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 31extern int boot_cpuid; 32 33extern void cpu_die(void); 34 35#ifdef CONFIG_SMP 36 37extern void smp_send_debugger_break(int cpu); 38extern void smp_message_recv(int); 39 40DECLARE_PER_CPU(unsigned int, cpu_pvr); 41 42#ifdef CONFIG_HOTPLUG_CPU 43extern void fixup_irqs(const struct cpumask *map); 44int generic_cpu_disable(void); 45int generic_cpu_enable(unsigned int cpu); 46void generic_cpu_die(unsigned int cpu); 47void 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 */ 55extern 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 60static inline int get_hard_smp_processor_id(int cpu) 61{ 62 return smp_hw_index[cpu]; 63} 64 65static inline void set_hard_smp_processor_id(int cpu, int phys) 66{ 67 smp_hw_index[cpu] = phys; 68} 69#endif 70 71DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); 72DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); 73 74static inline struct cpumask *cpu_sibling_mask(int cpu) 75{ 76 return per_cpu(cpu_sibling_map, cpu); 77} 78 79static inline struct cpumask *cpu_core_mask(int cpu) 80{ 81 return per_cpu(cpu_core_map, cpu); 82} 83 84extern 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 */ 99extern int smp_request_message_ipi(int virq, int message); 100extern const char *smp_ipi_name[]; 101 102void smp_init_iSeries(void); 103void smp_init_pSeries(void); 104void smp_init_cell(void); 105void smp_init_celleb(void); 106void smp_setup_cpu_maps(void); 107 108extern int __cpu_disable(void); 109extern 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 119static inline int get_hard_smp_processor_id(int cpu) 120{ 121 return paca[cpu].hw_cpu_id; 122} 123 124static inline void set_hard_smp_processor_id(int cpu, int phys) 125{ 126 paca[cpu].hw_cpu_id = phys; 127} 128 129extern void smp_release_cpus(void); 130 131#else 132/* 32-bit */ 133#ifndef CONFIG_SMP 134extern int boot_cpuid_phys; 135static inline int get_hard_smp_processor_id(int cpu) 136{ 137 return boot_cpuid_phys; 138} 139 140static 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 147extern int smt_enabled_at_boot; 148 149extern int smp_mpic_probe(void); 150extern void smp_mpic_setup_cpu(int cpu); 151extern void smp_generic_kick_cpu(int nr); 152 153extern void smp_generic_give_timebase(void); 154extern void smp_generic_take_timebase(void); 155 156extern struct smp_ops_t *smp_ops; 157 158extern void arch_send_call_function_single_ipi(int cpu); 159extern 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 */ 165extern void generic_secondary_smp_init(void); 166extern void generic_secondary_thread_init(void); 167extern unsigned long __secondary_hold_spinloop; 168extern unsigned long __secondary_hold_acknowledge; 169extern char __secondary_hold; 170 171#endif /* __ASSEMBLY__ */ 172 173#endif /* __KERNEL__ */ 174#endif /* _ASM_POWERPC_SMP_H) */ 175