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Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into...
[mirror_ubuntu-artful-kernel.git] / arch / blackfin / mach-common / ints-priority.c
CommitLineData
1394f032 1/*
96f1050d 2 * Set up the interrupt priorities
1394f032 3 *
96f1050d
RG		 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
1394f032 10 *
96f1050d 11 * Licensed under the GPL-2
1394f032
BW		 12 */
13
14#include <linux/module.h>
15#include <linux/kernel_stat.h>
16#include <linux/seq_file.h>
17#include <linux/irq.h>
5b5da4c4 18#include <linux/sched.h>
b17b0153 19#include <linux/sched/debug.h>
4f6b600f 20#include <linux/syscore_ops.h>
288e6eaa 21#include <linux/gpio.h>
4f6b600f 22#include <asm/delay.h>
6a01f230
YL		 23#ifdef CONFIG_IPIPE
24#include <linux/ipipe.h>
25#endif
1394f032
BW		 26#include <asm/traps.h>
27#include <asm/blackfin.h>
1394f032 28#include <asm/irq_handler.h>
761ec44a 29#include <asm/dpmc.h>
06051fde 30#include <asm/traps.h>
1394f032 31
1394f032
BW		 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
6b3087c6 39#ifndef CONFIG_SMP
a99bbccd
MF		 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 */
40059784
MF		 46unsigned long bfin_irq_flags = 0x1f;
47EXPORT_SYMBOL(bfin_irq_flags);
6b3087c6 48#endif
1394f032 49
cfefe3c6
MH		 50#ifdef CONFIG_PM
51unsigned long bfin_sic_iwr[3]; /* Up to 3 SIC_IWRx registers */
4a88d0ce 52unsigned vr_wakeup;
cfefe3c6
MH		 53#endif
54
11b27cb5 55#ifndef SEC_GCTL
e9e334c3 56static struct ivgx {
464abc5d 57 /* irq number for request_irq, available in mach-bf5xx/irq.h */
24a07a12 58 unsigned int irqno;
1394f032 59 /* corresponding bit in the SIC_ISR register */
24a07a12 60 unsigned int isrflag;
1394f032
BW		 61} ivg_table[NR_PERI_INTS];
62
e9e334c3 63static struct ivg_slice {
1394f032
BW		 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
1394f032
BW		 69
70/*
71 * Search SIC_IAR and fill tables with the irqvalues
72 * and their positions in the SIC_ISR register.
73 */
74static void __init search_IAR(void)
75{
76 unsigned ivg, irq_pos = 0;
77 for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) {
80fcdb95 78 int irqN;
1394f032 79
34e0fc89 80 ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos];
1394f032 81
80fcdb95
MF		 82 for (irqN = 0; irqN < NR_PERI_INTS; irqN += 4) {
83 int irqn;
4f6b600f
SM		 84 u32 iar =
85 bfin_read32((unsigned long *)SIC_IAR0 +
80fcdb95
MF		 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))
59003145 89#else
80fcdb95 90 (irqN >> 3)
59003145 91#endif
80fcdb95 92 );
80fcdb95
MF		 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 }
1394f032
BW		 101 }
102 }
103 }
104}
4f6b600f 105#endif
1394f032
BW		 106
107/*
464abc5d 108 * This is for core internal IRQs
1394f032 109 */
f58c3276 110void bfin_ack_noop(struct irq_data *d)
1394f032
BW		 111{
112 /* Dummy function. */
113}
114
4f19ea49 115static void bfin_core_mask_irq(struct irq_data *d)
1394f032 116{
4f19ea49 117 bfin_irq_flags &= ~(1 << d->irq);
3b139cdb
DH		 118 if (!hard_irqs_disabled())
119 hard_local_irq_enable();
1394f032
BW		 120}
121
4f19ea49 122static void bfin_core_unmask_irq(struct irq_data *d)
1394f032 123{
4f19ea49 124 bfin_irq_flags |= 1 << d->irq;
1394f032
BW		 125 /*
126 * If interrupts are enabled, IMASK must contain the same value
40059784 127 * as bfin_irq_flags. Make sure that invariant holds. If interrupts
1394f032
BW		 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.
40059784 131 * local_irq_enable just does "STI bfin_irq_flags", so it's exactly
1394f032
BW		 132 * what we need.
133 */
3b139cdb
DH		 134 if (!hard_irqs_disabled())
135 hard_local_irq_enable();
1394f032
BW		 136 return;
137}
138
86794b43 139#ifndef SEC_GCTL
f58c3276 140void bfin_internal_mask_irq(unsigned int irq)
1394f032 141{
fc6bd7b8 142 unsigned long flags = hard_local_irq_save();
fc6bd7b8 143#ifdef SIC_IMASK0
86794b43
SZ		 144 unsigned mask_bank = BFIN_SYSIRQ(irq) / 32;
145 unsigned mask_bit = BFIN_SYSIRQ(irq) % 32;
c04d66bb 146 bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) &
4f6b600f
SM		 147 ~(1 << mask_bit));
148# if defined(CONFIG_SMP) || defined(CONFIG_ICC)
6b3087c6 149 bfin_write_SICB_IMASK(mask_bank, bfin_read_SICB_IMASK(mask_bank) &
4f6b600f 150 ~(1 << mask_bit));
fc6bd7b8
MF		 151# endif
152#else
153 bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() &
86794b43 154 ~(1 << BFIN_SYSIRQ(irq)));
4f6b600f 155#endif /* end of SIC_IMASK0 */
3b139cdb 156 hard_local_irq_restore(flags);
1394f032
BW		 157}
158
ff43a67f
TG		 159static void bfin_internal_mask_irq_chip(struct irq_data *d)
160{
161 bfin_internal_mask_irq(d->irq);
162}
163
0325f25a 164#ifdef CONFIG_SMP
4f6b600f 165void bfin_internal_unmask_irq_affinity(unsigned int irq,
0325f25a
SZ		 166 const struct cpumask *affinity)
167#else
f58c3276 168void bfin_internal_unmask_irq(unsigned int irq)
0325f25a 169#endif
1394f032 170{
fc6bd7b8 171 unsigned long flags = hard_local_irq_save();
9bd50df6 172
fc6bd7b8 173#ifdef SIC_IMASK0
86794b43
SZ		 174 unsigned mask_bank = BFIN_SYSIRQ(irq) / 32;
175 unsigned mask_bit = BFIN_SYSIRQ(irq) % 32;
fc6bd7b8 176# ifdef CONFIG_SMP
0325f25a 177 if (cpumask_test_cpu(0, affinity))
fc6bd7b8 178# endif
0325f25a 179 bfin_write_SIC_IMASK(mask_bank,
4f6b600f
SM		 180 bfin_read_SIC_IMASK(mask_bank) |
181 (1 << mask_bit));
fc6bd7b8 182# ifdef CONFIG_SMP
0325f25a
SZ		 183 if (cpumask_test_cpu(1, affinity))
184 bfin_write_SICB_IMASK(mask_bank,
4f6b600f
SM		 185 bfin_read_SICB_IMASK(mask_bank) |
186 (1 << mask_bit));
fc6bd7b8
MF		 187# endif
188#else
189 bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() |
86794b43
SZ		 190 (1 << BFIN_SYSIRQ(irq)));
191#endif
192 hard_local_irq_restore(flags);
193}
194
195#ifdef CONFIG_SMP
196static void bfin_internal_unmask_irq_chip(struct irq_data *d)
197{
247bd4f1
JL		 198 bfin_internal_unmask_irq_affinity(d->irq,
199 irq_data_get_affinity_mask(d));
86794b43
SZ		 200}
201
202static 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
211static void bfin_internal_unmask_irq_chip(struct irq_data *d)
212{
213 bfin_internal_unmask_irq(d->irq);
214}
4f6b600f 215#endif
86794b43
SZ		 216
217#if defined(CONFIG_PM)
218int 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;
6b3087c6 235#endif
86794b43
SZ		 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
4f6b600f 266 hard_local_irq_restore(flags);
86794b43
SZ		 267
268 return 0;
4f6b600f
SM		 269}
270
86794b43
SZ		 271static 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
276inline 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 */
4f6b600f
SM		 284static void bfin_sec_preflow_handler(struct irq_data *d)
285{
286 unsigned long flags = hard_local_irq_save();
86794b43 287 unsigned int sid = BFIN_SYSIRQ(d->irq);
4f6b600f
SM		 288
289 bfin_write_SEC_SCI(0, SEC_CSID, sid);
290
291 hard_local_irq_restore(flags);
292}
293
294static void bfin_sec_mask_ack_irq(struct irq_data *d)
295{
296 unsigned long flags = hard_local_irq_save();
86794b43 297 unsigned int sid = BFIN_SYSIRQ(d->irq);
4f6b600f
SM		 298
299 bfin_write_SEC_SCI(0, SEC_CSID, sid);
300
301 hard_local_irq_restore(flags);
302}
303
304static void bfin_sec_unmask_irq(struct irq_data *d)
305{
306 unsigned long flags = hard_local_irq_save();
86794b43 307 unsigned int sid = BFIN_SYSIRQ(d->irq);
4f6b600f
SM		 308
309 bfin_write32(SEC_END, sid);
310
311 hard_local_irq_restore(flags);
312}
313
314static 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
325static 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
336static 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
347static 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
86794b43 352 if (sid == BFIN_SYSIRQ(IRQ_WATCH0))
4f6b600f
SM		 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
361static 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
372static void bfin_sec_enable(struct irq_data *d)
373{
374 unsigned long flags = hard_local_irq_save();
86794b43 375 unsigned int sid = BFIN_SYSIRQ(d->irq);
4f6b600f
SM		 376
377 bfin_sec_enable_sci(sid);
378 bfin_sec_enable_ssi(sid);
fc6bd7b8 379
3b139cdb 380 hard_local_irq_restore(flags);
1394f032
BW		 381}
382
4f6b600f
SM		 383static void bfin_sec_disable(struct irq_data *d)
384{
385 unsigned long flags = hard_local_irq_save();
86794b43 386 unsigned int sid = BFIN_SYSIRQ(d->irq);
4f6b600f
SM		 387
388 bfin_sec_disable_sci(sid);
389 bfin_sec_disable_ssi(sid);
390
391 hard_local_irq_restore(flags);
392}
393
e0a59310
SZ		 394static 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
86794b43 411void bfin_sec_raise_irq(unsigned int irq)
4f6b600f
SM		 412{
413 unsigned long flags = hard_local_irq_save();
86794b43 414 unsigned int sid = BFIN_SYSIRQ(irq);
4f6b600f
SM		 415
416 bfin_write32(SEC_RAISE, sid);
417
418 hard_local_irq_restore(flags);
419}
420
421static void init_software_driven_irq(void)
422{
423 bfin_sec_set_ssi_coreid(34, 0);
424 bfin_sec_set_ssi_coreid(35, 1);
86794b43
SZ		 425
426 bfin_sec_enable_sci(35);
427 bfin_sec_enable_ssi(35);
4f6b600f
SM		 428 bfin_sec_set_ssi_coreid(36, 0);
429 bfin_sec_set_ssi_coreid(37, 1);
86794b43
SZ		 430 bfin_sec_enable_sci(37);
431 bfin_sec_enable_ssi(37);
4f6b600f
SM		 432}
433
4f6b600f
SM		 434void handle_sec_sfi_fault(uint32_t gstat)
435{
436
437}
438
439void 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:
9b13494c 452 printk(KERN_DEBUG "sec sci unknown err\n");
4f6b600f
SM		 453 }
454 }
455
456}
457
458void 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
1b601239 468void handle_sec_fault(uint32_t sec_gstat)
4f6b600f 469{
4f6b600f
SM		 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 }
4f6b600f
SM		 486}
487
1b601239
SZ		 488static struct irqaction bfin_fault_irq = {
489 .name = "Blackfin fault",
490};
491
492static irqreturn_t bfin_fault_routine(int irq, void *data)
06051fde
SZ		 493{
494 struct pt_regs *fp = get_irq_regs();
495
06051fde
SZ		 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();
86794b43 507 panic("Core 0 hardware error");
06051fde
SZ		 508 break;
509 case IRQ_C0_NMI_L1_PARITY_ERR:
86794b43 510 panic("Core 0 NMI L1 parity error");
06051fde 511 break;
1b601239
SZ		 512 case IRQ_SEC_ERR:
513 pr_err("SEC error\n");
514 handle_sec_fault(bfin_read32(SEC_GSTAT));
515 break;
06051fde 516 default:
1b601239 517 panic("Unknown fault %d", irq);
06051fde
SZ		 518 }
519
1b601239 520 return IRQ_HANDLED;
06051fde 521}
86794b43 522#endif /* SEC_GCTL */
cfefe3c6 523
1394f032 524static struct irq_chip bfin_core_irqchip = {
763e63c6 525 .name = "CORE",
4f19ea49
TG		 526 .irq_mask = bfin_core_mask_irq,
527 .irq_unmask = bfin_core_unmask_irq,
1394f032
BW		 528};
529
86794b43 530#ifndef SEC_GCTL
1394f032 531static struct irq_chip bfin_internal_irqchip = {
763e63c6 532 .name = "INTN",
ff43a67f
TG		 533 .irq_mask = bfin_internal_mask_irq_chip,
534 .irq_unmask = bfin_internal_unmask_irq_chip,
ff43a67f
TG		 535 .irq_disable = bfin_internal_mask_irq_chip,
536 .irq_enable = bfin_internal_unmask_irq_chip,
0325f25a 537#ifdef CONFIG_SMP
ff43a67f 538 .irq_set_affinity = bfin_internal_set_affinity,
0325f25a 539#endif
ff43a67f 540 .irq_set_wake = bfin_internal_set_wake_chip,
1394f032 541};
86794b43 542#else
4f6b600f
SM		 543static 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
f58c3276 554void bfin_handle_irq(unsigned irq)
6a01f230
YL		 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 */
b10bbbbc 562 generic_handle_irq(irq);
6a01f230
YL		 563#endif /* !CONFIG_IPIPE */
564}
565
aec59c91
MH		 566#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
567static int mac_stat_int_mask;
568
569static 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
172d2d1d 601static void bfin_mac_status_mask_irq(struct irq_data *d)
aec59c91 602{
172d2d1d
TG		 603 unsigned int irq = d->irq;
604
aec59c91 605 mac_stat_int_mask &= ~(1L << (irq - IRQ_MAC_PHYINT));
f58c3276 606#ifdef BF537_FAMILY
aec59c91
MH		 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
172d2d1d 621static void bfin_mac_status_unmask_irq(struct irq_data *d)
aec59c91 622{
172d2d1d
TG		 623 unsigned int irq = d->irq;
624
f58c3276 625#ifdef BF537_FAMILY
aec59c91
MH		 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
172d2d1d 641int bfin_mac_status_set_wake(struct irq_data *d, unsigned int state)
aec59c91 642{
f58c3276 643#ifdef BF537_FAMILY
aec59c91
MH		 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}
fc6bd7b8
MF		 649#else
650# define bfin_mac_status_set_wake NULL
aec59c91
MH		 651#endif
652
653static struct irq_chip bfin_mac_status_irqchip = {
654 .name = "MACST",
172d2d1d
TG		 655 .irq_mask = bfin_mac_status_mask_irq,
656 .irq_unmask = bfin_mac_status_unmask_irq,
172d2d1d 657 .irq_set_wake = bfin_mac_status_set_wake,
aec59c91
MH		 658};
659
bd0b9ac4 660void bfin_demux_mac_status_irq(struct irq_desc *inta_desc)
aec59c91
MH		 661{
662 int i, irq = 0;
663 u32 status = bfin_read_EMAC_SYSTAT();
664
bedeea6e 665 for (i = 0; i <= (IRQ_MAC_STMDONE - IRQ_MAC_PHYINT); i++)
aec59c91
MH		 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:"
4f6b600f
SM		 677 " MASKED MAC ERROR INTERRUPT ASSERTED\n",
678 irq);
aec59c91
MH		 679 }
680 } else
681 printk(KERN_ERR
4f6b600f
SM		 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);
aec59c91
MH		 686}
687#endif
688
28438444 689static inline void bfin_set_irq_handler(struct irq_data *d, irq_flow_handler_t handle)
bfd15117 690{
6a01f230 691#ifdef CONFIG_IPIPE
5b5da4c4 692 handle = handle_level_irq;
6a01f230 693#endif
28438444 694 irq_set_handler_locked(d, handle);
bfd15117
GY		 695}
696
54e4ff4d 697#ifdef CONFIG_GPIO_ADI
6fce6a8d 698
54e4ff4d 699static DECLARE_BITMAP(gpio_enabled, MAX_BLACKFIN_GPIOS);
8d022374 700
e9502850 701static void bfin_gpio_ack_irq(struct irq_data *d)
1394f032 702{
8d022374
MH		 703 /* AFAIK ack_irq in case mask_ack is provided
704 * get's only called for edge sense irqs
705 */
e9502850 706 set_gpio_data(irq_to_gpio(d->irq), 0);
1394f032
BW		 707}
708
e9502850 709static void bfin_gpio_mask_ack_irq(struct irq_data *d)
1394f032 710{
e9502850 711 unsigned int irq = d->irq;
8d022374 712 u32 gpionr = irq_to_gpio(irq);
1394f032 713
1907d8be 714 if (!irqd_is_level_type(d))
1394f032 715 set_gpio_data(gpionr, 0);
1394f032
BW		 716
717 set_gpio_maska(gpionr, 0);
1394f032
BW		 718}
719
e9502850 720static void bfin_gpio_mask_irq(struct irq_data *d)
1394f032 721{
e9502850 722 set_gpio_maska(irq_to_gpio(d->irq), 0);
1394f032
BW		 723}
724
e9502850 725static void bfin_gpio_unmask_irq(struct irq_data *d)
1394f032 726{
e9502850 727 set_gpio_maska(irq_to_gpio(d->irq), 1);
1394f032
BW		 728}
729
e9502850 730static unsigned int bfin_gpio_irq_startup(struct irq_data *d)
1394f032 731{
e9502850 732 u32 gpionr = irq_to_gpio(d->irq);
1394f032 733
8d022374 734 if (__test_and_set_bit(gpionr, gpio_enabled))
affee2b2 735 bfin_gpio_irq_prepare(gpionr);
1394f032 736
e9502850 737 bfin_gpio_unmask_irq(d);
1394f032 738
affee2b2 739 return 0;
1394f032
BW		 740}
741
e9502850 742static void bfin_gpio_irq_shutdown(struct irq_data *d)
1394f032 743{
e9502850 744 u32 gpionr = irq_to_gpio(d->irq);
30af6d49 745
e9502850 746 bfin_gpio_mask_irq(d);
30af6d49 747 __clear_bit(gpionr, gpio_enabled);
9570ff4a 748 bfin_gpio_irq_free(gpionr);
1394f032
BW		 749}
750
e9502850 751static int bfin_gpio_irq_type(struct irq_data *d, unsigned int type)
1394f032 752{
e9502850 753 unsigned int irq = d->irq;
8eb3e3bf
GY		 754 int ret;
755 char buf[16];
8d022374 756 u32 gpionr = irq_to_gpio(irq);
1394f032
BW		 757
758 if (type == IRQ_TYPE_PROBE) {
759 /* only probe unenabled GPIO interrupt lines */
c3695341 760 if (test_bit(gpionr, gpio_enabled))
1394f032
BW		 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 |
34e0fc89 766 IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
8d022374 767
9570ff4a
GY		 768 snprintf(buf, 16, "gpio-irq%d", irq);
769 ret = bfin_gpio_irq_request(gpionr, buf);
770 if (ret)
771 return ret;
772
8d022374 773 if (__test_and_set_bit(gpionr, gpio_enabled))
affee2b2 774 bfin_gpio_irq_prepare(gpionr);
1394f032 775
1394f032 776 } else {
8d022374 777 __clear_bit(gpionr, gpio_enabled);
1394f032
BW		 778 return 0;
779 }
780
f1bceb47 781 set_gpio_inen(gpionr, 0);
1394f032 782 set_gpio_dir(gpionr, 0);
1394f032
BW		 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
f1bceb47
MH		 795 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
796 set_gpio_edge(gpionr, 1);
797 set_gpio_inen(gpionr, 1);
f1bceb47
MH		 798 set_gpio_data(gpionr, 0);
799
800 } else {
801 set_gpio_edge(gpionr, 0);
f1bceb47
MH		 802 set_gpio_inen(gpionr, 1);
803 }
804
1394f032 805 if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING))
28438444 806 bfin_set_irq_handler(d, handle_edge_irq);
1394f032 807 else
28438444 808 bfin_set_irq_handler(d, handle_level_irq);
1394f032
BW		 809
810 return 0;
811}
812
e2a8092c
MF		 813static 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
bd0b9ac4 828void bfin_demux_gpio_irq(struct irq_desc *desc)
1394f032 829{
2b501769 830 unsigned int inta_irq = irq_desc_get_irq(desc);
e2a8092c 831 unsigned int irq;
2c4f829b
MH		 832
833 switch (inta_irq) {
e2a8092c 834#if defined(BF537_FAMILY)
8c054103 835 case IRQ_PF_INTA_PG_INTA:
e2a8092c
MF		 836 bfin_demux_gpio_block(IRQ_PF0);
837 irq = IRQ_PG0;
2c4f829b 838 break;
8c054103 839 case IRQ_PH_INTA_MAC_RX:
2c4f829b
MH		 840 irq = IRQ_PH0;
841 break;
e2a8092c
MF		 842#elif defined(BF533_FAMILY)
843 case IRQ_PROG_INTA:
844 irq = IRQ_PF0;
845 break;
fc6bd7b8 846#elif defined(BF538_FAMILY)
dc26aec2
MH		 847 case IRQ_PORTF_INTA:
848 irq = IRQ_PF0;
849 break;
2f6f4bcd 850#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
2c4f829b
MH		 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
e2a8092c 876 bfin_demux_gpio_block(irq);
1394f032
BW		 877}
878
cfefe3c6 879#ifdef CONFIG_PM
d49cdf84 880
dd8cb37b 881static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state)
cfefe3c6 882{
54e4ff4d
SZ		 883 return bfin_gpio_pm_wakeup_ctrl(irq_to_gpio(d->irq), state);
884}
cfefe3c6 885
54e4ff4d 886#else
cfefe3c6 887
54e4ff4d 888# define bfin_gpio_set_wake NULL
d49cdf84 889
54e4ff4d 890#endif
d49cdf84 891
54e4ff4d
SZ		 892static 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};
d49cdf84 905
54e4ff4d 906#endif
d49cdf84 907
54e4ff4d 908#ifdef CONFIG_PM
d49cdf84 909
11b27cb5 910#ifdef SEC_GCTL
54e4ff4d
SZ		 911static u32 save_pint_sec_ctl[NR_PINT_SYS_IRQS];
912
d49cdf84
SM		 913static int sec_suspend(void)
914{
915 u32 bank;
916
917 for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++)
86794b43 918 save_pint_sec_ctl[bank] = bfin_read_SEC_SCTL(bank + BFIN_SYSIRQ(IRQ_PINT0));
d49cdf84
SM		 919 return 0;
920}
921
922static 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++)
86794b43 932 bfin_write_SEC_SCTL(bank + BFIN_SYSIRQ(IRQ_PINT0), save_pint_sec_ctl[bank]);
d49cdf84
SM		 933}
934
935static struct syscore_ops sec_pm_syscore_ops = {
936 .suspend = sec_suspend,
937 .resume = sec_resume,
938};
4f6b600f 939#endif
34e0fc89 940
a055b2b4 941#endif
1394f032 942
13dff62d 943void init_exception_vectors(void)
8be80ed3 944{
f0b5d12f
MF		 945 /* cannot program in software:
946 * evt0 - emulation (jtag)
947 * evt1 - reset
948 */
949 bfin_write_EVT2(evt_nmi);
8be80ed3
BS		 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);
9703a73c 960 bfin_write_EVT14(evt_evt14);
8be80ed3
BS		 961 bfin_write_EVT15(evt_system_call);
962 CSYNC();
963}
964
11b27cb5 965#ifndef SEC_GCTL
1394f032
BW		 966/*
967 * This function should be called during kernel startup to initialize
968 * the BFin IRQ handling routines.
969 */
8d022374 970
1394f032
BW		 971int __init init_arch_irq(void)
972{
973 int irq;
974 unsigned long ilat = 0;
fc6bd7b8 975
1394f032 976 /* Disable all the peripheral intrs - page 4-29 HW Ref manual */
fc6bd7b8 977#ifdef SIC_IMASK0
24a07a12
RH		 978 bfin_write_SIC_IMASK0(SIC_UNMASK_ALL);
979 bfin_write_SIC_IMASK1(SIC_UNMASK_ALL);
fc6bd7b8 980# ifdef SIC_IMASK2
59003145 981 bfin_write_SIC_IMASK2(SIC_UNMASK_ALL);
a055b2b4 982# endif
4f6b600f 983# if defined(CONFIG_SMP) || defined(CONFIG_ICC)
6b3087c6
GY		 984 bfin_write_SICB_IMASK0(SIC_UNMASK_ALL);
985 bfin_write_SICB_IMASK1(SIC_UNMASK_ALL);
986# endif
24a07a12 987#else
1394f032 988 bfin_write_SIC_IMASK(SIC_UNMASK_ALL);
24a07a12 989#endif
1394f032
BW		 990
991 local_irq_disable();
992
34e0fc89 993 for (irq = 0; irq <= SYS_IRQS; irq++) {
1394f032 994 if (irq <= IRQ_CORETMR)
43f2f115 995 irq_set_chip(irq, &bfin_core_irqchip);
1394f032 996 else
43f2f115 997 irq_set_chip(irq, &bfin_internal_irqchip);
1394f032 998
464abc5d 999 switch (irq) {
54e4ff4d
SZ		 1000#if !BFIN_GPIO_PINT
1001#if defined(BF537_FAMILY)
01f8e34c
MF		 1002 case IRQ_PH_INTA_MAC_RX:
1003 case IRQ_PF_INTA_PG_INTA:
1004#elif defined(BF533_FAMILY)
1005 case IRQ_PROG_INTA:
2f6f4bcd 1006#elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x)
464abc5d
MH		 1007 case IRQ_PORTF_INTA:
1008 case IRQ_PORTG_INTA:
1009 case IRQ_PORTH_INTA:
2c4f829b 1010#elif defined(CONFIG_BF561)
464abc5d
MH		 1011 case IRQ_PROG0_INTA:
1012 case IRQ_PROG1_INTA:
1013 case IRQ_PROG2_INTA:
fc6bd7b8 1014#elif defined(BF538_FAMILY)
dc26aec2 1015 case IRQ_PORTF_INTA:
1394f032 1016#endif
43f2f115 1017 irq_set_chained_handler(irq, bfin_demux_gpio_irq);
464abc5d 1018 break;
54e4ff4d 1019#endif
aec59c91
MH		 1020#if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)
1021 case IRQ_MAC_ERROR:
43f2f115
TG		 1022 irq_set_chained_handler(irq,
1023 bfin_demux_mac_status_irq);
aec59c91
MH		 1024 break;
1025#endif
4f6b600f 1026#if defined(CONFIG_SMP) || defined(CONFIG_ICC)
6b3087c6
GY		 1027 case IRQ_SUPPLE_0:
1028 case IRQ_SUPPLE_1:
43f2f115 1029 irq_set_handler(irq, handle_percpu_irq);
6b3087c6
GY		 1030 break;
1031#endif
17941314 1032
cb191718
YL		 1033#ifdef CONFIG_TICKSOURCE_CORETMR
1034 case IRQ_CORETMR:
1035# ifdef CONFIG_SMP
43f2f115 1036 irq_set_handler(irq, handle_percpu_irq);
cb191718 1037# else
43f2f115 1038 irq_set_handler(irq, handle_simple_irq);
cb191718 1039# endif
fc6bd7b8 1040 break;
17941314 1041#endif
cb191718
YL		 1042
1043#ifdef CONFIG_TICKSOURCE_GPTMR0
1044 case IRQ_TIMER0:
43f2f115 1045 irq_set_handler(irq, handle_simple_irq);
a40494a6 1046 break;
cb191718
YL		 1047#endif
1048
a40494a6 1049 default:
fc6bd7b8 1050#ifdef CONFIG_IPIPE
43f2f115 1051 irq_set_handler(irq, handle_level_irq);
fc6bd7b8 1052#else
43f2f115 1053 irq_set_handler(irq, handle_simple_irq);
fc6bd7b8 1054#endif
464abc5d
MH		 1055 break;
1056 }
1394f032 1057 }
464abc5d 1058
f58c3276 1059 init_mach_irq();
1394f032 1060
11b27cb5 1061#if (defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE))
aec59c91 1062 for (irq = IRQ_MAC_PHYINT; irq <= IRQ_MAC_STMDONE; irq++)
43f2f115 1063 irq_set_chip_and_handler(irq, &bfin_mac_status_irqchip,
aec59c91
MH		 1064 handle_level_irq);
1065#endif
464abc5d 1066 /* if configured as edge, then will be changed to do_edge_IRQ */
54e4ff4d 1067#ifdef CONFIG_GPIO_ADI
aec59c91
MH		 1068 for (irq = GPIO_IRQ_BASE;
1069 irq < (GPIO_IRQ_BASE + MAX_BLACKFIN_GPIOS); irq++)
43f2f115 1070 irq_set_chip_and_handler(irq, &bfin_gpio_irqchip,
464abc5d 1071 handle_level_irq);
54e4ff4d 1072#endif
1394f032
BW		 1073 bfin_write_IMASK(0);
1074 CSYNC();
1075 ilat = bfin_read_ILAT();
1076 CSYNC();
1077 bfin_write_ILAT(ilat);
1078 CSYNC();
1079
34e0fc89 1080 printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n");
40059784 1081 /* IMASK=xxx is equivalent to STI xx or bfin_irq_flags=xx,
1394f032
BW		 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 */
40059784 1089 bfin_irq_flags |= IMASK_IVG15 |
4f6b600f
SM		 1090 IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 |
1091 IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW;
1092
1394f032 1093
349ebbcc
MH		 1094 /* This implicitly covers ANOMALY_05000171
1095 * Boot-ROM code modifies SICA_IWRx wakeup registers
1096 */
be1d8543 1097#ifdef SIC_IWR0
56f5f590 1098 bfin_write_SIC_IWR0(IWR_DISABLE_ALL);
be1d8543 1099# ifdef SIC_IWR1
2f6f4bcd 1100 /* BF52x/BF51x system reset does not properly reset SIC_IWR1 which
55546ac4
MH		 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 */
b7e11293
MF		 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);
be1d8543
MF		 1109# endif
1110# ifdef SIC_IWR2
56f5f590 1111 bfin_write_SIC_IWR2(IWR_DISABLE_ALL);
fe9ec9b9
MH		 1112# endif
1113#else
56f5f590 1114 bfin_write_SIC_IWR(IWR_DISABLE_ALL);
4f6b600f 1115#endif
1394f032
BW		 1116 return 0;
1117}
1118
1119#ifdef CONFIG_DO_IRQ_L1
a055b2b4 1120__attribute__((l1_text))
1394f032 1121#endif
6b108049 1122static int vec_to_irq(int vec)
1394f032 1123{
6b108049
MF		 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];
6b108049
MF		 1127 if (likely(vec == EVT_IVTMR_P))
1128 return IRQ_CORETMR;
6b108049
MF		 1129#ifdef SIC_ISR
1130 sic_status[0] = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR();
1131#else
1132 if (smp_processor_id()) {
780172bf 1133# ifdef SICB_ISR0
6b108049
MF		 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();
780172bf 1137# endif
6b108049
MF		 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
1394f032 1146
6b108049
MF		 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)
24a07a12 1154#endif
6b108049 1155 return ivg->irqno;
1394f032 1156 }
11b27cb5
SZ		 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
1166int __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
11b27cb5
SZ		 1175 for (irq = 0; irq <= SYS_IRQS; irq++) {
1176 if (irq <= IRQ_CORETMR) {
86794b43
SZ		 1177 irq_set_chip_and_handler(irq, &bfin_core_irqchip,
1178 handle_simple_irq);
1179#if defined(CONFIG_TICKSOURCE_CORETMR) && defined(CONFIG_SMP)
11b27cb5 1180 if (irq == IRQ_CORETMR)
11b27cb5 1181 irq_set_handler(irq, handle_percpu_irq);
11b27cb5 1182#endif
11b27cb5 1183 } else if (irq >= BFIN_IRQ(34) && irq <= BFIN_IRQ(37)) {
11b27cb5 1184 irq_set_chip_and_handler(irq, &bfin_sec_irqchip,
86794b43
SZ		 1185 handle_percpu_irq);
1186 } else {
1187 irq_set_chip(irq, &bfin_sec_irqchip);
1b601239 1188 irq_set_handler(irq, handle_fasteoi_irq);
11b27cb5
SZ		 1189 __irq_set_preflow_handler(irq, bfin_sec_preflow_handler);
1190 }
1191 }
11b27cb5
SZ		 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
e0a59310
SZ		 1202 bfin_sec_set_priority(CONFIG_SEC_IRQ_PRIORITY_LEVELS, sec_int_priority);
1203
11b27cb5
SZ		 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);
86794b43
SZ		 1211 bfin_sec_enable_sci(BFIN_SYSIRQ(IRQ_WATCH0));
1212 bfin_sec_enable_ssi(BFIN_SYSIRQ(IRQ_WATCH0));
11b27cb5
SZ		 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();
36c47239
SM		 1220
1221#ifdef CONFIG_PM
11b27cb5 1222 register_syscore_ops(&sec_pm_syscore_ops);
36c47239 1223#endif
11b27cb5 1224
1b601239
SZ		 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
11b27cb5
SZ		 1232 return 0;
1233}
1234
1235#ifdef CONFIG_DO_IRQ_L1
1236__attribute__((l1_text))
1237#endif
1238static int vec_to_irq(int vec)
1239{
1240 if (likely(vec == EVT_IVTMR_P))
1241 return IRQ_CORETMR;
1242
4f6b600f 1243 return BFIN_IRQ(bfin_read_SEC_SCI(0, SEC_CSID));
6b108049 1244}
11b27cb5 1245#endif /* SEC_GCTL */
6b108049
MF		 1246
1247#ifdef CONFIG_DO_IRQ_L1
1248__attribute__((l1_text))
1249#endif
1250void 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);
1394f032 1256}
6a01f230
YL		 1257
1258#ifdef CONFIG_IPIPE
1259
1260int __ipipe_get_irq_priority(unsigned irq)
1261{
1262 int ient, prio;
1263
1264 if (irq <= IRQ_CORETMR)
1265 return irq;
1266
11b27cb5
SZ		 1267#ifdef SEC_GCTL
1268 if (irq >= BFIN_IRQ(0))
1269 return IVG11;
1270#else
6a01f230
YL		 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 }
11b27cb5 1281#endif
6a01f230
YL		 1282
1283 return IVG15;
1284}
1285
6a01f230
YL		 1286/* Hw interrupts are disabled on entry (check SAVE_CONTEXT). */
1287#ifdef CONFIG_DO_IRQ_L1
1288__attribute__((l1_text))
1289#endif
1290asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs)
1291{
9bd50df6 1292 struct ipipe_percpu_domain_data *p = ipipe_root_cpudom_ptr();
a40494a6 1293 struct ipipe_domain *this_domain = __ipipe_current_domain;
5b5da4c4 1294 int irq, s = 0;
6a01f230 1295
6b108049
MF		 1296 irq = vec_to_irq(vec);
1297 if (irq == -1)
1298 return 0;
6a01f230
YL		 1299
1300 if (irq == IRQ_SYSTMR) {
a40494a6 1301#if !defined(CONFIG_GENERIC_CLOCKEVENTS) || defined(CONFIG_TICKSOURCE_GPTMR0)
6a01f230 1302 bfin_write_TIMER_STATUS(1); /* Latch TIMIL0 */
9bd50df6 1303#endif
6a01f230 1304 /* This is basically what we need from the register frame. */
7e788ab1
CL		 1305 __this_cpu_write(__ipipe_tick_regs.ipend, regs->ipend);
1306 __this_cpu_write(__ipipe_tick_regs.pc, regs->pc);
9bd50df6 1307 if (this_domain != ipipe_root_domain)
7e788ab1 1308 __this_cpu_and(__ipipe_tick_regs.ipend, ~0x10);
9bd50df6 1309 else
7e788ab1 1310 __this_cpu_or(__ipipe_tick_regs.ipend, 0x10);
6a01f230
YL		 1311 }
1312
5b5da4c4
PG		 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 */
9bd50df6
PG		 1328 if (this_domain == ipipe_root_domain) {
1329 s = __test_and_set_bit(IPIPE_SYNCDEFER_FLAG, &p->status);
1330 barrier();
1331 }
6a01f230
YL		 1332
1333 ipipe_trace_irq_entry(irq);
1334 __ipipe_handle_irq(irq, regs);
9bd50df6 1335 ipipe_trace_irq_exit(irq);
6a01f230 1336
5b5da4c4
PG		 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
9bd50df6
PG		 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 }
6a01f230 1362
1fa9be72 1363 return 0;
6a01f230
YL		 1364}
1365
1366#endif /* CONFIG_IPIPE */
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