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/*
* Copyright 2011 Calxeda, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/smp.h>
#include <asm/smp_scu.h>
#include <asm/cacheflush.h>
#include "core.h"
extern void secondary_startup(void);
int platform_cpu_kill(unsigned int cpu)
{
return 1;
}
/*
* platform-specific code to shutdown a CPU
*
*/
void platform_cpu_die(unsigned int cpu)
{
flush_cache_all();
highbank_set_cpu_jump(cpu, secondary_startup);
scu_power_mode(scu_base_addr, SCU_PM_POWEROFF);
cpu_do_idle();
/* We should never return from idle */
panic("highbank: cpu %d unexpectedly exit from shutdown\n", cpu);
}
int platform_cpu_disable(unsigned int cpu)
{
/*
* CPU0 should not be shut down via hotplug. cpu_idle can WFI
* or a proper shutdown or hibernate should be used.
*/
return cpu == 0 ? -EPERM : 0;
}
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