Logo Search packages:      
Sourcecode: linux version File versions  Download package

kexec.c

/*
 *  Copyright 2006 Michael Ellerman, IBM Corporation
 *
 * 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; either version
 * 2 of the License, or (at your option) any later version.
 */

#include <asm/machdep.h>
#include <asm/page.h>
#include <asm/firmware.h>
#include <asm/kexec.h>
#include <asm/mpic.h>
#include <asm/smp.h>

#include "pseries.h"
#include "xics.h"
#include "plpar_wrappers.h"

static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
{
      /* Don't risk a hypervisor call if we're crashing */
      if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
            unsigned long addr;

            addr = __pa(get_slb_shadow());
            if (unregister_slb_shadow(hard_smp_processor_id(), addr))
                  printk("SLB shadow buffer deregistration of "
                         "cpu %u (hw_cpu_id %d) failed\n",
                         smp_processor_id(),
                         hard_smp_processor_id());

            addr = __pa(get_lppaca());
            if (unregister_vpa(hard_smp_processor_id(), addr)) {
                  printk("VPA deregistration of cpu %u (hw_cpu_id %d) "
                              "failed\n", smp_processor_id(),
                              hard_smp_processor_id());
            }
      }
}

static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary)
{
      pseries_kexec_cpu_down(crash_shutdown, secondary);
      mpic_teardown_this_cpu(secondary);
}

void __init setup_kexec_cpu_down_mpic(void)
{
      ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
}

static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary)
{
      pseries_kexec_cpu_down(crash_shutdown, secondary);
      xics_kexec_teardown_cpu(secondary);
}

void __init setup_kexec_cpu_down_xics(void)
{
      ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
}

static int __init pseries_kexec_setup(void)
{
      ppc_md.machine_kexec = default_machine_kexec;
      ppc_md.machine_kexec_prepare = default_machine_kexec_prepare;
      ppc_md.machine_crash_shutdown = default_machine_crash_shutdown;

      return 0;
}
machine_device_initcall(pseries, pseries_kexec_setup);

Generated by  Doxygen 1.6.0   Back to index