/*
   * 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
  ", 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;
  }