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 void smp_init_iSeries(void); 85 void smp_init_pSeries(void); 86 void smp_init_cell(void); 87 void smp_init_celleb(void); 88 void smp_setup_cpu_maps(void); 89 void smp_setup_cpu_sibling_map(void); 90 91 extern int __cpu_disable(void); 92 extern void __cpu_die(unsigned int cpu); 93 94 #else 95 /* for UP */ 96 #define hard_smp_processor_id() get_hard_smp_processor_id(0) 97 #define smp_setup_cpu_maps() 98 99 #endif /* CONFIG_SMP */ 100 101 #ifdef CONFIG_PPC64 102 static inline int get_hard_smp_processor_id(int cpu) 103 { 104 return paca[cpu].hw_cpu_id; 105 } 106 107 static inline void set_hard_smp_processor_id(int cpu, int phys) 108 { 109 paca[cpu].hw_cpu_id = phys; 110 } 111 112 extern void smp_release_cpus(void); 113 114 #else 115 /* 32-bit */ 116 #ifndef CONFIG_SMP 117 extern int boot_cpuid_phys; 118 static inline int get_hard_smp_processor_id(int cpu) 119 { 120 return boot_cpuid_phys; 121 } 122 123 static inline void set_hard_smp_processor_id(int cpu, int phys) 124 { 125 boot_cpuid_phys = phys; 126 } 127 #endif /* !CONFIG_SMP */ 128 #endif /* !CONFIG_PPC64 */ 129 130 extern int smt_enabled_at_boot; 131 132 extern int smp_mpic_probe(void); 133 extern void smp_mpic_setup_cpu(int cpu); 134 extern void smp_generic_kick_cpu(int nr); 135 136 extern void smp_generic_give_timebase(void); 137 extern void smp_generic_take_timebase(void); 138 139 extern struct smp_ops_t *smp_ops; 140 141 extern void arch_send_call_function_single_ipi(int cpu); 142 extern void arch_send_call_function_ipi(cpumask_t mask); 143 144 #endif /* __ASSEMBLY__ */ 145 146 #endif /* __KERNEL__ */ 147 #endif /* _ASM_POWERPC_SMP_H) */ 148