1 /* 2 * smp.h: PowerPC-specific SMP code. 3 * 4 * Original was a copy of sparc smp.h. Now heavily modified 5 * for PPC. 6 * 7 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) 8 * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 */ 15 16 #ifndef _ASM_POWERPC_SMP_H 17 #define _ASM_POWERPC_SMP_H 18 #ifdef __KERNEL__ 19 20 #include <linux/threads.h> 21 #include <linux/cpumask.h> 22 #include <linux/kernel.h> 23 24 #ifndef __ASSEMBLY__ 25 26 #ifdef CONFIG_PPC64 27 #include <asm/paca.h> 28 #endif 29 #include <asm/percpu.h> 30 31 extern int boot_cpuid; 32 33 extern void cpu_die(void); 34 35 #ifdef CONFIG_SMP 36 37 extern void smp_send_debugger_break(int cpu); 38 extern void smp_message_recv(int); 39 extern void start_secondary_resume(void); 40 41 DECLARE_PER_CPU(unsigned int, cpu_pvr); 42 43 #ifdef CONFIG_HOTPLUG_CPU 44 extern void migrate_irqs(void); 45 int generic_cpu_disable(void); 46 void generic_cpu_die(unsigned int cpu); 47 void generic_mach_cpu_die(void); 48 void generic_set_cpu_dead(unsigned int cpu); 49 #endif 50 51 #ifdef CONFIG_PPC64 52 #define raw_smp_processor_id() (local_paca->paca_index) 53 #define hard_smp_processor_id() (get_paca()->hw_cpu_id) 54 #else 55 /* 32-bit */ 56 extern int smp_hw_index[]; 57 58 #define raw_smp_processor_id() (current_thread_info()->cpu) 59 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()]) 60 61 static inline int get_hard_smp_processor_id(int cpu) 62 { 63 return smp_hw_index[cpu]; 64 } 65 66 static inline void set_hard_smp_processor_id(int cpu, int phys) 67 { 68 smp_hw_index[cpu] = phys; 69 } 70 #endif 71 72 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); 73 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); 74 75 static inline struct cpumask *cpu_sibling_mask(int cpu) 76 { 77 return per_cpu(cpu_sibling_map, cpu); 78 } 79 80 static inline struct cpumask *cpu_core_mask(int cpu) 81 { 82 return per_cpu(cpu_core_map, cpu); 83 } 84 85 extern int cpu_to_core_id(int cpu); 86 87 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. 88 * 89 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up 90 * in /proc/interrupts will be wrong!!! --Troy */ 91 #define PPC_MSG_CALL_FUNCTION 0 92 #define PPC_MSG_RESCHEDULE 1 93 #define PPC_MSG_CALL_FUNC_SINGLE 2 94 #define PPC_MSG_DEBUGGER_BREAK 3 95 96 /* 97 * irq controllers that have dedicated ipis per message and don't 98 * need additional code in the action handler may use this 99 */ 100 extern int smp_request_message_ipi(int virq, int message); 101 extern const char *smp_ipi_name[]; 102 103 void smp_init_iSeries(void); 104 void smp_init_pSeries(void); 105 void smp_init_cell(void); 106 void smp_init_celleb(void); 107 void smp_setup_cpu_maps(void); 108 109 extern int __cpu_disable(void); 110 extern void __cpu_die(unsigned int cpu); 111 112 #else 113 /* for UP */ 114 #define hard_smp_processor_id() get_hard_smp_processor_id(0) 115 #define smp_setup_cpu_maps() 116 117 #endif /* CONFIG_SMP */ 118 119 #ifdef CONFIG_PPC64 120 static inline int get_hard_smp_processor_id(int cpu) 121 { 122 return paca[cpu].hw_cpu_id; 123 } 124 125 static inline void set_hard_smp_processor_id(int cpu, int phys) 126 { 127 paca[cpu].hw_cpu_id = phys; 128 } 129 130 extern void smp_release_cpus(void); 131 132 #else 133 /* 32-bit */ 134 #ifndef CONFIG_SMP 135 extern int boot_cpuid_phys; 136 static inline int get_hard_smp_processor_id(int cpu) 137 { 138 return boot_cpuid_phys; 139 } 140 141 static inline void set_hard_smp_processor_id(int cpu, int phys) 142 { 143 boot_cpuid_phys = phys; 144 } 145 #endif /* !CONFIG_SMP */ 146 #endif /* !CONFIG_PPC64 */ 147 148 extern int smt_enabled_at_boot; 149 150 extern int smp_mpic_probe(void); 151 extern void smp_mpic_setup_cpu(int cpu); 152 extern void smp_generic_kick_cpu(int nr); 153 154 extern void smp_generic_give_timebase(void); 155 extern void smp_generic_take_timebase(void); 156 157 extern struct smp_ops_t *smp_ops; 158 159 extern void arch_send_call_function_single_ipi(int cpu); 160 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 161 162 /* Definitions relative to the secondary CPU spin loop 163 * and entry point. Not all of them exist on both 32 and 164 * 64-bit but defining them all here doesn't harm 165 */ 166 extern void generic_secondary_smp_init(void); 167 extern void generic_secondary_thread_init(void); 168 extern unsigned long __secondary_hold_spinloop; 169 extern unsigned long __secondary_hold_acknowledge; 170 extern char __secondary_hold; 171 172 #endif /* __ASSEMBLY__ */ 173 174 #endif /* __KERNEL__ */ 175 #endif /* _ASM_POWERPC_SMP_H) */ 176