Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 2 | * smp.h: PowerPC-specific SMP code. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 16 | #ifndef _ASM_POWERPC_SMP_H |
| 17 | #define _ASM_POWERPC_SMP_H |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #ifdef __KERNEL__ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include <linux/threads.h> |
| 21 | #include <linux/cpumask.h> |
| 22 | #include <linux/kernel.h> |
| 23 | |
| 24 | #ifndef __ASSEMBLY__ |
| 25 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 26 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <asm/paca.h> |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 28 | #endif |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 29 | #include <asm/percpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | |
| 31 | extern int boot_cpuid; |
Benjamin Herrenschmidt | 9d07bc8 | 2011-03-16 14:54:35 +1100 | [diff] [blame] | 32 | extern int boot_cpu_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
| 34 | extern void cpu_die(void); |
| 35 | |
| 36 | #ifdef CONFIG_SMP |
| 37 | |
Milton Miller | 17f9c8a | 2011-05-10 19:29:35 +0000 | [diff] [blame^] | 38 | struct smp_ops_t { |
| 39 | void (*message_pass)(int cpu, int msg); |
| 40 | int (*probe)(void); |
| 41 | int (*kick_cpu)(int nr); |
| 42 | void (*setup_cpu)(int nr); |
| 43 | void (*bringup_done)(void); |
| 44 | void (*take_timebase)(void); |
| 45 | void (*give_timebase)(void); |
| 46 | int (*cpu_disable)(void); |
| 47 | void (*cpu_die)(unsigned int nr); |
| 48 | int (*cpu_bootable)(unsigned int nr); |
| 49 | }; |
| 50 | |
Milton Miller | e047637 | 2011-05-10 19:29:06 +0000 | [diff] [blame] | 51 | extern void smp_send_debugger_break(void); |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 52 | extern void smp_message_recv(int); |
Benjamin Herrenschmidt | fa3f82c | 2011-02-10 18:45:24 +1100 | [diff] [blame] | 53 | extern void start_secondary_resume(void); |
Milton Miller | 17f9c8a | 2011-05-10 19:29:35 +0000 | [diff] [blame^] | 54 | extern void __devinit smp_generic_give_timebase(void); |
| 55 | extern void __devinit smp_generic_take_timebase(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Tejun Heo | 6b7487f | 2009-10-29 22:34:14 +0900 | [diff] [blame] | 57 | DECLARE_PER_CPU(unsigned int, cpu_pvr); |
Michael Ellerman | 1c21a29 | 2008-05-08 14:27:19 +1000 | [diff] [blame] | 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | #ifdef CONFIG_HOTPLUG_CPU |
Benjamin Herrenschmidt | 1c91cc5 | 2011-02-11 13:05:17 +1100 | [diff] [blame] | 60 | extern void migrate_irqs(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | int generic_cpu_disable(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | void generic_cpu_die(unsigned int cpu); |
| 63 | void generic_mach_cpu_die(void); |
Benjamin Herrenschmidt | 105765f | 2011-04-01 09:23:37 +1100 | [diff] [blame] | 64 | void generic_set_cpu_dead(unsigned int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #endif |
| 66 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 67 | #ifdef CONFIG_PPC64 |
Hugh Dickins | 048c8bc | 2006-11-01 05:44:54 +1100 | [diff] [blame] | 68 | #define raw_smp_processor_id() (local_paca->paca_index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #define hard_smp_processor_id() (get_paca()->hw_cpu_id) |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 70 | #else |
| 71 | /* 32-bit */ |
| 72 | extern int smp_hw_index[]; |
| 73 | |
| 74 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
| 75 | #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()]) |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 76 | |
| 77 | static inline int get_hard_smp_processor_id(int cpu) |
| 78 | { |
| 79 | return smp_hw_index[cpu]; |
| 80 | } |
| 81 | |
| 82 | static inline void set_hard_smp_processor_id(int cpu, int phys) |
| 83 | { |
| 84 | smp_hw_index[cpu] = phys; |
| 85 | } |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 86 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Anton Blanchard | cc1ba8e | 2010-04-26 15:32:41 +0000 | [diff] [blame] | 88 | DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); |
| 89 | DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); |
| 90 | |
| 91 | static inline struct cpumask *cpu_sibling_mask(int cpu) |
| 92 | { |
| 93 | return per_cpu(cpu_sibling_map, cpu); |
| 94 | } |
| 95 | |
| 96 | static inline struct cpumask *cpu_core_mask(int cpu) |
| 97 | { |
| 98 | return per_cpu(cpu_core_map, cpu); |
| 99 | } |
| 100 | |
Nathan Lynch | e9efed3 | 2008-07-27 15:24:54 +1000 | [diff] [blame] | 101 | extern int cpu_to_core_id(int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | |
| 103 | /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. |
| 104 | * |
| 105 | * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up |
| 106 | * in /proc/interrupts will be wrong!!! --Troy */ |
| 107 | #define PPC_MSG_CALL_FUNCTION 0 |
| 108 | #define PPC_MSG_RESCHEDULE 1 |
Jens Axboe | b7d7a24 | 2008-06-26 11:22:13 +0200 | [diff] [blame] | 109 | #define PPC_MSG_CALL_FUNC_SINGLE 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | #define PPC_MSG_DEBUGGER_BREAK 3 |
| 111 | |
Milton Miller | 25ddd73 | 2008-11-14 20:11:49 +0000 | [diff] [blame] | 112 | /* |
| 113 | * irq controllers that have dedicated ipis per message and don't |
| 114 | * need additional code in the action handler may use this |
| 115 | */ |
| 116 | extern int smp_request_message_ipi(int virq, int message); |
| 117 | extern const char *smp_ipi_name[]; |
| 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | void smp_init_iSeries(void); |
| 120 | void smp_init_pSeries(void); |
Arnd Bergmann | 19fe047 | 2005-10-31 20:08:38 -0500 | [diff] [blame] | 121 | void smp_init_cell(void); |
Ishizaki Kou | c347b79 | 2007-02-02 16:47:17 +0900 | [diff] [blame] | 122 | void smp_init_celleb(void); |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 123 | void smp_setup_cpu_maps(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
| 125 | extern int __cpu_disable(void); |
| 126 | extern void __cpu_die(unsigned int cpu); |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 127 | |
| 128 | #else |
| 129 | /* for UP */ |
Kumar Gala | 78b5b62 | 2008-10-10 09:44:33 +0000 | [diff] [blame] | 130 | #define hard_smp_processor_id() get_hard_smp_processor_id(0) |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 131 | #define smp_setup_cpu_maps() |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | #endif /* CONFIG_SMP */ |
| 134 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 135 | #ifdef CONFIG_PPC64 |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 136 | static inline int get_hard_smp_processor_id(int cpu) |
| 137 | { |
| 138 | return paca[cpu].hw_cpu_id; |
| 139 | } |
| 140 | |
| 141 | static inline void set_hard_smp_processor_id(int cpu, int phys) |
| 142 | { |
| 143 | paca[cpu].hw_cpu_id = phys; |
| 144 | } |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 145 | |
| 146 | extern void smp_release_cpus(void); |
| 147 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 148 | #else |
| 149 | /* 32-bit */ |
| 150 | #ifndef CONFIG_SMP |
Anton Blanchard | 4df2046 | 2006-03-25 17:25:17 +1100 | [diff] [blame] | 151 | extern int boot_cpuid_phys; |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 152 | static inline int get_hard_smp_processor_id(int cpu) |
| 153 | { |
| 154 | return boot_cpuid_phys; |
| 155 | } |
| 156 | |
| 157 | static inline void set_hard_smp_processor_id(int cpu, int phys) |
| 158 | { |
Kumar Gala | 78b5b62 | 2008-10-10 09:44:33 +0000 | [diff] [blame] | 159 | boot_cpuid_phys = phys; |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 160 | } |
| 161 | #endif /* !CONFIG_SMP */ |
| 162 | #endif /* !CONFIG_PPC64 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
| 164 | extern int smt_enabled_at_boot; |
| 165 | |
| 166 | extern int smp_mpic_probe(void); |
| 167 | extern void smp_mpic_setup_cpu(int cpu); |
Michael Ellerman | de30097 | 2011-04-11 21:46:19 +0000 | [diff] [blame] | 168 | extern int smp_generic_kick_cpu(int nr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | |
| 170 | extern void smp_generic_give_timebase(void); |
| 171 | extern void smp_generic_take_timebase(void); |
| 172 | |
| 173 | extern struct smp_ops_t *smp_ops; |
| 174 | |
Jens Axboe | b7d7a24 | 2008-06-26 11:22:13 +0200 | [diff] [blame] | 175 | extern void arch_send_call_function_single_ipi(int cpu); |
Rusty Russell | f063ea0 | 2009-09-24 09:34:45 -0600 | [diff] [blame] | 176 | extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); |
Jens Axboe | b7d7a24 | 2008-06-26 11:22:13 +0200 | [diff] [blame] | 177 | |
Benjamin Herrenschmidt | cf54dc7 | 2009-07-23 23:15:28 +0000 | [diff] [blame] | 178 | /* Definitions relative to the secondary CPU spin loop |
| 179 | * and entry point. Not all of them exist on both 32 and |
| 180 | * 64-bit but defining them all here doesn't harm |
| 181 | */ |
| 182 | extern void generic_secondary_smp_init(void); |
Benjamin Herrenschmidt | 2d27cfd | 2009-07-23 23:15:59 +0000 | [diff] [blame] | 183 | extern void generic_secondary_thread_init(void); |
Benjamin Herrenschmidt | cf54dc7 | 2009-07-23 23:15:28 +0000 | [diff] [blame] | 184 | extern unsigned long __secondary_hold_spinloop; |
| 185 | extern unsigned long __secondary_hold_acknowledge; |
| 186 | extern char __secondary_hold; |
| 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | #endif /* __ASSEMBLY__ */ |
| 189 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | #endif /* __KERNEL__ */ |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 191 | #endif /* _ASM_POWERPC_SMP_H) */ |