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1/* Sparc SS1000/SC2000 SMP support.
2 *
3 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4 *
5 * Based on sun4m's smp.c, which is:
6 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
7 */
8
9#include <linux/clockchips.h>
10#include <linux/interrupt.h>
11#include <linux/profile.h>
12#include <linux/delay.h>
13#include <linux/sched.h>
14#include <linux/cpu.h>
15
16#include <asm/cacheflush.h>
17#include <asm/switch_to.h>
18#include <asm/tlbflush.h>
19#include <asm/timer.h>
20#include <asm/oplib.h>
21#include <asm/sbi.h>
22#include <asm/mmu.h>
23
24#include "kernel.h"
25#include "irq.h"
26
27#define IRQ_CROSS_CALL 15
28
29static volatile int smp_processors_ready;
30static int smp_highest_cpu;
31
32static inline unsigned long sun4d_swap(volatile unsigned long *ptr, unsigned long val)
33{
34 __asm__ __volatile__("swap [%1], %0\n\t" :
35 "=&r" (val), "=&r" (ptr) :
36 "0" (val), "1" (ptr));
37 return val;
38}
39
40static void smp4d_ipi_init(void);
41
42static unsigned char cpu_leds[32];
43
44static inline void show_leds(int cpuid)
45{
46 cpuid &= 0x1e;
47 __asm__ __volatile__ ("stba %0, [%1] %2" : :
48 "r" ((cpu_leds[cpuid] << 4) | cpu_leds[cpuid+1]),
49 "r" (ECSR_BASE(cpuid) | BB_LEDS),
50 "i" (ASI_M_CTL));
51}
52
53void __cpuinit smp4d_callin(void)
54{
55 int cpuid = hard_smp_processor_id();
56 unsigned long flags;
57
58 /* Show we are alive */
59 cpu_leds[cpuid] = 0x6;
60 show_leds(cpuid);
61
62 /* Enable level15 interrupt, disable level14 interrupt for now */
63 cc_set_imsk((cc_get_imsk() & ~0x8000) | 0x4000);
64
65 local_ops->cache_all();
66 local_ops->tlb_all();
67
68 notify_cpu_starting(cpuid);
69 /*
70 * Unblock the master CPU _only_ when the scheduler state
71 * of all secondary CPUs will be up-to-date, so after
72 * the SMP initialization the master will be just allowed
73 * to call the scheduler code.
74 */
75 /* Get our local ticker going. */
76 register_percpu_ce(cpuid);
77
78 calibrate_delay();
79 smp_store_cpu_info(cpuid);
80 local_ops->cache_all();
81 local_ops->tlb_all();
82
83 /* Allow master to continue. */
84 sun4d_swap((unsigned long *)&cpu_callin_map[cpuid], 1);
85 local_ops->cache_all();
86 local_ops->tlb_all();
87
88 while ((unsigned long)current_set[cpuid] < PAGE_OFFSET)
89 barrier();
90
91 while (current_set[cpuid]->cpu != cpuid)
92 barrier();
93
94 /* Fix idle thread fields. */
95 __asm__ __volatile__("ld [%0], %%g6\n\t"
96 : : "r" (¤t_set[cpuid])
97 : "memory" /* paranoid */);
98
99 cpu_leds[cpuid] = 0x9;
100 show_leds(cpuid);
101
102 /* Attach to the address space of init_task. */
103 atomic_inc(&init_mm.mm_count);
104 current->active_mm = &init_mm;
105
106 local_ops->cache_all();
107 local_ops->tlb_all();
108
109 local_irq_enable(); /* We don't allow PIL 14 yet */
110
111 while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
112 barrier();
113
114 spin_lock_irqsave(&sun4d_imsk_lock, flags);
115 cc_set_imsk(cc_get_imsk() & ~0x4000); /* Allow PIL 14 as well */
116 spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
117 set_cpu_online(cpuid, true);
118
119}
120
121/*
122 * Cycle through the processors asking the PROM to start each one.
123 */
124void __init smp4d_boot_cpus(void)
125{
126 smp4d_ipi_init();
127 if (boot_cpu_id)
128 current_set[0] = NULL;
129 local_ops->cache_all();
130}
131
132int __cpuinit smp4d_boot_one_cpu(int i, struct task_struct *idle)
133{
134 unsigned long *entry = &sun4d_cpu_startup;
135 int timeout;
136 int cpu_node;
137
138 cpu_find_by_instance(i, &cpu_node, NULL);
139 current_set[i] = task_thread_info(idle);
140 /*
141 * Initialize the contexts table
142 * Since the call to prom_startcpu() trashes the structure,
143 * we need to re-initialize it for each cpu
144 */
145 smp_penguin_ctable.which_io = 0;
146 smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
147 smp_penguin_ctable.reg_size = 0;
148
149 /* whirrr, whirrr, whirrrrrrrrr... */
150 printk(KERN_INFO "Starting CPU %d at %p\n", i, entry);
151 local_ops->cache_all();
152 prom_startcpu(cpu_node,
153 &smp_penguin_ctable, 0, (char *)entry);
154
155 printk(KERN_INFO "prom_startcpu returned :)\n");
156
157 /* wheee... it's going... */
158 for (timeout = 0; timeout < 10000; timeout++) {
159 if (cpu_callin_map[i])
160 break;
161 udelay(200);
162 }
163
164 if (!(cpu_callin_map[i])) {
165 printk(KERN_ERR "Processor %d is stuck.\n", i);
166 return -ENODEV;
167
168 }
169 local_ops->cache_all();
170 return 0;
171}
172
173void __init smp4d_smp_done(void)
174{
175 int i, first;
176 int *prev;
177
178 /* setup cpu list for irq rotation */
179 first = 0;
180 prev = &first;
181 for_each_online_cpu(i) {
182 *prev = i;
183 prev = &cpu_data(i).next;
184 }
185 *prev = first;
186 local_ops->cache_all();
187
188 /* Ok, they are spinning and ready to go. */
189 smp_processors_ready = 1;
190 sun4d_distribute_irqs();
191}
192
193/* Memory structure giving interrupt handler information about IPI generated */
194struct sun4d_ipi_work {
195 int single;
196 int msk;
197 int resched;
198};
199
200static DEFINE_PER_CPU_SHARED_ALIGNED(struct sun4d_ipi_work, sun4d_ipi_work);
201
202/* Initialize IPIs on the SUN4D SMP machine */
203static void __init smp4d_ipi_init(void)
204{
205 int cpu;
206 struct sun4d_ipi_work *work;
207
208 printk(KERN_INFO "smp4d: setup IPI at IRQ %d\n", SUN4D_IPI_IRQ);
209
210 for_each_possible_cpu(cpu) {
211 work = &per_cpu(sun4d_ipi_work, cpu);
212 work->single = work->msk = work->resched = 0;
213 }
214}
215
216void sun4d_ipi_interrupt(void)
217{
218 struct sun4d_ipi_work *work = &__get_cpu_var(sun4d_ipi_work);
219
220 if (work->single) {
221 work->single = 0;
222 smp_call_function_single_interrupt();
223 }
224 if (work->msk) {
225 work->msk = 0;
226 smp_call_function_interrupt();
227 }
228 if (work->resched) {
229 work->resched = 0;
230 smp_resched_interrupt();
231 }
232}
233
234/* +-------+-------------+-----------+------------------------------------+
235 * | bcast | devid | sid | levels mask |
236 * +-------+-------------+-----------+------------------------------------+
237 * 31 30 23 22 15 14 0
238 */
239#define IGEN_MESSAGE(bcast, devid, sid, levels) \
240 (((bcast) << 31) | ((devid) << 23) | ((sid) << 15) | (levels))
241
242static void sun4d_send_ipi(int cpu, int level)
243{
244 cc_set_igen(IGEN_MESSAGE(0, cpu << 3, 6 + ((level >> 1) & 7), 1 << (level - 1)));
245}
246
247static void sun4d_ipi_single(int cpu)
248{
249 struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
250
251 /* Mark work */
252 work->single = 1;
253
254 /* Generate IRQ on the CPU */
255 sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
256}
257
258static void sun4d_ipi_mask_one(int cpu)
259{
260 struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
261
262 /* Mark work */
263 work->msk = 1;
264
265 /* Generate IRQ on the CPU */
266 sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
267}
268
269static void sun4d_ipi_resched(int cpu)
270{
271 struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
272
273 /* Mark work */
274 work->resched = 1;
275
276 /* Generate IRQ on the CPU (any IRQ will cause resched) */
277 sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
278}
279
280static struct smp_funcall {
281 smpfunc_t func;
282 unsigned long arg1;
283 unsigned long arg2;
284 unsigned long arg3;
285 unsigned long arg4;
286 unsigned long arg5;
287 unsigned char processors_in[NR_CPUS]; /* Set when ipi entered. */
288 unsigned char processors_out[NR_CPUS]; /* Set when ipi exited. */
289} ccall_info __attribute__((aligned(8)));
290
291static DEFINE_SPINLOCK(cross_call_lock);
292
293/* Cross calls must be serialized, at least currently. */
294static void sun4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
295 unsigned long arg2, unsigned long arg3,
296 unsigned long arg4)
297{
298 if (smp_processors_ready) {
299 register int high = smp_highest_cpu;
300 unsigned long flags;
301
302 spin_lock_irqsave(&cross_call_lock, flags);
303
304 {
305 /*
306 * If you make changes here, make sure
307 * gcc generates proper code...
308 */
309 register smpfunc_t f asm("i0") = func;
310 register unsigned long a1 asm("i1") = arg1;
311 register unsigned long a2 asm("i2") = arg2;
312 register unsigned long a3 asm("i3") = arg3;
313 register unsigned long a4 asm("i4") = arg4;
314 register unsigned long a5 asm("i5") = 0;
315
316 __asm__ __volatile__(
317 "std %0, [%6]\n\t"
318 "std %2, [%6 + 8]\n\t"
319 "std %4, [%6 + 16]\n\t" : :
320 "r"(f), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5),
321 "r" (&ccall_info.func));
322 }
323
324 /* Init receive/complete mapping, plus fire the IPI's off. */
325 {
326 register int i;
327
328 cpumask_clear_cpu(smp_processor_id(), &mask);
329 cpumask_and(&mask, cpu_online_mask, &mask);
330 for (i = 0; i <= high; i++) {
331 if (cpumask_test_cpu(i, &mask)) {
332 ccall_info.processors_in[i] = 0;
333 ccall_info.processors_out[i] = 0;
334 sun4d_send_ipi(i, IRQ_CROSS_CALL);
335 }
336 }
337 }
338
339 {
340 register int i;
341
342 i = 0;
343 do {
344 if (!cpumask_test_cpu(i, &mask))
345 continue;
346 while (!ccall_info.processors_in[i])
347 barrier();
348 } while (++i <= high);
349
350 i = 0;
351 do {
352 if (!cpumask_test_cpu(i, &mask))
353 continue;
354 while (!ccall_info.processors_out[i])
355 barrier();
356 } while (++i <= high);
357 }
358
359 spin_unlock_irqrestore(&cross_call_lock, flags);
360 }
361}
362
363/* Running cross calls. */
364void smp4d_cross_call_irq(void)
365{
366 int i = hard_smp_processor_id();
367
368 ccall_info.processors_in[i] = 1;
369 ccall_info.func(ccall_info.arg1, ccall_info.arg2, ccall_info.arg3,
370 ccall_info.arg4, ccall_info.arg5);
371 ccall_info.processors_out[i] = 1;
372}
373
374void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
375{
376 struct pt_regs *old_regs;
377 int cpu = hard_smp_processor_id();
378 struct clock_event_device *ce;
379 static int cpu_tick[NR_CPUS];
380 static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd };
381
382 old_regs = set_irq_regs(regs);
383 bw_get_prof_limit(cpu);
384 bw_clear_intr_mask(0, 1); /* INTR_TABLE[0] & 1 is Profile IRQ */
385
386 cpu_tick[cpu]++;
387 if (!(cpu_tick[cpu] & 15)) {
388 if (cpu_tick[cpu] == 0x60)
389 cpu_tick[cpu] = 0;
390 cpu_leds[cpu] = led_mask[cpu_tick[cpu] >> 4];
391 show_leds(cpu);
392 }
393
394 ce = &per_cpu(sparc32_clockevent, cpu);
395
396 irq_enter();
397 ce->event_handler(ce);
398 irq_exit();
399
400 set_irq_regs(old_regs);
401}
402
403static const struct sparc32_ipi_ops sun4d_ipi_ops = {
404 .cross_call = sun4d_cross_call,
405 .resched = sun4d_ipi_resched,
406 .single = sun4d_ipi_single,
407 .mask_one = sun4d_ipi_mask_one,
408};
409
410void __init sun4d_init_smp(void)
411{
412 int i;
413
414 /* Patch ipi15 trap table */
415 t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_sun4d - linux_trap_ipi15_sun4m);
416
417 sparc32_ipi_ops = &sun4d_ipi_ops;
418
419 for (i = 0; i < NR_CPUS; i++) {
420 ccall_info.processors_in[i] = 1;
421 ccall_info.processors_out[i] = 1;
422 }
423}
1/* Sparc SS1000/SC2000 SMP support.
2 *
3 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4 *
5 * Based on sun4m's smp.c, which is:
6 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
7 */
8
9#include <linux/clockchips.h>
10#include <linux/interrupt.h>
11#include <linux/profile.h>
12#include <linux/delay.h>
13#include <linux/sched.h>
14#include <linux/cpu.h>
15
16#include <asm/cacheflush.h>
17#include <asm/switch_to.h>
18#include <asm/tlbflush.h>
19#include <asm/timer.h>
20#include <asm/oplib.h>
21#include <asm/sbi.h>
22#include <asm/mmu.h>
23
24#include "kernel.h"
25#include "irq.h"
26
27#define IRQ_CROSS_CALL 15
28
29static volatile int smp_processors_ready;
30static int smp_highest_cpu;
31
32static inline unsigned long sun4d_swap(volatile unsigned long *ptr, unsigned long val)
33{
34 __asm__ __volatile__("swap [%1], %0\n\t" :
35 "=&r" (val), "=&r" (ptr) :
36 "0" (val), "1" (ptr));
37 return val;
38}
39
40static void smp4d_ipi_init(void);
41
42static unsigned char cpu_leds[32];
43
44static inline void show_leds(int cpuid)
45{
46 cpuid &= 0x1e;
47 __asm__ __volatile__ ("stba %0, [%1] %2" : :
48 "r" ((cpu_leds[cpuid] << 4) | cpu_leds[cpuid+1]),
49 "r" (ECSR_BASE(cpuid) | BB_LEDS),
50 "i" (ASI_M_CTL));
51}
52
53void sun4d_cpu_pre_starting(void *arg)
54{
55 int cpuid = hard_smp_processor_id();
56
57 /* Show we are alive */
58 cpu_leds[cpuid] = 0x6;
59 show_leds(cpuid);
60
61 /* Enable level15 interrupt, disable level14 interrupt for now */
62 cc_set_imsk((cc_get_imsk() & ~0x8000) | 0x4000);
63}
64
65void sun4d_cpu_pre_online(void *arg)
66{
67 unsigned long flags;
68 int cpuid;
69
70 cpuid = hard_smp_processor_id();
71
72 /* Unblock the master CPU _only_ when the scheduler state
73 * of all secondary CPUs will be up-to-date, so after
74 * the SMP initialization the master will be just allowed
75 * to call the scheduler code.
76 */
77 sun4d_swap((unsigned long *)&cpu_callin_map[cpuid], 1);
78 local_ops->cache_all();
79 local_ops->tlb_all();
80
81 while ((unsigned long)current_set[cpuid] < PAGE_OFFSET)
82 barrier();
83
84 while (current_set[cpuid]->cpu != cpuid)
85 barrier();
86
87 /* Fix idle thread fields. */
88 __asm__ __volatile__("ld [%0], %%g6\n\t"
89 : : "r" (¤t_set[cpuid])
90 : "memory" /* paranoid */);
91
92 cpu_leds[cpuid] = 0x9;
93 show_leds(cpuid);
94
95 /* Attach to the address space of init_task. */
96 atomic_inc(&init_mm.mm_count);
97 current->active_mm = &init_mm;
98
99 local_ops->cache_all();
100 local_ops->tlb_all();
101
102 while (!cpumask_test_cpu(cpuid, &smp_commenced_mask))
103 barrier();
104
105 spin_lock_irqsave(&sun4d_imsk_lock, flags);
106 cc_set_imsk(cc_get_imsk() & ~0x4000); /* Allow PIL 14 as well */
107 spin_unlock_irqrestore(&sun4d_imsk_lock, flags);
108}
109
110/*
111 * Cycle through the processors asking the PROM to start each one.
112 */
113void __init smp4d_boot_cpus(void)
114{
115 smp4d_ipi_init();
116 if (boot_cpu_id)
117 current_set[0] = NULL;
118 local_ops->cache_all();
119}
120
121int smp4d_boot_one_cpu(int i, struct task_struct *idle)
122{
123 unsigned long *entry = &sun4d_cpu_startup;
124 int timeout;
125 int cpu_node;
126
127 cpu_find_by_instance(i, &cpu_node, NULL);
128 current_set[i] = task_thread_info(idle);
129 /*
130 * Initialize the contexts table
131 * Since the call to prom_startcpu() trashes the structure,
132 * we need to re-initialize it for each cpu
133 */
134 smp_penguin_ctable.which_io = 0;
135 smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
136 smp_penguin_ctable.reg_size = 0;
137
138 /* whirrr, whirrr, whirrrrrrrrr... */
139 printk(KERN_INFO "Starting CPU %d at %p\n", i, entry);
140 local_ops->cache_all();
141 prom_startcpu(cpu_node,
142 &smp_penguin_ctable, 0, (char *)entry);
143
144 printk(KERN_INFO "prom_startcpu returned :)\n");
145
146 /* wheee... it's going... */
147 for (timeout = 0; timeout < 10000; timeout++) {
148 if (cpu_callin_map[i])
149 break;
150 udelay(200);
151 }
152
153 if (!(cpu_callin_map[i])) {
154 printk(KERN_ERR "Processor %d is stuck.\n", i);
155 return -ENODEV;
156
157 }
158 local_ops->cache_all();
159 return 0;
160}
161
162void __init smp4d_smp_done(void)
163{
164 int i, first;
165 int *prev;
166
167 /* setup cpu list for irq rotation */
168 first = 0;
169 prev = &first;
170 for_each_online_cpu(i) {
171 *prev = i;
172 prev = &cpu_data(i).next;
173 }
174 *prev = first;
175 local_ops->cache_all();
176
177 /* Ok, they are spinning and ready to go. */
178 smp_processors_ready = 1;
179 sun4d_distribute_irqs();
180}
181
182/* Memory structure giving interrupt handler information about IPI generated */
183struct sun4d_ipi_work {
184 int single;
185 int msk;
186 int resched;
187};
188
189static DEFINE_PER_CPU_SHARED_ALIGNED(struct sun4d_ipi_work, sun4d_ipi_work);
190
191/* Initialize IPIs on the SUN4D SMP machine */
192static void __init smp4d_ipi_init(void)
193{
194 int cpu;
195 struct sun4d_ipi_work *work;
196
197 printk(KERN_INFO "smp4d: setup IPI at IRQ %d\n", SUN4D_IPI_IRQ);
198
199 for_each_possible_cpu(cpu) {
200 work = &per_cpu(sun4d_ipi_work, cpu);
201 work->single = work->msk = work->resched = 0;
202 }
203}
204
205void sun4d_ipi_interrupt(void)
206{
207 struct sun4d_ipi_work *work = &__get_cpu_var(sun4d_ipi_work);
208
209 if (work->single) {
210 work->single = 0;
211 smp_call_function_single_interrupt();
212 }
213 if (work->msk) {
214 work->msk = 0;
215 smp_call_function_interrupt();
216 }
217 if (work->resched) {
218 work->resched = 0;
219 smp_resched_interrupt();
220 }
221}
222
223/* +-------+-------------+-----------+------------------------------------+
224 * | bcast | devid | sid | levels mask |
225 * +-------+-------------+-----------+------------------------------------+
226 * 31 30 23 22 15 14 0
227 */
228#define IGEN_MESSAGE(bcast, devid, sid, levels) \
229 (((bcast) << 31) | ((devid) << 23) | ((sid) << 15) | (levels))
230
231static void sun4d_send_ipi(int cpu, int level)
232{
233 cc_set_igen(IGEN_MESSAGE(0, cpu << 3, 6 + ((level >> 1) & 7), 1 << (level - 1)));
234}
235
236static void sun4d_ipi_single(int cpu)
237{
238 struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
239
240 /* Mark work */
241 work->single = 1;
242
243 /* Generate IRQ on the CPU */
244 sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
245}
246
247static void sun4d_ipi_mask_one(int cpu)
248{
249 struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
250
251 /* Mark work */
252 work->msk = 1;
253
254 /* Generate IRQ on the CPU */
255 sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
256}
257
258static void sun4d_ipi_resched(int cpu)
259{
260 struct sun4d_ipi_work *work = &per_cpu(sun4d_ipi_work, cpu);
261
262 /* Mark work */
263 work->resched = 1;
264
265 /* Generate IRQ on the CPU (any IRQ will cause resched) */
266 sun4d_send_ipi(cpu, SUN4D_IPI_IRQ);
267}
268
269static struct smp_funcall {
270 smpfunc_t func;
271 unsigned long arg1;
272 unsigned long arg2;
273 unsigned long arg3;
274 unsigned long arg4;
275 unsigned long arg5;
276 unsigned char processors_in[NR_CPUS]; /* Set when ipi entered. */
277 unsigned char processors_out[NR_CPUS]; /* Set when ipi exited. */
278} ccall_info __attribute__((aligned(8)));
279
280static DEFINE_SPINLOCK(cross_call_lock);
281
282/* Cross calls must be serialized, at least currently. */
283static void sun4d_cross_call(smpfunc_t func, cpumask_t mask, unsigned long arg1,
284 unsigned long arg2, unsigned long arg3,
285 unsigned long arg4)
286{
287 if (smp_processors_ready) {
288 register int high = smp_highest_cpu;
289 unsigned long flags;
290
291 spin_lock_irqsave(&cross_call_lock, flags);
292
293 {
294 /*
295 * If you make changes here, make sure
296 * gcc generates proper code...
297 */
298 register smpfunc_t f asm("i0") = func;
299 register unsigned long a1 asm("i1") = arg1;
300 register unsigned long a2 asm("i2") = arg2;
301 register unsigned long a3 asm("i3") = arg3;
302 register unsigned long a4 asm("i4") = arg4;
303 register unsigned long a5 asm("i5") = 0;
304
305 __asm__ __volatile__(
306 "std %0, [%6]\n\t"
307 "std %2, [%6 + 8]\n\t"
308 "std %4, [%6 + 16]\n\t" : :
309 "r"(f), "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5),
310 "r" (&ccall_info.func));
311 }
312
313 /* Init receive/complete mapping, plus fire the IPI's off. */
314 {
315 register int i;
316
317 cpumask_clear_cpu(smp_processor_id(), &mask);
318 cpumask_and(&mask, cpu_online_mask, &mask);
319 for (i = 0; i <= high; i++) {
320 if (cpumask_test_cpu(i, &mask)) {
321 ccall_info.processors_in[i] = 0;
322 ccall_info.processors_out[i] = 0;
323 sun4d_send_ipi(i, IRQ_CROSS_CALL);
324 }
325 }
326 }
327
328 {
329 register int i;
330
331 i = 0;
332 do {
333 if (!cpumask_test_cpu(i, &mask))
334 continue;
335 while (!ccall_info.processors_in[i])
336 barrier();
337 } while (++i <= high);
338
339 i = 0;
340 do {
341 if (!cpumask_test_cpu(i, &mask))
342 continue;
343 while (!ccall_info.processors_out[i])
344 barrier();
345 } while (++i <= high);
346 }
347
348 spin_unlock_irqrestore(&cross_call_lock, flags);
349 }
350}
351
352/* Running cross calls. */
353void smp4d_cross_call_irq(void)
354{
355 int i = hard_smp_processor_id();
356
357 ccall_info.processors_in[i] = 1;
358 ccall_info.func(ccall_info.arg1, ccall_info.arg2, ccall_info.arg3,
359 ccall_info.arg4, ccall_info.arg5);
360 ccall_info.processors_out[i] = 1;
361}
362
363void smp4d_percpu_timer_interrupt(struct pt_regs *regs)
364{
365 struct pt_regs *old_regs;
366 int cpu = hard_smp_processor_id();
367 struct clock_event_device *ce;
368 static int cpu_tick[NR_CPUS];
369 static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd };
370
371 old_regs = set_irq_regs(regs);
372 bw_get_prof_limit(cpu);
373 bw_clear_intr_mask(0, 1); /* INTR_TABLE[0] & 1 is Profile IRQ */
374
375 cpu_tick[cpu]++;
376 if (!(cpu_tick[cpu] & 15)) {
377 if (cpu_tick[cpu] == 0x60)
378 cpu_tick[cpu] = 0;
379 cpu_leds[cpu] = led_mask[cpu_tick[cpu] >> 4];
380 show_leds(cpu);
381 }
382
383 ce = &per_cpu(sparc32_clockevent, cpu);
384
385 irq_enter();
386 ce->event_handler(ce);
387 irq_exit();
388
389 set_irq_regs(old_regs);
390}
391
392static const struct sparc32_ipi_ops sun4d_ipi_ops = {
393 .cross_call = sun4d_cross_call,
394 .resched = sun4d_ipi_resched,
395 .single = sun4d_ipi_single,
396 .mask_one = sun4d_ipi_mask_one,
397};
398
399void __init sun4d_init_smp(void)
400{
401 int i;
402
403 /* Patch ipi15 trap table */
404 t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_sun4d - linux_trap_ipi15_sun4m);
405
406 sparc32_ipi_ops = &sun4d_ipi_ops;
407
408 for (i = 0; i < NR_CPUS; i++) {
409 ccall_info.processors_in[i] = 1;
410 ccall_info.processors_out[i] = 1;
411 }
412}