^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * SMP support for Hexagon
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/percpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/sched/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mm_types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/time.h> /* timer_interrupt */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/hexagon_vm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define BASE_IPI_IRQ 26
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * cpu_possible_mask needs to be filled out prior to setup_per_cpu_areas
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * (which is prior to any of our smp_prepare_cpu crap), in order to set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * up the... per_cpu areas.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct ipi_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned long bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static DEFINE_PER_CPU(struct ipi_data, ipi_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static inline void __handle_ipi(unsigned long *ops, struct ipi_data *ipi,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned long msg = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) msg = find_next_bit(ops, BITS_PER_LONG, msg+1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) switch (msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) case IPI_TIMER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) ipi_timer();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) case IPI_CALL_FUNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) generic_smp_call_function_interrupt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) case IPI_CPU_STOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * call vmstop()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) __vmstop();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) case IPI_RESCHEDULE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) scheduler_ipi();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) } while (msg < BITS_PER_LONG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* Used for IPI call from other CPU's to unmask int */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) void smp_vm_unmask_irq(void *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) __vmintop_locen((long) info);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * This is based on Alpha's IPI stuff.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * Supposed to take (int, void*) as args now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * Specifically, first arg is irq, second is the irq_desc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) irqreturn_t handle_ipi(int irq, void *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned long ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) while ((ops = xchg(&ipi->bits, 0)) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) __handle_ipi(&ops, ipi, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) void send_ipi(const struct cpumask *cpumask, enum ipi_message_type msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned long cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) unsigned long retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) local_irq_save(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) for_each_cpu(cpu, cpumask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) struct ipi_data *ipi = &per_cpu(ipi_data, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) set_bit(msg, &ipi->bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /* Possible barrier here */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) retval = __vmintop_post(BASE_IPI_IRQ+cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (retval != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) printk(KERN_ERR "interrupt %ld not configured?\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) BASE_IPI_IRQ+cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) local_irq_restore(flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) void __init smp_prepare_boot_cpu(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * interrupts should already be disabled from the VM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * SP should already be correct; need to set THREADINFO_REG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * to point to current thread info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) void start_secondary(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) unsigned long thread_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) unsigned int cpu, irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /* Calculate thread_info pointer from stack pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) "%0 = SP;\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) : "=r" (thread_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) thread_ptr = thread_ptr & ~(THREAD_SIZE-1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) __asm__ __volatile__(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) QUOTED_THREADINFO_REG " = %0;\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) : "r" (thread_ptr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) /* Set the memory struct */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) mmgrab(&init_mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) current->active_mm = &init_mm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) irq = BASE_IPI_IRQ + cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) if (request_irq(irq, handle_ipi, IRQF_TRIGGER_RISING, "ipi_handler",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) pr_err("Failed to request irq %u (ipi_handler)\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* Register the clock_event dummy */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) setup_percpu_clockdev();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) printk(KERN_INFO "%s cpu %d\n", __func__, current_thread_info()->cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) notify_cpu_starting(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) set_cpu_online(cpu, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) * called once for each present cpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) * apparently starts up the CPU and then
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) * maintains control until "cpu_online(cpu)" is set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) int __cpu_up(unsigned int cpu, struct task_struct *idle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) struct thread_info *thread = (struct thread_info *)idle->stack;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) void *stack_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) thread->cpu = cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) /* Boot to the head. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) stack_start = ((void *) thread) + THREAD_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) __vmstart(start_secondary, stack_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) while (!cpu_online(cpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) barrier();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) void __init smp_cpus_done(unsigned int max_cpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) void __init smp_prepare_cpus(unsigned int max_cpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) int i, irq = BASE_IPI_IRQ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) * should eventually have some sort of machine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * descriptor that has this stuff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* Right now, let's just fake it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) for (i = 0; i < max_cpus; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) set_cpu_present(i, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /* Also need to register the interrupts for IPI */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (max_cpus > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if (request_irq(irq, handle_ipi, IRQF_TRIGGER_RISING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) "ipi_handler", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) pr_err("Failed to request irq %d (ipi_handler)\n", irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) void smp_send_reschedule(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) send_ipi(cpumask_of(cpu), IPI_RESCHEDULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) void smp_send_stop(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) struct cpumask targets;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) cpumask_copy(&targets, cpu_online_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) cpumask_clear_cpu(smp_processor_id(), &targets);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) send_ipi(&targets, IPI_CPU_STOP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) void arch_send_call_function_single_ipi(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) send_ipi(cpumask_of(cpu), IPI_CALL_FUNC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) void arch_send_call_function_ipi_mask(const struct cpumask *mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) send_ipi(mask, IPI_CALL_FUNC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) int setup_profiling_timer(unsigned int multiplier)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) void smp_start_cpus(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) for (i = 0; i < NR_CPUS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) set_cpu_possible(i, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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