9e01573b5c
Since commit c0114709ed ("irqchip: gic: Perform the gic_secondary_init()
call via CPU notifier") it is no longer required nor possible to call
gic_secondary_init() from platform code.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/*
|
|
* linux/arch/arm/mach-vexpress/mcpm_platsmp.c
|
|
*
|
|
* Created by: Nicolas Pitre, November 2012
|
|
* Copyright: (C) 2012-2013 Linaro Limited
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Code to handle secondary CPU bringup and hotplug for the cluster power API.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <asm/mcpm.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/smp_plat.h>
|
|
|
|
static void __init simple_smp_init_cpus(void)
|
|
{
|
|
}
|
|
|
|
static int __cpuinit mcpm_boot_secondary(unsigned int cpu, struct task_struct *idle)
|
|
{
|
|
unsigned int mpidr, pcpu, pcluster, ret;
|
|
extern void secondary_startup(void);
|
|
|
|
mpidr = cpu_logical_map(cpu);
|
|
pcpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
|
|
pcluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
|
|
pr_debug("%s: logical CPU %d is physical CPU %d cluster %d\n",
|
|
__func__, cpu, pcpu, pcluster);
|
|
|
|
mcpm_set_entry_vector(pcpu, pcluster, NULL);
|
|
ret = mcpm_cpu_power_up(pcpu, pcluster);
|
|
if (ret)
|
|
return ret;
|
|
mcpm_set_entry_vector(pcpu, pcluster, secondary_startup);
|
|
arch_send_wakeup_ipi_mask(cpumask_of(cpu));
|
|
dsb_sev();
|
|
return 0;
|
|
}
|
|
|
|
static void __cpuinit mcpm_secondary_init(unsigned int cpu)
|
|
{
|
|
mcpm_cpu_powered_up();
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
|
|
static int mcpm_cpu_disable(unsigned int cpu)
|
|
{
|
|
/*
|
|
* We assume all CPUs may be shut down.
|
|
* This would be the hook to use for eventual Secure
|
|
* OS migration requests as described in the PSCI spec.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static void mcpm_cpu_die(unsigned int cpu)
|
|
{
|
|
unsigned int mpidr, pcpu, pcluster;
|
|
mpidr = read_cpuid_mpidr();
|
|
pcpu = MPIDR_AFFINITY_LEVEL(mpidr, 0);
|
|
pcluster = MPIDR_AFFINITY_LEVEL(mpidr, 1);
|
|
mcpm_set_entry_vector(pcpu, pcluster, NULL);
|
|
mcpm_cpu_power_down();
|
|
}
|
|
|
|
#endif
|
|
|
|
static struct smp_operations __initdata mcpm_smp_ops = {
|
|
.smp_init_cpus = simple_smp_init_cpus,
|
|
.smp_boot_secondary = mcpm_boot_secondary,
|
|
.smp_secondary_init = mcpm_secondary_init,
|
|
#ifdef CONFIG_HOTPLUG_CPU
|
|
.cpu_disable = mcpm_cpu_disable,
|
|
.cpu_die = mcpm_cpu_die,
|
|
#endif
|
|
};
|
|
|
|
void __init mcpm_smp_set_ops(void)
|
|
{
|
|
smp_set_ops(&mcpm_smp_ops);
|
|
}
|