Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[linux-2.6.git] / arch / powerpc / platforms / pseries / kexec.c
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
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
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
49 void __init setup_kexec_cpu_down_mpic(void)
50 {
51         ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic;
52 }
53
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
60 void __init setup_kexec_cpu_down_xics(void)
61 {
62         ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics;
63 }