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 } 64