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/*
* 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 <linux/kernel.h>
#include <linux/interrupt.h>
#include <asm/machdep.h>
#include <asm/page.h>
#include <asm/firmware.h>
#include <asm/kexec.h>
#include <asm/mpic.h>
#include <asm/xics.h>
#include <asm/smp.h>
#include "pseries.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;
int ret;
if (get_lppaca()->dtl_enable_mask) {
ret = unregister_dtl(hard_smp_processor_id());
if (ret) {
pr_err("WARNING: DTL deregistration for cpu "
"%d (hw %d) failed with %d\n",
smp_processor_id(),
hard_smp_processor_id(), ret);
}
}
addr = __pa(get_slb_shadow());
ret = unregister_slb_shadow(hard_smp_processor_id(), addr);
if (ret) {
pr_err("WARNING: SLB shadow buffer deregistration "
"for cpu %d (hw %d) failed with %d\n",
smp_processor_id(),
hard_smp_processor_id(), ret);
}
addr = __pa(get_lppaca());
ret = unregister_vpa(hard_smp_processor_id(), addr);
if (ret) {
pr_err("WARNING: VPA deregistration for cpu %d "
"(hw %d) failed with %d\n", smp_processor_id(),
hard_smp_processor_id(), ret);
}
}
}
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;
}
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