arch/powerpc/include/asm/smp.h

   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 #include <linux/irqreturn.h>
  24
  25 #ifndef __ASSEMBLY__
  26
  27 #ifdef CONFIG_PPC64
  28 #include <asm/paca.h>
  29 #endif
  30 #include <asm/percpu.h>
  31
  32 extern int boot_cpuid;
  33 extern int spinning_secondaries;
  34
  35 extern void cpu_die(void);
  36
  37 #ifdef CONFIG_SMP
  38
  39 struct smp_ops_t {
  40         void  (*message_pass)(int cpu, int msg);
  41 #ifdef CONFIG_PPC_SMP_MUXED_IPI
  42         void  (*cause_ipi)(int cpu, unsigned long data);
  43 #endif
  44         int   (*probe)(void);
  45         int   (*kick_cpu)(int nr);
  46         void  (*setup_cpu)(int nr);
  47         void  (*bringup_done)(void);
  48         void  (*take_timebase)(void);
  49         void  (*give_timebase)(void);
  50         int   (*cpu_disable)(void);
  51         void  (*cpu_die)(unsigned int nr);
  52         int   (*cpu_bootable)(unsigned int nr);
  53 };
  54
  55 extern void smp_send_debugger_break(void);
  56 extern void start_secondary_resume(void);
  57 extern void __devinit smp_generic_give_timebase(void);
  58 extern void __devinit smp_generic_take_timebase(void);
  59
  60 DECLARE_PER_CPU(unsigned int, cpu_pvr);
  61
  62 #ifdef CONFIG_HOTPLUG_CPU
  63 extern void migrate_irqs(void);
  64 int generic_cpu_disable(void);
  65 void generic_cpu_die(unsigned int cpu);
  66 void generic_mach_cpu_die(void);
  67 void generic_set_cpu_dead(unsigned int cpu);
  68 #endif
  69
  70 #ifdef CONFIG_PPC64
  71 #define raw_smp_processor_id()  (local_paca->paca_index)
  72 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  73 #else
  74 /* 32-bit */
  75 extern int smp_hw_index[];
  76
  77 #define raw_smp_processor_id()  (current_thread_info()->cpu)
  78 #define hard_smp_processor_id()         (smp_hw_index[smp_processor_id()])
  79
  80 static inline int get_hard_smp_processor_id(int cpu)
  81 {
  82         return smp_hw_index[cpu];
  83 }
  84
  85 static inline void set_hard_smp_processor_id(int cpu, int phys)
  86 {
  87         smp_hw_index[cpu] = phys;
  88 }
  89 #endif
  90
  91 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
  92 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
  93
  94 static inline struct cpumask *cpu_sibling_mask(int cpu)
  95 {
  96         return per_cpu(cpu_sibling_map, cpu);
  97 }
  98
  99 static inline struct cpumask *cpu_core_mask(int cpu)
 100 {
 101         return per_cpu(cpu_core_map, cpu);
 102 }
 103
 104 extern int cpu_to_core_id(int cpu);
 105
 106 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
 107  *
 108  * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
 109  * in /proc/interrupts will be wrong!!! --Troy */
 110 #define PPC_MSG_CALL_FUNCTION   0
 111 #define PPC_MSG_RESCHEDULE      1
 112 #define PPC_MSG_CALL_FUNC_SINGLE        2
 113 #define PPC_MSG_DEBUGGER_BREAK  3
 114
 115 /* for irq controllers that have dedicated ipis per message (4) */
 116 extern int smp_request_message_ipi(int virq, int message);
 117 extern const char *smp_ipi_name[];
 118
 119 /* for irq controllers with only a single ipi */
 120 extern void smp_muxed_ipi_set_data(int cpu, unsigned long data);
 121 extern void smp_muxed_ipi_message_pass(int cpu, int msg);
 122 extern irqreturn_t smp_ipi_demux(void);
 123
 124 void smp_init_iSeries(void);
 125 void smp_init_pSeries(void);
 126 void smp_init_cell(void);
 127 void smp_init_celleb(void);
 128 void smp_setup_cpu_maps(void);
 129
 130 extern int __cpu_disable(void);
 131 extern void __cpu_die(unsigned int cpu);
 132
 133 #else
 134 /* for UP */
 135 #define hard_smp_processor_id()         get_hard_smp_processor_id(0)
 136 #define smp_setup_cpu_maps()
 137
 138 #endif /* CONFIG_SMP */
 139
 140 #ifdef CONFIG_PPC64
 141 static inline int get_hard_smp_processor_id(int cpu)
 142 {
 143         return paca[cpu].hw_cpu_id;
 144 }
 145
 146 static inline void set_hard_smp_processor_id(int cpu, int phys)
 147 {
 148         paca[cpu].hw_cpu_id = phys;
 149 }
 150
 151 extern void smp_release_cpus(void);
 152
 153 #else
 154 /* 32-bit */
 155 #ifndef CONFIG_SMP
 156 extern int boot_cpuid_phys;
 157 static inline int get_hard_smp_processor_id(int cpu)
 158 {
 159         return boot_cpuid_phys;
 160 }
 161
 162 static inline void set_hard_smp_processor_id(int cpu, int phys)
 163 {
 164         boot_cpuid_phys = phys;
 165 }
 166 #endif /* !CONFIG_SMP */
 167 #endif /* !CONFIG_PPC64 */
 168
 169 extern int smt_enabled_at_boot;
 170
 171 extern int smp_mpic_probe(void);
 172 extern void smp_mpic_setup_cpu(int cpu);
 173 extern int smp_generic_kick_cpu(int nr);
 174
 175 extern void smp_generic_give_timebase(void);
 176 extern void smp_generic_take_timebase(void);
 177
 178 extern struct smp_ops_t *smp_ops;
 179
 180 extern void arch_send_call_function_single_ipi(int cpu);
 181 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 182
 183 /* Definitions relative to the secondary CPU spin loop
 184  * and entry point. Not all of them exist on both 32 and
 185  * 64-bit but defining them all here doesn't harm
 186  */
 187 extern void generic_secondary_smp_init(void);
 188 extern void generic_secondary_thread_init(void);
 189 extern unsigned long __secondary_hold_spinloop;
 190 extern unsigned long __secondary_hold_acknowledge;
 191 extern char __secondary_hold;
 192
 193 #endif /* __ASSEMBLY__ */
 194
 195 #endif /* __KERNEL__ */
 196 #endif /* _ASM_POWERPC_SMP_H) */