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
  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 extern void start_secondary_resume(void);
  40
  41 DECLARE_PER_CPU(unsigned int, cpu_pvr);
  42
  43 #ifdef CONFIG_HOTPLUG_CPU
  44 extern void migrate_irqs(void);
  45 int generic_cpu_disable(void);
  46 void generic_cpu_die(unsigned int cpu);
  47 void generic_mach_cpu_die(void);
  48 DECLARE_PER_CPU(int, cpu_state);
  49 #endif
  50
  51 #ifdef CONFIG_PPC64
  52 #define raw_smp_processor_id()  (local_paca->paca_index)
  53 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  54 #else
  55 /* 32-bit */
  56 extern int smp_hw_index[];
  57
  58 #define raw_smp_processor_id()  (current_thread_info()->cpu)
  59 #define hard_smp_processor_id()         (smp_hw_index[smp_processor_id()])
  60
  61 static inline int get_hard_smp_processor_id(int cpu)
  62 {
  63         return smp_hw_index[cpu];
  64 }
  65
  66 static inline void set_hard_smp_processor_id(int cpu, int phys)
  67 {
  68         smp_hw_index[cpu] = phys;
  69 }
  70 #endif
  71
  72 DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
  73 DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
  74
  75 static inline struct cpumask *cpu_sibling_mask(int cpu)
  76 {
  77         return per_cpu(cpu_sibling_map, cpu);
  78 }
  79
  80 static inline struct cpumask *cpu_core_mask(int cpu)
  81 {
  82         return per_cpu(cpu_core_map, cpu);
  83 }
  84
  85 extern int cpu_to_core_id(int cpu);
  86
  87 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
  88  *
  89  * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
  90  * in /proc/interrupts will be wrong!!! --Troy */
  91 #define PPC_MSG_CALL_FUNCTION   0
  92 #define PPC_MSG_RESCHEDULE      1
  93 #define PPC_MSG_CALL_FUNC_SINGLE        2
  94 #define PPC_MSG_DEBUGGER_BREAK  3
  95
  96 /*
  97  * irq controllers that have dedicated ipis per message and don't
  98  * need additional code in the action handler may use this
  99  */
 100 extern int smp_request_message_ipi(int virq, int message);
 101 extern const char *smp_ipi_name[];
 102
 103 void smp_init_iSeries(void);
 104 void smp_init_pSeries(void);
 105 void smp_init_cell(void);
 106 void smp_init_celleb(void);
 107 void smp_setup_cpu_maps(void);
 108
 109 extern int __cpu_disable(void);
 110 extern void __cpu_die(unsigned int cpu);
 111
 112 #else
 113 /* for UP */
 114 #define hard_smp_processor_id()         get_hard_smp_processor_id(0)
 115 #define smp_setup_cpu_maps()
 116
 117 #endif /* CONFIG_SMP */
 118
 119 #ifdef CONFIG_PPC64
 120 static inline int get_hard_smp_processor_id(int cpu)
 121 {
 122         return paca[cpu].hw_cpu_id;
 123 }
 124
 125 static inline void set_hard_smp_processor_id(int cpu, int phys)
 126 {
 127         paca[cpu].hw_cpu_id = phys;
 128 }
 129
 130 extern void smp_release_cpus(void);
 131
 132 #else
 133 /* 32-bit */
 134 #ifndef CONFIG_SMP
 135 extern int boot_cpuid_phys;
 136 static inline int get_hard_smp_processor_id(int cpu)
 137 {
 138         return boot_cpuid_phys;
 139 }
 140
 141 static inline void set_hard_smp_processor_id(int cpu, int phys)
 142 {
 143         boot_cpuid_phys = phys;
 144 }
 145 #endif /* !CONFIG_SMP */
 146 #endif /* !CONFIG_PPC64 */
 147
 148 extern int smt_enabled_at_boot;
 149
 150 extern int smp_mpic_probe(void);
 151 extern void smp_mpic_setup_cpu(int cpu);
 152 extern void smp_generic_kick_cpu(int nr);
 153
 154 extern void smp_generic_give_timebase(void);
 155 extern void smp_generic_take_timebase(void);
 156
 157 extern struct smp_ops_t *smp_ops;
 158
 159 extern void arch_send_call_function_single_ipi(int cpu);
 160 extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
 161
 162 /* Definitions relative to the secondary CPU spin loop
 163  * and entry point. Not all of them exist on both 32 and
 164  * 64-bit but defining them all here doesn't harm
 165  */
 166 extern void generic_secondary_smp_init(void);
 167 extern void generic_secondary_thread_init(void);
 168 extern unsigned long __secondary_hold_spinloop;
 169 extern unsigned long __secondary_hold_acknowledge;
 170 extern char __secondary_hold;
 171
 172 #endif /* __ASSEMBLY__ */
 173
 174 #endif /* __KERNEL__ */
 175 #endif /* _ASM_POWERPC_SMP_H) */