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Merge commit 'v2.6.28-rc7' into core/locking
[linux-2.6-block.git] / arch / powerpc / sysdev / mpic.c
CommitLineData
14cf11af
PM		 1/*
2 * arch/powerpc/kernel/mpic.c
3 *
4 * Driver for interrupt controllers following the OpenPIC standard, the
5 * common implementation beeing IBM's MPIC. This driver also can deal
6 * with various broken implementations of this HW.
7 *
8 * Copyright (C) 2004 Benjamin Herrenschmidt, IBM Corp.
9 *
10 * This file is subject to the terms and conditions of the GNU General Public
11 * License. See the file COPYING in the main directory of this archive
12 * for more details.
13 */
14
15#undef DEBUG
1beb6a7d
BH		 16#undef DEBUG_IPI
17#undef DEBUG_IRQ
18#undef DEBUG_LOW
14cf11af 19
14cf11af
PM		 20#include <linux/types.h>
21#include <linux/kernel.h>
22#include <linux/init.h>
23#include <linux/irq.h>
24#include <linux/smp.h>
25#include <linux/interrupt.h>
26#include <linux/bootmem.h>
27#include <linux/spinlock.h>
28#include <linux/pci.h>
29
30#include <asm/ptrace.h>
31#include <asm/signal.h>
32#include <asm/io.h>
33#include <asm/pgtable.h>
34#include <asm/irq.h>
35#include <asm/machdep.h>
36#include <asm/mpic.h>
37#include <asm/smp.h>
38
a7de7c74
ME		 39#include "mpic.h"
40
14cf11af
PM		 41#ifdef DEBUG
42#define DBG(fmt...) printk(fmt)
43#else
44#define DBG(fmt...)
45#endif
46
47static struct mpic *mpics;
48static struct mpic *mpic_primary;
49static DEFINE_SPINLOCK(mpic_lock);
50
c0c0d996 51#ifdef CONFIG_PPC32 /* XXX for now */
e40c7f02
AW		 52#ifdef CONFIG_IRQ_ALL_CPUS
53#define distribute_irqs (1)
54#else
55#define distribute_irqs (0)
56#endif
c0c0d996 57#endif
14cf11af 58
7233593b
ZR		 59#ifdef CONFIG_MPIC_WEIRD
60static u32 mpic_infos[][MPIC_IDX_END] = {
61 [0] = { /* Original OpenPIC compatible MPIC */
62 MPIC_GREG_BASE,
63 MPIC_GREG_FEATURE_0,
64 MPIC_GREG_GLOBAL_CONF_0,
65 MPIC_GREG_VENDOR_ID,
66 MPIC_GREG_IPI_VECTOR_PRI_0,
67 MPIC_GREG_IPI_STRIDE,
68 MPIC_GREG_SPURIOUS,
69 MPIC_GREG_TIMER_FREQ,
70
71 MPIC_TIMER_BASE,
72 MPIC_TIMER_STRIDE,
73 MPIC_TIMER_CURRENT_CNT,
74 MPIC_TIMER_BASE_CNT,
75 MPIC_TIMER_VECTOR_PRI,
76 MPIC_TIMER_DESTINATION,
77
78 MPIC_CPU_BASE,
79 MPIC_CPU_STRIDE,
80 MPIC_CPU_IPI_DISPATCH_0,
81 MPIC_CPU_IPI_DISPATCH_STRIDE,
82 MPIC_CPU_CURRENT_TASK_PRI,
83 MPIC_CPU_WHOAMI,
84 MPIC_CPU_INTACK,
85 MPIC_CPU_EOI,
f365355e 86 MPIC_CPU_MCACK,
7233593b
ZR		 87
88 MPIC_IRQ_BASE,
89 MPIC_IRQ_STRIDE,
90 MPIC_IRQ_VECTOR_PRI,
91 MPIC_VECPRI_VECTOR_MASK,
92 MPIC_VECPRI_POLARITY_POSITIVE,
93 MPIC_VECPRI_POLARITY_NEGATIVE,
94 MPIC_VECPRI_SENSE_LEVEL,
95 MPIC_VECPRI_SENSE_EDGE,
96 MPIC_VECPRI_POLARITY_MASK,
97 MPIC_VECPRI_SENSE_MASK,
98 MPIC_IRQ_DESTINATION
99 },
100 [1] = { /* Tsi108/109 PIC */
101 TSI108_GREG_BASE,
102 TSI108_GREG_FEATURE_0,
103 TSI108_GREG_GLOBAL_CONF_0,
104 TSI108_GREG_VENDOR_ID,
105 TSI108_GREG_IPI_VECTOR_PRI_0,
106 TSI108_GREG_IPI_STRIDE,
107 TSI108_GREG_SPURIOUS,
108 TSI108_GREG_TIMER_FREQ,
109
110 TSI108_TIMER_BASE,
111 TSI108_TIMER_STRIDE,
112 TSI108_TIMER_CURRENT_CNT,
113 TSI108_TIMER_BASE_CNT,
114 TSI108_TIMER_VECTOR_PRI,
115 TSI108_TIMER_DESTINATION,
116
117 TSI108_CPU_BASE,
118 TSI108_CPU_STRIDE,
119 TSI108_CPU_IPI_DISPATCH_0,
120 TSI108_CPU_IPI_DISPATCH_STRIDE,
121 TSI108_CPU_CURRENT_TASK_PRI,
122 TSI108_CPU_WHOAMI,
123 TSI108_CPU_INTACK,
124 TSI108_CPU_EOI,
f365355e 125 TSI108_CPU_MCACK,
7233593b
ZR		 126
127 TSI108_IRQ_BASE,
128 TSI108_IRQ_STRIDE,
129 TSI108_IRQ_VECTOR_PRI,
130 TSI108_VECPRI_VECTOR_MASK,
131 TSI108_VECPRI_POLARITY_POSITIVE,
132 TSI108_VECPRI_POLARITY_NEGATIVE,
133 TSI108_VECPRI_SENSE_LEVEL,
134 TSI108_VECPRI_SENSE_EDGE,
135 TSI108_VECPRI_POLARITY_MASK,
136 TSI108_VECPRI_SENSE_MASK,
137 TSI108_IRQ_DESTINATION
138 },
139};
140
141#define MPIC_INFO(name) mpic->hw_set[MPIC_IDX_##name]
142
143#else /* CONFIG_MPIC_WEIRD */
144
145#define MPIC_INFO(name) MPIC_##name
146
147#endif /* CONFIG_MPIC_WEIRD */
148
14cf11af
PM		 149/*
150 * Register accessor functions
151 */
152
153
fbf0274e
BH		 154static inline u32 _mpic_read(enum mpic_reg_type type,
155 struct mpic_reg_bank *rb,
156 unsigned int reg)
14cf11af 157{
fbf0274e
BH		 158 switch(type) {
159#ifdef CONFIG_PPC_DCR
160 case mpic_access_dcr:
83f34df4 161 return dcr_read(rb->dhost, reg);
fbf0274e
BH		 162#endif
163 case mpic_access_mmio_be:
164 return in_be32(rb->base + (reg >> 2));
165 case mpic_access_mmio_le:
166 default:
167 return in_le32(rb->base + (reg >> 2));
168 }
14cf11af
PM		 169}
170
fbf0274e
BH		 171static inline void _mpic_write(enum mpic_reg_type type,
172 struct mpic_reg_bank *rb,
173 unsigned int reg, u32 value)
14cf11af 174{
fbf0274e
BH		 175 switch(type) {
176#ifdef CONFIG_PPC_DCR
177 case mpic_access_dcr:
d9d1063d
JB		 178 dcr_write(rb->dhost, reg, value);
179 break;
fbf0274e
BH		 180#endif
181 case mpic_access_mmio_be:
d9d1063d
JB		 182 out_be32(rb->base + (reg >> 2), value);
183 break;
fbf0274e
BH		 184 case mpic_access_mmio_le:
185 default:
d9d1063d
JB		 186 out_le32(rb->base + (reg >> 2), value);
187 break;
fbf0274e 188 }
14cf11af
PM		 189}
190
191static inline u32 _mpic_ipi_read(struct mpic *mpic, unsigned int ipi)
192{
fbf0274e 193 enum mpic_reg_type type = mpic->reg_type;
7233593b
ZR		 194 unsigned int offset = MPIC_INFO(GREG_IPI_VECTOR_PRI_0) +
195 (ipi * MPIC_INFO(GREG_IPI_STRIDE));
14cf11af 196
fbf0274e
BH		 197 if ((mpic->flags & MPIC_BROKEN_IPI) && type == mpic_access_mmio_le)
198 type = mpic_access_mmio_be;
199 return _mpic_read(type, &mpic->gregs, offset);
14cf11af
PM		 200}
201
202static inline void _mpic_ipi_write(struct mpic *mpic, unsigned int ipi, u32 value)
203{
7233593b
ZR		 204 unsigned int offset = MPIC_INFO(GREG_IPI_VECTOR_PRI_0) +
205 (ipi * MPIC_INFO(GREG_IPI_STRIDE));
14cf11af 206
fbf0274e 207 _mpic_write(mpic->reg_type, &mpic->gregs, offset, value);
14cf11af
PM		 208}
209
210static inline u32 _mpic_cpu_read(struct mpic *mpic, unsigned int reg)
211{
212 unsigned int cpu = 0;
213
214 if (mpic->flags & MPIC_PRIMARY)
215 cpu = hard_smp_processor_id();
fbf0274e 216 return _mpic_read(mpic->reg_type, &mpic->cpuregs[cpu], reg);
14cf11af
PM		 217}
218
219static inline void _mpic_cpu_write(struct mpic *mpic, unsigned int reg, u32 value)
220{
221 unsigned int cpu = 0;
222
223 if (mpic->flags & MPIC_PRIMARY)
224 cpu = hard_smp_processor_id();
225
fbf0274e 226 _mpic_write(mpic->reg_type, &mpic->cpuregs[cpu], reg, value);
14cf11af
PM		 227}
228
229static inline u32 _mpic_irq_read(struct mpic *mpic, unsigned int src_no, unsigned int reg)
230{
231 unsigned int isu = src_no >> mpic->isu_shift;
232 unsigned int idx = src_no & mpic->isu_mask;
233
0d72ba93
OJ		 234#ifdef CONFIG_MPIC_BROKEN_REGREAD
235 if (reg == 0)
236 return mpic->isu_reg0_shadow[idx];
237 else
238#endif
239 return _mpic_read(mpic->reg_type, &mpic->isus[isu],
240 reg + (idx * MPIC_INFO(IRQ_STRIDE)));
14cf11af
PM		 241}
242
243static inline void _mpic_irq_write(struct mpic *mpic, unsigned int src_no,
244 unsigned int reg, u32 value)
245{
246 unsigned int isu = src_no >> mpic->isu_shift;
247 unsigned int idx = src_no & mpic->isu_mask;
248
fbf0274e 249 _mpic_write(mpic->reg_type, &mpic->isus[isu],
7233593b 250 reg + (idx * MPIC_INFO(IRQ_STRIDE)), value);
0d72ba93
OJ		 251
252#ifdef CONFIG_MPIC_BROKEN_REGREAD
253 if (reg == 0)
254 mpic->isu_reg0_shadow[idx] = value;
255#endif
14cf11af
PM		 256}
257
fbf0274e
BH		 258#define mpic_read(b,r) _mpic_read(mpic->reg_type,&(b),(r))
259#define mpic_write(b,r,v) _mpic_write(mpic->reg_type,&(b),(r),(v))
14cf11af
PM		 260#define mpic_ipi_read(i) _mpic_ipi_read(mpic,(i))
261#define mpic_ipi_write(i,v) _mpic_ipi_write(mpic,(i),(v))
262#define mpic_cpu_read(i) _mpic_cpu_read(mpic,(i))
263#define mpic_cpu_write(i,v) _mpic_cpu_write(mpic,(i),(v))
264#define mpic_irq_read(s,r) _mpic_irq_read(mpic,(s),(r))
265#define mpic_irq_write(s,r,v) _mpic_irq_write(mpic,(s),(r),(v))
266
267
268/*
269 * Low level utility functions
270 */
271
272
c51a3fdc 273static void _mpic_map_mmio(struct mpic *mpic, phys_addr_t phys_addr,
fbf0274e
BH		 274 struct mpic_reg_bank *rb, unsigned int offset,
275 unsigned int size)
276{
277 rb->base = ioremap(phys_addr + offset, size);
278 BUG_ON(rb->base == NULL);
279}
280
281#ifdef CONFIG_PPC_DCR
282static void _mpic_map_dcr(struct mpic *mpic, struct mpic_reg_bank *rb,
283 unsigned int offset, unsigned int size)
284{
0411a5e2
ME		 285 const u32 *dbasep;
286
287 dbasep = of_get_property(mpic->irqhost->of_node, "dcr-reg", NULL);
288
289 rb->dhost = dcr_map(mpic->irqhost->of_node, *dbasep + offset, size);
fbf0274e
BH		 290 BUG_ON(!DCR_MAP_OK(rb->dhost));
291}
292
c51a3fdc 293static inline void mpic_map(struct mpic *mpic, phys_addr_t phys_addr,
fbf0274e
BH		 294 struct mpic_reg_bank *rb, unsigned int offset,
295 unsigned int size)
296{
297 if (mpic->flags & MPIC_USES_DCR)
298 _mpic_map_dcr(mpic, rb, offset, size);
299 else
300 _mpic_map_mmio(mpic, phys_addr, rb, offset, size);
301}
302#else /* CONFIG_PPC_DCR */
303#define mpic_map(m,p,b,o,s) _mpic_map_mmio(m,p,b,o,s)
304#endif /* !CONFIG_PPC_DCR */
305
306
14cf11af
PM		 307
308/* Check if we have one of those nice broken MPICs with a flipped endian on
309 * reads from IPI registers
310 */
311static void __init mpic_test_broken_ipi(struct mpic *mpic)
312{
313 u32 r;
314
7233593b
ZR		 315 mpic_write(mpic->gregs, MPIC_INFO(GREG_IPI_VECTOR_PRI_0), MPIC_VECPRI_MASK);
316 r = mpic_read(mpic->gregs, MPIC_INFO(GREG_IPI_VECTOR_PRI_0));
14cf11af
PM		 317
318 if (r == le32_to_cpu(MPIC_VECPRI_MASK)) {
319 printk(KERN_INFO "mpic: Detected reversed IPI registers\n");
320 mpic->flags |= MPIC_BROKEN_IPI;
321 }
322}
323
6cfef5b2 324#ifdef CONFIG_MPIC_U3_HT_IRQS
14cf11af
PM		 325
326/* Test if an interrupt is sourced from HyperTransport (used on broken U3s)
327 * to force the edge setting on the MPIC and do the ack workaround.
328 */
1beb6a7d 329static inline int mpic_is_ht_interrupt(struct mpic *mpic, unsigned int source)
14cf11af 330{
1beb6a7d 331 if (source >= 128 || !mpic->fixups)
14cf11af 332 return 0;
1beb6a7d 333 return mpic->fixups[source].base != NULL;
14cf11af
PM		 334}
335
c4b22f26 336
1beb6a7d 337static inline void mpic_ht_end_irq(struct mpic *mpic, unsigned int source)
14cf11af 338{
1beb6a7d 339 struct mpic_irq_fixup *fixup = &mpic->fixups[source];
14cf11af 340
1beb6a7d
BH		 341 if (fixup->applebase) {
342 unsigned int soff = (fixup->index >> 3) & ~3;
343 unsigned int mask = 1U << (fixup->index & 0x1f);
344 writel(mask, fixup->applebase + soff);
345 } else {
346 spin_lock(&mpic->fixup_lock);
347 writeb(0x11 + 2 * fixup->index, fixup->base + 2);
348 writel(fixup->data, fixup->base + 4);
349 spin_unlock(&mpic->fixup_lock);
350 }
14cf11af
PM		 351}
352
1beb6a7d
BH		 353static void mpic_startup_ht_interrupt(struct mpic *mpic, unsigned int source,
354 unsigned int irqflags)
355{
356 struct mpic_irq_fixup *fixup = &mpic->fixups[source];
357 unsigned long flags;
358 u32 tmp;
359
360 if (fixup->base == NULL)
361 return;
362
06fe98e6 363 DBG("startup_ht_interrupt(0x%x, 0x%x) index: %d\n",
1beb6a7d
BH		 364 source, irqflags, fixup->index);
365 spin_lock_irqsave(&mpic->fixup_lock, flags);
366 /* Enable and configure */
367 writeb(0x10 + 2 * fixup->index, fixup->base + 2);
368 tmp = readl(fixup->base + 4);
369 tmp &= ~(0x23U);
370 if (irqflags & IRQ_LEVEL)
371 tmp |= 0x22;
372 writel(tmp, fixup->base + 4);
373 spin_unlock_irqrestore(&mpic->fixup_lock, flags);
3669e930
JB		 374
375#ifdef CONFIG_PM
376 /* use the lowest bit inverted to the actual HW,
377 * set if this fixup was enabled, clear otherwise */
378 mpic->save_data[source].fixup_data = tmp | 1;
379#endif
1beb6a7d
BH		 380}
381
382static void mpic_shutdown_ht_interrupt(struct mpic *mpic, unsigned int source,
383 unsigned int irqflags)
384{
385 struct mpic_irq_fixup *fixup = &mpic->fixups[source];
386 unsigned long flags;
387 u32 tmp;
388
389 if (fixup->base == NULL)
390 return;
391
06fe98e6 392 DBG("shutdown_ht_interrupt(0x%x, 0x%x)\n", source, irqflags);
1beb6a7d
BH		 393
394 /* Disable */
395 spin_lock_irqsave(&mpic->fixup_lock, flags);
396 writeb(0x10 + 2 * fixup->index, fixup->base + 2);
397 tmp = readl(fixup->base + 4);
72b13819 398 tmp |= 1;
1beb6a7d
BH		 399 writel(tmp, fixup->base + 4);
400 spin_unlock_irqrestore(&mpic->fixup_lock, flags);
3669e930
JB		 401
402#ifdef CONFIG_PM
403 /* use the lowest bit inverted to the actual HW,
404 * set if this fixup was enabled, clear otherwise */
405 mpic->save_data[source].fixup_data = tmp & ~1;
406#endif
1beb6a7d 407}
14cf11af 408
812fd1fd
ME		 409#ifdef CONFIG_PCI_MSI
410static void __init mpic_scan_ht_msi(struct mpic *mpic, u8 __iomem *devbase,
411 unsigned int devfn)
412{
413 u8 __iomem *base;
414 u8 pos, flags;
415 u64 addr = 0;
416
417 for (pos = readb(devbase + PCI_CAPABILITY_LIST); pos != 0;
418 pos = readb(devbase + pos + PCI_CAP_LIST_NEXT)) {
419 u8 id = readb(devbase + pos + PCI_CAP_LIST_ID);
420 if (id == PCI_CAP_ID_HT) {
421 id = readb(devbase + pos + 3);
422 if ((id & HT_5BIT_CAP_MASK) == HT_CAPTYPE_MSI_MAPPING)
423 break;
424 }
425 }
426
427 if (pos == 0)
428 return;
429
430 base = devbase + pos;
431
432 flags = readb(base + HT_MSI_FLAGS);
433 if (!(flags & HT_MSI_FLAGS_FIXED)) {
434 addr = readl(base + HT_MSI_ADDR_LO) & HT_MSI_ADDR_LO_MASK;
435 addr = addr | ((u64)readl(base + HT_MSI_ADDR_HI) << 32);
436 }
437
438 printk(KERN_DEBUG "mpic: - HT:%02x.%x %s MSI mapping found @ 0x%lx\n",
439 PCI_SLOT(devfn), PCI_FUNC(devfn),
440 flags & HT_MSI_FLAGS_ENABLE ? "enabled" : "disabled", addr);
441
442 if (!(flags & HT_MSI_FLAGS_ENABLE))
443 writeb(flags | HT_MSI_FLAGS_ENABLE, base + HT_MSI_FLAGS);
444}
445#else
446static void __init mpic_scan_ht_msi(struct mpic *mpic, u8 __iomem *devbase,
447 unsigned int devfn)
448{
449 return;
450}
451#endif
452
1beb6a7d
BH		 453static void __init mpic_scan_ht_pic(struct mpic *mpic, u8 __iomem *devbase,
454 unsigned int devfn, u32 vdid)
14cf11af 455{
c4b22f26 456 int i, irq, n;
1beb6a7d 457 u8 __iomem *base;
14cf11af 458 u32 tmp;
c4b22f26 459 u8 pos;
14cf11af 460
1beb6a7d
BH		 461 for (pos = readb(devbase + PCI_CAPABILITY_LIST); pos != 0;
462 pos = readb(devbase + pos + PCI_CAP_LIST_NEXT)) {
463 u8 id = readb(devbase + pos + PCI_CAP_LIST_ID);
46ff3463 464 if (id == PCI_CAP_ID_HT) {
c4b22f26 465 id = readb(devbase + pos + 3);
beb7cc82 466 if ((id & HT_5BIT_CAP_MASK) == HT_CAPTYPE_IRQ)
c4b22f26
SB		 467 break;
468 }
14cf11af 469 }
c4b22f26
SB		 470 if (pos == 0)
471 return;
472
1beb6a7d
BH		 473 base = devbase + pos;
474 writeb(0x01, base + 2);
475 n = (readl(base + 4) >> 16) & 0xff;
14cf11af 476
1beb6a7d
BH		 477 printk(KERN_INFO "mpic: - HT:%02x.%x [0x%02x] vendor %04x device %04x"
478 " has %d irqs\n",
479 devfn >> 3, devfn & 0x7, pos, vdid & 0xffff, vdid >> 16, n + 1);
c4b22f26
SB		 480
481 for (i = 0; i <= n; i++) {
1beb6a7d
BH		 482 writeb(0x10 + 2 * i, base + 2);
483 tmp = readl(base + 4);
14cf11af 484 irq = (tmp >> 16) & 0xff;
1beb6a7d
BH		 485 DBG("HT PIC index 0x%x, irq 0x%x, tmp: %08x\n", i, irq, tmp);
486 /* mask it , will be unmasked later */
487 tmp |= 0x1;
488 writel(tmp, base + 4);
489 mpic->fixups[irq].index = i;
490 mpic->fixups[irq].base = base;
491 /* Apple HT PIC has a non-standard way of doing EOIs */
492 if ((vdid & 0xffff) == 0x106b)
493 mpic->fixups[irq].applebase = devbase + 0x60;
494 else
495 mpic->fixups[irq].applebase = NULL;
496 writeb(0x11 + 2 * i, base + 2);
497 mpic->fixups[irq].data = readl(base + 4) | 0x80000000;
14cf11af
PM		 498 }
499}
500
c4b22f26 501
1beb6a7d 502static void __init mpic_scan_ht_pics(struct mpic *mpic)
14cf11af
PM		 503{
504 unsigned int devfn;
505 u8 __iomem *cfgspace;
506
1beb6a7d 507 printk(KERN_INFO "mpic: Setting up HT PICs workarounds for U3/U4\n");
14cf11af
PM		 508
509 /* Allocate fixups array */
510 mpic->fixups = alloc_bootmem(128 * sizeof(struct mpic_irq_fixup));
511 BUG_ON(mpic->fixups == NULL);
512 memset(mpic->fixups, 0, 128 * sizeof(struct mpic_irq_fixup));
513
514 /* Init spinlock */
515 spin_lock_init(&mpic->fixup_lock);
516
c4b22f26
SB		 517 /* Map U3 config space. We assume all IO-APICs are on the primary bus
518 * so we only need to map 64kB.
14cf11af 519 */
c4b22f26 520 cfgspace = ioremap(0xf2000000, 0x10000);
14cf11af
PM		 521 BUG_ON(cfgspace == NULL);
522
1beb6a7d
BH		 523 /* Now we scan all slots. We do a very quick scan, we read the header
524 * type, vendor ID and device ID only, that's plenty enough
14cf11af 525 */
c4b22f26 526 for (devfn = 0; devfn < 0x100; devfn++) {
14cf11af
PM		 527 u8 __iomem *devbase = cfgspace + (devfn << 8);
528 u8 hdr_type = readb(devbase + PCI_HEADER_TYPE);
529 u32 l = readl(devbase + PCI_VENDOR_ID);
1beb6a7d 530 u16 s;
14cf11af
PM		 531
532 DBG("devfn %x, l: %x\n", devfn, l);
533
534 /* If no device, skip */
535 if (l == 0xffffffff || l == 0x00000000 ||
536 l == 0x0000ffff || l == 0xffff0000)
537 goto next;
1beb6a7d
BH		 538 /* Check if is supports capability lists */
539 s = readw(devbase + PCI_STATUS);
540 if (!(s & PCI_STATUS_CAP_LIST))
541 goto next;
14cf11af 542
1beb6a7d 543 mpic_scan_ht_pic(mpic, devbase, devfn, l);
812fd1fd 544 mpic_scan_ht_msi(mpic, devbase, devfn);
c4b22f26 545
14cf11af
PM		 546 next:
547 /* next device, if function 0 */
c4b22f26 548 if (PCI_FUNC(devfn) == 0 && (hdr_type & 0x80) == 0)
14cf11af
PM		 549 devfn += 7;
550 }
551}
552
6cfef5b2 553#else /* CONFIG_MPIC_U3_HT_IRQS */
6e99e458
BH		 554
555static inline int mpic_is_ht_interrupt(struct mpic *mpic, unsigned int source)
556{
557 return 0;
558}
559
560static void __init mpic_scan_ht_pics(struct mpic *mpic)
561{
562}
563
6cfef5b2 564#endif /* CONFIG_MPIC_U3_HT_IRQS */
14cf11af 565
3c10c9c4
KG		 566#ifdef CONFIG_SMP
567static int irq_choose_cpu(unsigned int virt_irq)
568{
569 cpumask_t mask = irq_desc[virt_irq].affinity;
570 int cpuid;
571
572 if (cpus_equal(mask, CPU_MASK_ALL)) {
573 static int irq_rover;
574 static DEFINE_SPINLOCK(irq_rover_lock);
575 unsigned long flags;
576
577 /* Round-robin distribution... */
578 do_round_robin:
579 spin_lock_irqsave(&irq_rover_lock, flags);
580
581 while (!cpu_online(irq_rover)) {
582 if (++irq_rover >= NR_CPUS)
583 irq_rover = 0;
584 }
585 cpuid = irq_rover;
586 do {
587 if (++irq_rover >= NR_CPUS)
588 irq_rover = 0;
589 } while (!cpu_online(irq_rover));
590
591 spin_unlock_irqrestore(&irq_rover_lock, flags);
592 } else {
593 cpumask_t tmp;
594
595 cpus_and(tmp, cpu_online_map, mask);
596
597 if (cpus_empty(tmp))
598 goto do_round_robin;
599
600 cpuid = first_cpu(tmp);
601 }
602
603 return cpuid;
604}
605#else
606static int irq_choose_cpu(unsigned int virt_irq)
607{
608 return hard_smp_processor_id();
609}
610#endif
14cf11af 611
0ebfff14
BH		 612#define mpic_irq_to_hw(virq) ((unsigned int)irq_map[virq].hwirq)
613
14cf11af
PM		 614/* Find an mpic associated with a given linux interrupt */
615static struct mpic *mpic_find(unsigned int irq, unsigned int *is_ipi)
616{
0ebfff14 617 unsigned int src = mpic_irq_to_hw(irq);
7df2457d 618 struct mpic *mpic;
0ebfff14
BH		 619
620 if (irq < NUM_ISA_INTERRUPTS)
621 return NULL;
7df2457d
OJ		 622
623 mpic = irq_desc[irq].chip_data;
624
0ebfff14 625 if (is_ipi)
7df2457d
OJ		 626 *is_ipi = (src >= mpic->ipi_vecs[0] &&
627 src <= mpic->ipi_vecs[3]);
0ebfff14 628
7df2457d 629 return mpic;
14cf11af
PM		 630}
631
632/* Convert a cpu mask from logical to physical cpu numbers. */
633static inline u32 mpic_physmask(u32 cpumask)
634{
635 int i;
636 u32 mask = 0;
637
638 for (i = 0; i < NR_CPUS; ++i, cpumask >>= 1)
639 mask |= (cpumask & 1) << get_hard_smp_processor_id(i);
640 return mask;
641}
642
643#ifdef CONFIG_SMP
644/* Get the mpic structure from the IPI number */
645static inline struct mpic * mpic_from_ipi(unsigned int ipi)
646{
b9e5b4e6 647 return irq_desc[ipi].chip_data;
14cf11af
PM		 648}
649#endif
650
651/* Get the mpic structure from the irq number */
652static inline struct mpic * mpic_from_irq(unsigned int irq)
653{
b9e5b4e6 654 return irq_desc[irq].chip_data;
14cf11af
PM		 655}
656
657/* Send an EOI */
658static inline void mpic_eoi(struct mpic *mpic)
659{
7233593b
ZR		 660 mpic_cpu_write(MPIC_INFO(CPU_EOI), 0);
661 (void)mpic_cpu_read(MPIC_INFO(CPU_WHOAMI));
14cf11af
PM		 662}
663
664#ifdef CONFIG_SMP
194046a1 665static irqreturn_t mpic_ipi_action(int irq, void *data)
14cf11af 666{
194046a1 667 long ipi = (long)data;
7df2457d 668
194046a1 669 smp_message_recv(ipi);
7df2457d 670
14cf11af
PM		 671 return IRQ_HANDLED;
672}
673#endif /* CONFIG_SMP */
674
675/*
676 * Linux descriptor level callbacks
677 */
678
679
05af7bd2 680void mpic_unmask_irq(unsigned int irq)
14cf11af
PM		 681{
682 unsigned int loops = 100000;
683 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 684 unsigned int src = mpic_irq_to_hw(irq);
14cf11af 685
bd561c79 686 DBG("%p: %s: enable_irq: %d (src %d)\n", mpic, mpic->name, irq, src);
14cf11af 687
7233593b
ZR		 688 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI),
689 mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) &
e5356640 690 ~MPIC_VECPRI_MASK);
14cf11af
PM		 691 /* make sure mask gets to controller before we return to user */
692 do {
693 if (!loops--) {
694 printk(KERN_ERR "mpic_enable_irq timeout\n");
695 break;
696 }
7233593b 697 } while(mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) & MPIC_VECPRI_MASK);
14cf11af
PM		 698}
699
05af7bd2 700void mpic_mask_irq(unsigned int irq)
14cf11af
PM		 701{
702 unsigned int loops = 100000;
703 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 704 unsigned int src = mpic_irq_to_hw(irq);
14cf11af
PM		 705
706 DBG("%s: disable_irq: %d (src %d)\n", mpic->name, irq, src);
707
7233593b
ZR		 708 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI),
709 mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) |
e5356640 710 MPIC_VECPRI_MASK);
14cf11af
PM		 711
712 /* make sure mask gets to controller before we return to user */
713 do {
714 if (!loops--) {
715 printk(KERN_ERR "mpic_enable_irq timeout\n");
716 break;
717 }
7233593b 718 } while(!(mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) & MPIC_VECPRI_MASK));
14cf11af
PM		 719}
720
05af7bd2 721void mpic_end_irq(unsigned int irq)
1beb6a7d 722{
b9e5b4e6
BH		 723 struct mpic *mpic = mpic_from_irq(irq);
724
725#ifdef DEBUG_IRQ
726 DBG("%s: end_irq: %d\n", mpic->name, irq);
727#endif
728 /* We always EOI on end_irq() even for edge interrupts since that
729 * should only lower the priority, the MPIC should have properly
730 * latched another edge interrupt coming in anyway
731 */
732
733 mpic_eoi(mpic);
734}
735
6cfef5b2 736#ifdef CONFIG_MPIC_U3_HT_IRQS
b9e5b4e6
BH		 737
738static void mpic_unmask_ht_irq(unsigned int irq)
739{
1beb6a7d 740 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 741 unsigned int src = mpic_irq_to_hw(irq);
1beb6a7d 742
b9e5b4e6 743 mpic_unmask_irq(irq);
1beb6a7d 744
b9e5b4e6
BH		 745 if (irq_desc[irq].status & IRQ_LEVEL)
746 mpic_ht_end_irq(mpic, src);
747}
748
749static unsigned int mpic_startup_ht_irq(unsigned int irq)
750{
751 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 752 unsigned int src = mpic_irq_to_hw(irq);
1beb6a7d 753
b9e5b4e6
BH		 754 mpic_unmask_irq(irq);
755 mpic_startup_ht_interrupt(mpic, src, irq_desc[irq].status);
756
757 return 0;
1beb6a7d
BH		 758}
759
b9e5b4e6
BH		 760static void mpic_shutdown_ht_irq(unsigned int irq)
761{
762 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 763 unsigned int src = mpic_irq_to_hw(irq);
b9e5b4e6
BH		 764
765 mpic_shutdown_ht_interrupt(mpic, src, irq_desc[irq].status);
766 mpic_mask_irq(irq);
767}
768
769static void mpic_end_ht_irq(unsigned int irq)
14cf11af
PM		 770{
771 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 772 unsigned int src = mpic_irq_to_hw(irq);
14cf11af 773
1beb6a7d 774#ifdef DEBUG_IRQ
14cf11af 775 DBG("%s: end_irq: %d\n", mpic->name, irq);
1beb6a7d 776#endif
14cf11af
PM		 777 /* We always EOI on end_irq() even for edge interrupts since that
778 * should only lower the priority, the MPIC should have properly
779 * latched another edge interrupt coming in anyway
780 */
781
b9e5b4e6
BH		 782 if (irq_desc[irq].status & IRQ_LEVEL)
783 mpic_ht_end_irq(mpic, src);
14cf11af
PM		 784 mpic_eoi(mpic);
785}
6cfef5b2 786#endif /* !CONFIG_MPIC_U3_HT_IRQS */
b9e5b4e6 787
14cf11af
PM		 788#ifdef CONFIG_SMP
789
b9e5b4e6 790static void mpic_unmask_ipi(unsigned int irq)
14cf11af
PM		 791{
792 struct mpic *mpic = mpic_from_ipi(irq);
7df2457d 793 unsigned int src = mpic_irq_to_hw(irq) - mpic->ipi_vecs[0];
14cf11af
PM		 794
795 DBG("%s: enable_ipi: %d (ipi %d)\n", mpic->name, irq, src);
796 mpic_ipi_write(src, mpic_ipi_read(src) & ~MPIC_VECPRI_MASK);
797}
798
b9e5b4e6 799static void mpic_mask_ipi(unsigned int irq)
14cf11af
PM		 800{
801 /* NEVER disable an IPI... that's just plain wrong! */
802}
803
804static void mpic_end_ipi(unsigned int irq)
805{
806 struct mpic *mpic = mpic_from_ipi(irq);
807
808 /*
809 * IPIs are marked IRQ_PER_CPU. This has the side effect of
810 * preventing the IRQ_PENDING/IRQ_INPROGRESS logic from
811 * applying to them. We EOI them late to avoid re-entering.
6714465e 812 * We mark IPI's with IRQF_DISABLED as they must run with
14cf11af
PM		 813 * irqs disabled.
814 */
815 mpic_eoi(mpic);
816}
817
818#endif /* CONFIG_SMP */
819
17b5ee04 820void mpic_set_affinity(unsigned int irq, cpumask_t cpumask)
14cf11af
PM		 821{
822 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 823 unsigned int src = mpic_irq_to_hw(irq);
14cf11af 824
3c10c9c4
KG		 825 if (mpic->flags & MPIC_SINGLE_DEST_CPU) {
826 int cpuid = irq_choose_cpu(irq);
14cf11af 827
3c10c9c4
KG		 828 mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION), 1 << cpuid);
829 } else {
830 cpumask_t tmp;
14cf11af 831
3c10c9c4
KG		 832 cpus_and(tmp, cpumask, cpu_online_map);
833
834 mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
835 mpic_physmask(cpus_addr(tmp)[0]));
836 }
14cf11af
PM		 837}
838
7233593b 839static unsigned int mpic_type_to_vecpri(struct mpic *mpic, unsigned int type)
0ebfff14 840{
0ebfff14 841 /* Now convert sense value */
6e99e458 842 switch(type & IRQ_TYPE_SENSE_MASK) {
0ebfff14 843 case IRQ_TYPE_EDGE_RISING:
7233593b
ZR		 844 return MPIC_INFO(VECPRI_SENSE_EDGE) |
845 MPIC_INFO(VECPRI_POLARITY_POSITIVE);
0ebfff14 846 case IRQ_TYPE_EDGE_FALLING:
6e99e458 847 case IRQ_TYPE_EDGE_BOTH:
7233593b
ZR		 848 return MPIC_INFO(VECPRI_SENSE_EDGE) |
849 MPIC_INFO(VECPRI_POLARITY_NEGATIVE);
0ebfff14 850 case IRQ_TYPE_LEVEL_HIGH:
7233593b
ZR		 851 return MPIC_INFO(VECPRI_SENSE_LEVEL) |
852 MPIC_INFO(VECPRI_POLARITY_POSITIVE);
0ebfff14
BH		 853 case IRQ_TYPE_LEVEL_LOW:
854 default:
7233593b
ZR		 855 return MPIC_INFO(VECPRI_SENSE_LEVEL) |
856 MPIC_INFO(VECPRI_POLARITY_NEGATIVE);
0ebfff14 857 }
6e99e458
BH		 858}
859
05af7bd2 860int mpic_set_irq_type(unsigned int virq, unsigned int flow_type)
6e99e458
BH		 861{
862 struct mpic *mpic = mpic_from_irq(virq);
863 unsigned int src = mpic_irq_to_hw(virq);
864 struct irq_desc *desc = get_irq_desc(virq);
865 unsigned int vecpri, vold, vnew;
866
06fe98e6
BH		 867 DBG("mpic: set_irq_type(mpic:@%p,virq:%d,src:0x%x,type:0x%x)\n",
868 mpic, virq, src, flow_type);
6e99e458
BH		 869
870 if (src >= mpic->irq_count)
871 return -EINVAL;
872
873 if (flow_type == IRQ_TYPE_NONE)
874 if (mpic->senses && src < mpic->senses_count)
875 flow_type = mpic->senses[src];
876 if (flow_type == IRQ_TYPE_NONE)
877 flow_type = IRQ_TYPE_LEVEL_LOW;
878
879 desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
880 desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
881 if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
882 desc->status |= IRQ_LEVEL;
883
884 if (mpic_is_ht_interrupt(mpic, src))
885 vecpri = MPIC_VECPRI_POLARITY_POSITIVE |
886 MPIC_VECPRI_SENSE_EDGE;
887 else
7233593b 888 vecpri = mpic_type_to_vecpri(mpic, flow_type);
6e99e458 889
7233593b
ZR		 890 vold = mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI));
891 vnew = vold & ~(MPIC_INFO(VECPRI_POLARITY_MASK) |
892 MPIC_INFO(VECPRI_SENSE_MASK));
6e99e458
BH		 893 vnew |= vecpri;
894 if (vold != vnew)
7233593b 895 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI), vnew);
6e99e458
BH		 896
897 return 0;
0ebfff14
BH		 898}
899
38958dd9
OJ		 900void mpic_set_vector(unsigned int virq, unsigned int vector)
901{
902 struct mpic *mpic = mpic_from_irq(virq);
903 unsigned int src = mpic_irq_to_hw(virq);
904 unsigned int vecpri;
905
906 DBG("mpic: set_vector(mpic:@%p,virq:%d,src:%d,vector:0x%x)\n",
907 mpic, virq, src, vector);
908
909 if (src >= mpic->irq_count)
910 return;
911
912 vecpri = mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI));
913 vecpri = vecpri & ~MPIC_INFO(VECPRI_VECTOR_MASK);
914 vecpri |= vector;
915 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI), vecpri);
916}
917
b9e5b4e6 918static struct irq_chip mpic_irq_chip = {
6e99e458
BH		 919 .mask = mpic_mask_irq,
920 .unmask = mpic_unmask_irq,
921 .eoi = mpic_end_irq,
922 .set_type = mpic_set_irq_type,
b9e5b4e6
BH		 923};
924
925#ifdef CONFIG_SMP
926static struct irq_chip mpic_ipi_chip = {
6e99e458
BH		 927 .mask = mpic_mask_ipi,
928 .unmask = mpic_unmask_ipi,
929 .eoi = mpic_end_ipi,
b9e5b4e6
BH		 930};
931#endif /* CONFIG_SMP */
932
6cfef5b2 933#ifdef CONFIG_MPIC_U3_HT_IRQS
b9e5b4e6
BH		 934static struct irq_chip mpic_irq_ht_chip = {
935 .startup = mpic_startup_ht_irq,
936 .shutdown = mpic_shutdown_ht_irq,
937 .mask = mpic_mask_irq,
938 .unmask = mpic_unmask_ht_irq,
939 .eoi = mpic_end_ht_irq,
6e99e458 940 .set_type = mpic_set_irq_type,
b9e5b4e6 941};
6cfef5b2 942#endif /* CONFIG_MPIC_U3_HT_IRQS */
b9e5b4e6 943
14cf11af 944
0ebfff14
BH		 945static int mpic_host_match(struct irq_host *h, struct device_node *node)
946{
0ebfff14 947 /* Exact match, unless mpic node is NULL */
52964f87 948 return h->of_node == NULL || h->of_node == node;
0ebfff14
BH		 949}
950
951static int mpic_host_map(struct irq_host *h, unsigned int virq,
6e99e458 952 irq_hw_number_t hw)
0ebfff14 953{
0ebfff14 954 struct mpic *mpic = h->host_data;
6e99e458 955 struct irq_chip *chip;
0ebfff14 956
06fe98e6 957 DBG("mpic: map virq %d, hwirq 0x%lx\n", virq, hw);
0ebfff14 958
7df2457d 959 if (hw == mpic->spurious_vec)
0ebfff14 960 return -EINVAL;
7fd72186
BH		 961 if (mpic->protected && test_bit(hw, mpic->protected))
962 return -EINVAL;
06fe98e6 963
0ebfff14 964#ifdef CONFIG_SMP
7df2457d 965 else if (hw >= mpic->ipi_vecs[0]) {
0ebfff14
BH		 966 WARN_ON(!(mpic->flags & MPIC_PRIMARY));
967
06fe98e6 968 DBG("mpic: mapping as IPI\n");
0ebfff14
BH		 969 set_irq_chip_data(virq, mpic);
970 set_irq_chip_and_handler(virq, &mpic->hc_ipi,
971 handle_percpu_irq);
972 return 0;
973 }
974#endif /* CONFIG_SMP */
975
976 if (hw >= mpic->irq_count)
977 return -EINVAL;
978
a7de7c74
ME		 979 mpic_msi_reserve_hwirq(mpic, hw);
980
6e99e458 981 /* Default chip */
0ebfff14
BH		 982 chip = &mpic->hc_irq;
983
6cfef5b2 984#ifdef CONFIG_MPIC_U3_HT_IRQS
0ebfff14 985 /* Check for HT interrupts, override vecpri */
6e99e458 986 if (mpic_is_ht_interrupt(mpic, hw))
0ebfff14 987 chip = &mpic->hc_ht_irq;
6cfef5b2 988#endif /* CONFIG_MPIC_U3_HT_IRQS */
0ebfff14 989
06fe98e6 990 DBG("mpic: mapping to irq chip @%p\n", chip);
0ebfff14
BH		 991
992 set_irq_chip_data(virq, mpic);
993 set_irq_chip_and_handler(virq, chip, handle_fasteoi_irq);
6e99e458
BH		 994
995 /* Set default irq type */
996 set_irq_type(virq, IRQ_TYPE_NONE);
997
0ebfff14
BH		 998 return 0;
999}
1000
1001static int mpic_host_xlate(struct irq_host *h, struct device_node *ct,
1002 u32 *intspec, unsigned int intsize,
1003 irq_hw_number_t *out_hwirq, unsigned int *out_flags)
1004
1005{
1006 static unsigned char map_mpic_senses[4] = {
1007 IRQ_TYPE_EDGE_RISING,
1008 IRQ_TYPE_LEVEL_LOW,
1009 IRQ_TYPE_LEVEL_HIGH,
1010 IRQ_TYPE_EDGE_FALLING,
1011 };
1012
1013 *out_hwirq = intspec[0];
06fe98e6
BH		 1014 if (intsize > 1) {
1015 u32 mask = 0x3;
1016
1017 /* Apple invented a new race of encoding on machines with
1018 * an HT APIC. They encode, among others, the index within
1019 * the HT APIC. We don't care about it here since thankfully,
1020 * it appears that they have the APIC already properly
1021 * configured, and thus our current fixup code that reads the
1022 * APIC config works fine. However, we still need to mask out
1023 * bits in the specifier to make sure we only get bit 0 which
1024 * is the level/edge bit (the only sense bit exposed by Apple),
1025 * as their bit 1 means something else.
1026 */
1027 if (machine_is(powermac))
1028 mask = 0x1;
1029 *out_flags = map_mpic_senses[intspec[1] & mask];
1030 } else
0ebfff14
BH		 1031 *out_flags = IRQ_TYPE_NONE;
1032
06fe98e6
BH		 1033 DBG("mpic: xlate (%d cells: 0x%08x 0x%08x) to line 0x%lx sense 0x%x\n",
1034 intsize, intspec[0], intspec[1], *out_hwirq, *out_flags);
1035
0ebfff14
BH		 1036 return 0;
1037}
1038
1039static struct irq_host_ops mpic_host_ops = {
1040 .match = mpic_host_match,
1041 .map = mpic_host_map,
1042 .xlate = mpic_host_xlate,
1043};
1044
14cf11af
PM		 1045/*
1046 * Exported functions
1047 */
1048
0ebfff14 1049struct mpic * __init mpic_alloc(struct device_node *node,
a959ff56 1050 phys_addr_t phys_addr,
14cf11af
PM		 1051 unsigned int flags,
1052 unsigned int isu_size,
14cf11af 1053 unsigned int irq_count,
14cf11af
PM		 1054 const char *name)
1055{
1056 struct mpic *mpic;
d9d1063d 1057 u32 greg_feature;
14cf11af
PM		 1058 const char *vers;
1059 int i;
7df2457d 1060 int intvec_top;
a959ff56 1061 u64 paddr = phys_addr;
14cf11af
PM		 1062
1063 mpic = alloc_bootmem(sizeof(struct mpic));
1064 if (mpic == NULL)
1065 return NULL;
1066
14cf11af
PM		 1067 memset(mpic, 0, sizeof(struct mpic));
1068 mpic->name = name;
1069
19fc65b5 1070 mpic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR,
52964f87 1071 isu_size, &mpic_host_ops,
7df2457d 1072 flags & MPIC_LARGE_VECTORS ? 2048 : 256);
19fc65b5 1073 if (mpic->irqhost == NULL)
0ebfff14 1074 return NULL;
0ebfff14
BH		 1075
1076 mpic->irqhost->host_data = mpic;
b9e5b4e6 1077 mpic->hc_irq = mpic_irq_chip;
14cf11af 1078 mpic->hc_irq.typename = name;
14cf11af
PM		 1079 if (flags & MPIC_PRIMARY)
1080 mpic->hc_irq.set_affinity = mpic_set_affinity;
6cfef5b2 1081#ifdef CONFIG_MPIC_U3_HT_IRQS
b9e5b4e6
BH		 1082 mpic->hc_ht_irq = mpic_irq_ht_chip;
1083 mpic->hc_ht_irq.typename = name;
1084 if (flags & MPIC_PRIMARY)
1085 mpic->hc_ht_irq.set_affinity = mpic_set_affinity;
6cfef5b2 1086#endif /* CONFIG_MPIC_U3_HT_IRQS */
fbf0274e 1087
14cf11af 1088#ifdef CONFIG_SMP
b9e5b4e6 1089 mpic->hc_ipi = mpic_ipi_chip;
0ebfff14 1090 mpic->hc_ipi.typename = name;
14cf11af
PM		 1091#endif /* CONFIG_SMP */
1092
1093 mpic->flags = flags;
1094 mpic->isu_size = isu_size;
14cf11af 1095 mpic->irq_count = irq_count;
14cf11af 1096 mpic->num_sources = 0; /* so far */
14cf11af 1097
7df2457d
OJ		 1098 if (flags & MPIC_LARGE_VECTORS)
1099 intvec_top = 2047;
1100 else
1101 intvec_top = 255;
1102
1103 mpic->timer_vecs[0] = intvec_top - 8;
1104 mpic->timer_vecs[1] = intvec_top - 7;
1105 mpic->timer_vecs[2] = intvec_top - 6;
1106 mpic->timer_vecs[3] = intvec_top - 5;
1107 mpic->ipi_vecs[0] = intvec_top - 4;
1108 mpic->ipi_vecs[1] = intvec_top - 3;
1109 mpic->ipi_vecs[2] = intvec_top - 2;
1110 mpic->ipi_vecs[3] = intvec_top - 1;
1111 mpic->spurious_vec = intvec_top;
1112
a959ff56 1113 /* Check for "big-endian" in device-tree */
e2eb6392 1114 if (node && of_get_property(node, "big-endian", NULL) != NULL)
a959ff56
BH		 1115 mpic->flags |= MPIC_BIG_ENDIAN;
1116
7fd72186
BH		 1117 /* Look for protected sources */
1118 if (node) {
d9d1063d
JB		 1119 int psize;
1120 unsigned int bits, mapsize;
7fd72186
BH		 1121 const u32 *psrc =
1122 of_get_property(node, "protected-sources", &psize);
1123 if (psrc) {
1124 psize /= 4;
1125 bits = intvec_top + 1;
1126 mapsize = BITS_TO_LONGS(bits) * sizeof(unsigned long);
1127 mpic->protected = alloc_bootmem(mapsize);
1128 BUG_ON(mpic->protected == NULL);
1129 memset(mpic->protected, 0, mapsize);
1130 for (i = 0; i < psize; i++) {
1131 if (psrc[i] > intvec_top)
1132 continue;
1133 __set_bit(psrc[i], mpic->protected);
1134 }
1135 }
1136 }
a959ff56 1137
7233593b
ZR		 1138#ifdef CONFIG_MPIC_WEIRD
1139 mpic->hw_set = mpic_infos[MPIC_GET_REGSET(flags)];
1140#endif
1141
fbf0274e
BH		 1142 /* default register type */
1143 mpic->reg_type = (flags & MPIC_BIG_ENDIAN) ?
1144 mpic_access_mmio_be : mpic_access_mmio_le;
1145
a959ff56
BH		 1146 /* If no physical address is passed in, a device-node is mandatory */
1147 BUG_ON(paddr == 0 && node == NULL);
1148
1149 /* If no physical address passed in, check if it's dcr based */
0411a5e2 1150 if (paddr == 0 && of_get_property(node, "dcr-reg", NULL) != NULL) {
fbf0274e 1151#ifdef CONFIG_PPC_DCR
0411a5e2 1152 mpic->flags |= MPIC_USES_DCR;
fbf0274e 1153 mpic->reg_type = mpic_access_dcr;
fbf0274e 1154#else
0411a5e2 1155 BUG();
fbf0274e 1156#endif /* CONFIG_PPC_DCR */
0411a5e2 1157 }
fbf0274e 1158
a959ff56
BH		 1159 /* If the MPIC is not DCR based, and no physical address was passed
1160 * in, try to obtain one
1161 */
1162 if (paddr == 0 && !(mpic->flags & MPIC_USES_DCR)) {
d9d1063d 1163 const u32 *reg = of_get_property(node, "reg", NULL);
a959ff56
BH		 1164 BUG_ON(reg == NULL);
1165 paddr = of_translate_address(node, reg);
1166 BUG_ON(paddr == OF_BAD_ADDR);
1167 }
1168
14cf11af 1169 /* Map the global registers */
a959ff56
BH		 1170 mpic_map(mpic, paddr, &mpic->gregs, MPIC_INFO(GREG_BASE), 0x1000);
1171 mpic_map(mpic, paddr, &mpic->tmregs, MPIC_INFO(TIMER_BASE), 0x1000);
14cf11af
PM		 1172
1173 /* Reset */
1174 if (flags & MPIC_WANTS_RESET) {
7233593b
ZR		 1175 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1176 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
14cf11af 1177 | MPIC_GREG_GCONF_RESET);
7233593b 1178 while( mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
14cf11af
PM		 1179 & MPIC_GREG_GCONF_RESET)
1180 mb();
1181 }
1182
f365355e
OJ		 1183 if (flags & MPIC_ENABLE_MCK)
1184 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1185 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
1186 | MPIC_GREG_GCONF_MCK);
1187
14cf11af
PM		 1188 /* Read feature register, calculate num CPUs and, for non-ISU
1189 * MPICs, num sources as well. On ISU MPICs, sources are counted
1190 * as ISUs are added
1191 */
d9d1063d
JB		 1192 greg_feature = mpic_read(mpic->gregs, MPIC_INFO(GREG_FEATURE_0));
1193 mpic->num_cpus = ((greg_feature & MPIC_GREG_FEATURE_LAST_CPU_MASK)
14cf11af 1194 >> MPIC_GREG_FEATURE_LAST_CPU_SHIFT) + 1;
5073e7ee 1195 if (isu_size == 0) {
475ca391
KG		 1196 if (flags & MPIC_BROKEN_FRR_NIRQS)
1197 mpic->num_sources = mpic->irq_count;
1198 else
1199 mpic->num_sources =
1200 ((greg_feature & MPIC_GREG_FEATURE_LAST_SRC_MASK)
1201 >> MPIC_GREG_FEATURE_LAST_SRC_SHIFT) + 1;
5073e7ee 1202 }
14cf11af
PM		 1203
1204 /* Map the per-CPU registers */
1205 for (i = 0; i < mpic->num_cpus; i++) {
a959ff56 1206 mpic_map(mpic, paddr, &mpic->cpuregs[i],
fbf0274e
BH		 1207 MPIC_INFO(CPU_BASE) + i * MPIC_INFO(CPU_STRIDE),
1208 0x1000);
14cf11af
PM		 1209 }
1210
1211 /* Initialize main ISU if none provided */
1212 if (mpic->isu_size == 0) {
1213 mpic->isu_size = mpic->num_sources;
a959ff56 1214 mpic_map(mpic, paddr, &mpic->isus[0],
fbf0274e 1215 MPIC_INFO(IRQ_BASE), MPIC_INFO(IRQ_STRIDE) * mpic->isu_size);
14cf11af
PM		 1216 }
1217 mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1);
1218 mpic->isu_mask = (1 << mpic->isu_shift) - 1;
1219
1220 /* Display version */
d9d1063d 1221 switch (greg_feature & MPIC_GREG_FEATURE_VERSION_MASK) {
14cf11af
PM		 1222 case 1:
1223 vers = "1.0";
1224 break;
1225 case 2:
1226 vers = "1.2";
1227 break;
1228 case 3:
1229 vers = "1.3";
1230 break;
1231 default:
1232 vers = "<unknown>";
1233 break;
1234 }
a959ff56
BH		 1235 printk(KERN_INFO "mpic: Setting up MPIC \"%s\" version %s at %llx,"
1236 " max %d CPUs\n",
1237 name, vers, (unsigned long long)paddr, mpic->num_cpus);
1238 printk(KERN_INFO "mpic: ISU size: %d, shift: %d, mask: %x\n",
1239 mpic->isu_size, mpic->isu_shift, mpic->isu_mask);
14cf11af
PM		 1240
1241 mpic->next = mpics;
1242 mpics = mpic;
1243
0ebfff14 1244 if (flags & MPIC_PRIMARY) {
14cf11af 1245 mpic_primary = mpic;
0ebfff14
BH		 1246 irq_set_default_host(mpic->irqhost);
1247 }
14cf11af
PM		 1248
1249 return mpic;
1250}
1251
1252void __init mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
a959ff56 1253 phys_addr_t paddr)
14cf11af
PM		 1254{
1255 unsigned int isu_first = isu_num * mpic->isu_size;
1256
1257 BUG_ON(isu_num >= MPIC_MAX_ISU);
1258
a959ff56 1259 mpic_map(mpic, paddr, &mpic->isus[isu_num], 0,
fbf0274e 1260 MPIC_INFO(IRQ_STRIDE) * mpic->isu_size);
14cf11af
PM		 1261 if ((isu_first + mpic->isu_size) > mpic->num_sources)
1262 mpic->num_sources = isu_first + mpic->isu_size;
1263}
1264
0ebfff14
BH		 1265void __init mpic_set_default_senses(struct mpic *mpic, u8 *senses, int count)
1266{
1267 mpic->senses = senses;
1268 mpic->senses_count = count;
1269}
1270
14cf11af
PM		 1271void __init mpic_init(struct mpic *mpic)
1272{
1273 int i;
cc353c30 1274 int cpu;
14cf11af
PM		 1275
1276 BUG_ON(mpic->num_sources == 0);
1277
1278 printk(KERN_INFO "mpic: Initializing for %d sources\n", mpic->num_sources);
1279
1280 /* Set current processor priority to max */
7233593b 1281 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0xf);
14cf11af
PM		 1282
1283 /* Initialize timers: just disable them all */
1284 for (i = 0; i < 4; i++) {
1285 mpic_write(mpic->tmregs,
7233593b
ZR		 1286 i * MPIC_INFO(TIMER_STRIDE) +
1287 MPIC_INFO(TIMER_DESTINATION), 0);
14cf11af 1288 mpic_write(mpic->tmregs,
7233593b
ZR		 1289 i * MPIC_INFO(TIMER_STRIDE) +
1290 MPIC_INFO(TIMER_VECTOR_PRI),
14cf11af 1291 MPIC_VECPRI_MASK |
7df2457d 1292 (mpic->timer_vecs[0] + i));
14cf11af
PM		 1293 }
1294
1295 /* Initialize IPIs to our reserved vectors and mark them disabled for now */
1296 mpic_test_broken_ipi(mpic);
1297 for (i = 0; i < 4; i++) {
1298 mpic_ipi_write(i,
1299 MPIC_VECPRI_MASK |
1300 (10 << MPIC_VECPRI_PRIORITY_SHIFT) |
7df2457d 1301 (mpic->ipi_vecs[0] + i));
14cf11af
PM		 1302 }
1303
1304 /* Initialize interrupt sources */
1305 if (mpic->irq_count == 0)
1306 mpic->irq_count = mpic->num_sources;
1307
1beb6a7d 1308 /* Do the HT PIC fixups on U3 broken mpic */
14cf11af 1309 DBG("MPIC flags: %x\n", mpic->flags);
05af7bd2 1310 if ((mpic->flags & MPIC_U3_HT_IRQS) && (mpic->flags & MPIC_PRIMARY)) {
3669e930 1311 mpic_scan_ht_pics(mpic);
05af7bd2
ME		 1312 mpic_u3msi_init(mpic);
1313 }
14cf11af 1314
38958dd9
OJ		 1315 mpic_pasemi_msi_init(mpic);
1316
cc353c30
AB		 1317 if (mpic->flags & MPIC_PRIMARY)
1318 cpu = hard_smp_processor_id();
1319 else
1320 cpu = 0;
1321
14cf11af
PM		 1322 for (i = 0; i < mpic->num_sources; i++) {
1323 /* start with vector = source number, and masked */
6e99e458
BH		 1324 u32 vecpri = MPIC_VECPRI_MASK | i |
1325 (8 << MPIC_VECPRI_PRIORITY_SHIFT);
14cf11af 1326
7fd72186
BH		 1327 /* check if protected */
1328 if (mpic->protected && test_bit(i, mpic->protected))
1329 continue;
14cf11af 1330 /* init hw */
7233593b 1331 mpic_irq_write(i, MPIC_INFO(IRQ_VECTOR_PRI), vecpri);
cc353c30 1332 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION), 1 << cpu);
14cf11af
PM		 1333 }
1334
7df2457d
OJ		 1335 /* Init spurious vector */
1336 mpic_write(mpic->gregs, MPIC_INFO(GREG_SPURIOUS), mpic->spurious_vec);
14cf11af 1337
7233593b
ZR		 1338 /* Disable 8259 passthrough, if supported */
1339 if (!(mpic->flags & MPIC_NO_PTHROU_DIS))
1340 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1341 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
1342 | MPIC_GREG_GCONF_8259_PTHROU_DIS);
14cf11af 1343
d87bf3be
OJ		 1344 if (mpic->flags & MPIC_NO_BIAS)
1345 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1346 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
1347 | MPIC_GREG_GCONF_NO_BIAS);
1348
14cf11af 1349 /* Set current processor priority to 0 */
7233593b 1350 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0);
3669e930
JB		 1351
1352#ifdef CONFIG_PM
1353 /* allocate memory to save mpic state */
1354 mpic->save_data = alloc_bootmem(mpic->num_sources * sizeof(struct mpic_irq_save));
1355 BUG_ON(mpic->save_data == NULL);
1356#endif
14cf11af
PM		 1357}
1358
868ea0c9
MG		 1359void __init mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio)
1360{
1361 u32 v;
1362
1363 v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
1364 v &= ~MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK;
1365 v |= MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(clock_ratio);
1366 mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
1367}
14cf11af 1368
868ea0c9
MG		 1369void __init mpic_set_serial_int(struct mpic *mpic, int enable)
1370{
ba1826e5 1371 unsigned long flags;
868ea0c9
MG		 1372 u32 v;
1373
ba1826e5 1374 spin_lock_irqsave(&mpic_lock, flags);
868ea0c9
MG		 1375 v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
1376 if (enable)
1377 v |= MPIC_GREG_GLOBAL_CONF_1_SIE;
1378 else
1379 v &= ~MPIC_GREG_GLOBAL_CONF_1_SIE;
1380 mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
ba1826e5 1381 spin_unlock_irqrestore(&mpic_lock, flags);
868ea0c9 1382}
14cf11af
PM		 1383
1384void mpic_irq_set_priority(unsigned int irq, unsigned int pri)
1385{
d9d1063d 1386 unsigned int is_ipi;
14cf11af 1387 struct mpic *mpic = mpic_find(irq, &is_ipi);
0ebfff14 1388 unsigned int src = mpic_irq_to_hw(irq);
14cf11af
PM		 1389 unsigned long flags;
1390 u32 reg;
1391
06a901c5
SR		 1392 if (!mpic)
1393 return;
1394
14cf11af
PM		 1395 spin_lock_irqsave(&mpic_lock, flags);
1396 if (is_ipi) {
7df2457d 1397 reg = mpic_ipi_read(src - mpic->ipi_vecs[0]) &
e5356640 1398 ~MPIC_VECPRI_PRIORITY_MASK;
7df2457d 1399 mpic_ipi_write(src - mpic->ipi_vecs[0],
14cf11af
PM		 1400 reg | (pri << MPIC_VECPRI_PRIORITY_SHIFT));
1401 } else {
7233593b 1402 reg = mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI))
e5356640 1403 & ~MPIC_VECPRI_PRIORITY_MASK;
7233593b 1404 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI),
14cf11af
PM		 1405 reg | (pri << MPIC_VECPRI_PRIORITY_SHIFT));
1406 }
1407 spin_unlock_irqrestore(&mpic_lock, flags);
1408}
1409
14cf11af
PM		 1410void mpic_setup_this_cpu(void)
1411{
1412#ifdef CONFIG_SMP
1413 struct mpic *mpic = mpic_primary;
1414 unsigned long flags;
1415 u32 msk = 1 << hard_smp_processor_id();
1416 unsigned int i;
1417
1418 BUG_ON(mpic == NULL);
1419
1420 DBG("%s: setup_this_cpu(%d)\n", mpic->name, hard_smp_processor_id());
1421
1422 spin_lock_irqsave(&mpic_lock, flags);
1423
1424 /* let the mpic know we want intrs. default affinity is 0xffffffff
1425 * until changed via /proc. That's how it's done on x86. If we want
1426 * it differently, then we should make sure we also change the default
a53da52f 1427 * values of irq_desc[].affinity in irq.c.
14cf11af
PM		 1428 */
1429 if (distribute_irqs) {
1430 for (i = 0; i < mpic->num_sources ; i++)
7233593b
ZR		 1431 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
1432 mpic_irq_read(i, MPIC_INFO(IRQ_DESTINATION)) | msk);
14cf11af
PM		 1433 }
1434
1435 /* Set current processor priority to 0 */
7233593b 1436 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0);
14cf11af
PM		 1437
1438 spin_unlock_irqrestore(&mpic_lock, flags);
1439#endif /* CONFIG_SMP */
1440}
1441
1442int mpic_cpu_get_priority(void)
1443{
1444 struct mpic *mpic = mpic_primary;
1445
7233593b 1446 return mpic_cpu_read(MPIC_INFO(CPU_CURRENT_TASK_PRI));
14cf11af
PM		 1447}
1448
1449void mpic_cpu_set_priority(int prio)
1450{
1451 struct mpic *mpic = mpic_primary;
1452
1453 prio &= MPIC_CPU_TASKPRI_MASK;
7233593b 1454 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), prio);
14cf11af
PM		 1455}
1456
14cf11af
PM		 1457void mpic_teardown_this_cpu(int secondary)
1458{
1459 struct mpic *mpic = mpic_primary;
1460 unsigned long flags;
1461 u32 msk = 1 << hard_smp_processor_id();
1462 unsigned int i;
1463
1464 BUG_ON(mpic == NULL);
1465
1466 DBG("%s: teardown_this_cpu(%d)\n", mpic->name, hard_smp_processor_id());
1467 spin_lock_irqsave(&mpic_lock, flags);
1468
1469 /* let the mpic know we don't want intrs. */
1470 for (i = 0; i < mpic->num_sources ; i++)
7233593b
ZR		 1471 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
1472 mpic_irq_read(i, MPIC_INFO(IRQ_DESTINATION)) & ~msk);
14cf11af
PM		 1473
1474 /* Set current processor priority to max */
7233593b 1475 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0xf);
7132799b
VB		 1476 /* We need to EOI the IPI since not all platforms reset the MPIC
1477 * on boot and new interrupts wouldn't get delivered otherwise.
1478 */
1479 mpic_eoi(mpic);
14cf11af
PM		 1480
1481 spin_unlock_irqrestore(&mpic_lock, flags);
1482}
1483
1484
1485void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask)
1486{
1487 struct mpic *mpic = mpic_primary;
1488
1489 BUG_ON(mpic == NULL);
1490
1beb6a7d 1491#ifdef DEBUG_IPI
14cf11af 1492 DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, ipi_no);
1beb6a7d 1493#endif
14cf11af 1494
7233593b
ZR		 1495 mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
1496 ipi_no * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE),
14cf11af
PM		 1497 mpic_physmask(cpu_mask & cpus_addr(cpu_online_map)[0]));
1498}
1499
f365355e 1500static unsigned int _mpic_get_one_irq(struct mpic *mpic, int reg)
14cf11af 1501{
0ebfff14 1502 u32 src;
14cf11af 1503
f365355e 1504 src = mpic_cpu_read(reg) & MPIC_INFO(VECPRI_VECTOR_MASK);
1beb6a7d 1505#ifdef DEBUG_LOW
f365355e 1506 DBG("%s: get_one_irq(reg 0x%x): %d\n", mpic->name, reg, src);
1beb6a7d 1507#endif
5cddd2e3
JB		 1508 if (unlikely(src == mpic->spurious_vec)) {
1509 if (mpic->flags & MPIC_SPV_EOI)
1510 mpic_eoi(mpic);
0ebfff14 1511 return NO_IRQ;
5cddd2e3 1512 }
7fd72186
BH		 1513 if (unlikely(mpic->protected && test_bit(src, mpic->protected))) {
1514 if (printk_ratelimit())
1515 printk(KERN_WARNING "%s: Got protected source %d !\n",
1516 mpic->name, (int)src);
1517 mpic_eoi(mpic);
1518 return NO_IRQ;
1519 }
1520
0ebfff14 1521 return irq_linear_revmap(mpic->irqhost, src);
14cf11af
PM		 1522}
1523
f365355e
OJ		 1524unsigned int mpic_get_one_irq(struct mpic *mpic)
1525{
1526 return _mpic_get_one_irq(mpic, MPIC_INFO(CPU_INTACK));
1527}
1528
35a84c2f 1529unsigned int mpic_get_irq(void)
14cf11af
PM		 1530{
1531 struct mpic *mpic = mpic_primary;
1532
1533 BUG_ON(mpic == NULL);
1534
35a84c2f 1535 return mpic_get_one_irq(mpic);
14cf11af
PM		 1536}
1537
f365355e
OJ		 1538unsigned int mpic_get_mcirq(void)
1539{
1540 struct mpic *mpic = mpic_primary;
1541
1542 BUG_ON(mpic == NULL);
1543
1544 return _mpic_get_one_irq(mpic, MPIC_INFO(CPU_MCACK));
1545}
14cf11af
PM		 1546
1547#ifdef CONFIG_SMP
1548void mpic_request_ipis(void)
1549{
1550 struct mpic *mpic = mpic_primary;
194046a1 1551 long i, err;
0ebfff14
BH		 1552 static char *ipi_names[] = {
1553 "IPI0 (call function)",
1554 "IPI1 (reschedule)",
b7d7a240 1555 "IPI2 (call function single)",
0ebfff14
BH		 1556 "IPI3 (debugger break)",
1557 };
14cf11af 1558 BUG_ON(mpic == NULL);
14cf11af 1559
0ebfff14
BH		 1560 printk(KERN_INFO "mpic: requesting IPIs ... \n");
1561
1562 for (i = 0; i < 4; i++) {
1563 unsigned int vipi = irq_create_mapping(mpic->irqhost,
7df2457d 1564 mpic->ipi_vecs[0] + i);
0ebfff14 1565 if (vipi == NO_IRQ) {
194046a1 1566 printk(KERN_ERR "Failed to map IPI %ld\n", i);
0ebfff14
BH		 1567 break;
1568 }
d16f1b64
OJ		 1569 err = request_irq(vipi, mpic_ipi_action,
1570 IRQF_DISABLED|IRQF_PERCPU,
194046a1 1571 ipi_names[i], (void *)i);
d16f1b64 1572 if (err) {
194046a1 1573 printk(KERN_ERR "Request of irq %d for IPI %ld failed\n",
d16f1b64
OJ		 1574 vipi, i);
1575 break;
1576 }
0ebfff14 1577 }
14cf11af 1578}
a9c59264
PM		 1579
1580void smp_mpic_message_pass(int target, int msg)
1581{
1582 /* make sure we're sending something that translates to an IPI */
1583 if ((unsigned int)msg > 3) {
1584 printk("SMP %d: smp_message_pass: unknown msg %d\n",
1585 smp_processor_id(), msg);
1586 return;
1587 }
1588 switch (target) {
1589 case MSG_ALL:
1590 mpic_send_ipi(msg, 0xffffffff);
1591 break;
1592 case MSG_ALL_BUT_SELF:
1593 mpic_send_ipi(msg, 0xffffffff & ~(1 << smp_processor_id()));
1594 break;
1595 default:
1596 mpic_send_ipi(msg, 1 << target);
1597 break;
1598 }
1599}
775aeff4
ME		 1600
1601int __init smp_mpic_probe(void)
1602{
1603 int nr_cpus;
1604
1605 DBG("smp_mpic_probe()...\n");
1606
1607 nr_cpus = cpus_weight(cpu_possible_map);
1608
1609 DBG("nr_cpus: %d\n", nr_cpus);
1610
1611 if (nr_cpus > 1)
1612 mpic_request_ipis();
1613
1614 return nr_cpus;
1615}
1616
1617void __devinit smp_mpic_setup_cpu(int cpu)
1618{
1619 mpic_setup_this_cpu();
1620}
14cf11af 1621#endif /* CONFIG_SMP */
3669e930
JB		 1622
1623#ifdef CONFIG_PM
1624static int mpic_suspend(struct sys_device *dev, pm_message_t state)
1625{
1626 struct mpic *mpic = container_of(dev, struct mpic, sysdev);
1627 int i;
1628
1629 for (i = 0; i < mpic->num_sources; i++) {
1630 mpic->save_data[i].vecprio =
1631 mpic_irq_read(i, MPIC_INFO(IRQ_VECTOR_PRI));
1632 mpic->save_data[i].dest =
1633 mpic_irq_read(i, MPIC_INFO(IRQ_DESTINATION));
1634 }
1635
1636 return 0;
1637}
1638
1639static int mpic_resume(struct sys_device *dev)
1640{
1641 struct mpic *mpic = container_of(dev, struct mpic, sysdev);
1642 int i;
1643
1644 for (i = 0; i < mpic->num_sources; i++) {
1645 mpic_irq_write(i, MPIC_INFO(IRQ_VECTOR_PRI),
1646 mpic->save_data[i].vecprio);
1647 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
1648 mpic->save_data[i].dest);
1649
1650#ifdef CONFIG_MPIC_U3_HT_IRQS
1651 {
1652 struct mpic_irq_fixup *fixup = &mpic->fixups[i];
1653
1654 if (fixup->base) {
1655 /* we use the lowest bit in an inverted meaning */
1656 if ((mpic->save_data[i].fixup_data & 1) == 0)
1657 continue;
1658
1659 /* Enable and configure */
1660 writeb(0x10 + 2 * fixup->index, fixup->base + 2);
1661
1662 writel(mpic->save_data[i].fixup_data & ~1,
1663 fixup->base + 4);
1664 }
1665 }
1666#endif
1667 } /* end for loop */
1668
1669 return 0;
1670}
1671#endif
1672
1673static struct sysdev_class mpic_sysclass = {
1674#ifdef CONFIG_PM
1675 .resume = mpic_resume,
1676 .suspend = mpic_suspend,
1677#endif
af5ca3f4 1678 .name = "mpic",
3669e930
JB		 1679};
1680
1681static int mpic_init_sys(void)
1682{
1683 struct mpic *mpic = mpics;
1684 int error, id = 0;
1685
1686 error = sysdev_class_register(&mpic_sysclass);
1687
1688 while (mpic && !error) {
1689 mpic->sysdev.cls = &mpic_sysclass;
1690 mpic->sysdev.id = id++;
1691 error = sysdev_register(&mpic->sysdev);
1692 mpic = mpic->next;
1693 }
1694 return error;
1695}
1696
1697device_initcall(mpic_init_sys);
Linux 6.x block layer and io_uring tree(s)