32;
 224
 225         switch (irq) {
 226 #ifdef IRQ_RTC
 227         case IRQ_RTC:
 228         wakeup |= WAKE;
 229         break;
 230 #endif
 231 #ifdef IRQ_CAN0_RX
 232         case IRQ_CAN0_RX:
 233         wakeup |= CANWE;
 234         break;
 235 #endif
 236 #ifdef IRQ_CAN1_RX
 237         case IRQ_CAN1_RX:
 238         wakeup |= CANWE;
 239         break;
 240 #endif
 241 #ifdef IRQ_USB_INT0
 242         case IRQ_USB_INT0:
 243         wakeup |= USBWE;
 244         break;
 245 #endif
 246 #ifdef CONFIG_BF54x
 247         case IRQ_CNT:
 248         wakeup |= ROTWE;
 249         break;
 250 #endif
 251         default:
 252         break;
 253         }
 254
 255         flags = hard_local_irq_save();
 256
 257         if (state) {
 258                 bfin_sic_iwr[bank] |= (1 << bit);
 259                 vr_wakeup  |= wakeup;
 260
 261         } else {
 262                 bfin_sic_iwr[bank] &= ~(1 << bit);
 263                 vr_wakeup  &= ~wakeup;
 264         }
 265
 266         hard_local_irq_restore(flags);
 267
 268         return 0;
 269 }
 270
 271 static int bfin_internal_set_wake_chip(struct irq_data *d, unsigned int state)
 272 {
 273         return bfin_internal_set_wake(d->irq, state);
 274 }
 275 #else
 276 inline int bfin_internal_set_wake(unsigned int irq, unsigned int state)
 277 {
 278         return 0;
 279 }
 280 # define bfin_internal_set_wake_chip NULL
 281 #endif
 282
 283 #else /* SEC_GCTL */
 284 static void bfin_sec_preflow_handler(struct irq_data *d)
 285 {
 286         unsigned long flags = hard_local_irq_save();
 287         unsigned int sid = BFIN_SYSIRQ(d->irq);
 288
 289         bfin_write_SEC_SCI(0, SEC_CSID, sid);
 290
 291         hard_local_irq_restore(flags);
 292 }
 293
 294 static void bfin_sec_mask_ack_irq(struct irq_data *d)
 295 {
 296         unsigned long flags = hard_local_irq_save();
 297         unsigned int sid = BFIN_SYSIRQ(d->irq);
 298
 299         bfin_write_SEC_SCI(0, SEC_CSID, sid);
 300
 301         hard_local_irq_restore(flags);
 302 }
 303
 304 static void bfin_sec_unmask_irq(struct irq_data *d)
 305 {
 306         unsigned long flags = hard_local_irq_save();
 307         unsigned int sid = BFIN_SYSIRQ(d->irq);
 308
 309         bfin_write32(SEC_END, sid);
 310
 311         hard_local_irq_restore(flags);
 312 }
 313
 314 static void bfin_sec_enable_ssi(unsigned int sid)
 315 {
 316         unsigned long flags = hard_local_irq_save();
 317         uint32_t reg_sctl = bfin_read_SEC_SCTL(sid);
 318
 319         reg_sctl |= SEC_SCTL_SRC_EN;
 320         bfin_write_SEC_SCTL(sid, reg_sctl);
 321
 322         hard_local_irq_restore(flags);
 323 }
 324
 325 static void bfin_sec_disable_ssi(unsigned int sid)
 326 {
 327         unsigned long flags = hard_local_irq_save();
 328         uint32_t reg_sctl = bfin_read_SEC_SCTL(sid);
 329
 330         reg_sctl &= ((uint32_t)~SEC_SCTL_SRC_EN);
 331         bfin_write_SEC_SCTL(sid, reg_sctl);
 332
 333         hard_local_irq_restore(flags);
 334 }
 335
 336 static void bfin_sec_set_ssi_coreid(unsigned int sid, unsigned int coreid)
 337 {
 338         unsigned long flags = hard_local_irq_save();
 339         uint32_t reg_sctl = bfin_read_SEC_SCTL(sid);
 340
 341         reg_sctl &= ((uint32_t)~SEC_SCTL_CTG);
 342         bfin_write_SEC_SCTL(sid, reg_sctl | ((coreid << 20) & SEC_SCTL_CTG));
 343
 344         hard_local_irq_restore(flags);
 345 }
 346
 347 static void bfin_sec_enable_sci(unsigned int sid)
 348 {
 349         unsigned long flags = hard_local_irq_save();
 350         uint32_t reg_sctl = bfin_read_SEC_SCTL(sid);
 351
 352         if (sid == BFIN_SYSIRQ(IRQ_WATCH0))
 353                 reg_sctl |= SEC_SCTL_FAULT_EN;
 354         else
 355                 reg_sctl |= SEC_SCTL_INT_EN;
 356         bfin_write_SEC_SCTL(sid, reg_sctl);
 357
 358         hard_local_irq_restore(flags);
 359 }
 360
 361 static void bfin_sec_disable_sci(unsigned int sid)
 362 {
 363         unsigned long flags = hard_local_irq_save();
 364         uint32_t reg_sctl = bfin_read_SEC_SCTL(sid);
 365
 366         reg_sctl &= ((uint32_t)~SEC_SCTL_INT_EN);
 367         bfin_write_SEC_SCTL(sid, reg_sctl);
 368
 369         hard_local_irq_restore(flags);
 370 }
 371
 372 static void bfin_sec_enable(struct irq_data *d)
 373 {
 374         unsigned long flags = hard_local_irq_save();
 375         unsigned int sid = BFIN_SYSIRQ(d->irq);
 376
 377         bfin_sec_enable_sci(sid);
 378         bfin_sec_enable_ssi(sid);
 379
 380         hard_local_irq_restore(flags);
 381 }
 382
 383 static void bfin_sec_disable(struct irq_data *d)
 384 {
 385         unsigned long flags = hard_local_irq_save();
 386         unsigned int sid = BFIN_SYSIRQ(d->irq);
 387
 388         bfin_sec_disable_sci(sid);
 389         bfin_sec_disable_ssi(sid);
 390
 391         hard_local_irq_restore(flags);
 392 }
 393
 394 static void bfin_sec_set_priority(unsigned int sec_int_levels, u8 *sec_int_priority)
 395 {
 396         unsigned long flags = hard_local_irq_save();
 397         uint32_t reg_sctl;
 398         int i;
 399
 400         bfin_write_SEC_SCI(0, SEC_CPLVL, sec_int_levels);
 401
 402         for (i = 0; i < SYS_IRQS - BFIN_IRQ(0); i++) {
 403                 reg_sctl = bfin_read_SEC_SCTL(i) & ~SEC_SCTL_PRIO;
 404                 reg_sctl |= sec_int_priority[i] << SEC_SCTL_PRIO_OFFSET;
 405                 bfin_write_SEC_SCTL(i, reg_sctl);
 406         }
 407
 408         hard_local_irq_restore(flags);
 409 }
 410
 411 void bfin_sec_raise_irq(unsigned int irq)
 412 {
 413         unsigned long flags = hard_local_irq_save();
 414         unsigned int sid = BFIN_SYSIRQ(irq);
 415
 416         bfin_write32(SEC_RAISE, sid);
 417
 418         hard_local_irq_restore(flags);
 419 }
 420
 421 static void init_software_driven_irq(void)
 422 {
 423         bfin_sec_set_ssi_coreid(34, 0);
 424         bfin_sec_set_ssi_coreid(35, 1);
 425
 426         bfin_sec_enable_sci(35);
 427         bfin_sec_enable_ssi(35);
 428         bfin_sec_set_ssi_coreid(36, 0);
 429         bfin_sec_set_ssi_coreid(37, 1);
 430         bfin_sec_enable_sci(37);
 431         bfin_sec_enable_ssi(37);
 432 }
 433
 434 void handle_sec_sfi_fault(uint32_t gstat)
 435 {
 436
 437 }
 438
 439 void handle_sec_sci_fault(uint32_t gstat)
 440 {
 441         uint32_t core_id;
 442         uint32_t cstat;
 443
 444         core_id = gstat & SEC_GSTAT_SCI;
 445         cstat = bfin_read_SEC_SCI(core_id, SEC_CSTAT);
 446         if (cstat & SEC_CSTAT_ERR) {
 447                 switch (cstat & SEC_CSTAT_ERRC) {
 448                 case SEC_CSTAT_ACKERR:
 449                         printk(KERN_DEBUG "sec ack err\n");
 450                         break;
 451                 default:
 452                         printk(KERN_DEBUG "sec sci unknown err\n");
 453                 }
 454         }
 455
 456 }
 457
 458 void handle_sec_ssi_fault(uint32_t gstat)
 459 {
 460         uint32_t sid;
 461         uint32_t sstat;
 462
 463         sid = gstat & SEC_GSTAT_SID;
 464         sstat = bfin_read_SEC_SSTAT(sid);
 465
 466 }
 467
 468 void handle_sec_fault(uint32_t sec_gstat)
 469 {
 470         if (sec_gstat & SEC_GSTAT_ERR) {
 471
 472                 switch (sec_gstat & SEC_GSTAT_ERRC) {
 473                 case 0:
 474                         handle_sec_sfi_fault(sec_gstat);
 475                         break;
 476                 case SEC_GSTAT_SCIERR:
 477                         handle_sec_sci_fault(sec_gstat);
 478                         break;
 479                 case SEC_GSTAT_SSIERR:
 480                         handle_sec_ssi_fault(sec_gstat);
 481                         break;
 482                 }
 483
 484
 485         }
 486 }
 487
 488 static struct irqaction bfin_fault_irq = {
 489         .name = "Blackfin fault",
 490 };
 491
 492 static irqreturn_t bfin_fault_routine(int irq, void *data)
 493 {
 494         struct pt_regs *fp = get_irq_regs();
 495
 496         switch (irq) {
 497         case IRQ_C0_DBL_FAULT:
 498                 double_fault_c(fp);
 499                 break;
 500         case IRQ_C0_HW_ERR:
 501                 dump_bfin_process(fp);
 502                 dump_bfin_mem(fp);
 503                 show_regs(fp);
 504                 printk(KERN_NOTICE "Kernel Stack\n");
 505                 show_stack(current, NULL);
 506                 print_modules();
 507                 panic("Core 0 hardware error");
 508                 break;
 509         case IRQ_C0_NMI_L1_PARITY_ERR:
 510                 panic("Core 0 NMI L1 parity error");
 511                 break;
 512         case IRQ_SEC_ERR:
 513                 pr_err("SEC error\n");
 514                 handle_sec_fault(bfin_read32(SEC_GSTAT));
 515                 break;
 516         default:
 517                 panic("Unknown fault %d", irq);
 518         }
 519
 520         return IRQ_HANDLED;
 521 }
 522 #endif /* SEC_GCTL */
 523
 524 static struct irq_chip bfin_core_irqchip = {
 525         .name = "CORE",
 526         .irq_mask = bfin_core_mask_irq,
 527         .irq_unmask = bfin_core_unmask_irq,
 528 };
 529
 530 #ifndef SEC_GCTL
 531 static struct irq_chip bfin_internal_irqchip = {
 532         .name = "INTN",
 533         .irq_mask = bfin_internal_mask_irq_chip,
 534         .irq_unmask = bfin_internal_unmask_irq_chip,
 535         .irq_disable = bfin_internal_mask_irq_chip,
 536         .irq_enable = bfin_internal_unmask_irq_chip,
 537 #ifdef CONFIG_SMP
 538         .irq_set_affinity = bfin_internal_set_affinity,
 539 #endif
 540         .irq_set_wake = bfin_internal_set_wake_chip,
 541 };
 542 #else
 543 static struct irq_chip bfin_sec_irqchip = {
 544         .name = "SEC",
 545         .irq_mask_ack = bfin_sec_mask_ack_irq,
 546         .irq_mask = bfin_sec_mask_ack_irq,
 547         .irq_unmask = bfin_sec_unmask_irq,
 548         .irq_eoi = bfin_sec_unmask_irq,
 549         .irq_disable = bfin_sec_disable,
 550         .irq_enable = bfin_sec_enable,
 551 };
 552 #endif
 553
 554 void bfin_handle_irq(unsigned irq)
 555 {
 556 #ifdef CONFIG_IPIPE
 557         struct pt_regs regs;    /* Contents not used. */
 558         ipipe_trace_irq_entry(irq);
 559         __ipipe_handle_irq(irq, &regs);
 560         ipipe_trace_irq_exit(irq);
 561 #else /* !CONFIG_IPIPE */
 562         generic_handle_irq(irq);
 563 #endif  /* !CONFIG_IPIPE */
 564 }
 565
 566 #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
 567 static int mac_stat_int_mask;
 568
 569 static void bfin_mac_status_ack_irq(unsigned int irq)
 570 {
 571         switch (irq) {
 572         case IRQ_MAC_MMCINT:
 573                 bfin_write_EMAC_MMC_TIRQS(
 574                         bfin_read_EMAC_MMC_TIRQE() &
 575                         bfin_read_EMAC_MMC_TIRQS());
 576                 bfin_write_EMAC_MMC_RIRQS(
 577                         bfin_read_EMAC_MMC_RIRQE() &
 578                         bfin_read_EMAC_MMC_RIRQS());
 579                 break;
 580         case IRQ_MAC_RXFSINT:
 581                 bfin_write_EMAC_RX_STKY(
 582                         bfin_read_EMAC_RX_IRQE() &
 583                         bfin_read_EMAC_RX_STKY());
 584                 break;
 585         case IRQ_MAC_TXFSINT:
 586                 bfin_write_EMAC_TX_STKY(
 587                         bfin_read_EMAC_TX_IRQE() &
 588                         bfin_read_EMAC_TX_STKY());
 589                 break;
 590         case IRQ_MAC_WAKEDET:
 591                  bfin_write_EMAC_WKUP_CTL(
 592                         bfin_read_EMAC_WKUP_CTL() | MPKS | RWKS);
 593                 break;
 594         default:
 595                 /* These bits are W1C */
 596                 bfin_write_EMAC_SYSTAT(1L << (irq - IRQ_MAC_PHYINT));
 597                 break;
 598         }
 599 }
 600
 601 static void bfin_mac_status_mask_irq(struct irq_data *d)
 602 {
 603         unsigned int irq = d->irq;
 604
 605         mac_stat_int_mask &= ~(1L << (irq - IRQ_MAC_PHYINT));
 606 #ifdef BF537_FAMILY
 607         switch (irq) {
 608         case IRQ_MAC_PHYINT:
 609                 bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() & ~PHYIE);
 610                 break;
 611         default:
 612                 break;
 613         }
 614 #else
 615         if (!mac_stat_int_mask)
 616                 bfin_internal_mask_irq(IRQ_MAC_ERROR);
 617 #endif
 618         bfin_mac_status_ack_irq(irq);
 619 }
 620
 621 static void bfin_mac_status_unmask_irq(struct irq_data *d)
 622 {
 623         unsigned int irq = d->irq;
 624
 625 #ifdef BF537_FAMILY
 626         switch (irq) {
 627         case IRQ_MAC_PHYINT:
 628                 bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() | PHYIE);
 629                 break;
 630         default:
 631                 break;
 632         }
 633 #else
 634         if (!mac_stat_int_mask)
 635                 bfin_internal_unmask_irq(IRQ_MAC_ERROR);
 636 #endif
 637         mac_stat_int_mask |= 1L << (irq - IRQ_MAC_PHYINT);
 638 }
 639
 640 #ifdef CONFIG_PM
 641 int bfin_mac_status_set_wake(struct irq_data *d, unsigned int state)
 642 {
 643 #ifdef BF537_FAMILY
 644         return bfin_internal_set_wake(IRQ_GENERIC_ERROR, state);
 645 #else
 646         return bfin_internal_set_wake(IRQ_MAC_ERROR, state);
 647 #endif
 648 }
 649 #else
 650 # define bfin_mac_status_set_wake NULL
 651 #endif
 652
 653 static struct irq_chip bfin_mac_status_irqchip = {
 654         .name = "MACST",
 655         .irq_mask = bfin_mac_status_mask_irq,
 656         .irq_unmask = bfin_mac_status_unmask_irq,
 657         .irq_set_wake = bfin_mac_status_set_wake,
 658 };
 659
 660 void bfin_demux_mac_status_irq(struct irq_desc *inta_desc)
 661 {
 662         int i, irq = 0;
 663         u32 status = bfin_read_EMAC_SYSTAT();
 664
 665         for (i = 0; i <= (IRQ_MAC_STMDONE - IRQ_MAC_PHYINT); i++)
 666                 if (status & (1L << i)) {
 667                         irq = IRQ_MAC_PHYINT + i;
 668                         break;
 669                 }
 670
 671         if (irq) {
 672                 if (mac_stat_int_mask & (1L << (irq - IRQ_MAC_PHYINT))) {
 673                         bfin_handle_irq(irq);
 674                 } else {
 675                         bfin_mac_status_ack_irq(irq);
 676                         pr_debug("IRQ %d:"
 677                                         " MASKED MAC ERROR INTERRUPT ASSERTED\n",
 678                                         irq);
 679                 }
 680         } else
 681                 printk(KERN_ERR
 682                                 "%s : %s : LINE %d :\nIRQ ?: MAC ERROR"
 683                                 " INTERRUPT ASSERTED BUT NO SOURCE FOUND"
 684                                 "(EMAC_SYSTAT=0x%X)\n",
 685                                 __func__, __FILE__, __LINE__, status);
 686 }
 687 #endif
 688
 689 static inline void bfin_set_irq_handler(struct irq_data *d, irq_flow_handler_t handle)
 690 {
 691 #ifdef CONFIG_IPIPE
 692         handle = handle_level_irq;
 693 #endif
 694         irq_set_handler_locked(d, handle);
 695 }
 696
 697 #ifdef CONFIG_GPIO_ADI
 698
 699 static DECLARE_BITMAP(gpio_enabled, MAX_BLACKFIN_GPIOS);
 700
 701 static void bfin_gpio_ack_irq(struct irq_data *d)
 702 {
 703         /* AFAIK ack_irq in case mask_ack is provided
 704          * get's only called for edge sense irqs
 705          */
 706         set_gpio_data(irq_to_gpio(d->irq), 0);
 707 }
 708
 709 static void bfin_gpio_mask_ack_irq(struct irq_data *d)
 710 {
 711         unsigned int irq = d->irq;
 712         u32 gpionr = irq_to_gpio(irq);
 713
 714         if (!irqd_is_level_type(d))
 715                 set_gpio_data(gpionr, 0);
 716
 717         set_gpio_maska(gpionr, 0);
 718 }
 719
 720 static void bfin_gpio_mask_irq(struct irq_data *d)
 721 {
 722         set_gpio_maska(irq_to_gpio(d->irq), 0);
 723 }
 724
 725 static void bfin_gpio_unmask_irq(struct irq_data *d)
 726 {
 727         set_gpio_maska(irq_to_gpio(d->irq), 1);
 728 }
 729
 730 static unsigned int bfin_gpio_irq_startup(struct irq_data *d)
 731 {
 732         u32 gpionr = irq_to_gpio(d->irq);
 733
 734         if (__test_and_set_bit(gpionr, gpio_enabled))
 735                 bfin_gpio_irq_prepare(gpionr);
 736
 737         bfin_gpio_unmask_irq(d);
 738
 739         return 0;
 740 }
 741
 742 static void bfin_gpio_irq_shutdown(struct irq_data *d)
 743 {
 744         u32 gpionr = irq_to_gpio(d->irq);
 745
 746         bfin_gpio_mask_irq(d);
 747         __clear_bit(gpionr, gpio_enabled);
 748         bfin_gpio_irq_free(gpionr);
 749 }
 750
 751 static int bfin_gpio_irq_type(struct irq_data *d, unsigned int type)
 752 {
 753         unsigned int irq = d->irq;
 754         int ret;
 755         char buf[16];
 756         u32 gpionr = irq_to_gpio(irq);
 757
 758         if (type == IRQ_TYPE_PROBE) {
 759                 /* only probe unenabled GPIO interrupt lines */
 760                 if (test_bit(gpionr, gpio_enabled))
 761                         return 0;
 762                 type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
 763         }
 764
 765         if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
 766                     IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
 767
 768                 snprintf(buf, 16, "gpio-irq%d", irq);
 769                 ret = bfin_gpio_irq_request(gpionr, buf);
 770                 if (ret)
 771                         return ret;
 772
 773                 if (__test_and_set_bit(gpionr, gpio_enabled))
 774                         bfin_gpio_irq_prepare(gpionr);
 775
 776         } else {
 777                 __clear_bit(gpionr, gpio_enabled);
 778                 return 0;
 779         }
 780
 781         set_gpio_inen(gpionr, 0);
 782         set_gpio_dir(gpionr, 0);
 783
 784         if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
 785             == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
 786                 set_gpio_both(gpionr, 1);
 787         else
 788                 set_gpio_both(gpionr, 0);
 789
 790         if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW)))
 791                 set_gpio_polar(gpionr, 1);      /* low or falling edge denoted by one */
 792         else
 793                 set_gpio_polar(gpionr, 0);      /* high or rising edge denoted by zero */
 794
 795         if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
 796                 set_gpio_edge(gpionr, 1);
 797                 set_gpio_inen(gpionr, 1);
 798                 set_gpio_data(gpionr, 0);
 799
 800         } else {
 801                 set_gpio_edge(gpionr, 0);
 802                 set_gpio_inen(gpionr, 1);
 803         }
 804
 805         if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
 806                 bfin_set_irq_handler(d, handle_edge_irq);
 807         else
 808                 bfin_set_irq_handler(d, handle_level_irq);
 809
 810         return 0;
 811 }
 812
 813 static void bfin_demux_gpio_block(unsigned int irq)
 814 {
 815         unsigned int gpio, mask;
 816
 817         gpio = irq_to_gpio(irq);
 818         mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio);
 819
 820         while (mask) {
 821                 if (mask & 1)
 822                         bfin_handle_irq(irq);
 823                 irq++;
 824                 mask >>= 1;
 825         }
 826 }
 827
 828 void bfin_demux_gpio_irq(struct irq_desc *desc)
 829 {
 830         unsigned int inta_irq = irq_desc_get_irq(desc);
 831         unsigned int irq;
 832
 833         switch (inta_irq) {
 834 #if defined(BF537_FAMILY)
 835         case IRQ_PF_INTA_PG_INTA:
 836                 bfin_demux_gpio_block(IRQ_PF0);
 837                 irq = IRQ_PG0;
 838                 break;
 839         case IRQ_PH_INTA_MAC_RX:
 840                 irq = IRQ_PH0;
 841                 break;
 842 #elif defined(BF533_FAMILY)
 843         case IRQ_PROG_INTA:
 844                 irq = IRQ_PF0;
 845                 break;
 846 #elif defined(BF538_FAMILY)
 847         case IRQ_PORTF_INTA:
 848                 irq = IRQ_PF0;
 849                 break;
 850 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
 851         case IRQ_PORTF_INTA:
 852                 irq = IRQ_PF0;
 853                 break;
 854         case IRQ_PORTG_INTA:
 855                 irq = IRQ_PG0;
 856                 break;
 857         case IRQ_PORTH_INTA:
 858                 irq = IRQ_PH0;
 859                 break;
 860 #elif defined(CONFIG_BF561)
 861         case IRQ_PROG0_INTA:
 862                 irq = IRQ_PF0;
 863                 break;
 864         case IRQ_PROG1_INTA:
 865                 irq = IRQ_PF16;
 866                 break;
 867         case IRQ_PROG2_INTA:
 868                 irq = IRQ_PF32;
 869                 break;
 870 #endif
 871         default:
 872                 BUG();
 873                 return;
 874         }
 875
 876         bfin_demux_gpio_block(irq);
 877 }
 878
 879 #ifdef CONFIG_PM
 880
 881 static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state)
 882 {
 883         return bfin_gpio_pm_wakeup_ctrl(irq_to_gpio(d->irq), state);
 884 }
 885
 886 #else
 887
 888 # define bfin_gpio_set_wake NULL
 889
 890 #endif
 891
 892 static struct irq_chip bfin_gpio_irqchip = {
 893         .name = "GPIO",
 894         .irq_ack = bfin_gpio_ack_irq,
 895         .irq_mask = bfin_gpio_mask_irq,
 896         .irq_mask_ack = bfin_gpio_mask_ack_irq,
 897         .irq_unmask = bfin_gpio_unmask_irq,
 898         .irq_disable = bfin_gpio_mask_irq,
 899         .irq_enable = bfin_gpio_unmask_irq,
 900         .irq_set_type = bfin_gpio_irq_type,
 901         .irq_startup = bfin_gpio_irq_startup,
 902         .irq_shutdown = bfin_gpio_irq_shutdown,
 903         .irq_set_wake = bfin_gpio_set_wake,
 904 };
 905
 906 #endif
 907
 908 #ifdef CONFIG_PM
 909
 910 #ifdef SEC_GCTL
 911 static u32 save_pint_sec_ctl[NR_PINT_SYS_IRQS];
 912
 913 static int sec_suspend(void)
 914 {
 915         u32 bank;
 916
 917         for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++)
 918                 save_pint_sec_ctl[bank] = bfin_read_SEC_SCTL(bank + BFIN_SYSIRQ(IRQ_PINT0));
 919         return 0;
 920 }
 921
 922 static void sec_resume(void)
 923 {
 924         u32 bank;
 925
 926         bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_RESET);
 927         udelay(100);
 928         bfin_write_SEC_GCTL(SEC_GCTL_EN);
 929         bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN);
 930
 931         for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++)
 932                 bfin_write_SEC_SCTL(bank + BFIN_SYSIRQ(IRQ_PINT0), save_pint_sec_ctl[bank]);
 933 }
 934
 935 static struct syscore_ops sec_pm_syscore_ops = {
 936         .suspend = sec_suspend,
 937         .resume = sec_resume,
 938 };
 939 #endif
 940
 941 #endif
 942
 943 void init_exception_vectors(void)
 944 {
 945         /* cannot program in software:
 946          * evt0 - emulation (jtag)
 947          * evt1 - reset
 948          */
 949         bfin_write_EVT2(evt_nmi);
 950         bfin_write_EVT3(trap);
 951         bfin_write_EVT5(evt_ivhw);
 952         bfin_write_EVT6(evt_timer);
 953         bfin_write_EVT7(evt_evt7);
 954         bfin_write_EVT8(evt_evt8);
 955         bfin_write_EVT9(evt_evt9);
 956         bfin_write_EVT10(evt_evt10);
 957         bfin_write_EVT11(evt_evt11);
 958         bfin_write_EVT12(evt_evt12);
 959         bfin_write_EVT13(evt_evt13);
 960         bfin_write_EVT14(evt_evt14);
 961         bfin_write_EVT15(evt_system_call);
 962         CSYNC();
 963 }
 964
 965 #ifndef SEC_GCTL
 966 /*
 967  * This function should be called during kernel startup to initialize
 968  * the BFin IRQ handling routines.
 969  */
 970
 971 int __init init_arch_irq(void)
 972 {
 973         int irq;
 974         unsigned long ilat = 0;
 975
 976         /*  Disable all the peripheral intrs  - page 4-29 HW Ref manual */
 977 #ifdef SIC_IMASK0
 978         bfin_write_SIC_IMASK0(SIC_UNMASK_ALL);
 979         bfin_write_SIC_IMASK1(SIC_UNMASK_ALL);
 980 # ifdef SIC_IMASK2
 981         bfin_write_SIC_IMASK2(SIC_UNMASK_ALL);
 982 # endif
 983 # if defined(CONFIG_SMP) || defined(CONFIG_ICC)
 984         bfin_write_SICB_IMASK0(SIC_UNMASK_ALL);
 985         bfin_write_SICB_IMASK1(SIC_UNMASK_ALL);
 986 # endif
 987 #else
 988         bfin_write_SIC_IMASK(SIC_UNMASK_ALL);
 989 #endif
 990
 991         local_irq_disable();
 992
 993         for (irq = 0; irq <= SYS_IRQS; irq++) {
 994                 if (irq <= IRQ_CORETMR)
 995                         irq_set_chip(irq, &bfin_core_irqchip);
 996                 else
 997                         irq_set_chip(irq, &bfin_internal_irqchip);
 998
 999                 switch (irq) {
1000 #if !BFIN_GPIO_PINT
1001 #if defined(BF537_FAMILY)
1002                 case IRQ_PH_INTA_MAC_RX:
1003                 case IRQ_PF_INTA_PG_INTA:
1004 #elif defined(BF533_FAMILY)
1005                 case IRQ_PROG_INTA:
1006 #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
1007                 case IRQ_PORTF_INTA:
1008                 case IRQ_PORTG_INTA:
1009                 case IRQ_PORTH_INTA:
1010 #elif defined(CONFIG_BF561)
1011                 case IRQ_PROG0_INTA:
1012                 case IRQ_PROG1_INTA:
1013                 case IRQ_PROG2_INTA:
1014 #elif defined(BF538_FAMILY)
1015                 case IRQ_PORTF_INTA:
1016 #endif
1017                         irq_set_chained_handler(irq, bfin_demux_gpio_irq);
1018                         break;
1019 #endif
1020 #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
1021                 case IRQ_MAC_ERROR:
1022                         irq_set_chained_handler(irq,
1023                                                 bfin_demux_mac_status_irq);
1024                         break;
1025 #endif
1026 #if defined(CONFIG_SMP) || defined(CONFIG_ICC)
1027                 case IRQ_SUPPLE_0:
1028                 case IRQ_SUPPLE_1:
1029                         irq_set_handler(irq, handle_percpu_irq);
1030                         break;
1031 #endif
1032
1033 #ifdef CONFIG_TICKSOURCE_CORETMR
1034                 case IRQ_CORETMR:
1035 # ifdef CONFIG_SMP
1036                         irq_set_handler(irq, handle_percpu_irq);
1037 # else
1038                         irq_set_handler(irq, handle_simple_irq);
1039 # endif
1040                         break;
1041 #endif
1042
1043 #ifdef CONFIG_TICKSOURCE_GPTMR0
1044                 case IRQ_TIMER0:
1045                         irq_set_handler(irq, handle_simple_irq);
1046                         break;
1047 #endif
1048
1049                 default:
1050 #ifdef CONFIG_IPIPE
1051                         irq_set_handler(irq, handle_level_irq);
1052 #else
1053                         irq_set_handler(irq, handle_simple_irq);
1054 #endif
1055                         break;
1056                 }
1057         }
1058
1059         init_mach_irq();
1060
1061 #if (defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
1062         for (irq = IRQ_MAC_PHYINT; irq <= IRQ_MAC_STMDONE; irq++)
1063                 irq_set_chip_and_handler(irq, &bfin_mac_status_irqchip,
1064                                          handle_level_irq);
1065 #endif
1066         /* if configured as edge, then will be changed to do_edge_IRQ */
1067 #ifdef CONFIG_GPIO_ADI
1068         for (irq = GPIO_IRQ_BASE;
1069                 irq < (GPIO_IRQ_BASE + MAX_BLACKFIN_GPIOS); irq++)
1070                 irq_set_chip_and_handler(irq, &bfin_gpio_irqchip,
1071                                          handle_level_irq);
1072 #endif
1073         bfin_write_IMASK(0);
1074         CSYNC();
1075         ilat = bfin_read_ILAT();
1076         CSYNC();
1077         bfin_write_ILAT(ilat);
1078         CSYNC();
1079
1080         printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
1081         /* IMASK=xxx is equivalent to STI xx or bfin_irq_flags=xx,
1082          * local_irq_enable()
1083          */
1084         program_IAR();
1085         /* Therefore it's better to setup IARs before interrupts enabled */
1086         search_IAR();
1087
1088         /* Enable interrupts IVG7-15 */
1089         bfin_irq_flags |= IMASK_IVG15 |
1090                 IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
1091                 IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
1092
1093
1094         /* This implicitly covers ANOMALY_05000171
1095          * Boot-ROM code modifies SICA_IWRx wakeup registers
1096          */
1097 #ifdef SIC_IWR0
1098         bfin_write_SIC_IWR0(IWR_DISABLE_ALL);
1099 # ifdef SIC_IWR1
1100         /* BF52x/BF51x system reset does not properly reset SIC_IWR1 which
1101          * will screw up the bootrom as it relies on MDMA0/1 waking it
1102          * up from IDLE instructions.  See this report for more info:
1103          * http://blackfin.uclinux.org/gf/tracker/4323
1104          */
1105         if (ANOMALY_05000435)
1106                 bfin_write_SIC_IWR1(IWR_ENABLE(10) | IWR_ENABLE(11));
1107         else
1108                 bfin_write_SIC_IWR1(IWR_DISABLE_ALL);
1109 # endif
1110 # ifdef SIC_IWR2
1111         bfin_write_SIC_IWR2(IWR_DISABLE_ALL);
1112 # endif
1113 #else
1114         bfin_write_SIC_IWR(IWR_DISABLE_ALL);
1115 #endif
1116         return 0;
1117 }
1118
1119 #ifdef CONFIG_DO_IRQ_L1
1120 __attribute__((l1_text))
1121 #endif
1122 static int vec_to_irq(int vec)
1123 {
1124         struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst;
1125         struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop;
1126         unsigned long sic_status[3];
1127         if (likely(vec == EVT_IVTMR_P))
1128                 return IRQ_CORETMR;
1129 #ifdef SIC_ISR
1130         sic_status[0] = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR();
1131 #else
1132         if (smp_processor_id()) {
1133 # ifdef SICB_ISR0
1134                 /* This will be optimized out in UP mode. */
1135                 sic_status[0] = bfin_read_SICB_ISR0() & bfin_read_SICB_IMASK0();
1136                 sic_status[1] = bfin_read_SICB_ISR1() & bfin_read_SICB_IMASK1();
1137 # endif
1138         } else {
1139                 sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0();
1140                 sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1();
1141         }
1142 #endif
1143 #ifdef SIC_ISR2
1144         sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2();
1145 #endif
1146
1147         for (;; ivg++) {
1148                 if (ivg >= ivg_stop)
1149                         return -1;
1150 #ifdef SIC_ISR
1151                 if (sic_status[0] & ivg->isrflag)
1152 #else
1153                 if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag)
1154 #endif
1155                         return ivg->irqno;
1156         }
1157 }
1158
1159 #else /* SEC_GCTL */
1160
1161 /*
1162  * This function should be called during kernel startup to initialize
1163  * the BFin IRQ handling routines.
1164  */
1165
1166 int __init init_arch_irq(void)
1167 {
1168         int irq;
1169         unsigned long ilat = 0;
1170
1171         bfin_write_SEC_GCTL(SEC_GCTL_RESET);
1172
1173         local_irq_disable();
1174
1175         for (irq = 0; irq <= SYS_IRQS; irq++) {
1176                 if (irq <= IRQ_CORETMR) {
1177                         irq_set_chip_and_handler(irq, &bfin_core_irqchip,
1178                                 handle_simple_irq);
1179 #if defined(CONFIG_TICKSOURCE_CORETMR) && defined(CONFIG_SMP)
1180                         if (irq == IRQ_CORETMR)
1181                                 irq_set_handler(irq, handle_percpu_irq);
1182 #endif
1183                 } else if (irq >= BFIN_IRQ(34) && irq <= BFIN_IRQ(37)) {
1184                         irq_set_chip_and_handler(irq, &bfin_sec_irqchip,
1185                                 handle_percpu_irq);
1186                 } else {
1187                         irq_set_chip(irq, &bfin_sec_irqchip);
1188                         irq_set_handler(irq, handle_fasteoi_irq);
1189                         __irq_set_preflow_handler(irq, bfin_sec_preflow_handler);
1190                 }
1191         }
1192
1193         bfin_write_IMASK(0);
1194         CSYNC();
1195         ilat = bfin_read_ILAT();
1196         CSYNC();
1197         bfin_write_ILAT(ilat);
1198         CSYNC();
1199
1200         printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
1201
1202         bfin_sec_set_priority(CONFIG_SEC_IRQ_PRIORITY_LEVELS, sec_int_priority);
1203
1204         /* Enable interrupts IVG7-15 */
1205         bfin_irq_flags |= IMASK_IVG15 |
1206             IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
1207             IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
1208
1209
1210         bfin_write_SEC_FCTL(SEC_FCTL_EN | SEC_FCTL_SYSRST_EN | SEC_FCTL_FLTIN_EN);
1211         bfin_sec_enable_sci(BFIN_SYSIRQ(IRQ_WATCH0));
1212         bfin_sec_enable_ssi(BFIN_SYSIRQ(IRQ_WATCH0));
1213         bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_RESET);
1214         udelay(100);
1215         bfin_write_SEC_GCTL(SEC_GCTL_EN);
1216         bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN);
1217         bfin_write_SEC_SCI(1, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN);
1218
1219         init_software_driven_irq();
1220
1221 #ifdef CONFIG_PM
1222         register_syscore_ops(&sec_pm_syscore_ops);
1223 #endif
1224
1225         bfin_fault_irq.handler = bfin_fault_routine;
1226 #ifdef CONFIG_L1_PARITY_CHECK
1227         setup_irq(IRQ_C0_NMI_L1_PARITY_ERR, &bfin_fault_irq);
1228 #endif
1229         setup_irq(IRQ_C0_DBL_FAULT, &bfin_fault_irq);
1230         setup_irq(IRQ_SEC_ERR, &bfin_fault_irq);
1231
1232         return 0;
1233 }
1234
1235 #ifdef CONFIG_DO_IRQ_L1
1236 __attribute__((l1_text))
1237 #endif
1238 static int vec_to_irq(int vec)
1239 {
1240         if (likely(vec == EVT_IVTMR_P))
1241                 return IRQ_CORETMR;
1242
1243         return BFIN_IRQ(bfin_read_SEC_SCI(0, SEC_CSID));
1244 }
1245 #endif  /* SEC_GCTL */
1246
1247 #ifdef CONFIG_DO_IRQ_L1
1248 __attribute__((l1_text))
1249 #endif
1250 void do_irq(int vec, struct pt_regs *fp)
1251 {
1252         int irq = vec_to_irq(vec);
1253         if (irq == -1)
1254                 return;
1255         asm_do_IRQ(irq, fp);
1256 }
1257
1258 #ifdef CONFIG_IPIPE
1259
1260 int __ipipe_get_irq_priority(unsigned irq)
1261 {
1262         int ient, prio;
1263
1264         if (irq <= IRQ_CORETMR)
1265                 return irq;
1266
1267 #ifdef SEC_GCTL
1268         if (irq >= BFIN_IRQ(0))
1269                 return IVG11;
1270 #else
1271         for (ient = 0; ient < NR_PERI_INTS; ient++) {
1272                 struct ivgx *ivg = ivg_table + ient;
1273                 if (ivg->irqno == irq) {
1274                         for (prio = 0; prio <= IVG13-IVG7; prio++) {
1275                                 if (ivg7_13[prio].ifirst <= ivg &&
1276                                     ivg7_13[prio].istop > ivg)
1277                                         return IVG7 + prio;
1278                         }
1279                 }
1280         }
1281 #endif
1282
1283         return IVG15;
1284 }
1285
1286 /* Hw interrupts are disabled on entry (check SAVE_CONTEXT). */
1287 #ifdef CONFIG_DO_IRQ_L1
1288 __attribute__((l1_text))
1289 #endif
1290 asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs)
1291 {
1292         struct ipipe_percpu_domain_data *p = ipipe_root_cpudom_ptr();
1293         struct ipipe_domain *this_domain = __ipipe_current_domain;
1294         int irq, s = 0;
1295
1296         irq = vec_to_irq(vec);
1297         if (irq == -1)
1298                 return 0;
1299
1300         if (irq == IRQ_SYSTMR) {
1301 #if !defined(CONFIG_GENERIC_CLOCKEVENTS) || defined(CONFIG_TICKSOURCE_GPTMR0)
1302                 bfin_write_TIMER_STATUS(1); /* Latch TIMIL0 */
1303 #endif
1304                 /* This is basically what we need from the register frame. */
1305                 __this_cpu_write(__ipipe_tick_regs.ipend, regs->ipend);
1306                 __this_cpu_write(__ipipe_tick_regs.pc, regs->pc);
1307                 if (this_domain != ipipe_root_domain)
1308                         __this_cpu_and(__ipipe_tick_regs.ipend, ~0x10);
1309                 else
1310                         __this_cpu_or(__ipipe_tick_regs.ipend, 0x10);
1311         }
1312
1313         /*
1314          * We don't want Linux interrupt handlers to run at the
1315          * current core priority level (i.e. < EVT15), since this
1316          * might delay other interrupts handled by a high priority
1317          * domain. Here is what we do instead:
1318          *
1319          * - we raise the SYNCDEFER bit to prevent
1320          * __ipipe_handle_irq() to sync the pipeline for the root
1321          * stage for the incoming interrupt. Upon return, that IRQ is
1322          * pending in the interrupt log.
1323          *
1324          * - we raise the TIF_IRQ_SYNC bit for the current thread, so
1325          * that _schedule_and_signal_from_int will eventually sync the
1326          * pipeline from EVT15.
1327          */
1328         if (this_domain == ipipe_root_domain) {
1329                 s = __test_and_set_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
1330                 barrier();
1331         }
1332
1333         ipipe_trace_irq_entry(irq);
1334         __ipipe_handle_irq(irq, regs);
1335         ipipe_trace_irq_exit(irq);
1336
1337         if (user_mode(regs) &&
1338             !ipipe_test_foreign_stack() &&
1339             (current->ipipe_flags & PF_EVTRET) != 0) {
1340                 /*
1341                  * Testing for user_regs() does NOT fully eliminate
1342                  * foreign stack contexts, because of the forged
1343                  * interrupt returns we do through
1344                  * __ipipe_call_irqtail. In that case, we might have
1345                  * preempted a foreign stack context in a high
1346                  * priority domain, with a single interrupt level now
1347                  * pending after the irqtail unwinding is done. In
1348                  * which case user_mode() is now true, and the event
1349                  * gets dispatched spuriously.
1350                  */
1351                 current->ipipe_flags &= ~PF_EVTRET;
1352                 __ipipe_dispatch_event(IPIPE_EVENT_RETURN, regs);
1353         }
1354
1355         if (this_domain == ipipe_root_domain) {
1356                 set_thread_flag(TIF_IRQ_SYNC);
1357                 if (!s) {
1358                         __clear_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
1359                         return !test_bit(IPIPE_STALL_FLAG, &p->status);
1360                 }
1361         }
1362
1363         return 0;
1364 }
1365
1366 #endif /* CONFIG_IPIPE */