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1/*
2 * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
3 * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
4 */
5
6#include <linux/kernel.h>
7#include <linux/errno.h>
8#include <linux/mutex.h>
9#include <linux/of.h>
10#include <linux/of_platform.h>
11#include <linux/interrupt.h>
12#include <linux/of_device.h>
13#include <linux/clocksource.h>
14#include <linux/clockchips.h>
15
16#include <asm/oplib.h>
17#include <asm/timer.h>
18#include <asm/prom.h>
19#include <asm/leon.h>
20#include <asm/leon_amba.h>
21#include <asm/traps.h>
22#include <asm/cacheflush.h>
23#include <asm/smp.h>
24#include <asm/setup.h>
25
26#include "kernel.h"
27#include "prom.h"
28#include "irq.h"
29
30struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
31struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */
32
33int leondebug_irq_disable;
34int leon_debug_irqout;
35static int dummy_master_l10_counter;
36unsigned long amba_system_id;
37static DEFINE_SPINLOCK(leon_irq_lock);
38
39unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
40unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
41int leon3_ticker_irq; /* Timer ticker IRQ */
42unsigned int sparc_leon_eirq;
43#define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
44#define LEON_IACK (&leon3_irqctrl_regs->iclear)
45#define LEON_DO_ACK_HW 1
46
47/* Return the last ACKed IRQ by the Extended IRQ controller. It has already
48 * been (automatically) ACKed when the CPU takes the trap.
49 */
50static inline unsigned int leon_eirq_get(int cpu)
51{
52 return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
53}
54
55/* Handle one or multiple IRQs from the extended interrupt controller */
56static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc)
57{
58 unsigned int eirq;
59 int cpu = sparc_leon3_cpuid();
60
61 eirq = leon_eirq_get(cpu);
62 if ((eirq & 0x10) && irq_map[eirq]->irq) /* bit4 tells if IRQ happened */
63 generic_handle_irq(irq_map[eirq]->irq);
64}
65
66/* The extended IRQ controller has been found, this function registers it */
67void leon_eirq_setup(unsigned int eirq)
68{
69 unsigned long mask, oldmask;
70 unsigned int veirq;
71
72 if (eirq < 1 || eirq > 0xf) {
73 printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
74 return;
75 }
76
77 veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);
78
79 /*
80 * Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
81 * controller have a mask-bit of their own, so this is safe.
82 */
83 irq_link(veirq);
84 mask = 1 << eirq;
85 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(boot_cpu_id));
86 LEON3_BYPASS_STORE_PA(LEON_IMASK(boot_cpu_id), (oldmask | mask));
87 sparc_leon_eirq = eirq;
88}
89
90unsigned long leon_get_irqmask(unsigned int irq)
91{
92 unsigned long mask;
93
94 if (!irq || ((irq > 0xf) && !sparc_leon_eirq)
95 || ((irq > 0x1f) && sparc_leon_eirq)) {
96 printk(KERN_ERR
97 "leon_get_irqmask: false irq number: %d\n", irq);
98 mask = 0;
99 } else {
100 mask = LEON_HARD_INT(irq);
101 }
102 return mask;
103}
104
105#ifdef CONFIG_SMP
106static int irq_choose_cpu(const struct cpumask *affinity)
107{
108 cpumask_t mask;
109
110 cpumask_and(&mask, cpu_online_mask, affinity);
111 if (cpumask_equal(&mask, cpu_online_mask) || cpumask_empty(&mask))
112 return boot_cpu_id;
113 else
114 return cpumask_first(&mask);
115}
116#else
117#define irq_choose_cpu(affinity) boot_cpu_id
118#endif
119
120static int leon_set_affinity(struct irq_data *data, const struct cpumask *dest,
121 bool force)
122{
123 unsigned long mask, oldmask, flags;
124 int oldcpu, newcpu;
125
126 mask = (unsigned long)data->chip_data;
127 oldcpu = irq_choose_cpu(data->affinity);
128 newcpu = irq_choose_cpu(dest);
129
130 if (oldcpu == newcpu)
131 goto out;
132
133 /* unmask on old CPU first before enabling on the selected CPU */
134 spin_lock_irqsave(&leon_irq_lock, flags);
135 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu));
136 LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask));
137 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu));
138 LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask | mask));
139 spin_unlock_irqrestore(&leon_irq_lock, flags);
140out:
141 return IRQ_SET_MASK_OK;
142}
143
144static void leon_unmask_irq(struct irq_data *data)
145{
146 unsigned long mask, oldmask, flags;
147 int cpu;
148
149 mask = (unsigned long)data->chip_data;
150 cpu = irq_choose_cpu(data->affinity);
151 spin_lock_irqsave(&leon_irq_lock, flags);
152 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
153 LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask | mask));
154 spin_unlock_irqrestore(&leon_irq_lock, flags);
155}
156
157static void leon_mask_irq(struct irq_data *data)
158{
159 unsigned long mask, oldmask, flags;
160 int cpu;
161
162 mask = (unsigned long)data->chip_data;
163 cpu = irq_choose_cpu(data->affinity);
164 spin_lock_irqsave(&leon_irq_lock, flags);
165 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
166 LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask));
167 spin_unlock_irqrestore(&leon_irq_lock, flags);
168}
169
170static unsigned int leon_startup_irq(struct irq_data *data)
171{
172 irq_link(data->irq);
173 leon_unmask_irq(data);
174 return 0;
175}
176
177static void leon_shutdown_irq(struct irq_data *data)
178{
179 leon_mask_irq(data);
180 irq_unlink(data->irq);
181}
182
183/* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
184static void leon_eoi_irq(struct irq_data *data)
185{
186 unsigned long mask = (unsigned long)data->chip_data;
187
188 if (mask & LEON_DO_ACK_HW)
189 LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
190}
191
192static struct irq_chip leon_irq = {
193 .name = "leon",
194 .irq_startup = leon_startup_irq,
195 .irq_shutdown = leon_shutdown_irq,
196 .irq_mask = leon_mask_irq,
197 .irq_unmask = leon_unmask_irq,
198 .irq_eoi = leon_eoi_irq,
199 .irq_set_affinity = leon_set_affinity,
200};
201
202/*
203 * Build a LEON IRQ for the edge triggered LEON IRQ controller:
204 * Edge (normal) IRQ - handle_simple_irq, ack=DONT-CARE, never ack
205 * Level IRQ (PCI|Level-GPIO) - handle_fasteoi_irq, ack=1, ack after ISR
206 * Per-CPU Edge - handle_percpu_irq, ack=0
207 */
208unsigned int leon_build_device_irq(unsigned int real_irq,
209 irq_flow_handler_t flow_handler,
210 const char *name, int do_ack)
211{
212 unsigned int irq;
213 unsigned long mask;
214
215 irq = 0;
216 mask = leon_get_irqmask(real_irq);
217 if (mask == 0)
218 goto out;
219
220 irq = irq_alloc(real_irq, real_irq);
221 if (irq == 0)
222 goto out;
223
224 if (do_ack)
225 mask |= LEON_DO_ACK_HW;
226
227 irq_set_chip_and_handler_name(irq, &leon_irq,
228 flow_handler, name);
229 irq_set_chip_data(irq, (void *)mask);
230
231out:
232 return irq;
233}
234
235static unsigned int _leon_build_device_irq(struct platform_device *op,
236 unsigned int real_irq)
237{
238 return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
239}
240
241void leon_update_virq_handling(unsigned int virq,
242 irq_flow_handler_t flow_handler,
243 const char *name, int do_ack)
244{
245 unsigned long mask = (unsigned long)irq_get_chip_data(virq);
246
247 mask &= ~LEON_DO_ACK_HW;
248 if (do_ack)
249 mask |= LEON_DO_ACK_HW;
250
251 irq_set_chip_and_handler_name(virq, &leon_irq,
252 flow_handler, name);
253 irq_set_chip_data(virq, (void *)mask);
254}
255
256static u32 leon_cycles_offset(void)
257{
258 u32 rld, val, off;
259 rld = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld);
260 val = LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val);
261 off = rld - val;
262 return rld - val;
263}
264
265#ifdef CONFIG_SMP
266
267/* smp clockevent irq */
268irqreturn_t leon_percpu_timer_ce_interrupt(int irq, void *unused)
269{
270 struct clock_event_device *ce;
271 int cpu = smp_processor_id();
272
273 leon_clear_profile_irq(cpu);
274
275 ce = &per_cpu(sparc32_clockevent, cpu);
276
277 irq_enter();
278 if (ce->event_handler)
279 ce->event_handler(ce);
280 irq_exit();
281
282 return IRQ_HANDLED;
283}
284
285#endif /* CONFIG_SMP */
286
287void __init leon_init_timers(void)
288{
289 int irq, eirq;
290 struct device_node *rootnp, *np, *nnp;
291 struct property *pp;
292 int len;
293 int icsel;
294 int ampopts;
295 int err;
296
297 sparc_config.get_cycles_offset = leon_cycles_offset;
298 sparc_config.cs_period = 1000000 / HZ;
299 sparc_config.features |= FEAT_L10_CLOCKSOURCE;
300
301#ifndef CONFIG_SMP
302 sparc_config.features |= FEAT_L10_CLOCKEVENT;
303#endif
304
305 leondebug_irq_disable = 0;
306 leon_debug_irqout = 0;
307 master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
308 dummy_master_l10_counter = 0;
309
310 rootnp = of_find_node_by_path("/ambapp0");
311 if (!rootnp)
312 goto bad;
313
314 /* Find System ID: GRLIB build ID and optional CHIP ID */
315 pp = of_find_property(rootnp, "systemid", &len);
316 if (pp)
317 amba_system_id = *(unsigned long *)pp->value;
318
319 /* Find IRQMP IRQ Controller Registers base adr otherwise bail out */
320 np = of_find_node_by_name(rootnp, "GAISLER_IRQMP");
321 if (!np) {
322 np = of_find_node_by_name(rootnp, "01_00d");
323 if (!np)
324 goto bad;
325 }
326 pp = of_find_property(np, "reg", &len);
327 if (!pp)
328 goto bad;
329 leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;
330
331 /* Find GPTIMER Timer Registers base address otherwise bail out. */
332 nnp = rootnp;
333 do {
334 np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
335 if (!np) {
336 np = of_find_node_by_name(nnp, "01_011");
337 if (!np)
338 goto bad;
339 }
340
341 ampopts = 0;
342 pp = of_find_property(np, "ampopts", &len);
343 if (pp) {
344 ampopts = *(int *)pp->value;
345 if (ampopts == 0) {
346 /* Skip this instance, resource already
347 * allocated by other OS */
348 nnp = np;
349 continue;
350 }
351 }
352
353 /* Select Timer-Instance on Timer Core. Default is zero */
354 leon3_gptimer_idx = ampopts & 0x7;
355
356 pp = of_find_property(np, "reg", &len);
357 if (pp)
358 leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
359 pp->value;
360 pp = of_find_property(np, "interrupts", &len);
361 if (pp)
362 leon3_gptimer_irq = *(unsigned int *)pp->value;
363 } while (0);
364
365 if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
366 goto bad;
367
368 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
369 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
370 (((1000000 / HZ) - 1)));
371 LEON3_BYPASS_STORE_PA(
372 &leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
373
374#ifdef CONFIG_SMP
375 leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
376
377 if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
378 (1<<LEON3_GPTIMER_SEPIRQ))) {
379 printk(KERN_ERR "timer not configured with separate irqs\n");
380 BUG();
381 }
382
383 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val,
384 0);
385 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
386 (((1000000/HZ) - 1)));
387 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
388 0);
389#endif
390
391 /*
392 * The IRQ controller may (if implemented) consist of multiple
393 * IRQ controllers, each mapped on a 4Kb boundary.
394 * Each CPU may be routed to different IRQCTRLs, however
395 * we assume that all CPUs (in SMP system) is routed to the
396 * same IRQ Controller, and for non-SMP only one IRQCTRL is
397 * accessed anyway.
398 * In AMP systems, Linux must run on CPU0 for the time being.
399 */
400 icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[boot_cpu_id/8]);
401 icsel = (icsel >> ((7 - (boot_cpu_id&0x7)) * 4)) & 0xf;
402 leon3_irqctrl_regs += icsel;
403
404 /* Mask all IRQs on boot-cpu IRQ controller */
405 LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[boot_cpu_id], 0);
406
407 /* Probe extended IRQ controller */
408 eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
409 >> 16) & 0xf;
410 if (eirq != 0)
411 leon_eirq_setup(eirq);
412
413 irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
414 err = request_irq(irq, timer_interrupt, IRQF_TIMER, "timer", NULL);
415 if (err) {
416 printk(KERN_ERR "unable to attach timer IRQ%d\n", irq);
417 prom_halt();
418 }
419
420#ifdef CONFIG_SMP
421 {
422 unsigned long flags;
423
424 /*
425 * In SMP, sun4m adds a IPI handler to IRQ trap handler that
426 * LEON never must take, sun4d and LEON overwrites the branch
427 * with a NOP.
428 */
429 local_irq_save(flags);
430 patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
431 local_ops->cache_all();
432 local_irq_restore(flags);
433 }
434#endif
435
436 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
437 LEON3_GPTIMER_EN |
438 LEON3_GPTIMER_RL |
439 LEON3_GPTIMER_LD |
440 LEON3_GPTIMER_IRQEN);
441
442#ifdef CONFIG_SMP
443 /* Install per-cpu IRQ handler for broadcasted ticker */
444 irq = leon_build_device_irq(leon3_ticker_irq, handle_percpu_irq,
445 "per-cpu", 0);
446 err = request_irq(irq, leon_percpu_timer_ce_interrupt,
447 IRQF_PERCPU | IRQF_TIMER, "ticker",
448 NULL);
449 if (err) {
450 printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
451 prom_halt();
452 }
453
454 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
455 LEON3_GPTIMER_EN |
456 LEON3_GPTIMER_RL |
457 LEON3_GPTIMER_LD |
458 LEON3_GPTIMER_IRQEN);
459#endif
460 return;
461bad:
462 printk(KERN_ERR "No Timer/irqctrl found\n");
463 BUG();
464 return;
465}
466
467static void leon_clear_clock_irq(void)
468{
469}
470
471static void leon_load_profile_irq(int cpu, unsigned int limit)
472{
473}
474
475void __init leon_trans_init(struct device_node *dp)
476{
477 if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
478 struct property *p;
479 p = of_find_property(dp, "mid", (void *)0);
480 if (p) {
481 int mid;
482 dp->name = prom_early_alloc(5 + 1);
483 memcpy(&mid, p->value, p->length);
484 sprintf((char *)dp->name, "cpu%.2d", mid);
485 }
486 }
487}
488
489void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0;
490
491void __init leon_node_init(struct device_node *dp, struct device_node ***nextp)
492{
493 if (prom_amba_init &&
494 strcmp(dp->type, "ambapp") == 0 &&
495 strcmp(dp->name, "ambapp0") == 0) {
496 prom_amba_init(dp, nextp);
497 }
498}
499
500#ifdef CONFIG_SMP
501void leon_clear_profile_irq(int cpu)
502{
503}
504
505void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
506{
507 unsigned long mask, flags, *addr;
508 mask = leon_get_irqmask(irq_nr);
509 spin_lock_irqsave(&leon_irq_lock, flags);
510 addr = (unsigned long *)LEON_IMASK(cpu);
511 LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | mask));
512 spin_unlock_irqrestore(&leon_irq_lock, flags);
513}
514
515#endif
516
517void __init leon_init_IRQ(void)
518{
519 sparc_config.init_timers = leon_init_timers;
520 sparc_config.build_device_irq = _leon_build_device_irq;
521 sparc_config.clock_rate = 1000000;
522 sparc_config.clear_clock_irq = leon_clear_clock_irq;
523 sparc_config.load_profile_irq = leon_load_profile_irq;
524}
525
526void __init leon_init(void)
527{
528 of_pdt_build_more = &leon_node_init;
529}
1/*
2 * Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
3 * Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
4 */
5
6#include <linux/kernel.h>
7#include <linux/module.h>
8#include <linux/errno.h>
9#include <linux/mutex.h>
10#include <linux/of.h>
11#include <linux/of_platform.h>
12#include <linux/interrupt.h>
13#include <linux/of_device.h>
14
15#include <asm/oplib.h>
16#include <asm/timer.h>
17#include <asm/prom.h>
18#include <asm/leon.h>
19#include <asm/leon_amba.h>
20#include <asm/traps.h>
21#include <asm/cacheflush.h>
22#include <asm/smp.h>
23#include <asm/setup.h>
24
25#include "prom.h"
26#include "irq.h"
27
28struct leon3_irqctrl_regs_map *leon3_irqctrl_regs; /* interrupt controller base address */
29struct leon3_gptimer_regs_map *leon3_gptimer_regs; /* timer controller base address */
30
31int leondebug_irq_disable;
32int leon_debug_irqout;
33static int dummy_master_l10_counter;
34unsigned long amba_system_id;
35static DEFINE_SPINLOCK(leon_irq_lock);
36
37unsigned long leon3_gptimer_irq; /* interrupt controller irq number */
38unsigned long leon3_gptimer_idx; /* Timer Index (0..6) within Timer Core */
39int leon3_ticker_irq; /* Timer ticker IRQ */
40unsigned int sparc_leon_eirq;
41#define LEON_IMASK(cpu) (&leon3_irqctrl_regs->mask[cpu])
42#define LEON_IACK (&leon3_irqctrl_regs->iclear)
43#define LEON_DO_ACK_HW 1
44
45/* Return the last ACKed IRQ by the Extended IRQ controller. It has already
46 * been (automatically) ACKed when the CPU takes the trap.
47 */
48static inline unsigned int leon_eirq_get(int cpu)
49{
50 return LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->intid[cpu]) & 0x1f;
51}
52
53/* Handle one or multiple IRQs from the extended interrupt controller */
54static void leon_handle_ext_irq(unsigned int irq, struct irq_desc *desc)
55{
56 unsigned int eirq;
57 int cpu = sparc_leon3_cpuid();
58
59 eirq = leon_eirq_get(cpu);
60 if ((eirq & 0x10) && irq_map[eirq]->irq) /* bit4 tells if IRQ happened */
61 generic_handle_irq(irq_map[eirq]->irq);
62}
63
64/* The extended IRQ controller has been found, this function registers it */
65void leon_eirq_setup(unsigned int eirq)
66{
67 unsigned long mask, oldmask;
68 unsigned int veirq;
69
70 if (eirq < 1 || eirq > 0xf) {
71 printk(KERN_ERR "LEON EXT IRQ NUMBER BAD: %d\n", eirq);
72 return;
73 }
74
75 veirq = leon_build_device_irq(eirq, leon_handle_ext_irq, "extirq", 0);
76
77 /*
78 * Unmask the Extended IRQ, the IRQs routed through the Ext-IRQ
79 * controller have a mask-bit of their own, so this is safe.
80 */
81 irq_link(veirq);
82 mask = 1 << eirq;
83 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(boot_cpu_id));
84 LEON3_BYPASS_STORE_PA(LEON_IMASK(boot_cpu_id), (oldmask | mask));
85 sparc_leon_eirq = eirq;
86}
87
88static inline unsigned long get_irqmask(unsigned int irq)
89{
90 unsigned long mask;
91
92 if (!irq || ((irq > 0xf) && !sparc_leon_eirq)
93 || ((irq > 0x1f) && sparc_leon_eirq)) {
94 printk(KERN_ERR
95 "leon_get_irqmask: false irq number: %d\n", irq);
96 mask = 0;
97 } else {
98 mask = LEON_HARD_INT(irq);
99 }
100 return mask;
101}
102
103#ifdef CONFIG_SMP
104static int irq_choose_cpu(const struct cpumask *affinity)
105{
106 cpumask_t mask;
107
108 cpus_and(mask, cpu_online_map, *affinity);
109 if (cpus_equal(mask, cpu_online_map) || cpus_empty(mask))
110 return boot_cpu_id;
111 else
112 return first_cpu(mask);
113}
114#else
115#define irq_choose_cpu(affinity) boot_cpu_id
116#endif
117
118static int leon_set_affinity(struct irq_data *data, const struct cpumask *dest,
119 bool force)
120{
121 unsigned long mask, oldmask, flags;
122 int oldcpu, newcpu;
123
124 mask = (unsigned long)data->chip_data;
125 oldcpu = irq_choose_cpu(data->affinity);
126 newcpu = irq_choose_cpu(dest);
127
128 if (oldcpu == newcpu)
129 goto out;
130
131 /* unmask on old CPU first before enabling on the selected CPU */
132 spin_lock_irqsave(&leon_irq_lock, flags);
133 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(oldcpu));
134 LEON3_BYPASS_STORE_PA(LEON_IMASK(oldcpu), (oldmask & ~mask));
135 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(newcpu));
136 LEON3_BYPASS_STORE_PA(LEON_IMASK(newcpu), (oldmask | mask));
137 spin_unlock_irqrestore(&leon_irq_lock, flags);
138out:
139 return IRQ_SET_MASK_OK;
140}
141
142static void leon_unmask_irq(struct irq_data *data)
143{
144 unsigned long mask, oldmask, flags;
145 int cpu;
146
147 mask = (unsigned long)data->chip_data;
148 cpu = irq_choose_cpu(data->affinity);
149 spin_lock_irqsave(&leon_irq_lock, flags);
150 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
151 LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask | mask));
152 spin_unlock_irqrestore(&leon_irq_lock, flags);
153}
154
155static void leon_mask_irq(struct irq_data *data)
156{
157 unsigned long mask, oldmask, flags;
158 int cpu;
159
160 mask = (unsigned long)data->chip_data;
161 cpu = irq_choose_cpu(data->affinity);
162 spin_lock_irqsave(&leon_irq_lock, flags);
163 oldmask = LEON3_BYPASS_LOAD_PA(LEON_IMASK(cpu));
164 LEON3_BYPASS_STORE_PA(LEON_IMASK(cpu), (oldmask & ~mask));
165 spin_unlock_irqrestore(&leon_irq_lock, flags);
166}
167
168static unsigned int leon_startup_irq(struct irq_data *data)
169{
170 irq_link(data->irq);
171 leon_unmask_irq(data);
172 return 0;
173}
174
175static void leon_shutdown_irq(struct irq_data *data)
176{
177 leon_mask_irq(data);
178 irq_unlink(data->irq);
179}
180
181/* Used by external level sensitive IRQ handlers on the LEON: ACK IRQ ctrl */
182static void leon_eoi_irq(struct irq_data *data)
183{
184 unsigned long mask = (unsigned long)data->chip_data;
185
186 if (mask & LEON_DO_ACK_HW)
187 LEON3_BYPASS_STORE_PA(LEON_IACK, mask & ~LEON_DO_ACK_HW);
188}
189
190static struct irq_chip leon_irq = {
191 .name = "leon",
192 .irq_startup = leon_startup_irq,
193 .irq_shutdown = leon_shutdown_irq,
194 .irq_mask = leon_mask_irq,
195 .irq_unmask = leon_unmask_irq,
196 .irq_eoi = leon_eoi_irq,
197 .irq_set_affinity = leon_set_affinity,
198};
199
200/*
201 * Build a LEON IRQ for the edge triggered LEON IRQ controller:
202 * Edge (normal) IRQ - handle_simple_irq, ack=DONT-CARE, never ack
203 * Level IRQ (PCI|Level-GPIO) - handle_fasteoi_irq, ack=1, ack after ISR
204 * Per-CPU Edge - handle_percpu_irq, ack=0
205 */
206unsigned int leon_build_device_irq(unsigned int real_irq,
207 irq_flow_handler_t flow_handler,
208 const char *name, int do_ack)
209{
210 unsigned int irq;
211 unsigned long mask;
212
213 irq = 0;
214 mask = get_irqmask(real_irq);
215 if (mask == 0)
216 goto out;
217
218 irq = irq_alloc(real_irq, real_irq);
219 if (irq == 0)
220 goto out;
221
222 if (do_ack)
223 mask |= LEON_DO_ACK_HW;
224
225 irq_set_chip_and_handler_name(irq, &leon_irq,
226 flow_handler, name);
227 irq_set_chip_data(irq, (void *)mask);
228
229out:
230 return irq;
231}
232
233static unsigned int _leon_build_device_irq(struct platform_device *op,
234 unsigned int real_irq)
235{
236 return leon_build_device_irq(real_irq, handle_simple_irq, "edge", 0);
237}
238
239void leon_update_virq_handling(unsigned int virq,
240 irq_flow_handler_t flow_handler,
241 const char *name, int do_ack)
242{
243 unsigned long mask = (unsigned long)irq_get_chip_data(virq);
244
245 mask &= ~LEON_DO_ACK_HW;
246 if (do_ack)
247 mask |= LEON_DO_ACK_HW;
248
249 irq_set_chip_and_handler_name(virq, &leon_irq,
250 flow_handler, name);
251 irq_set_chip_data(virq, (void *)mask);
252}
253
254void __init leon_init_timers(irq_handler_t counter_fn)
255{
256 int irq, eirq;
257 struct device_node *rootnp, *np, *nnp;
258 struct property *pp;
259 int len;
260 int icsel;
261 int ampopts;
262 int err;
263
264 leondebug_irq_disable = 0;
265 leon_debug_irqout = 0;
266 master_l10_counter = (unsigned int *)&dummy_master_l10_counter;
267 dummy_master_l10_counter = 0;
268
269 rootnp = of_find_node_by_path("/ambapp0");
270 if (!rootnp)
271 goto bad;
272
273 /* Find System ID: GRLIB build ID and optional CHIP ID */
274 pp = of_find_property(rootnp, "systemid", &len);
275 if (pp)
276 amba_system_id = *(unsigned long *)pp->value;
277
278 /* Find IRQMP IRQ Controller Registers base adr otherwise bail out */
279 np = of_find_node_by_name(rootnp, "GAISLER_IRQMP");
280 if (!np) {
281 np = of_find_node_by_name(rootnp, "01_00d");
282 if (!np)
283 goto bad;
284 }
285 pp = of_find_property(np, "reg", &len);
286 if (!pp)
287 goto bad;
288 leon3_irqctrl_regs = *(struct leon3_irqctrl_regs_map **)pp->value;
289
290 /* Find GPTIMER Timer Registers base address otherwise bail out. */
291 nnp = rootnp;
292 do {
293 np = of_find_node_by_name(nnp, "GAISLER_GPTIMER");
294 if (!np) {
295 np = of_find_node_by_name(nnp, "01_011");
296 if (!np)
297 goto bad;
298 }
299
300 ampopts = 0;
301 pp = of_find_property(np, "ampopts", &len);
302 if (pp) {
303 ampopts = *(int *)pp->value;
304 if (ampopts == 0) {
305 /* Skip this instance, resource already
306 * allocated by other OS */
307 nnp = np;
308 continue;
309 }
310 }
311
312 /* Select Timer-Instance on Timer Core. Default is zero */
313 leon3_gptimer_idx = ampopts & 0x7;
314
315 pp = of_find_property(np, "reg", &len);
316 if (pp)
317 leon3_gptimer_regs = *(struct leon3_gptimer_regs_map **)
318 pp->value;
319 pp = of_find_property(np, "interrupts", &len);
320 if (pp)
321 leon3_gptimer_irq = *(unsigned int *)pp->value;
322 } while (0);
323
324 if (!(leon3_gptimer_regs && leon3_irqctrl_regs && leon3_gptimer_irq))
325 goto bad;
326
327 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].val, 0);
328 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].rld,
329 (((1000000 / HZ) - 1)));
330 LEON3_BYPASS_STORE_PA(
331 &leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl, 0);
332
333#ifdef CONFIG_SMP
334 leon3_ticker_irq = leon3_gptimer_irq + 1 + leon3_gptimer_idx;
335
336 if (!(LEON3_BYPASS_LOAD_PA(&leon3_gptimer_regs->config) &
337 (1<<LEON3_GPTIMER_SEPIRQ))) {
338 printk(KERN_ERR "timer not configured with separate irqs\n");
339 BUG();
340 }
341
342 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].val,
343 0);
344 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].rld,
345 (((1000000/HZ) - 1)));
346 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
347 0);
348#endif
349
350 /*
351 * The IRQ controller may (if implemented) consist of multiple
352 * IRQ controllers, each mapped on a 4Kb boundary.
353 * Each CPU may be routed to different IRQCTRLs, however
354 * we assume that all CPUs (in SMP system) is routed to the
355 * same IRQ Controller, and for non-SMP only one IRQCTRL is
356 * accessed anyway.
357 * In AMP systems, Linux must run on CPU0 for the time being.
358 */
359 icsel = LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->icsel[boot_cpu_id/8]);
360 icsel = (icsel >> ((7 - (boot_cpu_id&0x7)) * 4)) & 0xf;
361 leon3_irqctrl_regs += icsel;
362
363 /* Mask all IRQs on boot-cpu IRQ controller */
364 LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->mask[boot_cpu_id], 0);
365
366 /* Probe extended IRQ controller */
367 eirq = (LEON3_BYPASS_LOAD_PA(&leon3_irqctrl_regs->mpstatus)
368 >> 16) & 0xf;
369 if (eirq != 0)
370 leon_eirq_setup(eirq);
371
372 irq = _leon_build_device_irq(NULL, leon3_gptimer_irq+leon3_gptimer_idx);
373 err = request_irq(irq, counter_fn, IRQF_TIMER, "timer", NULL);
374 if (err) {
375 printk(KERN_ERR "unable to attach timer IRQ%d\n", irq);
376 prom_halt();
377 }
378
379#ifdef CONFIG_SMP
380 {
381 unsigned long flags;
382
383 /*
384 * In SMP, sun4m adds a IPI handler to IRQ trap handler that
385 * LEON never must take, sun4d and LEON overwrites the branch
386 * with a NOP.
387 */
388 local_irq_save(flags);
389 patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
390 local_flush_cache_all();
391 local_irq_restore(flags);
392 }
393#endif
394
395 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
396 LEON3_GPTIMER_EN |
397 LEON3_GPTIMER_RL |
398 LEON3_GPTIMER_LD |
399 LEON3_GPTIMER_IRQEN);
400
401#ifdef CONFIG_SMP
402 /* Install per-cpu IRQ handler for broadcasted ticker */
403 irq = leon_build_device_irq(leon3_ticker_irq, handle_percpu_irq,
404 "per-cpu", 0);
405 err = request_irq(irq, leon_percpu_timer_interrupt,
406 IRQF_PERCPU | IRQF_TIMER, "ticker",
407 NULL);
408 if (err) {
409 printk(KERN_ERR "unable to attach ticker IRQ%d\n", irq);
410 prom_halt();
411 }
412
413 LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx+1].ctrl,
414 LEON3_GPTIMER_EN |
415 LEON3_GPTIMER_RL |
416 LEON3_GPTIMER_LD |
417 LEON3_GPTIMER_IRQEN);
418#endif
419 return;
420bad:
421 printk(KERN_ERR "No Timer/irqctrl found\n");
422 BUG();
423 return;
424}
425
426void leon_clear_clock_irq(void)
427{
428}
429
430void leon_load_profile_irq(int cpu, unsigned int limit)
431{
432 BUG();
433}
434
435void __init leon_trans_init(struct device_node *dp)
436{
437 if (strcmp(dp->type, "cpu") == 0 && strcmp(dp->name, "<NULL>") == 0) {
438 struct property *p;
439 p = of_find_property(dp, "mid", (void *)0);
440 if (p) {
441 int mid;
442 dp->name = prom_early_alloc(5 + 1);
443 memcpy(&mid, p->value, p->length);
444 sprintf((char *)dp->name, "cpu%.2d", mid);
445 }
446 }
447}
448
449void __initdata (*prom_amba_init)(struct device_node *dp, struct device_node ***nextp) = 0;
450
451void __init leon_node_init(struct device_node *dp, struct device_node ***nextp)
452{
453 if (prom_amba_init &&
454 strcmp(dp->type, "ambapp") == 0 &&
455 strcmp(dp->name, "ambapp0") == 0) {
456 prom_amba_init(dp, nextp);
457 }
458}
459
460#ifdef CONFIG_SMP
461
462void leon_set_cpu_int(int cpu, int level)
463{
464 unsigned long mask;
465 mask = get_irqmask(level);
466 LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask);
467}
468
469static void leon_clear_ipi(int cpu, int level)
470{
471 unsigned long mask;
472 mask = get_irqmask(level);
473 LEON3_BYPASS_STORE_PA(&leon3_irqctrl_regs->force[cpu], mask<<16);
474}
475
476static void leon_set_udt(int cpu)
477{
478}
479
480void leon_clear_profile_irq(int cpu)
481{
482}
483
484void leon_enable_irq_cpu(unsigned int irq_nr, unsigned int cpu)
485{
486 unsigned long mask, flags, *addr;
487 mask = get_irqmask(irq_nr);
488 spin_lock_irqsave(&leon_irq_lock, flags);
489 addr = (unsigned long *)LEON_IMASK(cpu);
490 LEON3_BYPASS_STORE_PA(addr, (LEON3_BYPASS_LOAD_PA(addr) | mask));
491 spin_unlock_irqrestore(&leon_irq_lock, flags);
492}
493
494#endif
495
496void __init leon_init_IRQ(void)
497{
498 sparc_irq_config.init_timers = leon_init_timers;
499 sparc_irq_config.build_device_irq = _leon_build_device_irq;
500
501 BTFIXUPSET_CALL(clear_clock_irq, leon_clear_clock_irq,
502 BTFIXUPCALL_NORM);
503 BTFIXUPSET_CALL(load_profile_irq, leon_load_profile_irq,
504 BTFIXUPCALL_NOP);
505
506#ifdef CONFIG_SMP
507 BTFIXUPSET_CALL(set_cpu_int, leon_set_cpu_int, BTFIXUPCALL_NORM);
508 BTFIXUPSET_CALL(clear_cpu_int, leon_clear_ipi, BTFIXUPCALL_NORM);
509 BTFIXUPSET_CALL(set_irq_udt, leon_set_udt, BTFIXUPCALL_NORM);
510#endif
511
512}
513
514void __init leon_init(void)
515{
516 of_pdt_build_more = &leon_node_init;
517}