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authorPaul Mackerras <paulus@samba.org>2008-06-09 00:01:46 -0400
committerPaul Mackerras <paulus@samba.org>2008-06-10 07:40:22 -0400
commit917f0af9e5a9ceecf9e72537fabb501254ba321d (patch)
tree1ef207755c6d83ce4af93ef2b5e4645eebd65886 /arch/ppc/syslib/open_pic2.c
parent0f3d6bcd391b058c619fc30e8022e8a29fbf4bef (diff)
powerpc: Remove arch/ppc and include/asm-ppc
All the maintained platforms are now in arch/powerpc, so the old arch/ppc stuff can now go away. Acked-by: Adrian Bunk <bunk@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Becky Bruce <becky.bruce@freescale.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Jochen Friedrich <jochen@scram.de> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: Jon Loeliger <jdl@freescale.com> Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com> Acked-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: Scott Wood <scottwood@freescale.com> Acked-by: Sean MacLennan <smaclennan@pikatech.com> Acked-by: Segher Boessenkool <segher@kernel.crashing.org> Acked-by: Stefan Roese <sr@denx.de> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc/syslib/open_pic2.c')
-rw-r--r--arch/ppc/syslib/open_pic2.c710
1 files changed, 0 insertions, 710 deletions
diff --git a/arch/ppc/syslib/open_pic2.c b/arch/ppc/syslib/open_pic2.c
deleted file mode 100644
index 449075a04798..000000000000
--- a/arch/ppc/syslib/open_pic2.c
+++ /dev/null
@@ -1,710 +0,0 @@
1/*
2 * Copyright (C) 1997 Geert Uytterhoeven
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file COPYING in the main directory of this archive
6 * for more details.
7 *
8 * This is a duplicate of open_pic.c that deals with U3s MPIC on
9 * G5 PowerMacs. It's the same file except it's using big endian
10 * register accesses
11 */
12
13#include <linux/types.h>
14#include <linux/kernel.h>
15#include <linux/sched.h>
16#include <linux/init.h>
17#include <linux/interrupt.h>
18#include <linux/sysdev.h>
19#include <linux/errno.h>
20#include <asm/ptrace.h>
21#include <asm/signal.h>
22#include <asm/io.h>
23#include <asm/irq.h>
24#include <asm/sections.h>
25#include <asm/open_pic.h>
26#include <asm/i8259.h>
27#include <asm/machdep.h>
28
29#include "open_pic_defs.h"
30
31void *OpenPIC2_Addr;
32static volatile struct OpenPIC *OpenPIC2 = NULL;
33/*
34 * We define OpenPIC_InitSenses table thusly:
35 * bit 0x1: sense, 0 for edge and 1 for level.
36 * bit 0x2: polarity, 0 for negative, 1 for positive.
37 */
38extern u_int OpenPIC_NumInitSenses;
39extern u_char *OpenPIC_InitSenses;
40extern int use_of_interrupt_tree;
41
42static u_int NumProcessors;
43static u_int NumSources;
44static int open_pic2_irq_offset;
45static volatile OpenPIC_Source *ISR[NR_IRQS];
46
47/* Global Operations */
48static void openpic2_disable_8259_pass_through(void);
49static void openpic2_set_priority(u_int pri);
50static void openpic2_set_spurious(u_int vector);
51
52/* Timer Interrupts */
53static void openpic2_inittimer(u_int timer, u_int pri, u_int vector);
54static void openpic2_maptimer(u_int timer, u_int cpumask);
55
56/* Interrupt Sources */
57static void openpic2_enable_irq(u_int irq);
58static void openpic2_disable_irq(u_int irq);
59static void openpic2_initirq(u_int irq, u_int pri, u_int vector, int polarity,
60 int is_level);
61static void openpic2_mapirq(u_int irq, u_int cpumask, u_int keepmask);
62
63/*
64 * These functions are not used but the code is kept here
65 * for completeness and future reference.
66 */
67static void openpic2_reset(void);
68#ifdef notused
69static void openpic2_enable_8259_pass_through(void);
70static u_int openpic2_get_priority(void);
71static u_int openpic2_get_spurious(void);
72static void openpic2_set_sense(u_int irq, int sense);
73#endif /* notused */
74
75/*
76 * Description of the openpic for the higher-level irq code
77 */
78static void openpic2_end_irq(unsigned int irq_nr);
79static void openpic2_ack_irq(unsigned int irq_nr);
80
81struct hw_interrupt_type open_pic2 = {
82 .typename = " OpenPIC2 ",
83 .enable = openpic2_enable_irq,
84 .disable = openpic2_disable_irq,
85 .ack = openpic2_ack_irq,
86 .end = openpic2_end_irq,
87};
88
89/*
90 * Accesses to the current processor's openpic registers
91 * On cascaded controller, this is only CPU 0
92 */
93#define THIS_CPU Processor[0]
94#define DECL_THIS_CPU
95#define CHECK_THIS_CPU
96
97#if 1
98#define check_arg_ipi(ipi) \
99 if (ipi < 0 || ipi >= OPENPIC_NUM_IPI) \
100 printk("open_pic.c:%d: illegal ipi %d\n", __LINE__, ipi);
101#define check_arg_timer(timer) \
102 if (timer < 0 || timer >= OPENPIC_NUM_TIMERS) \
103 printk("open_pic.c:%d: illegal timer %d\n", __LINE__, timer);
104#define check_arg_vec(vec) \
105 if (vec < 0 || vec >= OPENPIC_NUM_VECTORS) \
106 printk("open_pic.c:%d: illegal vector %d\n", __LINE__, vec);
107#define check_arg_pri(pri) \
108 if (pri < 0 || pri >= OPENPIC_NUM_PRI) \
109 printk("open_pic.c:%d: illegal priority %d\n", __LINE__, pri);
110/*
111 * Print out a backtrace if it's out of range, since if it's larger than NR_IRQ's
112 * data has probably been corrupted and we're going to panic or deadlock later
113 * anyway --Troy
114 */
115extern unsigned long* _get_SP(void);
116#define check_arg_irq(irq) \
117 if (irq < open_pic2_irq_offset || irq >= NumSources+open_pic2_irq_offset \
118 || ISR[irq - open_pic2_irq_offset] == 0) { \
119 printk("open_pic.c:%d: illegal irq %d\n", __LINE__, irq); \
120 /*print_backtrace(_get_SP());*/ }
121#define check_arg_cpu(cpu) \
122 if (cpu < 0 || cpu >= NumProcessors){ \
123 printk("open_pic2.c:%d: illegal cpu %d\n", __LINE__, cpu); \
124 /*print_backtrace(_get_SP());*/ }
125#else
126#define check_arg_ipi(ipi) do {} while (0)
127#define check_arg_timer(timer) do {} while (0)
128#define check_arg_vec(vec) do {} while (0)
129#define check_arg_pri(pri) do {} while (0)
130#define check_arg_irq(irq) do {} while (0)
131#define check_arg_cpu(cpu) do {} while (0)
132#endif
133
134static u_int openpic2_read(volatile u_int *addr)
135{
136 u_int val;
137
138 val = in_be32(addr);
139 return val;
140}
141
142static inline void openpic2_write(volatile u_int *addr, u_int val)
143{
144 out_be32(addr, val);
145}
146
147static inline u_int openpic2_readfield(volatile u_int *addr, u_int mask)
148{
149 u_int val = openpic2_read(addr);
150 return val & mask;
151}
152
153inline void openpic2_writefield(volatile u_int *addr, u_int mask,
154 u_int field)
155{
156 u_int val = openpic2_read(addr);
157 openpic2_write(addr, (val & ~mask) | (field & mask));
158}
159
160static inline void openpic2_clearfield(volatile u_int *addr, u_int mask)
161{
162 openpic2_writefield(addr, mask, 0);
163}
164
165static inline void openpic2_setfield(volatile u_int *addr, u_int mask)
166{
167 openpic2_writefield(addr, mask, mask);
168}
169
170static void openpic2_safe_writefield(volatile u_int *addr, u_int mask,
171 u_int field)
172{
173 openpic2_setfield(addr, OPENPIC_MASK);
174 while (openpic2_read(addr) & OPENPIC_ACTIVITY);
175 openpic2_writefield(addr, mask | OPENPIC_MASK, field | OPENPIC_MASK);
176}
177
178static void openpic2_reset(void)
179{
180 openpic2_setfield(&OpenPIC2->Global.Global_Configuration0,
181 OPENPIC_CONFIG_RESET);
182 while (openpic2_readfield(&OpenPIC2->Global.Global_Configuration0,
183 OPENPIC_CONFIG_RESET))
184 mb();
185}
186
187void __init openpic2_set_sources(int first_irq, int num_irqs, void *first_ISR)
188{
189 volatile OpenPIC_Source *src = first_ISR;
190 int i, last_irq;
191
192 last_irq = first_irq + num_irqs;
193 if (last_irq > NumSources)
194 NumSources = last_irq;
195 if (src == 0)
196 src = &((struct OpenPIC *)OpenPIC2_Addr)->Source[first_irq];
197 for (i = first_irq; i < last_irq; ++i, ++src)
198 ISR[i] = src;
199}
200
201/*
202 * The `offset' parameter defines where the interrupts handled by the
203 * OpenPIC start in the space of interrupt numbers that the kernel knows
204 * about. In other words, the OpenPIC's IRQ0 is numbered `offset' in the
205 * kernel's interrupt numbering scheme.
206 * We assume there is only one OpenPIC.
207 */
208void __init openpic2_init(int offset)
209{
210 u_int t, i;
211 u_int timerfreq;
212 const char *version;
213
214 if (!OpenPIC2_Addr) {
215 printk("No OpenPIC2 found !\n");
216 return;
217 }
218 OpenPIC2 = (volatile struct OpenPIC *)OpenPIC2_Addr;
219
220 if (ppc_md.progress) ppc_md.progress("openpic: enter", 0x122);
221
222 t = openpic2_read(&OpenPIC2->Global.Feature_Reporting0);
223 switch (t & OPENPIC_FEATURE_VERSION_MASK) {
224 case 1:
225 version = "1.0";
226 break;
227 case 2:
228 version = "1.2";
229 break;
230 case 3:
231 version = "1.3";
232 break;
233 default:
234 version = "?";
235 break;
236 }
237 NumProcessors = ((t & OPENPIC_FEATURE_LAST_PROCESSOR_MASK) >>
238 OPENPIC_FEATURE_LAST_PROCESSOR_SHIFT) + 1;
239 if (NumSources == 0)
240 openpic2_set_sources(0,
241 ((t & OPENPIC_FEATURE_LAST_SOURCE_MASK) >>
242 OPENPIC_FEATURE_LAST_SOURCE_SHIFT) + 1,
243 NULL);
244 printk("OpenPIC (2) Version %s (%d CPUs and %d IRQ sources) at %p\n",
245 version, NumProcessors, NumSources, OpenPIC2);
246 timerfreq = openpic2_read(&OpenPIC2->Global.Timer_Frequency);
247 if (timerfreq)
248 printk("OpenPIC timer frequency is %d.%06d MHz\n",
249 timerfreq / 1000000, timerfreq % 1000000);
250
251 open_pic2_irq_offset = offset;
252
253 /* Initialize timer interrupts */
254 if ( ppc_md.progress ) ppc_md.progress("openpic2: timer",0x3ba);
255 for (i = 0; i < OPENPIC_NUM_TIMERS; i++) {
256 /* Disabled, Priority 0 */
257 openpic2_inittimer(i, 0, OPENPIC2_VEC_TIMER+i+offset);
258 /* No processor */
259 openpic2_maptimer(i, 0);
260 }
261
262 /* Initialize external interrupts */
263 if (ppc_md.progress) ppc_md.progress("openpic2: external",0x3bc);
264
265 openpic2_set_priority(0xf);
266
267 /* Init all external sources, including possibly the cascade. */
268 for (i = 0; i < NumSources; i++) {
269 int sense;
270
271 if (ISR[i] == 0)
272 continue;
273
274 /* the bootloader may have left it enabled (bad !) */
275 openpic2_disable_irq(i+offset);
276
277 sense = (i < OpenPIC_NumInitSenses)? OpenPIC_InitSenses[i]: \
278 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE);
279
280 if (sense & IRQ_SENSE_MASK)
281 irq_desc[i+offset].status = IRQ_LEVEL;
282
283 /* Enabled, Priority 8 */
284 openpic2_initirq(i, 8, i+offset, (sense & IRQ_POLARITY_MASK),
285 (sense & IRQ_SENSE_MASK));
286 /* Processor 0 */
287 openpic2_mapirq(i, 1<<0, 0);
288 }
289
290 /* Init descriptors */
291 for (i = offset; i < NumSources + offset; i++)
292 irq_desc[i].chip = &open_pic2;
293
294 /* Initialize the spurious interrupt */
295 if (ppc_md.progress) ppc_md.progress("openpic2: spurious",0x3bd);
296 openpic2_set_spurious(OPENPIC2_VEC_SPURIOUS+offset);
297
298 openpic2_disable_8259_pass_through();
299 openpic2_set_priority(0);
300
301 if (ppc_md.progress) ppc_md.progress("openpic2: exit",0x222);
302}
303
304#ifdef notused
305static void openpic2_enable_8259_pass_through(void)
306{
307 openpic2_clearfield(&OpenPIC2->Global.Global_Configuration0,
308 OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE);
309}
310#endif /* notused */
311
312/* This can't be __init, it is used in openpic_sleep_restore_intrs */
313static void openpic2_disable_8259_pass_through(void)
314{
315 openpic2_setfield(&OpenPIC2->Global.Global_Configuration0,
316 OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE);
317}
318
319/*
320 * Find out the current interrupt
321 */
322u_int openpic2_irq(void)
323{
324 u_int vec;
325 DECL_THIS_CPU;
326
327 CHECK_THIS_CPU;
328 vec = openpic2_readfield(&OpenPIC2->THIS_CPU.Interrupt_Acknowledge,
329 OPENPIC_VECTOR_MASK);
330 return vec;
331}
332
333void openpic2_eoi(void)
334{
335 DECL_THIS_CPU;
336
337 CHECK_THIS_CPU;
338 openpic2_write(&OpenPIC2->THIS_CPU.EOI, 0);
339 /* Handle PCI write posting */
340 (void)openpic2_read(&OpenPIC2->THIS_CPU.EOI);
341}
342
343#ifdef notused
344static u_int openpic2_get_priority(void)
345{
346 DECL_THIS_CPU;
347
348 CHECK_THIS_CPU;
349 return openpic2_readfield(&OpenPIC2->THIS_CPU.Current_Task_Priority,
350 OPENPIC_CURRENT_TASK_PRIORITY_MASK);
351}
352#endif /* notused */
353
354static void __init openpic2_set_priority(u_int pri)
355{
356 DECL_THIS_CPU;
357
358 CHECK_THIS_CPU;
359 check_arg_pri(pri);
360 openpic2_writefield(&OpenPIC2->THIS_CPU.Current_Task_Priority,
361 OPENPIC_CURRENT_TASK_PRIORITY_MASK, pri);
362}
363
364/*
365 * Get/set the spurious vector
366 */
367#ifdef notused
368static u_int openpic2_get_spurious(void)
369{
370 return openpic2_readfield(&OpenPIC2->Global.Spurious_Vector,
371 OPENPIC_VECTOR_MASK);
372}
373#endif /* notused */
374
375/* This can't be __init, it is used in openpic_sleep_restore_intrs */
376static void openpic2_set_spurious(u_int vec)
377{
378 check_arg_vec(vec);
379 openpic2_writefield(&OpenPIC2->Global.Spurious_Vector, OPENPIC_VECTOR_MASK,
380 vec);
381}
382
383static DEFINE_SPINLOCK(openpic2_setup_lock);
384
385/*
386 * Initialize a timer interrupt (and disable it)
387 *
388 * timer: OpenPIC timer number
389 * pri: interrupt source priority
390 * vec: the vector it will produce
391 */
392static void __init openpic2_inittimer(u_int timer, u_int pri, u_int vec)
393{
394 check_arg_timer(timer);
395 check_arg_pri(pri);
396 check_arg_vec(vec);
397 openpic2_safe_writefield(&OpenPIC2->Global.Timer[timer].Vector_Priority,
398 OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK,
399 (pri << OPENPIC_PRIORITY_SHIFT) | vec);
400}
401
402/*
403 * Map a timer interrupt to one or more CPUs
404 */
405static void __init openpic2_maptimer(u_int timer, u_int cpumask)
406{
407 check_arg_timer(timer);
408 openpic2_write(&OpenPIC2->Global.Timer[timer].Destination,
409 cpumask);
410}
411
412/*
413 * Initalize the interrupt source which will generate an NMI.
414 * This raises the interrupt's priority from 8 to 9.
415 *
416 * irq: The logical IRQ which generates an NMI.
417 */
418void __init
419openpic2_init_nmi_irq(u_int irq)
420{
421 check_arg_irq(irq);
422 openpic2_safe_writefield(&ISR[irq - open_pic2_irq_offset]->Vector_Priority,
423 OPENPIC_PRIORITY_MASK,
424 9 << OPENPIC_PRIORITY_SHIFT);
425}
426
427/*
428 *
429 * All functions below take an offset'ed irq argument
430 *
431 */
432
433
434/*
435 * Enable/disable an external interrupt source
436 *
437 * Externally called, irq is an offseted system-wide interrupt number
438 */
439static void openpic2_enable_irq(u_int irq)
440{
441 volatile u_int *vpp;
442
443 check_arg_irq(irq);
444 vpp = &ISR[irq - open_pic2_irq_offset]->Vector_Priority;
445 openpic2_clearfield(vpp, OPENPIC_MASK);
446 /* make sure mask gets to controller before we return to user */
447 do {
448 mb(); /* sync is probably useless here */
449 } while (openpic2_readfield(vpp, OPENPIC_MASK));
450}
451
452static void openpic2_disable_irq(u_int irq)
453{
454 volatile u_int *vpp;
455 u32 vp;
456
457 check_arg_irq(irq);
458 vpp = &ISR[irq - open_pic2_irq_offset]->Vector_Priority;
459 openpic2_setfield(vpp, OPENPIC_MASK);
460 /* make sure mask gets to controller before we return to user */
461 do {
462 mb(); /* sync is probably useless here */
463 vp = openpic2_readfield(vpp, OPENPIC_MASK | OPENPIC_ACTIVITY);
464 } while((vp & OPENPIC_ACTIVITY) && !(vp & OPENPIC_MASK));
465}
466
467
468/*
469 * Initialize an interrupt source (and disable it!)
470 *
471 * irq: OpenPIC interrupt number
472 * pri: interrupt source priority
473 * vec: the vector it will produce
474 * pol: polarity (1 for positive, 0 for negative)
475 * sense: 1 for level, 0 for edge
476 */
477static void __init
478openpic2_initirq(u_int irq, u_int pri, u_int vec, int pol, int sense)
479{
480 openpic2_safe_writefield(&ISR[irq]->Vector_Priority,
481 OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK |
482 OPENPIC_SENSE_MASK | OPENPIC_POLARITY_MASK,
483 (pri << OPENPIC_PRIORITY_SHIFT) | vec |
484 (pol ? OPENPIC_POLARITY_POSITIVE :
485 OPENPIC_POLARITY_NEGATIVE) |
486 (sense ? OPENPIC_SENSE_LEVEL : OPENPIC_SENSE_EDGE));
487}
488
489/*
490 * Map an interrupt source to one or more CPUs
491 */
492static void openpic2_mapirq(u_int irq, u_int physmask, u_int keepmask)
493{
494 if (ISR[irq] == 0)
495 return;
496 if (keepmask != 0)
497 physmask |= openpic2_read(&ISR[irq]->Destination) & keepmask;
498 openpic2_write(&ISR[irq]->Destination, physmask);
499}
500
501#ifdef notused
502/*
503 * Set the sense for an interrupt source (and disable it!)
504 *
505 * sense: 1 for level, 0 for edge
506 */
507static void openpic2_set_sense(u_int irq, int sense)
508{
509 if (ISR[irq] != 0)
510 openpic2_safe_writefield(&ISR[irq]->Vector_Priority,
511 OPENPIC_SENSE_LEVEL,
512 (sense ? OPENPIC_SENSE_LEVEL : 0));
513}
514#endif /* notused */
515
516/* No spinlocks, should not be necessary with the OpenPIC
517 * (1 register = 1 interrupt and we have the desc lock).
518 */
519static void openpic2_ack_irq(unsigned int irq_nr)
520{
521 openpic2_disable_irq(irq_nr);
522 openpic2_eoi();
523}
524
525static void openpic2_end_irq(unsigned int irq_nr)
526{
527 if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
528 openpic2_enable_irq(irq_nr);
529}
530
531int
532openpic2_get_irq(void)
533{
534 int irq = openpic2_irq();
535
536 if (irq == (OPENPIC2_VEC_SPURIOUS + open_pic2_irq_offset))
537 irq = -1;
538 return irq;
539}
540
541#ifdef CONFIG_PM
542
543/*
544 * We implement the IRQ controller as a sysdev and put it
545 * to sleep at powerdown stage (the callback is named suspend,
546 * but it's old semantics, for the Device Model, it's really
547 * powerdown). The possible problem is that another sysdev that
548 * happens to be suspend after this one will have interrupts off,
549 * that may be an issue... For now, this isn't an issue on pmac
550 * though...
551 */
552
553static u32 save_ipi_vp[OPENPIC_NUM_IPI];
554static u32 save_irq_src_vp[OPENPIC_MAX_SOURCES];
555static u32 save_irq_src_dest[OPENPIC_MAX_SOURCES];
556static u32 save_cpu_task_pri[OPENPIC_MAX_PROCESSORS];
557static int openpic_suspend_count;
558
559static void openpic2_cached_enable_irq(u_int irq)
560{
561 check_arg_irq(irq);
562 save_irq_src_vp[irq - open_pic2_irq_offset] &= ~OPENPIC_MASK;
563}
564
565static void openpic2_cached_disable_irq(u_int irq)
566{
567 check_arg_irq(irq);
568 save_irq_src_vp[irq - open_pic2_irq_offset] |= OPENPIC_MASK;
569}
570
571/* WARNING: Can be called directly by the cpufreq code with NULL parameter,
572 * we need something better to deal with that... Maybe switch to S1 for
573 * cpufreq changes
574 */
575int openpic2_suspend(struct sys_device *sysdev, pm_message_t state)
576{
577 int i;
578 unsigned long flags;
579
580 spin_lock_irqsave(&openpic2_setup_lock, flags);
581
582 if (openpic_suspend_count++ > 0) {
583 spin_unlock_irqrestore(&openpic2_setup_lock, flags);
584 return 0;
585 }
586
587 open_pic2.enable = openpic2_cached_enable_irq;
588 open_pic2.disable = openpic2_cached_disable_irq;
589
590 for (i=0; i<NumProcessors; i++) {
591 save_cpu_task_pri[i] = openpic2_read(&OpenPIC2->Processor[i].Current_Task_Priority);
592 openpic2_writefield(&OpenPIC2->Processor[i].Current_Task_Priority,
593 OPENPIC_CURRENT_TASK_PRIORITY_MASK, 0xf);
594 }
595
596 for (i=0; i<OPENPIC_NUM_IPI; i++)
597 save_ipi_vp[i] = openpic2_read(&OpenPIC2->Global.IPI_Vector_Priority(i));
598 for (i=0; i<NumSources; i++) {
599 if (ISR[i] == 0)
600 continue;
601 save_irq_src_vp[i] = openpic2_read(&ISR[i]->Vector_Priority) & ~OPENPIC_ACTIVITY;
602 save_irq_src_dest[i] = openpic2_read(&ISR[i]->Destination);
603 }
604
605 spin_unlock_irqrestore(&openpic2_setup_lock, flags);
606
607 return 0;
608}
609
610/* WARNING: Can be called directly by the cpufreq code with NULL parameter,
611 * we need something better to deal with that... Maybe switch to S1 for
612 * cpufreq changes
613 */
614int openpic2_resume(struct sys_device *sysdev)
615{
616 int i;
617 unsigned long flags;
618 u32 vppmask = OPENPIC_PRIORITY_MASK | OPENPIC_VECTOR_MASK |
619 OPENPIC_SENSE_MASK | OPENPIC_POLARITY_MASK |
620 OPENPIC_MASK;
621
622 spin_lock_irqsave(&openpic2_setup_lock, flags);
623
624 if ((--openpic_suspend_count) > 0) {
625 spin_unlock_irqrestore(&openpic2_setup_lock, flags);
626 return 0;
627 }
628
629 openpic2_reset();
630
631 /* OpenPIC sometimes seem to need some time to be fully back up... */
632 do {
633 openpic2_set_spurious(OPENPIC2_VEC_SPURIOUS+open_pic2_irq_offset);
634 } while(openpic2_readfield(&OpenPIC2->Global.Spurious_Vector, OPENPIC_VECTOR_MASK)
635 != (OPENPIC2_VEC_SPURIOUS + open_pic2_irq_offset));
636
637 openpic2_disable_8259_pass_through();
638
639 for (i=0; i<OPENPIC_NUM_IPI; i++)
640 openpic2_write(&OpenPIC2->Global.IPI_Vector_Priority(i),
641 save_ipi_vp[i]);
642 for (i=0; i<NumSources; i++) {
643 if (ISR[i] == 0)
644 continue;
645 openpic2_write(&ISR[i]->Destination, save_irq_src_dest[i]);
646 openpic2_write(&ISR[i]->Vector_Priority, save_irq_src_vp[i]);
647 /* make sure mask gets to controller before we return to user */
648 do {
649 openpic2_write(&ISR[i]->Vector_Priority, save_irq_src_vp[i]);
650 } while (openpic2_readfield(&ISR[i]->Vector_Priority, vppmask)
651 != (save_irq_src_vp[i] & vppmask));
652 }
653 for (i=0; i<NumProcessors; i++)
654 openpic2_write(&OpenPIC2->Processor[i].Current_Task_Priority,
655 save_cpu_task_pri[i]);
656
657 open_pic2.enable = openpic2_enable_irq;
658 open_pic2.disable = openpic2_disable_irq;
659
660 spin_unlock_irqrestore(&openpic2_setup_lock, flags);
661
662 return 0;
663}
664
665#endif /* CONFIG_PM */
666
667/* HACK ALERT */
668static struct sysdev_class openpic2_sysclass = {
669 .name = "openpic2",
670};
671
672static struct sys_device device_openpic2 = {
673 .id = 0,
674 .cls = &openpic2_sysclass,
675};
676
677static struct sysdev_driver driver_openpic2 = {
678#ifdef CONFIG_PM
679 .suspend = &openpic2_suspend,
680 .resume = &openpic2_resume,
681#endif /* CONFIG_PM */
682};
683
684static int __init init_openpic2_sysfs(void)
685{
686 int rc;
687
688 if (!OpenPIC2_Addr)
689 return -ENODEV;
690 printk(KERN_DEBUG "Registering openpic2 with sysfs...\n");
691 rc = sysdev_class_register(&openpic2_sysclass);
692 if (rc) {
693 printk(KERN_ERR "Failed registering openpic sys class\n");
694 return -ENODEV;
695 }
696 rc = sysdev_register(&device_openpic2);
697 if (rc) {
698 printk(KERN_ERR "Failed registering openpic sys device\n");
699 return -ENODEV;
700 }
701 rc = sysdev_driver_register(&openpic2_sysclass, &driver_openpic2);
702 if (rc) {
703 printk(KERN_ERR "Failed registering openpic sys driver\n");
704 return -ENODEV;
705 }
706 return 0;
707}
708
709subsys_initcall(init_openpic2_sysfs);
710
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-27 19:27:20 -0500