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