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1/*
2 * arch/sh/kernel/smp.c
3 *
4 * SMP support for the SuperH processors.
5 *
6 * Copyright (C) 2002 - 2010 Paul Mundt
7 * Copyright (C) 2006 - 2007 Akio Idehara
8 *
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file "COPYING" in the main directory of this archive
11 * for more details.
12 */
13#include <linux/err.h>
14#include <linux/cache.h>
15#include <linux/cpumask.h>
16#include <linux/delay.h>
17#include <linux/init.h>
18#include <linux/spinlock.h>
19#include <linux/mm.h>
20#include <linux/module.h>
21#include <linux/cpu.h>
22#include <linux/interrupt.h>
23#include <linux/sched.h>
24#include <linux/atomic.h>
25#include <asm/processor.h>
26#include <asm/mmu_context.h>
27#include <asm/smp.h>
28#include <asm/cacheflush.h>
29#include <asm/sections.h>
30#include <asm/setup.h>
31
32int __cpu_number_map[NR_CPUS]; /* Map physical to logical */
33int __cpu_logical_map[NR_CPUS]; /* Map logical to physical */
34
35struct plat_smp_ops *mp_ops = NULL;
36
37/* State of each CPU */
38DEFINE_PER_CPU(int, cpu_state) = { 0 };
39
40void __cpuinit register_smp_ops(struct plat_smp_ops *ops)
41{
42 if (mp_ops)
43 printk(KERN_WARNING "Overriding previously set SMP ops\n");
44
45 mp_ops = ops;
46}
47
48static inline void __cpuinit smp_store_cpu_info(unsigned int cpu)
49{
50 struct sh_cpuinfo *c = cpu_data + cpu;
51
52 memcpy(c, &boot_cpu_data, sizeof(struct sh_cpuinfo));
53
54 c->loops_per_jiffy = loops_per_jiffy;
55}
56
57void __init smp_prepare_cpus(unsigned int max_cpus)
58{
59 unsigned int cpu = smp_processor_id();
60
61 init_new_context(current, &init_mm);
62 current_thread_info()->cpu = cpu;
63 mp_ops->prepare_cpus(max_cpus);
64
65#ifndef CONFIG_HOTPLUG_CPU
66 init_cpu_present(cpu_possible_mask);
67#endif
68}
69
70void __init smp_prepare_boot_cpu(void)
71{
72 unsigned int cpu = smp_processor_id();
73
74 __cpu_number_map[0] = cpu;
75 __cpu_logical_map[0] = cpu;
76
77 set_cpu_online(cpu, true);
78 set_cpu_possible(cpu, true);
79
80 per_cpu(cpu_state, cpu) = CPU_ONLINE;
81}
82
83#ifdef CONFIG_HOTPLUG_CPU
84void native_cpu_die(unsigned int cpu)
85{
86 unsigned int i;
87
88 for (i = 0; i < 10; i++) {
89 smp_rmb();
90 if (per_cpu(cpu_state, cpu) == CPU_DEAD) {
91 if (system_state == SYSTEM_RUNNING)
92 pr_info("CPU %u is now offline\n", cpu);
93
94 return;
95 }
96
97 msleep(100);
98 }
99
100 pr_err("CPU %u didn't die...\n", cpu);
101}
102
103int native_cpu_disable(unsigned int cpu)
104{
105 return cpu == 0 ? -EPERM : 0;
106}
107
108void play_dead_common(void)
109{
110 idle_task_exit();
111 irq_ctx_exit(raw_smp_processor_id());
112 mb();
113
114 __get_cpu_var(cpu_state) = CPU_DEAD;
115 local_irq_disable();
116}
117
118void native_play_dead(void)
119{
120 play_dead_common();
121}
122
123int __cpu_disable(void)
124{
125 unsigned int cpu = smp_processor_id();
126 int ret;
127
128 ret = mp_ops->cpu_disable(cpu);
129 if (ret)
130 return ret;
131
132 /*
133 * Take this CPU offline. Once we clear this, we can't return,
134 * and we must not schedule until we're ready to give up the cpu.
135 */
136 set_cpu_online(cpu, false);
137
138 /*
139 * OK - migrate IRQs away from this CPU
140 */
141 migrate_irqs();
142
143 /*
144 * Stop the local timer for this CPU.
145 */
146 local_timer_stop(cpu);
147
148 /*
149 * Flush user cache and TLB mappings, and then remove this CPU
150 * from the vm mask set of all processes.
151 */
152 flush_cache_all();
153 local_flush_tlb_all();
154
155 clear_tasks_mm_cpumask(cpu);
156
157 return 0;
158}
159#else /* ... !CONFIG_HOTPLUG_CPU */
160int native_cpu_disable(unsigned int cpu)
161{
162 return -ENOSYS;
163}
164
165void native_cpu_die(unsigned int cpu)
166{
167 /* We said "no" in __cpu_disable */
168 BUG();
169}
170
171void native_play_dead(void)
172{
173 BUG();
174}
175#endif
176
177asmlinkage void __cpuinit start_secondary(void)
178{
179 unsigned int cpu = smp_processor_id();
180 struct mm_struct *mm = &init_mm;
181
182 enable_mmu();
183 atomic_inc(&mm->mm_count);
184 atomic_inc(&mm->mm_users);
185 current->active_mm = mm;
186 enter_lazy_tlb(mm, current);
187 local_flush_tlb_all();
188
189 per_cpu_trap_init();
190
191 preempt_disable();
192
193 notify_cpu_starting(cpu);
194
195 local_irq_enable();
196
197 /* Enable local timers */
198 local_timer_setup(cpu);
199 calibrate_delay();
200
201 smp_store_cpu_info(cpu);
202
203 set_cpu_online(cpu, true);
204 per_cpu(cpu_state, cpu) = CPU_ONLINE;
205
206 cpu_idle();
207}
208
209extern struct {
210 unsigned long sp;
211 unsigned long bss_start;
212 unsigned long bss_end;
213 void *start_kernel_fn;
214 void *cpu_init_fn;
215 void *thread_info;
216} stack_start;
217
218int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tsk)
219{
220 unsigned long timeout;
221
222 per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
223
224 /* Fill in data in head.S for secondary cpus */
225 stack_start.sp = tsk->thread.sp;
226 stack_start.thread_info = tsk->stack;
227 stack_start.bss_start = 0; /* don't clear bss for secondary cpus */
228 stack_start.start_kernel_fn = start_secondary;
229
230 flush_icache_range((unsigned long)&stack_start,
231 (unsigned long)&stack_start + sizeof(stack_start));
232 wmb();
233
234 mp_ops->start_cpu(cpu, (unsigned long)_stext);
235
236 timeout = jiffies + HZ;
237 while (time_before(jiffies, timeout)) {
238 if (cpu_online(cpu))
239 break;
240
241 udelay(10);
242 barrier();
243 }
244
245 if (cpu_online(cpu))
246 return 0;
247
248 return -ENOENT;
249}
250
251void __init smp_cpus_done(unsigned int max_cpus)
252{
253 unsigned long bogosum = 0;
254 int cpu;
255
256 for_each_online_cpu(cpu)
257 bogosum += cpu_data[cpu].loops_per_jiffy;
258
259 printk(KERN_INFO "SMP: Total of %d processors activated "
260 "(%lu.%02lu BogoMIPS).\n", num_online_cpus(),
261 bogosum / (500000/HZ),
262 (bogosum / (5000/HZ)) % 100);
263}
264
265void smp_send_reschedule(int cpu)
266{
267 mp_ops->send_ipi(cpu, SMP_MSG_RESCHEDULE);
268}
269
270void smp_send_stop(void)
271{
272 smp_call_function(stop_this_cpu, 0, 0);
273}
274
275void arch_send_call_function_ipi_mask(const struct cpumask *mask)
276{
277 int cpu;
278
279 for_each_cpu(cpu, mask)
280 mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION);
281}
282
283void arch_send_call_function_single_ipi(int cpu)
284{
285 mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION_SINGLE);
286}
287
288void smp_timer_broadcast(const struct cpumask *mask)
289{
290 int cpu;
291
292 for_each_cpu(cpu, mask)
293 mp_ops->send_ipi(cpu, SMP_MSG_TIMER);
294}
295
296static void ipi_timer(void)
297{
298 irq_enter();
299 local_timer_interrupt();
300 irq_exit();
301}
302
303void smp_message_recv(unsigned int msg)
304{
305 switch (msg) {
306 case SMP_MSG_FUNCTION:
307 generic_smp_call_function_interrupt();
308 break;
309 case SMP_MSG_RESCHEDULE:
310 scheduler_ipi();
311 break;
312 case SMP_MSG_FUNCTION_SINGLE:
313 generic_smp_call_function_single_interrupt();
314 break;
315 case SMP_MSG_TIMER:
316 ipi_timer();
317 break;
318 default:
319 printk(KERN_WARNING "SMP %d: %s(): unknown IPI %d\n",
320 smp_processor_id(), __func__, msg);
321 break;
322 }
323}
324
325/* Not really SMP stuff ... */
326int setup_profiling_timer(unsigned int multiplier)
327{
328 return 0;
329}
330
331static void flush_tlb_all_ipi(void *info)
332{
333 local_flush_tlb_all();
334}
335
336void flush_tlb_all(void)
337{
338 on_each_cpu(flush_tlb_all_ipi, 0, 1);
339}
340
341static void flush_tlb_mm_ipi(void *mm)
342{
343 local_flush_tlb_mm((struct mm_struct *)mm);
344}
345
346/*
347 * The following tlb flush calls are invoked when old translations are
348 * being torn down, or pte attributes are changing. For single threaded
349 * address spaces, a new context is obtained on the current cpu, and tlb
350 * context on other cpus are invalidated to force a new context allocation
351 * at switch_mm time, should the mm ever be used on other cpus. For
352 * multithreaded address spaces, intercpu interrupts have to be sent.
353 * Another case where intercpu interrupts are required is when the target
354 * mm might be active on another cpu (eg debuggers doing the flushes on
355 * behalf of debugees, kswapd stealing pages from another process etc).
356 * Kanoj 07/00.
357 */
358void flush_tlb_mm(struct mm_struct *mm)
359{
360 preempt_disable();
361
362 if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
363 smp_call_function(flush_tlb_mm_ipi, (void *)mm, 1);
364 } else {
365 int i;
366 for (i = 0; i < num_online_cpus(); i++)
367 if (smp_processor_id() != i)
368 cpu_context(i, mm) = 0;
369 }
370 local_flush_tlb_mm(mm);
371
372 preempt_enable();
373}
374
375struct flush_tlb_data {
376 struct vm_area_struct *vma;
377 unsigned long addr1;
378 unsigned long addr2;
379};
380
381static void flush_tlb_range_ipi(void *info)
382{
383 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
384
385 local_flush_tlb_range(fd->vma, fd->addr1, fd->addr2);
386}
387
388void flush_tlb_range(struct vm_area_struct *vma,
389 unsigned long start, unsigned long end)
390{
391 struct mm_struct *mm = vma->vm_mm;
392
393 preempt_disable();
394 if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
395 struct flush_tlb_data fd;
396
397 fd.vma = vma;
398 fd.addr1 = start;
399 fd.addr2 = end;
400 smp_call_function(flush_tlb_range_ipi, (void *)&fd, 1);
401 } else {
402 int i;
403 for (i = 0; i < num_online_cpus(); i++)
404 if (smp_processor_id() != i)
405 cpu_context(i, mm) = 0;
406 }
407 local_flush_tlb_range(vma, start, end);
408 preempt_enable();
409}
410
411static void flush_tlb_kernel_range_ipi(void *info)
412{
413 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
414
415 local_flush_tlb_kernel_range(fd->addr1, fd->addr2);
416}
417
418void flush_tlb_kernel_range(unsigned long start, unsigned long end)
419{
420 struct flush_tlb_data fd;
421
422 fd.addr1 = start;
423 fd.addr2 = end;
424 on_each_cpu(flush_tlb_kernel_range_ipi, (void *)&fd, 1);
425}
426
427static void flush_tlb_page_ipi(void *info)
428{
429 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
430
431 local_flush_tlb_page(fd->vma, fd->addr1);
432}
433
434void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
435{
436 preempt_disable();
437 if ((atomic_read(&vma->vm_mm->mm_users) != 1) ||
438 (current->mm != vma->vm_mm)) {
439 struct flush_tlb_data fd;
440
441 fd.vma = vma;
442 fd.addr1 = page;
443 smp_call_function(flush_tlb_page_ipi, (void *)&fd, 1);
444 } else {
445 int i;
446 for (i = 0; i < num_online_cpus(); i++)
447 if (smp_processor_id() != i)
448 cpu_context(i, vma->vm_mm) = 0;
449 }
450 local_flush_tlb_page(vma, page);
451 preempt_enable();
452}
453
454static void flush_tlb_one_ipi(void *info)
455{
456 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
457 local_flush_tlb_one(fd->addr1, fd->addr2);
458}
459
460void flush_tlb_one(unsigned long asid, unsigned long vaddr)
461{
462 struct flush_tlb_data fd;
463
464 fd.addr1 = asid;
465 fd.addr2 = vaddr;
466
467 smp_call_function(flush_tlb_one_ipi, (void *)&fd, 1);
468 local_flush_tlb_one(asid, vaddr);
469}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * arch/sh/kernel/smp.c
4 *
5 * SMP support for the SuperH processors.
6 *
7 * Copyright (C) 2002 - 2010 Paul Mundt
8 * Copyright (C) 2006 - 2007 Akio Idehara
9 */
10#include <linux/err.h>
11#include <linux/cache.h>
12#include <linux/cpumask.h>
13#include <linux/delay.h>
14#include <linux/init.h>
15#include <linux/spinlock.h>
16#include <linux/mm.h>
17#include <linux/module.h>
18#include <linux/cpu.h>
19#include <linux/interrupt.h>
20#include <linux/sched/mm.h>
21#include <linux/sched/hotplug.h>
22#include <linux/atomic.h>
23#include <linux/clockchips.h>
24#include <asm/processor.h>
25#include <asm/mmu_context.h>
26#include <asm/smp.h>
27#include <asm/cacheflush.h>
28#include <asm/sections.h>
29#include <asm/setup.h>
30
31int __cpu_number_map[NR_CPUS]; /* Map physical to logical */
32int __cpu_logical_map[NR_CPUS]; /* Map logical to physical */
33
34struct plat_smp_ops *mp_ops = NULL;
35
36/* State of each CPU */
37DEFINE_PER_CPU(int, cpu_state) = { 0 };
38
39void register_smp_ops(struct plat_smp_ops *ops)
40{
41 if (mp_ops)
42 printk(KERN_WARNING "Overriding previously set SMP ops\n");
43
44 mp_ops = ops;
45}
46
47static inline void smp_store_cpu_info(unsigned int cpu)
48{
49 struct sh_cpuinfo *c = cpu_data + cpu;
50
51 memcpy(c, &boot_cpu_data, sizeof(struct sh_cpuinfo));
52
53 c->loops_per_jiffy = loops_per_jiffy;
54}
55
56void __init smp_prepare_cpus(unsigned int max_cpus)
57{
58 unsigned int cpu = smp_processor_id();
59
60 init_new_context(current, &init_mm);
61 current_thread_info()->cpu = cpu;
62 mp_ops->prepare_cpus(max_cpus);
63
64#ifndef CONFIG_HOTPLUG_CPU
65 init_cpu_present(cpu_possible_mask);
66#endif
67}
68
69void __init smp_prepare_boot_cpu(void)
70{
71 unsigned int cpu = smp_processor_id();
72
73 __cpu_number_map[0] = cpu;
74 __cpu_logical_map[0] = cpu;
75
76 set_cpu_online(cpu, true);
77 set_cpu_possible(cpu, true);
78
79 per_cpu(cpu_state, cpu) = CPU_ONLINE;
80}
81
82#ifdef CONFIG_HOTPLUG_CPU
83void native_cpu_die(unsigned int cpu)
84{
85 unsigned int i;
86
87 for (i = 0; i < 10; i++) {
88 smp_rmb();
89 if (per_cpu(cpu_state, cpu) == CPU_DEAD) {
90 if (system_state == SYSTEM_RUNNING)
91 pr_info("CPU %u is now offline\n", cpu);
92
93 return;
94 }
95
96 msleep(100);
97 }
98
99 pr_err("CPU %u didn't die...\n", cpu);
100}
101
102int native_cpu_disable(unsigned int cpu)
103{
104 return cpu == 0 ? -EPERM : 0;
105}
106
107void play_dead_common(void)
108{
109 idle_task_exit();
110 irq_ctx_exit(raw_smp_processor_id());
111 mb();
112
113 __this_cpu_write(cpu_state, CPU_DEAD);
114 local_irq_disable();
115}
116
117void native_play_dead(void)
118{
119 play_dead_common();
120}
121
122int __cpu_disable(void)
123{
124 unsigned int cpu = smp_processor_id();
125 int ret;
126
127 ret = mp_ops->cpu_disable(cpu);
128 if (ret)
129 return ret;
130
131 /*
132 * Take this CPU offline. Once we clear this, we can't return,
133 * and we must not schedule until we're ready to give up the cpu.
134 */
135 set_cpu_online(cpu, false);
136
137 /*
138 * OK - migrate IRQs away from this CPU
139 */
140 migrate_irqs();
141
142 /*
143 * Flush user cache and TLB mappings, and then remove this CPU
144 * from the vm mask set of all processes.
145 */
146 flush_cache_all();
147#ifdef CONFIG_MMU
148 local_flush_tlb_all();
149#endif
150
151 clear_tasks_mm_cpumask(cpu);
152
153 return 0;
154}
155#else /* ... !CONFIG_HOTPLUG_CPU */
156int native_cpu_disable(unsigned int cpu)
157{
158 return -ENOSYS;
159}
160
161void native_cpu_die(unsigned int cpu)
162{
163 /* We said "no" in __cpu_disable */
164 BUG();
165}
166
167void native_play_dead(void)
168{
169 BUG();
170}
171#endif
172
173asmlinkage void start_secondary(void)
174{
175 unsigned int cpu = smp_processor_id();
176 struct mm_struct *mm = &init_mm;
177
178 enable_mmu();
179 mmgrab(mm);
180 mmget(mm);
181 current->active_mm = mm;
182#ifdef CONFIG_MMU
183 enter_lazy_tlb(mm, current);
184 local_flush_tlb_all();
185#endif
186
187 per_cpu_trap_init();
188
189 notify_cpu_starting(cpu);
190
191 local_irq_enable();
192
193 calibrate_delay();
194
195 smp_store_cpu_info(cpu);
196
197 set_cpu_online(cpu, true);
198 per_cpu(cpu_state, cpu) = CPU_ONLINE;
199
200 cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
201}
202
203extern struct {
204 unsigned long sp;
205 unsigned long bss_start;
206 unsigned long bss_end;
207 void *start_kernel_fn;
208 void *cpu_init_fn;
209 void *thread_info;
210} stack_start;
211
212int __cpu_up(unsigned int cpu, struct task_struct *tsk)
213{
214 unsigned long timeout;
215
216 per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
217
218 /* Fill in data in head.S for secondary cpus */
219 stack_start.sp = tsk->thread.sp;
220 stack_start.thread_info = tsk->stack;
221 stack_start.bss_start = 0; /* don't clear bss for secondary cpus */
222 stack_start.start_kernel_fn = start_secondary;
223
224 flush_icache_range((unsigned long)&stack_start,
225 (unsigned long)&stack_start + sizeof(stack_start));
226 wmb();
227
228 mp_ops->start_cpu(cpu, (unsigned long)_stext);
229
230 timeout = jiffies + HZ;
231 while (time_before(jiffies, timeout)) {
232 if (cpu_online(cpu))
233 break;
234
235 udelay(10);
236 barrier();
237 }
238
239 if (cpu_online(cpu))
240 return 0;
241
242 return -ENOENT;
243}
244
245void __init smp_cpus_done(unsigned int max_cpus)
246{
247 unsigned long bogosum = 0;
248 int cpu;
249
250 for_each_online_cpu(cpu)
251 bogosum += cpu_data[cpu].loops_per_jiffy;
252
253 printk(KERN_INFO "SMP: Total of %d processors activated "
254 "(%lu.%02lu BogoMIPS).\n", num_online_cpus(),
255 bogosum / (500000/HZ),
256 (bogosum / (5000/HZ)) % 100);
257}
258
259void arch_smp_send_reschedule(int cpu)
260{
261 mp_ops->send_ipi(cpu, SMP_MSG_RESCHEDULE);
262}
263
264void smp_send_stop(void)
265{
266 smp_call_function(stop_this_cpu, 0, 0);
267}
268
269void arch_send_call_function_ipi_mask(const struct cpumask *mask)
270{
271 int cpu;
272
273 for_each_cpu(cpu, mask)
274 mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION);
275}
276
277void arch_send_call_function_single_ipi(int cpu)
278{
279 mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION_SINGLE);
280}
281
282#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
283void tick_broadcast(const struct cpumask *mask)
284{
285 int cpu;
286
287 for_each_cpu(cpu, mask)
288 mp_ops->send_ipi(cpu, SMP_MSG_TIMER);
289}
290
291static void ipi_timer(void)
292{
293 irq_enter();
294 tick_receive_broadcast();
295 irq_exit();
296}
297#endif
298
299void smp_message_recv(unsigned int msg)
300{
301 switch (msg) {
302 case SMP_MSG_FUNCTION:
303 generic_smp_call_function_interrupt();
304 break;
305 case SMP_MSG_RESCHEDULE:
306 scheduler_ipi();
307 break;
308 case SMP_MSG_FUNCTION_SINGLE:
309 generic_smp_call_function_single_interrupt();
310 break;
311#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
312 case SMP_MSG_TIMER:
313 ipi_timer();
314 break;
315#endif
316 default:
317 printk(KERN_WARNING "SMP %d: %s(): unknown IPI %d\n",
318 smp_processor_id(), __func__, msg);
319 break;
320 }
321}
322
323/* Not really SMP stuff ... */
324int setup_profiling_timer(unsigned int multiplier)
325{
326 return 0;
327}
328
329#ifdef CONFIG_MMU
330
331static void flush_tlb_all_ipi(void *info)
332{
333 local_flush_tlb_all();
334}
335
336void flush_tlb_all(void)
337{
338 on_each_cpu(flush_tlb_all_ipi, 0, 1);
339}
340
341static void flush_tlb_mm_ipi(void *mm)
342{
343 local_flush_tlb_mm((struct mm_struct *)mm);
344}
345
346/*
347 * The following tlb flush calls are invoked when old translations are
348 * being torn down, or pte attributes are changing. For single threaded
349 * address spaces, a new context is obtained on the current cpu, and tlb
350 * context on other cpus are invalidated to force a new context allocation
351 * at switch_mm time, should the mm ever be used on other cpus. For
352 * multithreaded address spaces, intercpu interrupts have to be sent.
353 * Another case where intercpu interrupts are required is when the target
354 * mm might be active on another cpu (eg debuggers doing the flushes on
355 * behalf of debugees, kswapd stealing pages from another process etc).
356 * Kanoj 07/00.
357 */
358void flush_tlb_mm(struct mm_struct *mm)
359{
360 preempt_disable();
361
362 if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
363 smp_call_function(flush_tlb_mm_ipi, (void *)mm, 1);
364 } else {
365 int i;
366 for_each_online_cpu(i)
367 if (smp_processor_id() != i)
368 cpu_context(i, mm) = 0;
369 }
370 local_flush_tlb_mm(mm);
371
372 preempt_enable();
373}
374
375struct flush_tlb_data {
376 struct vm_area_struct *vma;
377 unsigned long addr1;
378 unsigned long addr2;
379};
380
381static void flush_tlb_range_ipi(void *info)
382{
383 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
384
385 local_flush_tlb_range(fd->vma, fd->addr1, fd->addr2);
386}
387
388void flush_tlb_range(struct vm_area_struct *vma,
389 unsigned long start, unsigned long end)
390{
391 struct mm_struct *mm = vma->vm_mm;
392
393 preempt_disable();
394 if ((atomic_read(&mm->mm_users) != 1) || (current->mm != mm)) {
395 struct flush_tlb_data fd;
396
397 fd.vma = vma;
398 fd.addr1 = start;
399 fd.addr2 = end;
400 smp_call_function(flush_tlb_range_ipi, (void *)&fd, 1);
401 } else {
402 int i;
403 for_each_online_cpu(i)
404 if (smp_processor_id() != i)
405 cpu_context(i, mm) = 0;
406 }
407 local_flush_tlb_range(vma, start, end);
408 preempt_enable();
409}
410
411static void flush_tlb_kernel_range_ipi(void *info)
412{
413 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
414
415 local_flush_tlb_kernel_range(fd->addr1, fd->addr2);
416}
417
418void flush_tlb_kernel_range(unsigned long start, unsigned long end)
419{
420 struct flush_tlb_data fd;
421
422 fd.addr1 = start;
423 fd.addr2 = end;
424 on_each_cpu(flush_tlb_kernel_range_ipi, (void *)&fd, 1);
425}
426
427static void flush_tlb_page_ipi(void *info)
428{
429 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
430
431 local_flush_tlb_page(fd->vma, fd->addr1);
432}
433
434void flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
435{
436 preempt_disable();
437 if ((atomic_read(&vma->vm_mm->mm_users) != 1) ||
438 (current->mm != vma->vm_mm)) {
439 struct flush_tlb_data fd;
440
441 fd.vma = vma;
442 fd.addr1 = page;
443 smp_call_function(flush_tlb_page_ipi, (void *)&fd, 1);
444 } else {
445 int i;
446 for_each_online_cpu(i)
447 if (smp_processor_id() != i)
448 cpu_context(i, vma->vm_mm) = 0;
449 }
450 local_flush_tlb_page(vma, page);
451 preempt_enable();
452}
453
454static void flush_tlb_one_ipi(void *info)
455{
456 struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
457 local_flush_tlb_one(fd->addr1, fd->addr2);
458}
459
460void flush_tlb_one(unsigned long asid, unsigned long vaddr)
461{
462 struct flush_tlb_data fd;
463
464 fd.addr1 = asid;
465 fd.addr2 = vaddr;
466
467 smp_call_function(flush_tlb_one_ipi, (void *)&fd, 1);
468 local_flush_tlb_one(asid, vaddr);
469}
470
471#endif