1/*
2 *  Copyright 2006 Michael Ellerman, IBM Corporation
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 */
9
10#include <linux/kernel.h>
11#include <linux/interrupt.h>
12
13#include <asm/machdep.h>
14#include <asm/page.h>
15#include <asm/firmware.h>
16#include <asm/kexec.h>
17#include <asm/mpic.h>
18#include <asm/xics.h>
19#include <asm/smp.h>
20#include <asm/plpar_wrappers.h>
21
22#include "pseries.h"
23
24static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
25{
26	/* Don't risk a hypervisor call if we're crashing */
27	if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
28		int ret;
29		int cpu = smp_processor_id();
30		int hwcpu = hard_smp_processor_id();
31
32		if (get_lppaca()->dtl_enable_mask) {
33			ret = unregister_dtl(hwcpu);
34			if (ret) {
35				pr_err("WARNING: DTL deregistration for cpu "
36				       "%d (hw %d) failed with %d\n",
37				       cpu, hwcpu, ret);
38			}
39		}
40
41		ret = unregister_slb_shadow(hwcpu);
42		if (ret) {
43			pr_err("WARNING: SLB shadow buffer deregistration "
44			       "for cpu %d (hw %d) failed with %d\n",
45			       cpu, hwcpu, ret);
46		}
47
48		ret = unregister_vpa(hwcpu);
49		if (ret) {
50			pr_err("WARNING: VPA deregistration for cpu %d "
51			       "(hw %d) failed with %d\n", cpu, hwcpu, ret);
52		}
53	}
54}
55
56static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary)
57{
58	pseries_kexec_cpu_down(crash_shutdown, secondary);
59	mpic_teardown_this_cpu(secondary);
60}
61
62void __init setup_kexec_cpu_down_mpic(void)
63{
64	ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
65}
66
67static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary)
68{
69	pseries_kexec_cpu_down(crash_shutdown, secondary);
70	xics_kexec_teardown_cpu(secondary);
71}
72
73void __init setup_kexec_cpu_down_xics(void)
74{
75	ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
76}
77