| Michael Ellerman | dce623e | 2007-02-08 18:33:55 +1100 | [diff] [blame^] | 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 | |
| 16 | #include "pseries.h" |
| 17 | #include "xics.h" |
| 18 | #include "plpar_wrappers.h" |
| 19 | |
| 20 | static void pseries_kexec_cpu_down(int crash_shutdown, int secondary) |
| 21 | { |
| 22 | /* Don't risk a hypervisor call if we're crashing */ |
| 23 | if (firmware_has_feature(FW_FEATURE_SPLPAR) && !crash_shutdown) { |
| 24 | unsigned long addr; |
| 25 | |
| 26 | addr = __pa(get_slb_shadow()); |
| 27 | if (unregister_slb_shadow(hard_smp_processor_id(), addr)) |
| 28 | printk("SLB shadow buffer deregistration of " |
| 29 | "cpu %u (hw_cpu_id %d) failed\n", |
| 30 | smp_processor_id(), |
| 31 | hard_smp_processor_id()); |
| 32 | |
| 33 | addr = __pa(get_lppaca()); |
| 34 | if (unregister_vpa(hard_smp_processor_id(), addr)) { |
| 35 | printk("VPA deregistration of cpu %u (hw_cpu_id %d) " |
| 36 | "failed\n", smp_processor_id(), |
| 37 | hard_smp_processor_id()); |
| 38 | } |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | static void pseries_kexec_cpu_down_mpic(int crash_shutdown, int secondary) |
| 43 | { |
| 44 | pseries_kexec_cpu_down(crash_shutdown, secondary); |
| 45 | mpic_teardown_this_cpu(secondary); |
| 46 | } |
| 47 | |
| 48 | void __init setup_kexec_cpu_down_mpic(void) |
| 49 | { |
| 50 | ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_mpic; |
| 51 | } |
| 52 | |
| 53 | static void pseries_kexec_cpu_down_xics(int crash_shutdown, int secondary) |
| 54 | { |
| 55 | pseries_kexec_cpu_down(crash_shutdown, secondary); |
| 56 | xics_teardown_cpu(secondary); |
| 57 | } |
| 58 | |
| 59 | void __init setup_kexec_cpu_down_xics(void) |
| 60 | { |
| 61 | ppc_md.kexec_cpu_down = pseries_kexec_cpu_down_xics; |
| 62 | } |
| 63 | |
| 64 | static int __init pseries_kexec_setup(void) |
| 65 | { |
| 66 | ppc_md.machine_kexec = default_machine_kexec; |
| 67 | ppc_md.machine_kexec_prepare = default_machine_kexec_prepare; |
| 68 | ppc_md.machine_crash_shutdown = default_machine_crash_shutdown; |
| 69 | |
| 70 | return 0; |
| 71 | } |
| 72 | __initcall(pseries_kexec_setup); |