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