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> |
Milton Miller | 23d72bf | 2011-05-10 19:29:39 +0000 | [diff] [blame^] | 23 | #include <linux/irqreturn.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | #ifndef __ASSEMBLY__ |
| 26 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 27 | #ifdef CONFIG_PPC64 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <asm/paca.h> |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 29 | #endif |
Mike Travis | d5a7430 | 2007-10-16 01:24:05 -0700 | [diff] [blame] | 30 | #include <asm/percpu.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | |
| 32 | extern int boot_cpuid; |
Benjamin Herrenschmidt | 9d07bc8 | 2011-03-16 14:54:35 +1100 | [diff] [blame] | 33 | extern int boot_cpu_count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | |
| 35 | extern void cpu_die(void); |
| 36 | |
| 37 | #ifdef CONFIG_SMP |
| 38 | |
Milton Miller | 17f9c8a | 2011-05-10 19:29:35 +0000 | [diff] [blame] | 39 | struct smp_ops_t { |
| 40 | void (*message_pass)(int cpu, int msg); |
Milton Miller | 23d72bf | 2011-05-10 19:29:39 +0000 | [diff] [blame^] | 41 | void (*cause_ipi)(int cpu, unsigned long data); |
Milton Miller | 17f9c8a | 2011-05-10 19:29:35 +0000 | [diff] [blame] | 42 | int (*probe)(void); |
| 43 | int (*kick_cpu)(int nr); |
| 44 | void (*setup_cpu)(int nr); |
| 45 | void (*bringup_done)(void); |
| 46 | void (*take_timebase)(void); |
| 47 | void (*give_timebase)(void); |
| 48 | int (*cpu_disable)(void); |
| 49 | void (*cpu_die)(unsigned int nr); |
| 50 | int (*cpu_bootable)(unsigned int nr); |
| 51 | }; |
| 52 | |
Milton Miller | e047637 | 2011-05-10 19:29:06 +0000 | [diff] [blame] | 53 | extern void smp_send_debugger_break(void); |
Benjamin Herrenschmidt | fa3f82c | 2011-02-10 18:45:24 +1100 | [diff] [blame] | 54 | extern void start_secondary_resume(void); |
Milton Miller | 17f9c8a | 2011-05-10 19:29:35 +0000 | [diff] [blame] | 55 | extern void __devinit smp_generic_give_timebase(void); |
| 56 | extern void __devinit smp_generic_take_timebase(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Tejun Heo | 6b7487f | 2009-10-29 22:34:14 +0900 | [diff] [blame] | 58 | DECLARE_PER_CPU(unsigned int, cpu_pvr); |
Michael Ellerman | 1c21a29 | 2008-05-08 14:27:19 +1000 | [diff] [blame] | 59 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 60 | #ifdef CONFIG_HOTPLUG_CPU |
Benjamin Herrenschmidt | 1c91cc5 | 2011-02-11 13:05:17 +1100 | [diff] [blame] | 61 | extern void migrate_irqs(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | int generic_cpu_disable(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | void generic_cpu_die(unsigned int cpu); |
| 64 | void generic_mach_cpu_die(void); |
Benjamin Herrenschmidt | 105765f | 2011-04-01 09:23:37 +1100 | [diff] [blame] | 65 | void generic_set_cpu_dead(unsigned int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | #endif |
| 67 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 68 | #ifdef CONFIG_PPC64 |
Hugh Dickins | 048c8bc | 2006-11-01 05:44:54 +1100 | [diff] [blame] | 69 | #define raw_smp_processor_id() (local_paca->paca_index) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #define hard_smp_processor_id() (get_paca()->hw_cpu_id) |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 71 | #else |
| 72 | /* 32-bit */ |
| 73 | extern int smp_hw_index[]; |
| 74 | |
| 75 | #define raw_smp_processor_id() (current_thread_info()->cpu) |
| 76 | #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()]) |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 77 | |
| 78 | static inline int get_hard_smp_processor_id(int cpu) |
| 79 | { |
| 80 | return smp_hw_index[cpu]; |
| 81 | } |
| 82 | |
| 83 | static inline void set_hard_smp_processor_id(int cpu, int phys) |
| 84 | { |
| 85 | smp_hw_index[cpu] = phys; |
| 86 | } |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 87 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Anton Blanchard | cc1ba8e | 2010-04-26 15:32:41 +0000 | [diff] [blame] | 89 | DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map); |
| 90 | DECLARE_PER_CPU(cpumask_var_t, cpu_core_map); |
| 91 | |
| 92 | static inline struct cpumask *cpu_sibling_mask(int cpu) |
| 93 | { |
| 94 | return per_cpu(cpu_sibling_map, cpu); |
| 95 | } |
| 96 | |
| 97 | static inline struct cpumask *cpu_core_mask(int cpu) |
| 98 | { |
| 99 | return per_cpu(cpu_core_map, cpu); |
| 100 | } |
| 101 | |
Nathan Lynch | e9efed3 | 2008-07-27 15:24:54 +1000 | [diff] [blame] | 102 | extern int cpu_to_core_id(int cpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers. |
| 105 | * |
| 106 | * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up |
| 107 | * in /proc/interrupts will be wrong!!! --Troy */ |
| 108 | #define PPC_MSG_CALL_FUNCTION 0 |
| 109 | #define PPC_MSG_RESCHEDULE 1 |
Jens Axboe | b7d7a24 | 2008-06-26 11:22:13 +0200 | [diff] [blame] | 110 | #define PPC_MSG_CALL_FUNC_SINGLE 2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | #define PPC_MSG_DEBUGGER_BREAK 3 |
| 112 | |
Milton Miller | 23d72bf | 2011-05-10 19:29:39 +0000 | [diff] [blame^] | 113 | /* for irq controllers that have dedicated ipis per message (4) */ |
Milton Miller | 25ddd73 | 2008-11-14 20:11:49 +0000 | [diff] [blame] | 114 | extern int smp_request_message_ipi(int virq, int message); |
| 115 | extern const char *smp_ipi_name[]; |
| 116 | |
Milton Miller | 23d72bf | 2011-05-10 19:29:39 +0000 | [diff] [blame^] | 117 | /* for irq controllers with only a single ipi */ |
| 118 | extern void smp_muxed_ipi_set_data(int cpu, unsigned long data); |
| 119 | extern void smp_muxed_ipi_message_pass(int cpu, int msg); |
| 120 | extern void smp_muxed_ipi_resend(void); |
| 121 | extern irqreturn_t smp_ipi_demux(void); |
| 122 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | void smp_init_iSeries(void); |
| 124 | void smp_init_pSeries(void); |
Arnd Bergmann | 19fe047 | 2005-10-31 20:08:38 -0500 | [diff] [blame] | 125 | void smp_init_cell(void); |
Ishizaki Kou | c347b79 | 2007-02-02 16:47:17 +0900 | [diff] [blame] | 126 | void smp_init_celleb(void); |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 127 | void smp_setup_cpu_maps(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
| 129 | extern int __cpu_disable(void); |
| 130 | extern void __cpu_die(unsigned int cpu); |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 131 | |
| 132 | #else |
| 133 | /* for UP */ |
Kumar Gala | 78b5b62 | 2008-10-10 09:44:33 +0000 | [diff] [blame] | 134 | #define hard_smp_processor_id() get_hard_smp_processor_id(0) |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 135 | #define smp_setup_cpu_maps() |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | #endif /* CONFIG_SMP */ |
| 138 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 139 | #ifdef CONFIG_PPC64 |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 140 | static inline int get_hard_smp_processor_id(int cpu) |
| 141 | { |
| 142 | return paca[cpu].hw_cpu_id; |
| 143 | } |
| 144 | |
| 145 | static inline void set_hard_smp_processor_id(int cpu, int phys) |
| 146 | { |
| 147 | paca[cpu].hw_cpu_id = phys; |
| 148 | } |
Paul Mackerras | 2249ca9 | 2005-11-07 13:18:13 +1100 | [diff] [blame] | 149 | |
| 150 | extern void smp_release_cpus(void); |
| 151 | |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 152 | #else |
| 153 | /* 32-bit */ |
| 154 | #ifndef CONFIG_SMP |
Anton Blanchard | 4df2046 | 2006-03-25 17:25:17 +1100 | [diff] [blame] | 155 | extern int boot_cpuid_phys; |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 156 | static inline int get_hard_smp_processor_id(int cpu) |
| 157 | { |
| 158 | return boot_cpuid_phys; |
| 159 | } |
| 160 | |
| 161 | static inline void set_hard_smp_processor_id(int cpu, int phys) |
| 162 | { |
Kumar Gala | 78b5b62 | 2008-10-10 09:44:33 +0000 | [diff] [blame] | 163 | boot_cpuid_phys = phys; |
Benjamin Herrenschmidt | 41eba0a | 2008-08-18 14:23:48 +1000 | [diff] [blame] | 164 | } |
| 165 | #endif /* !CONFIG_SMP */ |
| 166 | #endif /* !CONFIG_PPC64 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
| 168 | extern int smt_enabled_at_boot; |
| 169 | |
| 170 | extern int smp_mpic_probe(void); |
| 171 | extern void smp_mpic_setup_cpu(int cpu); |
Michael Ellerman | de30097 | 2011-04-11 21:46:19 +0000 | [diff] [blame] | 172 | extern int smp_generic_kick_cpu(int nr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | |
| 174 | extern void smp_generic_give_timebase(void); |
| 175 | extern void smp_generic_take_timebase(void); |
| 176 | |
| 177 | extern struct smp_ops_t *smp_ops; |
| 178 | |
Jens Axboe | b7d7a24 | 2008-06-26 11:22:13 +0200 | [diff] [blame] | 179 | extern void arch_send_call_function_single_ipi(int cpu); |
Rusty Russell | f063ea0 | 2009-09-24 09:34:45 -0600 | [diff] [blame] | 180 | extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); |
Jens Axboe | b7d7a24 | 2008-06-26 11:22:13 +0200 | [diff] [blame] | 181 | |
Benjamin Herrenschmidt | cf54dc7 | 2009-07-23 23:15:28 +0000 | [diff] [blame] | 182 | /* Definitions relative to the secondary CPU spin loop |
| 183 | * and entry point. Not all of them exist on both 32 and |
| 184 | * 64-bit but defining them all here doesn't harm |
| 185 | */ |
| 186 | extern void generic_secondary_smp_init(void); |
Benjamin Herrenschmidt | 2d27cfd | 2009-07-23 23:15:59 +0000 | [diff] [blame] | 187 | extern void generic_secondary_thread_init(void); |
Benjamin Herrenschmidt | cf54dc7 | 2009-07-23 23:15:28 +0000 | [diff] [blame] | 188 | extern unsigned long __secondary_hold_spinloop; |
| 189 | extern unsigned long __secondary_hold_acknowledge; |
| 190 | extern char __secondary_hold; |
| 191 | |
Milton Miller | 23d72bf | 2011-05-10 19:29:39 +0000 | [diff] [blame^] | 192 | extern irqreturn_t debug_ipi_action(int irq, void *data); |
| 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | #endif /* __ASSEMBLY__ */ |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | #endif /* __KERNEL__ */ |
Paul Mackerras | 5ad5707 | 2005-11-05 10:33:55 +1100 | [diff] [blame] | 197 | #endif /* _ASM_POWERPC_SMP_H) */ |