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 #include <linux/irqreturn.h> 24 25 #ifndef __ASSEMBLY__ 26 27 #ifdef CONFIG_PPC64 28 #include <asm/paca.h> 29 #endif 30 #include <asm/percpu.h> 31 32 extern int boot_cpuid; 33 extern int spinning_secondaries; 34 35 extern void cpu_die(void); 36 37 #ifdef CONFIG_SMP 38 39 struct smp_ops_t { 40 void (*message_pass)(int cpu, int msg); 41 #ifdef CONFIG_PPC_SMP_MUXED_IPI 42 void (*cause_ipi)(int cpu, unsigned long data); 43 #endif 44 int (*probe)(void); 45 int (*kick_cpu)(int nr); 46 void (*setup_cpu)(int nr); 47 void (*bringup_done)(void); 48 void (*take_timebase)(void); 49 void (*give_timebase)(void); 50 int (*cpu_disable)(void); 51 void (*cpu_die)(unsigned int nr); 52 int (*cpu_bootable)(unsigned int nr); 53 }; 54 55 extern void smp_send_debugger_break(void); 56 extern void start_secondary_resume(void); 57 extern void smp_generic_give_timebase(void); 58 extern void smp_generic_take_timebase(void); 59 60 DECLARE_PER_CPU(unsigned int, cpu_pvr); 61 62 #ifdef CONFIG_HOTPLUG_CPU 63 extern void migrate_irqs(void); 64 int generic_cpu_disable(void); 65 void generic_cpu_die(unsigned int cpu); 66 void generic_mach_cpu_die(void); 67 void generic_set_cpu_dead(unsigned int cpu); 68 void generic_set_cpu_up(unsigned int cpu); 69 int generic_check_cpu_restart(unsigned int cpu); 70 71 extern void inhibit_secondary_onlining(void); 72 extern void uninhibit_secondary_onlining(void); 73 74 #else /* HOTPLUG_CPU */ 75 static inline void inhibit_secondary_onlining(void) {} 76 static inline void uninhibit_secondary_onlining(void) {} 77 78 #endif 79 80 #ifdef CONFIG_PPC64 81 #define raw_smp_processor_id() (local_paca->paca_index) 82 #define hard_smp_processor_id() (get_paca()->hw_cpu_id) 83 #else 84 /* 32-bit */ 85 extern int smp_hw_index[]; 86 87 #define raw_smp_processor_id() (current_thread_info()->cpu) 88 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()]) 89 90 static inline int get_hard_smp_processor_id(int cpu) 91 { 92 return smp_hw_index[cpu]; 93 } 94 95 static inline void set_hard_smp_processor_id(int cpu, int phys) 96 { 97 smp_hw_index[cpu] = phys; 98 } 99 #endif 100 101 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); 102 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); 103 104 static inline struct cpumask *cpu_sibling_mask(int cpu) 105 { 106 return per_cpu(cpu_sibling_map, cpu); 107 } 108 109 static inline struct cpumask *cpu_core_mask(int cpu) 110 { 111 return per_cpu(cpu_core_map, cpu); 112 } 113 114 extern int cpu_to_core_id(int cpu); 115 extern int cpu_to_chip_id(int cpu); 116 117 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. 118 * 119 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up 120 * in /proc/interrupts will be wrong!!! --Troy */ 121 #define PPC_MSG_CALL_FUNCTION 0 122 #define PPC_MSG_RESCHEDULE 1 123 #define PPC_MSG_CALL_FUNC_SINGLE 2 124 #define PPC_MSG_DEBUGGER_BREAK 3 125 126 /* for irq controllers that have dedicated ipis per message (4) */ 127 extern int smp_request_message_ipi(int virq, int message); 128 extern const char *smp_ipi_name[]; 129 130 /* for irq controllers with only a single ipi */ 131 extern void smp_muxed_ipi_set_data(int cpu, unsigned long data); 132 extern void smp_muxed_ipi_message_pass(int cpu, int msg); 133 extern irqreturn_t smp_ipi_demux(void); 134 135 void smp_init_pSeries(void); 136 void smp_init_cell(void); 137 void smp_init_celleb(void); 138 void smp_setup_cpu_maps(void); 139 140 extern int __cpu_disable(void); 141 extern void __cpu_die(unsigned int cpu); 142 143 #else 144 /* for UP */ 145 #define hard_smp_processor_id() get_hard_smp_processor_id(0) 146 #define smp_setup_cpu_maps() 147 static inline void inhibit_secondary_onlining(void) {} 148 static inline void uninhibit_secondary_onlining(void) {} 149 static inline const struct cpumask *cpu_sibling_mask(int cpu) 150 { 151 return cpumask_of(cpu); 152 } 153 154 #endif /* CONFIG_SMP */ 155 156 #ifdef CONFIG_PPC64 157 static inline int get_hard_smp_processor_id(int cpu) 158 { 159 return paca[cpu].hw_cpu_id; 160 } 161 162 static inline void set_hard_smp_processor_id(int cpu, int phys) 163 { 164 paca[cpu].hw_cpu_id = phys; 165 } 166 167 extern void smp_release_cpus(void); 168 169 #else 170 /* 32-bit */ 171 #ifndef CONFIG_SMP 172 extern int boot_cpuid_phys; 173 static inline int get_hard_smp_processor_id(int cpu) 174 { 175 return boot_cpuid_phys; 176 } 177 178 static inline void set_hard_smp_processor_id(int cpu, int phys) 179 { 180 boot_cpuid_phys = phys; 181 } 182 #endif /* !CONFIG_SMP */ 183 #endif /* !CONFIG_PPC64 */ 184 185 extern int smt_enabled_at_boot; 186 187 extern int smp_mpic_probe(void); 188 extern void smp_mpic_setup_cpu(int cpu); 189 extern int smp_generic_kick_cpu(int nr); 190 extern int smp_generic_cpu_bootable(unsigned int nr); 191 192 193 extern void smp_generic_give_timebase(void); 194 extern void smp_generic_take_timebase(void); 195 196 extern struct smp_ops_t *smp_ops; 197 198 extern void arch_send_call_function_single_ipi(int cpu); 199 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 200 201 /* Definitions relative to the secondary CPU spin loop 202 * and entry point. Not all of them exist on both 32 and 203 * 64-bit but defining them all here doesn't harm 204 */ 205 extern void generic_secondary_smp_init(void); 206 extern void generic_secondary_thread_init(void); 207 extern unsigned long __secondary_hold_spinloop; 208 extern unsigned long __secondary_hold_acknowledge; 209 extern char __secondary_hold; 210 211 extern void __early_start(void); 212 #endif /* __ASSEMBLY__ */ 213 214 #endif /* __KERNEL__ */ 215 #endif /* _ASM_POWERPC_SMP_H) */ 216