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Merge branch 'topic/cleanup' into for-linus
[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
fe333321 438 printk(KERN_DEBUG "mpic: - HT:%02x.%x %s MSI mapping found @ 0x%llx\n",
812fd1fd
ME		 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{
e65e49d0 569 cpumask_t mask;
3c10c9c4
KG		 570 int cpuid;
571
e65e49d0 572 cpumask_copy(&mask, irq_desc[virt_irq].affinity);
3c10c9c4
KG		 573 if (cpus_equal(mask, CPU_MASK_ALL)) {
574 static int irq_rover;
575 static DEFINE_SPINLOCK(irq_rover_lock);
576 unsigned long flags;
577
578 /* Round-robin distribution... */
579 do_round_robin:
580 spin_lock_irqsave(&irq_rover_lock, flags);
581
582 while (!cpu_online(irq_rover)) {
583 if (++irq_rover >= NR_CPUS)
584 irq_rover = 0;
585 }
586 cpuid = irq_rover;
587 do {
588 if (++irq_rover >= NR_CPUS)
589 irq_rover = 0;
590 } while (!cpu_online(irq_rover));
591
592 spin_unlock_irqrestore(&irq_rover_lock, flags);
593 } else {
594 cpumask_t tmp;
595
596 cpus_and(tmp, cpu_online_map, mask);
597
598 if (cpus_empty(tmp))
599 goto do_round_robin;
600
601 cpuid = first_cpu(tmp);
602 }
603
7a0d7940 604 return get_hard_smp_processor_id(cpuid);
3c10c9c4
KG		 605}
606#else
607static int irq_choose_cpu(unsigned int virt_irq)
608{
609 return hard_smp_processor_id();
610}
611#endif
14cf11af 612
0ebfff14
BH		 613#define mpic_irq_to_hw(virq) ((unsigned int)irq_map[virq].hwirq)
614
14cf11af
PM		 615/* Find an mpic associated with a given linux interrupt */
616static struct mpic *mpic_find(unsigned int irq, unsigned int *is_ipi)
617{
0ebfff14 618 unsigned int src = mpic_irq_to_hw(irq);
7df2457d 619 struct mpic *mpic;
0ebfff14
BH		 620
621 if (irq < NUM_ISA_INTERRUPTS)
622 return NULL;
7df2457d
OJ		 623
624 mpic = irq_desc[irq].chip_data;
625
0ebfff14 626 if (is_ipi)
7df2457d
OJ		 627 *is_ipi = (src >= mpic->ipi_vecs[0] &&
628 src <= mpic->ipi_vecs[3]);
0ebfff14 629
7df2457d 630 return mpic;
14cf11af
PM		 631}
632
633/* Convert a cpu mask from logical to physical cpu numbers. */
634static inline u32 mpic_physmask(u32 cpumask)
635{
636 int i;
637 u32 mask = 0;
638
639 for (i = 0; i < NR_CPUS; ++i, cpumask >>= 1)
640 mask |= (cpumask & 1) << get_hard_smp_processor_id(i);
641 return mask;
642}
643
644#ifdef CONFIG_SMP
645/* Get the mpic structure from the IPI number */
646static inline struct mpic * mpic_from_ipi(unsigned int ipi)
647{
b9e5b4e6 648 return irq_desc[ipi].chip_data;
14cf11af
PM		 649}
650#endif
651
652/* Get the mpic structure from the irq number */
653static inline struct mpic * mpic_from_irq(unsigned int irq)
654{
b9e5b4e6 655 return irq_desc[irq].chip_data;
14cf11af
PM		 656}
657
658/* Send an EOI */
659static inline void mpic_eoi(struct mpic *mpic)
660{
7233593b
ZR		 661 mpic_cpu_write(MPIC_INFO(CPU_EOI), 0);
662 (void)mpic_cpu_read(MPIC_INFO(CPU_WHOAMI));
14cf11af
PM		 663}
664
14cf11af
PM		 665/*
666 * Linux descriptor level callbacks
667 */
668
669
05af7bd2 670void mpic_unmask_irq(unsigned int irq)
14cf11af
PM		 671{
672 unsigned int loops = 100000;
673 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 674 unsigned int src = mpic_irq_to_hw(irq);
14cf11af 675
bd561c79 676 DBG("%p: %s: enable_irq: %d (src %d)\n", mpic, mpic->name, irq, src);
14cf11af 677
7233593b
ZR		 678 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI),
679 mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) &
e5356640 680 ~MPIC_VECPRI_MASK);
14cf11af
PM		 681 /* make sure mask gets to controller before we return to user */
682 do {
683 if (!loops--) {
684 printk(KERN_ERR "mpic_enable_irq timeout\n");
685 break;
686 }
7233593b 687 } while(mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) & MPIC_VECPRI_MASK);
14cf11af
PM		 688}
689
05af7bd2 690void mpic_mask_irq(unsigned int irq)
14cf11af
PM		 691{
692 unsigned int loops = 100000;
693 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 694 unsigned int src = mpic_irq_to_hw(irq);
14cf11af
PM		 695
696 DBG("%s: disable_irq: %d (src %d)\n", mpic->name, irq, src);
697
7233593b
ZR		 698 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI),
699 mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) |
e5356640 700 MPIC_VECPRI_MASK);
14cf11af
PM		 701
702 /* make sure mask gets to controller before we return to user */
703 do {
704 if (!loops--) {
705 printk(KERN_ERR "mpic_enable_irq timeout\n");
706 break;
707 }
7233593b 708 } while(!(mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI)) & MPIC_VECPRI_MASK));
14cf11af
PM		 709}
710
05af7bd2 711void mpic_end_irq(unsigned int irq)
1beb6a7d 712{
b9e5b4e6
BH		 713 struct mpic *mpic = mpic_from_irq(irq);
714
715#ifdef DEBUG_IRQ
716 DBG("%s: end_irq: %d\n", mpic->name, irq);
717#endif
718 /* We always EOI on end_irq() even for edge interrupts since that
719 * should only lower the priority, the MPIC should have properly
720 * latched another edge interrupt coming in anyway
721 */
722
723 mpic_eoi(mpic);
724}
725
6cfef5b2 726#ifdef CONFIG_MPIC_U3_HT_IRQS
b9e5b4e6
BH		 727
728static void mpic_unmask_ht_irq(unsigned int irq)
729{
1beb6a7d 730 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 731 unsigned int src = mpic_irq_to_hw(irq);
1beb6a7d 732
b9e5b4e6 733 mpic_unmask_irq(irq);
1beb6a7d 734
b9e5b4e6
BH		 735 if (irq_desc[irq].status & IRQ_LEVEL)
736 mpic_ht_end_irq(mpic, src);
737}
738
739static unsigned int mpic_startup_ht_irq(unsigned int irq)
740{
741 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 742 unsigned int src = mpic_irq_to_hw(irq);
1beb6a7d 743
b9e5b4e6
BH		 744 mpic_unmask_irq(irq);
745 mpic_startup_ht_interrupt(mpic, src, irq_desc[irq].status);
746
747 return 0;
1beb6a7d
BH		 748}
749
b9e5b4e6
BH		 750static void mpic_shutdown_ht_irq(unsigned int irq)
751{
752 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 753 unsigned int src = mpic_irq_to_hw(irq);
b9e5b4e6
BH		 754
755 mpic_shutdown_ht_interrupt(mpic, src, irq_desc[irq].status);
756 mpic_mask_irq(irq);
757}
758
759static void mpic_end_ht_irq(unsigned int irq)
14cf11af
PM		 760{
761 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 762 unsigned int src = mpic_irq_to_hw(irq);
14cf11af 763
1beb6a7d 764#ifdef DEBUG_IRQ
14cf11af 765 DBG("%s: end_irq: %d\n", mpic->name, irq);
1beb6a7d 766#endif
14cf11af
PM		 767 /* We always EOI on end_irq() even for edge interrupts since that
768 * should only lower the priority, the MPIC should have properly
769 * latched another edge interrupt coming in anyway
770 */
771
b9e5b4e6
BH		 772 if (irq_desc[irq].status & IRQ_LEVEL)
773 mpic_ht_end_irq(mpic, src);
14cf11af
PM		 774 mpic_eoi(mpic);
775}
6cfef5b2 776#endif /* !CONFIG_MPIC_U3_HT_IRQS */
b9e5b4e6 777
14cf11af
PM		 778#ifdef CONFIG_SMP
779
b9e5b4e6 780static void mpic_unmask_ipi(unsigned int irq)
14cf11af
PM		 781{
782 struct mpic *mpic = mpic_from_ipi(irq);
7df2457d 783 unsigned int src = mpic_irq_to_hw(irq) - mpic->ipi_vecs[0];
14cf11af
PM		 784
785 DBG("%s: enable_ipi: %d (ipi %d)\n", mpic->name, irq, src);
786 mpic_ipi_write(src, mpic_ipi_read(src) & ~MPIC_VECPRI_MASK);
787}
788
b9e5b4e6 789static void mpic_mask_ipi(unsigned int irq)
14cf11af
PM		 790{
791 /* NEVER disable an IPI... that's just plain wrong! */
792}
793
794static void mpic_end_ipi(unsigned int irq)
795{
796 struct mpic *mpic = mpic_from_ipi(irq);
797
798 /*
799 * IPIs are marked IRQ_PER_CPU. This has the side effect of
800 * preventing the IRQ_PENDING/IRQ_INPROGRESS logic from
801 * applying to them. We EOI them late to avoid re-entering.
6714465e 802 * We mark IPI's with IRQF_DISABLED as they must run with
14cf11af
PM		 803 * irqs disabled.
804 */
805 mpic_eoi(mpic);
806}
807
808#endif /* CONFIG_SMP */
809
0de26520 810void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
14cf11af
PM		 811{
812 struct mpic *mpic = mpic_from_irq(irq);
0ebfff14 813 unsigned int src = mpic_irq_to_hw(irq);
14cf11af 814
3c10c9c4
KG		 815 if (mpic->flags & MPIC_SINGLE_DEST_CPU) {
816 int cpuid = irq_choose_cpu(irq);
14cf11af 817
3c10c9c4
KG		 818 mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION), 1 << cpuid);
819 } else {
820 cpumask_t tmp;
14cf11af 821
0de26520 822 cpumask_and(&tmp, cpumask, cpu_online_mask);
3c10c9c4
KG		 823
824 mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
825 mpic_physmask(cpus_addr(tmp)[0]));
826 }
14cf11af
PM		 827}
828
7233593b 829static unsigned int mpic_type_to_vecpri(struct mpic *mpic, unsigned int type)
0ebfff14 830{
0ebfff14 831 /* Now convert sense value */
6e99e458 832 switch(type & IRQ_TYPE_SENSE_MASK) {
0ebfff14 833 case IRQ_TYPE_EDGE_RISING:
7233593b
ZR		 834 return MPIC_INFO(VECPRI_SENSE_EDGE) |
835 MPIC_INFO(VECPRI_POLARITY_POSITIVE);
0ebfff14 836 case IRQ_TYPE_EDGE_FALLING:
6e99e458 837 case IRQ_TYPE_EDGE_BOTH:
7233593b
ZR		 838 return MPIC_INFO(VECPRI_SENSE_EDGE) |
839 MPIC_INFO(VECPRI_POLARITY_NEGATIVE);
0ebfff14 840 case IRQ_TYPE_LEVEL_HIGH:
7233593b
ZR		 841 return MPIC_INFO(VECPRI_SENSE_LEVEL) |
842 MPIC_INFO(VECPRI_POLARITY_POSITIVE);
0ebfff14
BH		 843 case IRQ_TYPE_LEVEL_LOW:
844 default:
7233593b
ZR		 845 return MPIC_INFO(VECPRI_SENSE_LEVEL) |
846 MPIC_INFO(VECPRI_POLARITY_NEGATIVE);
0ebfff14 847 }
6e99e458
BH		 848}
849
05af7bd2 850int mpic_set_irq_type(unsigned int virq, unsigned int flow_type)
6e99e458
BH		 851{
852 struct mpic *mpic = mpic_from_irq(virq);
853 unsigned int src = mpic_irq_to_hw(virq);
854 struct irq_desc *desc = get_irq_desc(virq);
855 unsigned int vecpri, vold, vnew;
856
06fe98e6
BH		 857 DBG("mpic: set_irq_type(mpic:@%p,virq:%d,src:0x%x,type:0x%x)\n",
858 mpic, virq, src, flow_type);
6e99e458
BH		 859
860 if (src >= mpic->irq_count)
861 return -EINVAL;
862
863 if (flow_type == IRQ_TYPE_NONE)
864 if (mpic->senses && src < mpic->senses_count)
865 flow_type = mpic->senses[src];
866 if (flow_type == IRQ_TYPE_NONE)
867 flow_type = IRQ_TYPE_LEVEL_LOW;
868
869 desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
870 desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
871 if (flow_type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
872 desc->status |= IRQ_LEVEL;
873
874 if (mpic_is_ht_interrupt(mpic, src))
875 vecpri = MPIC_VECPRI_POLARITY_POSITIVE |
876 MPIC_VECPRI_SENSE_EDGE;
877 else
7233593b 878 vecpri = mpic_type_to_vecpri(mpic, flow_type);
6e99e458 879
7233593b
ZR		 880 vold = mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI));
881 vnew = vold & ~(MPIC_INFO(VECPRI_POLARITY_MASK) |
882 MPIC_INFO(VECPRI_SENSE_MASK));
6e99e458
BH		 883 vnew |= vecpri;
884 if (vold != vnew)
7233593b 885 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI), vnew);
6e99e458
BH		 886
887 return 0;
0ebfff14
BH		 888}
889
38958dd9
OJ		 890void mpic_set_vector(unsigned int virq, unsigned int vector)
891{
892 struct mpic *mpic = mpic_from_irq(virq);
893 unsigned int src = mpic_irq_to_hw(virq);
894 unsigned int vecpri;
895
896 DBG("mpic: set_vector(mpic:@%p,virq:%d,src:%d,vector:0x%x)\n",
897 mpic, virq, src, vector);
898
899 if (src >= mpic->irq_count)
900 return;
901
902 vecpri = mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI));
903 vecpri = vecpri & ~MPIC_INFO(VECPRI_VECTOR_MASK);
904 vecpri |= vector;
905 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI), vecpri);
906}
907
b9e5b4e6 908static struct irq_chip mpic_irq_chip = {
6e99e458
BH		 909 .mask = mpic_mask_irq,
910 .unmask = mpic_unmask_irq,
911 .eoi = mpic_end_irq,
912 .set_type = mpic_set_irq_type,
b9e5b4e6
BH		 913};
914
915#ifdef CONFIG_SMP
916static struct irq_chip mpic_ipi_chip = {
6e99e458
BH		 917 .mask = mpic_mask_ipi,
918 .unmask = mpic_unmask_ipi,
919 .eoi = mpic_end_ipi,
b9e5b4e6
BH		 920};
921#endif /* CONFIG_SMP */
922
6cfef5b2 923#ifdef CONFIG_MPIC_U3_HT_IRQS
b9e5b4e6
BH		 924static struct irq_chip mpic_irq_ht_chip = {
925 .startup = mpic_startup_ht_irq,
926 .shutdown = mpic_shutdown_ht_irq,
927 .mask = mpic_mask_irq,
928 .unmask = mpic_unmask_ht_irq,
929 .eoi = mpic_end_ht_irq,
6e99e458 930 .set_type = mpic_set_irq_type,
b9e5b4e6 931};
6cfef5b2 932#endif /* CONFIG_MPIC_U3_HT_IRQS */
b9e5b4e6 933
14cf11af 934
0ebfff14
BH		 935static int mpic_host_match(struct irq_host *h, struct device_node *node)
936{
0ebfff14 937 /* Exact match, unless mpic node is NULL */
52964f87 938 return h->of_node == NULL || h->of_node == node;
0ebfff14
BH		 939}
940
941static int mpic_host_map(struct irq_host *h, unsigned int virq,
6e99e458 942 irq_hw_number_t hw)
0ebfff14 943{
0ebfff14 944 struct mpic *mpic = h->host_data;
6e99e458 945 struct irq_chip *chip;
0ebfff14 946
06fe98e6 947 DBG("mpic: map virq %d, hwirq 0x%lx\n", virq, hw);
0ebfff14 948
7df2457d 949 if (hw == mpic->spurious_vec)
0ebfff14 950 return -EINVAL;
7fd72186
BH		 951 if (mpic->protected && test_bit(hw, mpic->protected))
952 return -EINVAL;
06fe98e6 953
0ebfff14 954#ifdef CONFIG_SMP
7df2457d 955 else if (hw >= mpic->ipi_vecs[0]) {
0ebfff14
BH		 956 WARN_ON(!(mpic->flags & MPIC_PRIMARY));
957
06fe98e6 958 DBG("mpic: mapping as IPI\n");
0ebfff14
BH		 959 set_irq_chip_data(virq, mpic);
960 set_irq_chip_and_handler(virq, &mpic->hc_ipi,
961 handle_percpu_irq);
962 return 0;
963 }
964#endif /* CONFIG_SMP */
965
966 if (hw >= mpic->irq_count)
967 return -EINVAL;
968
a7de7c74
ME		 969 mpic_msi_reserve_hwirq(mpic, hw);
970
6e99e458 971 /* Default chip */
0ebfff14
BH		 972 chip = &mpic->hc_irq;
973
6cfef5b2 974#ifdef CONFIG_MPIC_U3_HT_IRQS
0ebfff14 975 /* Check for HT interrupts, override vecpri */
6e99e458 976 if (mpic_is_ht_interrupt(mpic, hw))
0ebfff14 977 chip = &mpic->hc_ht_irq;
6cfef5b2 978#endif /* CONFIG_MPIC_U3_HT_IRQS */
0ebfff14 979
06fe98e6 980 DBG("mpic: mapping to irq chip @%p\n", chip);
0ebfff14
BH		 981
982 set_irq_chip_data(virq, mpic);
983 set_irq_chip_and_handler(virq, chip, handle_fasteoi_irq);
6e99e458
BH		 984
985 /* Set default irq type */
986 set_irq_type(virq, IRQ_TYPE_NONE);
987
0ebfff14
BH		 988 return 0;
989}
990
991static int mpic_host_xlate(struct irq_host *h, struct device_node *ct,
992 u32 *intspec, unsigned int intsize,
993 irq_hw_number_t *out_hwirq, unsigned int *out_flags)
994
995{
996 static unsigned char map_mpic_senses[4] = {
997 IRQ_TYPE_EDGE_RISING,
998 IRQ_TYPE_LEVEL_LOW,
999 IRQ_TYPE_LEVEL_HIGH,
1000 IRQ_TYPE_EDGE_FALLING,
1001 };
1002
1003 *out_hwirq = intspec[0];
06fe98e6
BH		 1004 if (intsize > 1) {
1005 u32 mask = 0x3;
1006
1007 /* Apple invented a new race of encoding on machines with
1008 * an HT APIC. They encode, among others, the index within
1009 * the HT APIC. We don't care about it here since thankfully,
1010 * it appears that they have the APIC already properly
1011 * configured, and thus our current fixup code that reads the
1012 * APIC config works fine. However, we still need to mask out
1013 * bits in the specifier to make sure we only get bit 0 which
1014 * is the level/edge bit (the only sense bit exposed by Apple),
1015 * as their bit 1 means something else.
1016 */
1017 if (machine_is(powermac))
1018 mask = 0x1;
1019 *out_flags = map_mpic_senses[intspec[1] & mask];
1020 } else
0ebfff14
BH		 1021 *out_flags = IRQ_TYPE_NONE;
1022
06fe98e6
BH		 1023 DBG("mpic: xlate (%d cells: 0x%08x 0x%08x) to line 0x%lx sense 0x%x\n",
1024 intsize, intspec[0], intspec[1], *out_hwirq, *out_flags);
1025
0ebfff14
BH		 1026 return 0;
1027}
1028
1029static struct irq_host_ops mpic_host_ops = {
1030 .match = mpic_host_match,
1031 .map = mpic_host_map,
1032 .xlate = mpic_host_xlate,
1033};
1034
14cf11af
PM		 1035/*
1036 * Exported functions
1037 */
1038
0ebfff14 1039struct mpic * __init mpic_alloc(struct device_node *node,
a959ff56 1040 phys_addr_t phys_addr,
14cf11af
PM		 1041 unsigned int flags,
1042 unsigned int isu_size,
14cf11af 1043 unsigned int irq_count,
14cf11af
PM		 1044 const char *name)
1045{
1046 struct mpic *mpic;
d9d1063d 1047 u32 greg_feature;
14cf11af
PM		 1048 const char *vers;
1049 int i;
7df2457d 1050 int intvec_top;
a959ff56 1051 u64 paddr = phys_addr;
14cf11af
PM		 1052
1053 mpic = alloc_bootmem(sizeof(struct mpic));
1054 if (mpic == NULL)
1055 return NULL;
1056
14cf11af
PM		 1057 memset(mpic, 0, sizeof(struct mpic));
1058 mpic->name = name;
1059
b9e5b4e6 1060 mpic->hc_irq = mpic_irq_chip;
14cf11af 1061 mpic->hc_irq.typename = name;
14cf11af
PM		 1062 if (flags & MPIC_PRIMARY)
1063 mpic->hc_irq.set_affinity = mpic_set_affinity;
6cfef5b2 1064#ifdef CONFIG_MPIC_U3_HT_IRQS
b9e5b4e6
BH		 1065 mpic->hc_ht_irq = mpic_irq_ht_chip;
1066 mpic->hc_ht_irq.typename = name;
1067 if (flags & MPIC_PRIMARY)
1068 mpic->hc_ht_irq.set_affinity = mpic_set_affinity;
6cfef5b2 1069#endif /* CONFIG_MPIC_U3_HT_IRQS */
fbf0274e 1070
14cf11af 1071#ifdef CONFIG_SMP
b9e5b4e6 1072 mpic->hc_ipi = mpic_ipi_chip;
0ebfff14 1073 mpic->hc_ipi.typename = name;
14cf11af
PM		 1074#endif /* CONFIG_SMP */
1075
1076 mpic->flags = flags;
1077 mpic->isu_size = isu_size;
14cf11af 1078 mpic->irq_count = irq_count;
14cf11af 1079 mpic->num_sources = 0; /* so far */
14cf11af 1080
7df2457d
OJ		 1081 if (flags & MPIC_LARGE_VECTORS)
1082 intvec_top = 2047;
1083 else
1084 intvec_top = 255;
1085
1086 mpic->timer_vecs[0] = intvec_top - 8;
1087 mpic->timer_vecs[1] = intvec_top - 7;
1088 mpic->timer_vecs[2] = intvec_top - 6;
1089 mpic->timer_vecs[3] = intvec_top - 5;
1090 mpic->ipi_vecs[0] = intvec_top - 4;
1091 mpic->ipi_vecs[1] = intvec_top - 3;
1092 mpic->ipi_vecs[2] = intvec_top - 2;
1093 mpic->ipi_vecs[3] = intvec_top - 1;
1094 mpic->spurious_vec = intvec_top;
1095
a959ff56 1096 /* Check for "big-endian" in device-tree */
e2eb6392 1097 if (node && of_get_property(node, "big-endian", NULL) != NULL)
a959ff56
BH		 1098 mpic->flags |= MPIC_BIG_ENDIAN;
1099
7fd72186
BH		 1100 /* Look for protected sources */
1101 if (node) {
d9d1063d
JB		 1102 int psize;
1103 unsigned int bits, mapsize;
7fd72186
BH		 1104 const u32 *psrc =
1105 of_get_property(node, "protected-sources", &psize);
1106 if (psrc) {
1107 psize /= 4;
1108 bits = intvec_top + 1;
1109 mapsize = BITS_TO_LONGS(bits) * sizeof(unsigned long);
1110 mpic->protected = alloc_bootmem(mapsize);
1111 BUG_ON(mpic->protected == NULL);
1112 memset(mpic->protected, 0, mapsize);
1113 for (i = 0; i < psize; i++) {
1114 if (psrc[i] > intvec_top)
1115 continue;
1116 __set_bit(psrc[i], mpic->protected);
1117 }
1118 }
1119 }
a959ff56 1120
7233593b
ZR		 1121#ifdef CONFIG_MPIC_WEIRD
1122 mpic->hw_set = mpic_infos[MPIC_GET_REGSET(flags)];
1123#endif
1124
fbf0274e
BH		 1125 /* default register type */
1126 mpic->reg_type = (flags & MPIC_BIG_ENDIAN) ?
1127 mpic_access_mmio_be : mpic_access_mmio_le;
1128
a959ff56
BH		 1129 /* If no physical address is passed in, a device-node is mandatory */
1130 BUG_ON(paddr == 0 && node == NULL);
1131
1132 /* If no physical address passed in, check if it's dcr based */
0411a5e2 1133 if (paddr == 0 && of_get_property(node, "dcr-reg", NULL) != NULL) {
fbf0274e 1134#ifdef CONFIG_PPC_DCR
0411a5e2 1135 mpic->flags |= MPIC_USES_DCR;
fbf0274e 1136 mpic->reg_type = mpic_access_dcr;
fbf0274e 1137#else
0411a5e2 1138 BUG();
fbf0274e 1139#endif /* CONFIG_PPC_DCR */
0411a5e2 1140 }
fbf0274e 1141
a959ff56
BH		 1142 /* If the MPIC is not DCR based, and no physical address was passed
1143 * in, try to obtain one
1144 */
1145 if (paddr == 0 && !(mpic->flags & MPIC_USES_DCR)) {
d9d1063d 1146 const u32 *reg = of_get_property(node, "reg", NULL);
a959ff56
BH		 1147 BUG_ON(reg == NULL);
1148 paddr = of_translate_address(node, reg);
1149 BUG_ON(paddr == OF_BAD_ADDR);
1150 }
1151
14cf11af 1152 /* Map the global registers */
a959ff56
BH		 1153 mpic_map(mpic, paddr, &mpic->gregs, MPIC_INFO(GREG_BASE), 0x1000);
1154 mpic_map(mpic, paddr, &mpic->tmregs, MPIC_INFO(TIMER_BASE), 0x1000);
14cf11af
PM		 1155
1156 /* Reset */
1157 if (flags & MPIC_WANTS_RESET) {
7233593b
ZR		 1158 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1159 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
14cf11af 1160 | MPIC_GREG_GCONF_RESET);
7233593b 1161 while( mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
14cf11af
PM		 1162 & MPIC_GREG_GCONF_RESET)
1163 mb();
1164 }
1165
d91e4ea7
KG		 1166 /* CoreInt */
1167 if (flags & MPIC_ENABLE_COREINT)
1168 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1169 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
1170 | MPIC_GREG_GCONF_COREINT);
1171
f365355e
OJ		 1172 if (flags & MPIC_ENABLE_MCK)
1173 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1174 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
1175 | MPIC_GREG_GCONF_MCK);
1176
14cf11af
PM		 1177 /* Read feature register, calculate num CPUs and, for non-ISU
1178 * MPICs, num sources as well. On ISU MPICs, sources are counted
1179 * as ISUs are added
1180 */
d9d1063d
JB		 1181 greg_feature = mpic_read(mpic->gregs, MPIC_INFO(GREG_FEATURE_0));
1182 mpic->num_cpus = ((greg_feature & MPIC_GREG_FEATURE_LAST_CPU_MASK)
14cf11af 1183 >> MPIC_GREG_FEATURE_LAST_CPU_SHIFT) + 1;
5073e7ee 1184 if (isu_size == 0) {
475ca391
KG		 1185 if (flags & MPIC_BROKEN_FRR_NIRQS)
1186 mpic->num_sources = mpic->irq_count;
1187 else
1188 mpic->num_sources =
1189 ((greg_feature & MPIC_GREG_FEATURE_LAST_SRC_MASK)
1190 >> MPIC_GREG_FEATURE_LAST_SRC_SHIFT) + 1;
5073e7ee 1191 }
14cf11af
PM		 1192
1193 /* Map the per-CPU registers */
1194 for (i = 0; i < mpic->num_cpus; i++) {
a959ff56 1195 mpic_map(mpic, paddr, &mpic->cpuregs[i],
fbf0274e
BH		 1196 MPIC_INFO(CPU_BASE) + i * MPIC_INFO(CPU_STRIDE),
1197 0x1000);
14cf11af
PM		 1198 }
1199
1200 /* Initialize main ISU if none provided */
1201 if (mpic->isu_size == 0) {
1202 mpic->isu_size = mpic->num_sources;
a959ff56 1203 mpic_map(mpic, paddr, &mpic->isus[0],
fbf0274e 1204 MPIC_INFO(IRQ_BASE), MPIC_INFO(IRQ_STRIDE) * mpic->isu_size);
14cf11af
PM		 1205 }
1206 mpic->isu_shift = 1 + __ilog2(mpic->isu_size - 1);
1207 mpic->isu_mask = (1 << mpic->isu_shift) - 1;
1208
31207dab
KG		 1209 mpic->irqhost = irq_alloc_host(node, IRQ_HOST_MAP_LINEAR,
1210 isu_size ? isu_size : mpic->num_sources,
1211 &mpic_host_ops,
1212 flags & MPIC_LARGE_VECTORS ? 2048 : 256);
1213 if (mpic->irqhost == NULL)
1214 return NULL;
1215
1216 mpic->irqhost->host_data = mpic;
1217
14cf11af 1218 /* Display version */
d9d1063d 1219 switch (greg_feature & MPIC_GREG_FEATURE_VERSION_MASK) {
14cf11af
PM		 1220 case 1:
1221 vers = "1.0";
1222 break;
1223 case 2:
1224 vers = "1.2";
1225 break;
1226 case 3:
1227 vers = "1.3";
1228 break;
1229 default:
1230 vers = "<unknown>";
1231 break;
1232 }
a959ff56
BH		 1233 printk(KERN_INFO "mpic: Setting up MPIC \"%s\" version %s at %llx,"
1234 " max %d CPUs\n",
1235 name, vers, (unsigned long long)paddr, mpic->num_cpus);
1236 printk(KERN_INFO "mpic: ISU size: %d, shift: %d, mask: %x\n",
1237 mpic->isu_size, mpic->isu_shift, mpic->isu_mask);
14cf11af
PM		 1238
1239 mpic->next = mpics;
1240 mpics = mpic;
1241
0ebfff14 1242 if (flags & MPIC_PRIMARY) {
14cf11af 1243 mpic_primary = mpic;
0ebfff14
BH		 1244 irq_set_default_host(mpic->irqhost);
1245 }
14cf11af
PM		 1246
1247 return mpic;
1248}
1249
1250void __init mpic_assign_isu(struct mpic *mpic, unsigned int isu_num,
a959ff56 1251 phys_addr_t paddr)
14cf11af
PM		 1252{
1253 unsigned int isu_first = isu_num * mpic->isu_size;
1254
1255 BUG_ON(isu_num >= MPIC_MAX_ISU);
1256
a959ff56 1257 mpic_map(mpic, paddr, &mpic->isus[isu_num], 0,
fbf0274e 1258 MPIC_INFO(IRQ_STRIDE) * mpic->isu_size);
14cf11af
PM		 1259 if ((isu_first + mpic->isu_size) > mpic->num_sources)
1260 mpic->num_sources = isu_first + mpic->isu_size;
1261}
1262
0ebfff14
BH		 1263void __init mpic_set_default_senses(struct mpic *mpic, u8 *senses, int count)
1264{
1265 mpic->senses = senses;
1266 mpic->senses_count = count;
1267}
1268
14cf11af
PM		 1269void __init mpic_init(struct mpic *mpic)
1270{
1271 int i;
cc353c30 1272 int cpu;
14cf11af
PM		 1273
1274 BUG_ON(mpic->num_sources == 0);
1275
1276 printk(KERN_INFO "mpic: Initializing for %d sources\n", mpic->num_sources);
1277
1278 /* Set current processor priority to max */
7233593b 1279 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0xf);
14cf11af
PM		 1280
1281 /* Initialize timers: just disable them all */
1282 for (i = 0; i < 4; i++) {
1283 mpic_write(mpic->tmregs,
7233593b
ZR		 1284 i * MPIC_INFO(TIMER_STRIDE) +
1285 MPIC_INFO(TIMER_DESTINATION), 0);
14cf11af 1286 mpic_write(mpic->tmregs,
7233593b
ZR		 1287 i * MPIC_INFO(TIMER_STRIDE) +
1288 MPIC_INFO(TIMER_VECTOR_PRI),
14cf11af 1289 MPIC_VECPRI_MASK |
7df2457d 1290 (mpic->timer_vecs[0] + i));
14cf11af
PM		 1291 }
1292
1293 /* Initialize IPIs to our reserved vectors and mark them disabled for now */
1294 mpic_test_broken_ipi(mpic);
1295 for (i = 0; i < 4; i++) {
1296 mpic_ipi_write(i,
1297 MPIC_VECPRI_MASK |
1298 (10 << MPIC_VECPRI_PRIORITY_SHIFT) |
7df2457d 1299 (mpic->ipi_vecs[0] + i));
14cf11af
PM		 1300 }
1301
1302 /* Initialize interrupt sources */
1303 if (mpic->irq_count == 0)
1304 mpic->irq_count = mpic->num_sources;
1305
1beb6a7d 1306 /* Do the HT PIC fixups on U3 broken mpic */
14cf11af 1307 DBG("MPIC flags: %x\n", mpic->flags);
05af7bd2 1308 if ((mpic->flags & MPIC_U3_HT_IRQS) && (mpic->flags & MPIC_PRIMARY)) {
3669e930 1309 mpic_scan_ht_pics(mpic);
05af7bd2
ME		 1310 mpic_u3msi_init(mpic);
1311 }
14cf11af 1312
38958dd9
OJ		 1313 mpic_pasemi_msi_init(mpic);
1314
cc353c30
AB		 1315 if (mpic->flags & MPIC_PRIMARY)
1316 cpu = hard_smp_processor_id();
1317 else
1318 cpu = 0;
1319
14cf11af
PM		 1320 for (i = 0; i < mpic->num_sources; i++) {
1321 /* start with vector = source number, and masked */
6e99e458
BH		 1322 u32 vecpri = MPIC_VECPRI_MASK | i |
1323 (8 << MPIC_VECPRI_PRIORITY_SHIFT);
14cf11af 1324
7fd72186
BH		 1325 /* check if protected */
1326 if (mpic->protected && test_bit(i, mpic->protected))
1327 continue;
14cf11af 1328 /* init hw */
7233593b 1329 mpic_irq_write(i, MPIC_INFO(IRQ_VECTOR_PRI), vecpri);
cc353c30 1330 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION), 1 << cpu);
14cf11af
PM		 1331 }
1332
7df2457d
OJ		 1333 /* Init spurious vector */
1334 mpic_write(mpic->gregs, MPIC_INFO(GREG_SPURIOUS), mpic->spurious_vec);
14cf11af 1335
7233593b
ZR		 1336 /* Disable 8259 passthrough, if supported */
1337 if (!(mpic->flags & MPIC_NO_PTHROU_DIS))
1338 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1339 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
1340 | MPIC_GREG_GCONF_8259_PTHROU_DIS);
14cf11af 1341
d87bf3be
OJ		 1342 if (mpic->flags & MPIC_NO_BIAS)
1343 mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
1344 mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))
1345 | MPIC_GREG_GCONF_NO_BIAS);
1346
14cf11af 1347 /* Set current processor priority to 0 */
7233593b 1348 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0);
3669e930
JB		 1349
1350#ifdef CONFIG_PM
1351 /* allocate memory to save mpic state */
1352 mpic->save_data = alloc_bootmem(mpic->num_sources * sizeof(struct mpic_irq_save));
1353 BUG_ON(mpic->save_data == NULL);
1354#endif
14cf11af
PM		 1355}
1356
868ea0c9
MG		 1357void __init mpic_set_clk_ratio(struct mpic *mpic, u32 clock_ratio)
1358{
1359 u32 v;
1360
1361 v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
1362 v &= ~MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO_MASK;
1363 v |= MPIC_GREG_GLOBAL_CONF_1_CLK_RATIO(clock_ratio);
1364 mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
1365}
14cf11af 1366
868ea0c9
MG		 1367void __init mpic_set_serial_int(struct mpic *mpic, int enable)
1368{
ba1826e5 1369 unsigned long flags;
868ea0c9
MG		 1370 u32 v;
1371
ba1826e5 1372 spin_lock_irqsave(&mpic_lock, flags);
868ea0c9
MG		 1373 v = mpic_read(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1);
1374 if (enable)
1375 v |= MPIC_GREG_GLOBAL_CONF_1_SIE;
1376 else
1377 v &= ~MPIC_GREG_GLOBAL_CONF_1_SIE;
1378 mpic_write(mpic->gregs, MPIC_GREG_GLOBAL_CONF_1, v);
ba1826e5 1379 spin_unlock_irqrestore(&mpic_lock, flags);
868ea0c9 1380}
14cf11af
PM		 1381
1382void mpic_irq_set_priority(unsigned int irq, unsigned int pri)
1383{
d9d1063d 1384 unsigned int is_ipi;
14cf11af 1385 struct mpic *mpic = mpic_find(irq, &is_ipi);
0ebfff14 1386 unsigned int src = mpic_irq_to_hw(irq);
14cf11af
PM		 1387 unsigned long flags;
1388 u32 reg;
1389
06a901c5
SR		 1390 if (!mpic)
1391 return;
1392
14cf11af
PM		 1393 spin_lock_irqsave(&mpic_lock, flags);
1394 if (is_ipi) {
7df2457d 1395 reg = mpic_ipi_read(src - mpic->ipi_vecs[0]) &
e5356640 1396 ~MPIC_VECPRI_PRIORITY_MASK;
7df2457d 1397 mpic_ipi_write(src - mpic->ipi_vecs[0],
14cf11af
PM		 1398 reg | (pri << MPIC_VECPRI_PRIORITY_SHIFT));
1399 } else {
7233593b 1400 reg = mpic_irq_read(src, MPIC_INFO(IRQ_VECTOR_PRI))
e5356640 1401 & ~MPIC_VECPRI_PRIORITY_MASK;
7233593b 1402 mpic_irq_write(src, MPIC_INFO(IRQ_VECTOR_PRI),
14cf11af
PM		 1403 reg | (pri << MPIC_VECPRI_PRIORITY_SHIFT));
1404 }
1405 spin_unlock_irqrestore(&mpic_lock, flags);
1406}
1407
14cf11af
PM		 1408void mpic_setup_this_cpu(void)
1409{
1410#ifdef CONFIG_SMP
1411 struct mpic *mpic = mpic_primary;
1412 unsigned long flags;
1413 u32 msk = 1 << hard_smp_processor_id();
1414 unsigned int i;
1415
1416 BUG_ON(mpic == NULL);
1417
1418 DBG("%s: setup_this_cpu(%d)\n", mpic->name, hard_smp_processor_id());
1419
1420 spin_lock_irqsave(&mpic_lock, flags);
1421
1422 /* let the mpic know we want intrs. default affinity is 0xffffffff
1423 * until changed via /proc. That's how it's done on x86. If we want
1424 * it differently, then we should make sure we also change the default
a53da52f 1425 * values of irq_desc[].affinity in irq.c.
14cf11af
PM		 1426 */
1427 if (distribute_irqs) {
1428 for (i = 0; i < mpic->num_sources ; i++)
7233593b
ZR		 1429 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
1430 mpic_irq_read(i, MPIC_INFO(IRQ_DESTINATION)) | msk);
14cf11af
PM		 1431 }
1432
1433 /* Set current processor priority to 0 */
7233593b 1434 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0);
14cf11af
PM		 1435
1436 spin_unlock_irqrestore(&mpic_lock, flags);
1437#endif /* CONFIG_SMP */
1438}
1439
1440int mpic_cpu_get_priority(void)
1441{
1442 struct mpic *mpic = mpic_primary;
1443
7233593b 1444 return mpic_cpu_read(MPIC_INFO(CPU_CURRENT_TASK_PRI));
14cf11af
PM		 1445}
1446
1447void mpic_cpu_set_priority(int prio)
1448{
1449 struct mpic *mpic = mpic_primary;
1450
1451 prio &= MPIC_CPU_TASKPRI_MASK;
7233593b 1452 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), prio);
14cf11af
PM		 1453}
1454
14cf11af
PM		 1455void mpic_teardown_this_cpu(int secondary)
1456{
1457 struct mpic *mpic = mpic_primary;
1458 unsigned long flags;
1459 u32 msk = 1 << hard_smp_processor_id();
1460 unsigned int i;
1461
1462 BUG_ON(mpic == NULL);
1463
1464 DBG("%s: teardown_this_cpu(%d)\n", mpic->name, hard_smp_processor_id());
1465 spin_lock_irqsave(&mpic_lock, flags);
1466
1467 /* let the mpic know we don't want intrs. */
1468 for (i = 0; i < mpic->num_sources ; i++)
7233593b
ZR		 1469 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
1470 mpic_irq_read(i, MPIC_INFO(IRQ_DESTINATION)) & ~msk);
14cf11af
PM		 1471
1472 /* Set current processor priority to max */
7233593b 1473 mpic_cpu_write(MPIC_INFO(CPU_CURRENT_TASK_PRI), 0xf);
7132799b
VB		 1474 /* We need to EOI the IPI since not all platforms reset the MPIC
1475 * on boot and new interrupts wouldn't get delivered otherwise.
1476 */
1477 mpic_eoi(mpic);
14cf11af
PM		 1478
1479 spin_unlock_irqrestore(&mpic_lock, flags);
1480}
1481
1482
1483void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask)
1484{
1485 struct mpic *mpic = mpic_primary;
1486
1487 BUG_ON(mpic == NULL);
1488
1beb6a7d 1489#ifdef DEBUG_IPI
14cf11af 1490 DBG("%s: send_ipi(ipi_no: %d)\n", mpic->name, ipi_no);
1beb6a7d 1491#endif
14cf11af 1492
7233593b
ZR		 1493 mpic_cpu_write(MPIC_INFO(CPU_IPI_DISPATCH_0) +
1494 ipi_no * MPIC_INFO(CPU_IPI_DISPATCH_STRIDE),
14cf11af
PM		 1495 mpic_physmask(cpu_mask & cpus_addr(cpu_online_map)[0]));
1496}
1497
f365355e 1498static unsigned int _mpic_get_one_irq(struct mpic *mpic, int reg)
14cf11af 1499{
0ebfff14 1500 u32 src;
14cf11af 1501
f365355e 1502 src = mpic_cpu_read(reg) & MPIC_INFO(VECPRI_VECTOR_MASK);
1beb6a7d 1503#ifdef DEBUG_LOW
f365355e 1504 DBG("%s: get_one_irq(reg 0x%x): %d\n", mpic->name, reg, src);
1beb6a7d 1505#endif
5cddd2e3
JB		 1506 if (unlikely(src == mpic->spurious_vec)) {
1507 if (mpic->flags & MPIC_SPV_EOI)
1508 mpic_eoi(mpic);
0ebfff14 1509 return NO_IRQ;
5cddd2e3 1510 }
7fd72186
BH		 1511 if (unlikely(mpic->protected && test_bit(src, mpic->protected))) {
1512 if (printk_ratelimit())
1513 printk(KERN_WARNING "%s: Got protected source %d !\n",
1514 mpic->name, (int)src);
1515 mpic_eoi(mpic);
1516 return NO_IRQ;
1517 }
1518
0ebfff14 1519 return irq_linear_revmap(mpic->irqhost, src);
14cf11af
PM		 1520}
1521
f365355e
OJ		 1522unsigned int mpic_get_one_irq(struct mpic *mpic)
1523{
1524 return _mpic_get_one_irq(mpic, MPIC_INFO(CPU_INTACK));
1525}
1526
35a84c2f 1527unsigned int mpic_get_irq(void)
14cf11af
PM		 1528{
1529 struct mpic *mpic = mpic_primary;
1530
1531 BUG_ON(mpic == NULL);
1532
35a84c2f 1533 return mpic_get_one_irq(mpic);
14cf11af
PM		 1534}
1535
d91e4ea7
KG		 1536unsigned int mpic_get_coreint_irq(void)
1537{
1538#ifdef CONFIG_BOOKE
1539 struct mpic *mpic = mpic_primary;
1540 u32 src;
1541
1542 BUG_ON(mpic == NULL);
1543
1544 src = mfspr(SPRN_EPR);
1545
1546 if (unlikely(src == mpic->spurious_vec)) {
1547 if (mpic->flags & MPIC_SPV_EOI)
1548 mpic_eoi(mpic);
1549 return NO_IRQ;
1550 }
1551 if (unlikely(mpic->protected && test_bit(src, mpic->protected))) {
1552 if (printk_ratelimit())
1553 printk(KERN_WARNING "%s: Got protected source %d !\n",
1554 mpic->name, (int)src);
1555 return NO_IRQ;
1556 }
1557
1558 return irq_linear_revmap(mpic->irqhost, src);
1559#else
1560 return NO_IRQ;
1561#endif
1562}
1563
f365355e
OJ		 1564unsigned int mpic_get_mcirq(void)
1565{
1566 struct mpic *mpic = mpic_primary;
1567
1568 BUG_ON(mpic == NULL);
1569
1570 return _mpic_get_one_irq(mpic, MPIC_INFO(CPU_MCACK));
1571}
14cf11af
PM		 1572
1573#ifdef CONFIG_SMP
1574void mpic_request_ipis(void)
1575{
1576 struct mpic *mpic = mpic_primary;
78608dd3 1577 int i;
14cf11af 1578 BUG_ON(mpic == NULL);
14cf11af 1579
0ebfff14
BH		 1580 printk(KERN_INFO "mpic: requesting IPIs ... \n");
1581
1582 for (i = 0; i < 4; i++) {
1583 unsigned int vipi = irq_create_mapping(mpic->irqhost,
7df2457d 1584 mpic->ipi_vecs[0] + i);
0ebfff14 1585 if (vipi == NO_IRQ) {
78608dd3
MM		 1586 printk(KERN_ERR "Failed to map %s\n", smp_ipi_name[i]);
1587 continue;
d16f1b64 1588 }
78608dd3 1589 smp_request_message_ipi(vipi, i);
0ebfff14 1590 }
14cf11af 1591}
a9c59264
PM		 1592
1593void smp_mpic_message_pass(int target, int msg)
1594{
1595 /* make sure we're sending something that translates to an IPI */
1596 if ((unsigned int)msg > 3) {
1597 printk("SMP %d: smp_message_pass: unknown msg %d\n",
1598 smp_processor_id(), msg);
1599 return;
1600 }
1601 switch (target) {
1602 case MSG_ALL:
1603 mpic_send_ipi(msg, 0xffffffff);
1604 break;
1605 case MSG_ALL_BUT_SELF:
1606 mpic_send_ipi(msg, 0xffffffff & ~(1 << smp_processor_id()));
1607 break;
1608 default:
1609 mpic_send_ipi(msg, 1 << target);
1610 break;
1611 }
1612}
775aeff4
ME		 1613
1614int __init smp_mpic_probe(void)
1615{
1616 int nr_cpus;
1617
1618 DBG("smp_mpic_probe()...\n");
1619
1620 nr_cpus = cpus_weight(cpu_possible_map);
1621
1622 DBG("nr_cpus: %d\n", nr_cpus);
1623
1624 if (nr_cpus > 1)
1625 mpic_request_ipis();
1626
1627 return nr_cpus;
1628}
1629
1630void __devinit smp_mpic_setup_cpu(int cpu)
1631{
1632 mpic_setup_this_cpu();
1633}
14cf11af 1634#endif /* CONFIG_SMP */
3669e930
JB		 1635
1636#ifdef CONFIG_PM
1637static int mpic_suspend(struct sys_device *dev, pm_message_t state)
1638{
1639 struct mpic *mpic = container_of(dev, struct mpic, sysdev);
1640 int i;
1641
1642 for (i = 0; i < mpic->num_sources; i++) {
1643 mpic->save_data[i].vecprio =
1644 mpic_irq_read(i, MPIC_INFO(IRQ_VECTOR_PRI));
1645 mpic->save_data[i].dest =
1646 mpic_irq_read(i, MPIC_INFO(IRQ_DESTINATION));
1647 }
1648
1649 return 0;
1650}
1651
1652static int mpic_resume(struct sys_device *dev)
1653{
1654 struct mpic *mpic = container_of(dev, struct mpic, sysdev);
1655 int i;
1656
1657 for (i = 0; i < mpic->num_sources; i++) {
1658 mpic_irq_write(i, MPIC_INFO(IRQ_VECTOR_PRI),
1659 mpic->save_data[i].vecprio);
1660 mpic_irq_write(i, MPIC_INFO(IRQ_DESTINATION),
1661 mpic->save_data[i].dest);
1662
1663#ifdef CONFIG_MPIC_U3_HT_IRQS
1664 {
1665 struct mpic_irq_fixup *fixup = &mpic->fixups[i];
1666
1667 if (fixup->base) {
1668 /* we use the lowest bit in an inverted meaning */
1669 if ((mpic->save_data[i].fixup_data & 1) == 0)
1670 continue;
1671
1672 /* Enable and configure */
1673 writeb(0x10 + 2 * fixup->index, fixup->base + 2);
1674
1675 writel(mpic->save_data[i].fixup_data & ~1,
1676 fixup->base + 4);
1677 }
1678 }
1679#endif
1680 } /* end for loop */
1681
1682 return 0;
1683}
1684#endif
1685
1686static struct sysdev_class mpic_sysclass = {
1687#ifdef CONFIG_PM
1688 .resume = mpic_resume,
1689 .suspend = mpic_suspend,
1690#endif
af5ca3f4 1691 .name = "mpic",
3669e930
JB		 1692};
1693
1694static int mpic_init_sys(void)
1695{
1696 struct mpic *mpic = mpics;
1697 int error, id = 0;
1698
1699 error = sysdev_class_register(&mpic_sysclass);
1700
1701 while (mpic && !error) {
1702 mpic->sysdev.cls = &mpic_sysclass;
1703 mpic->sysdev.id = id++;
1704 error = sysdev_register(&mpic->sysdev);
1705 mpic = mpic->next;
1706 }
1707 return error;
1708}
1709
1710device_initcall(mpic_init_sys);
Linux 6.x block layer and io_uring tree(s)