21 #include <linux/cpu.h>
37 /* State of each CPU */
48 static inline void __cpuinit smp_store_cpu_info(unsigned int cpu)  in smp_store_cpu_info()  argument
50 	struct sh_cpuinfo *c = cpu_data + cpu;  in smp_store_cpu_info()
59 	unsigned int cpu = smp_processor_id();  in smp_prepare_cpus()  local
62 	current_thread_info()->cpu = cpu;  in smp_prepare_cpus()
72 	unsigned int cpu = smp_processor_id();  in smp_prepare_boot_cpu()  local
74 	__cpu_number_map[0] = cpu;  in smp_prepare_boot_cpu()
75 	__cpu_logical_map[0] = cpu;  in smp_prepare_boot_cpu()
77 	set_cpu_online(cpu, true);  in smp_prepare_boot_cpu()
78 	set_cpu_possible(cpu, true);  in smp_prepare_boot_cpu()
80 	per_cpu(cpu_state, cpu) = CPU_ONLINE;  in smp_prepare_boot_cpu()
84 void native_cpu_die(unsigned int cpu)  in native_cpu_die()  argument
90 		if (per_cpu(cpu_state, cpu) == CPU_DEAD) {  in native_cpu_die()
92 				pr_info("CPU %u is now offline\n", cpu);  in native_cpu_die()
100 	pr_err("CPU %u didn't die...\n", cpu);  in native_cpu_die()
103 int native_cpu_disable(unsigned int cpu)  in native_cpu_disable()  argument
105 	return cpu == 0 ? -EPERM : 0;  in native_cpu_disable()
125 	unsigned int cpu = smp_processor_id();  in __cpu_disable()  local
129 	ret = mp_ops->cpu_disable(cpu);  in __cpu_disable()
134 	 * Take this CPU offline.  Once we clear this, we can't return,  in __cpu_disable()
135 	 * and we must not schedule until we're ready to give up the cpu.  in __cpu_disable()
137 	set_cpu_online(cpu, false);  in __cpu_disable()
140 	 * OK - migrate IRQs away from this CPU  in __cpu_disable()
145 	 * Stop the local timer for this CPU.  in __cpu_disable()
147 	local_timer_stop(cpu);  in __cpu_disable()
150 	 * Flush user cache and TLB mappings, and then remove this CPU  in __cpu_disable()
159 			cpumask_clear_cpu(cpu, mm_cpumask(p->mm));  in __cpu_disable()
165 int native_cpu_disable(unsigned int cpu)  in native_cpu_disable()  argument
170 void native_cpu_die(unsigned int cpu)  in native_cpu_die()  argument
184 	unsigned int cpu = smp_processor_id();  in start_secondary()  local
198 	notify_cpu_starting(cpu);  in start_secondary()
203 	local_timer_setup(cpu);  in start_secondary()
206 	smp_store_cpu_info(cpu);  in start_secondary()
208 	set_cpu_online(cpu, true);  in start_secondary()
209 	per_cpu(cpu_state, cpu) = CPU_ONLINE;  in start_secondary()
223 int __cpuinit __cpu_up(unsigned int cpu)  in __cpu_up()  argument
228 	tsk = cpu_data[cpu].idle;  in __cpu_up()
230 		tsk = fork_idle(cpu);  in __cpu_up()
232 			pr_err("Failed forking idle task for cpu %d\n", cpu);  in __cpu_up()
236 		cpu_data[cpu].idle = tsk;  in __cpu_up()
239 	per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;  in __cpu_up()
251 	mp_ops->start_cpu(cpu, (unsigned long)_stext);  in __cpu_up()
255 		if (cpu_online(cpu))  in __cpu_up()
262 	if (cpu_online(cpu))  in __cpu_up()
271 	int cpu;  in smp_cpus_done()  local
273 	for_each_online_cpu(cpu)  in smp_cpus_done()
274 		bogosum += cpu_data[cpu].loops_per_jiffy;  in smp_cpus_done()
282 void smp_send_reschedule(int cpu)  in smp_send_reschedule()  argument
284 	mp_ops->send_ipi(cpu, SMP_MSG_RESCHEDULE);  in smp_send_reschedule()
294 	int cpu;  in arch_send_call_function_ipi_mask()  local
296 	for_each_cpu(cpu, mask)  in arch_send_call_function_ipi_mask()
297 		mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION);  in arch_send_call_function_ipi_mask()
300 void arch_send_call_function_single_ipi(int cpu)  in arch_send_call_function_single_ipi()  argument
302 	mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION_SINGLE);  in arch_send_call_function_single_ipi()
307 	int cpu;  in smp_timer_broadcast()  local
309 	for_each_cpu(cpu, mask)  in smp_timer_broadcast()
310 		mp_ops->send_ipi(cpu, SMP_MSG_TIMER);  in smp_timer_broadcast()
366  * address spaces, a new context is obtained on the current cpu, and tlb
371  * mm might be active on another cpu (eg debuggers doing the flushes on