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); 73