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 40 DECLARE_PER_CPU(unsigned int, cpu_pvr); 41 42 #ifdef CONFIG_HOTPLUG_CPU 43 extern void fixup_irqs(const struct cpumask *map); 44 int generic_cpu_disable(void); 45 int generic_cpu_enable(unsigned int cpu); 46 void generic_cpu_die(unsigned int cpu); 47 void generic_mach_cpu_die(void); 48 #endif 49 50 #ifdef CONFIG_PPC64 51 #define raw_smp_processor_id() (local_paca->paca_index) 52 #define hard_smp_processor_id() (get_paca()->hw_cpu_id) 53 #else 54 /* 32-bit */ 55 extern int smp_hw_index[]; 56 57 #define raw_smp_processor_id() (current_thread_info()->cpu) 58 #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()]) 59 60 static inline int get_hard_smp_processor_id(int cpu) 61 { 62 return smp_hw_index[cpu]; 63 } 64 65 static inline void set_hard_smp_processor_id(int cpu, int phys) 66 { 67 smp_hw_index[cpu] = phys; 68 } 69 #endif 70 71 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); 72 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); 73 74 static inline struct cpumask *cpu_sibling_mask(int cpu) 75 { 76 return per_cpu(cpu_sibling_map, cpu); 77 } 78 79 static inline struct cpumask *cpu_core_mask(int cpu) 80 { 81 return per_cpu(cpu_core_map, cpu); 82 } 83 84 extern int cpu_to_core_id(int cpu); 85 86 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. 87 * 88 * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up 89 * in /proc/interrupts will be wrong!!! --Troy */ 90 #define PPC_MSG_CALL_FUNCTION 0 91 #define PPC_MSG_RESCHEDULE 1 92 #define PPC_MSG_CALL_FUNC_SINGLE 2 93 #define PPC_MSG_DEBUGGER_BREAK 3 94 95 /* 96 * irq controllers that have dedicated ipis per message and don't 97 * need additional code in the action handler may use this 98 */ 99 extern int smp_request_message_ipi(int virq, int message); 100 extern const char *smp_ipi_name[]; 101 102 void smp_init_iSeries(void); 103 void smp_init_pSeries(void); 104 void smp_init_cell(void); 105 void smp_init_celleb(void); 106 void smp_setup_cpu_maps(void); 107 108 extern int __cpu_disable(void); 109 extern void __cpu_die(unsigned int cpu); 110 111 #else 112 /* for UP */ 113 #define hard_smp_processor_id() get_hard_smp_processor_id(0) 114 #define smp_setup_cpu_maps() 115 116 #endif /* CONFIG_SMP */ 117 118 #ifdef CONFIG_PPC64 119 static inline int get_hard_smp_processor_id(int cpu) 120 { 121 return paca[cpu].hw_cpu_id; 122 } 123 124 static inline void set_hard_smp_processor_id(int cpu, int phys) 125 { 126 paca[cpu].hw_cpu_id = phys; 127 } 128 129 extern void smp_release_cpus(void); 130 131 #else 132 /* 32-bit */ 133 #ifndef CONFIG_SMP 134 extern int boot_cpuid_phys; 135 static inline int get_hard_smp_processor_id(int cpu) 136 { 137 return boot_cpuid_phys; 138 } 139 140 static inline void set_hard_smp_processor_id(int cpu, int phys) 141 { 142 boot_cpuid_phys = phys; 143 } 144 #endif /* !CONFIG_SMP */ 145 #endif /* !CONFIG_PPC64 */ 146 147 extern int smt_enabled_at_boot; 148 149 extern int smp_mpic_probe(void); 150 extern void smp_mpic_setup_cpu(int cpu); 151 extern void smp_generic_kick_cpu(int nr); 152 153 extern void smp_generic_give_timebase(void); 154 extern void smp_generic_take_timebase(void); 155 156 extern struct smp_ops_t *smp_ops; 157 158 extern void arch_send_call_function_single_ipi(int cpu); 159 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); 160 161 /* Definitions relative to the secondary CPU spin loop 162 * and entry point. Not all of them exist on both 32 and 163 * 64-bit but defining them all here doesn't harm 164 */ 165 extern void generic_secondary_smp_init(void); 166 extern void generic_secondary_thread_init(void); 167 extern unsigned long __secondary_hold_spinloop; 168 extern unsigned long __secondary_hold_acknowledge; 169 extern char __secondary_hold; 170 171 #endif /* __ASSEMBLY__ */ 172 173 #endif /* __KERNEL__ */ 174 #endif /* _ASM_POWERPC_SMP_H) */ 175