1 files changed, 0 insertions, 269 deletions
diff --git a/arch/tile/kernel/smpboot.c b/arch/tile/kernel/smpboot.c
deleted file mode 100644
index 869c22e57561..000000000000
--- a/arch/tile/kernel/smpboot.c
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation, version 2.
- *
- *   This program is distributed in the hope that it will be useful, but
- *   WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- *   NON INFRINGEMENT.  See the GNU General Public License for
- *   more details.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/sched/mm.h>
-#include <linux/sched/task.h>
-#include <linux/kernel_stat.h>
-#include <linux/bootmem.h>
-#include <linux/notifier.h>
-#include <linux/cpu.h>
-#include <linux/percpu.h>
-#include <linux/delay.h>
-#include <linux/err.h>
-#include <linux/irq.h>
-#include <asm/mmu_context.h>
-#include <asm/tlbflush.h>
-#include <asm/sections.h>
-
-/* State of each CPU. */
-static DEFINE_PER_CPU(int, cpu_state) = { 0 };
-
-/* The messaging code jumps to this pointer during boot-up */
-unsigned long start_cpu_function_addr;
-
-/* Called very early during startup to mark boot cpu as online */
-void __init smp_prepare_boot_cpu(void)
-{
-	int cpu = smp_processor_id();
-	set_cpu_online(cpu, 1);
-	set_cpu_present(cpu, 1);
-	__this_cpu_write(cpu_state, CPU_ONLINE);
-
-	init_messaging();
-}
-
-static void start_secondary(void);
-
-/*
- * Called at the top of init() to launch all the other CPUs.
- * They run free to complete their initialization and then wait
- * until they get an IPI from the boot cpu to come online.
- */
-void __init smp_prepare_cpus(unsigned int max_cpus)
-{
-	long rc;
-	int cpu, cpu_count;
-	int boot_cpu = smp_processor_id();
-
-	current_thread_info()->cpu = boot_cpu;
-
-	/*
-	 * Pin this task to the boot CPU while we bring up the others,
-	 * just to make sure we don't uselessly migrate as they come up.
-	 */
-	rc = sched_setaffinity(current->pid, cpumask_of(boot_cpu));
-	if (rc != 0)
-		pr_err("Couldn't set init affinity to boot cpu (%ld)\n", rc);
-
-	/* Print information about disabled and dataplane cpus. */
-	print_disabled_cpus();
-
-	/*
-	 * Tell the messaging subsystem how to respond to the
-	 * startup message.  We use a level of indirection to avoid
-	 * confusing the linker with the fact that the messaging
-	 * subsystem is calling __init code.
-	 */
-	start_cpu_function_addr = (unsigned long) &online_secondary;
-
-	/* Set up thread context for all new processors. */
-	cpu_count = 1;
-	for (cpu = 0; cpu < NR_CPUS; ++cpu)	{
-		struct task_struct *idle;
-
-		if (cpu == boot_cpu)
-			continue;
-
-		if (!cpu_possible(cpu)) {
-			/*
-			 * Make this processor do nothing on boot.
-			 * Note that we don't give the boot_pc function
-			 * a stack, so it has to be assembly code.
-			 */
-			per_cpu(boot_sp, cpu) = 0;
-			per_cpu(boot_pc, cpu) = (unsigned long) smp_nap;
-			continue;
-		}
-
-		/* Create a new idle thread to run start_secondary() */
-		idle = fork_idle(cpu);
-		if (IS_ERR(idle))
-			panic("failed fork for CPU %d", cpu);
-		idle->thread.pc = (unsigned long) start_secondary;
-
-		/* Make this thread the boot thread for this processor */
-		per_cpu(boot_sp, cpu) = task_ksp0(idle);
-		per_cpu(boot_pc, cpu) = idle->thread.pc;
-
-		++cpu_count;
-	}
-	BUG_ON(cpu_count > (max_cpus ? max_cpus : 1));
-
-	/* Fire up the other tiles, if any */
-	init_cpu_present(cpu_possible_mask);
-	if (cpumask_weight(cpu_present_mask) > 1) {
-		mb();  /* make sure all data is visible to new processors */
-		hv_start_all_tiles();
-	}
-}
-
-static __initdata struct cpumask init_affinity;
-
-static __init int reset_init_affinity(void)
-{
-	long rc = sched_setaffinity(current->pid, &init_affinity);
-	if (rc != 0)
-		pr_warn("couldn't reset init affinity (%ld)\n", rc);
-	return 0;
-}
-late_initcall(reset_init_affinity);
-
-static struct cpumask cpu_started;
-
-/*
- * Activate a secondary processor.  Very minimal; don't add anything
- * to this path without knowing what you're doing, since SMP booting
- * is pretty fragile.
- */
-static void start_secondary(void)
-{
-	int cpuid;
-
-	preempt_disable();
-
-	cpuid = smp_processor_id();
-
-	/* Set our thread pointer appropriately. */
-	set_my_cpu_offset(__per_cpu_offset[cpuid]);
-
-	/*
-	 * In large machines even this will slow us down, since we
-	 * will be contending for for the printk spinlock.
-	 */
-	/* printk(KERN_DEBUG "Initializing CPU#%d\n", cpuid); */
-
-	/* Initialize the current asid for our first page table. */
-	__this_cpu_write(current_asid, min_asid);
-
-	/* Set up this thread as another owner of the init_mm */
-	mmgrab(&init_mm);
-	current->active_mm = &init_mm;
-	if (current->mm)
-		BUG();
-	enter_lazy_tlb(&init_mm, current);
-
-	/* Allow hypervisor messages to be received */
-	init_messaging();
-	local_irq_enable();
-
-	/* Indicate that we're ready to come up. */
-	/* Must not do this before we're ready to receive messages */
-	if (cpumask_test_and_set_cpu(cpuid, &cpu_started)) {
-		pr_warn("CPU#%d already started!\n", cpuid);
-		for (;;)
-			local_irq_enable();
-	}
-
-	smp_nap();
-}
-
-/*
- * Bring a secondary processor online.
- */
-void online_secondary(void)
-{
-	/*
-	 * low-memory mappings have been cleared, flush them from
-	 * the local TLBs too.
-	 */
-	local_flush_tlb();
-
-	BUG_ON(in_interrupt());
-
-	/* This must be done before setting cpu_online_mask */
-	wmb();
-
-	notify_cpu_starting(smp_processor_id());
-
-	set_cpu_online(smp_processor_id(), 1);
-	__this_cpu_write(cpu_state, CPU_ONLINE);
-
-	/* Set up tile-specific state for this cpu. */
-	setup_cpu(0);
-
-	/* Set up tile-timer clock-event device on this cpu */
-	setup_tile_timer();
-
-	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
-}
-
-int __cpu_up(unsigned int cpu, struct task_struct *tidle)
-{
-	/* Wait 5s total for all CPUs for them to come online */
-	static int timeout;
-	for (; !cpumask_test_cpu(cpu, &cpu_started); timeout++) {
-		if (timeout >= 50000) {
-			pr_info("skipping unresponsive cpu%d\n", cpu);
-			local_irq_enable();
-			return -EIO;
-		}
-		udelay(100);
-	}
-
-	local_irq_enable();
-	per_cpu(cpu_state, cpu) = CPU_UP_PREPARE;
-
-	/* Unleash the CPU! */
-	send_IPI_single(cpu, MSG_TAG_START_CPU);
-	while (!cpumask_test_cpu(cpu, cpu_online_mask))
-		cpu_relax();
-	return 0;
-}
-
-static void panic_start_cpu(void)
-{
-	panic("Received a MSG_START_CPU IPI after boot finished.");
-}
-
-void __init smp_cpus_done(unsigned int max_cpus)
-{
-	int cpu, next, rc;
-
-	/* Reset the response to a (now illegal) MSG_START_CPU IPI. */
-	start_cpu_function_addr = (unsigned long) &panic_start_cpu;
-
-	cpumask_copy(&init_affinity, cpu_online_mask);
-
-	/*
-	 * Pin ourselves to a single cpu in the initial affinity set
-	 * so that kernel mappings for the rootfs are not in the dataplane,
-	 * if set, and to avoid unnecessary migrating during bringup.
-	 * Use the last cpu just in case the whole chip has been
-	 * isolated from the scheduler, to keep init away from likely
-	 * more useful user code.  This also ensures that work scheduled
-	 * via schedule_delayed_work() in the init routines will land
-	 * on this cpu.
-	 */
-	for (cpu = cpumask_first(&init_affinity);
-	     (next = cpumask_next(cpu, &init_affinity)) < nr_cpu_ids;
-	     cpu = next)
-		;
-	rc = sched_setaffinity(current->pid, cpumask_of(cpu));
-	if (rc != 0)
-		pr_err("Couldn't set init affinity to cpu %d (%d)\n", cpu, rc);
-}