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 <asm/machdep.h>
11 #include <asm/page.h>
12 #include <asm/firmware.h>
13 #include <asm/kexec.h>
14 #include <asm/mpic.h>
15 #include <asm/smp.h>
16
17 #include "pseries.h"
18 #include "xics.h"
19 #include "plpar_wrappers.h"
20
pseries_kexec_cpu_down(int crash_shutdown,int secondary)21 static void pseries_kexec_cpu_down(int crash_shutdown, int secondary)
22 {
23 /* Don't risk a hypervisor call if we're crashing */
24 if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) {
25 unsigned long addr;
26
27 addr = __pa(get_slb_shadow());
28 if (unregister_slb_shadow(hard_smp_processor_id(), addr))
29 printk("SLB shadow buffer deregistration of "
30 "cpu %u (hw_cpu_id %d) failed\n",
31 smp_processor_id(),
32 hard_smp_processor_id());
33
34 addr = __pa(get_lppaca());
35 if (unregister_vpa(hard_smp_processor_id(), addr)) {
36 printk("VPA deregistration of cpu %u (hw_cpu_id %d) "
37 "failed\n", smp_processor_id(),
38 hard_smp_processor_id());
39 }
40 }
41 }
42
pseries_kexec_cpu_down_mpic(int crash_shutdown,int secondary)43 static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary)
44 {
45 pseries_kexec_cpu_down(crash_shutdown, secondary);
46 mpic_teardown_this_cpu(secondary);
47 }
48
setup_kexec_cpu_down_mpic(void)49 void __init setup_kexec_cpu_down_mpic(void)
50 {
51 ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
52 }
53
pseries_kexec_cpu_down_xics(int crash_shutdown,int secondary)54 static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary)
55 {
56 pseries_kexec_cpu_down(crash_shutdown, secondary);
57 xics_kexec_teardown_cpu(secondary);
58 }
59
setup_kexec_cpu_down_xics(void)60 void __init setup_kexec_cpu_down_xics(void)
61 {
62 ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
63 }
64
pseries_kexec_setup(void)65 static int __init pseries_kexec_setup(void)
66 {
67 ppc_md.machine_kexec = default_machine_kexec;
68 ppc_md.machine_kexec_prepare = default_machine_kexec_prepare;
69 ppc_md.machine_crash_shutdown = default_machine_crash_shutdown;
70
71 return 0;
72 }
73 machine_device_initcall(pseries, pseries_kexec_setup);
74