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, pvr);
  41
  42 #ifdef CONFIG_HOTPLUG_CPU
  43 extern void fixup_irqs(cpumask_t 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_t, cpu_sibling_map);
  72 DECLARE_PER_CPU(cpumask_t, cpu_core_map);
  73 extern int cpu_to_core_id(int cpu);
  74
  75 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
  76  *
  77  * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
  78  * in /proc/interrupts will be wrong!!! --Troy */
  79 #define PPC_MSG_CALL_FUNCTION   0
  80 #define PPC_MSG_RESCHEDULE      1
  81 #define PPC_MSG_CALL_FUNC_SINGLE        2
  82 #define PPC_MSG_DEBUGGER_BREAK  3
  83
  84 /*
  85  * irq controllers that have dedicated ipis per message and don't
  86  * need additional code in the action handler may use this
  87  */
  88 extern int smp_request_message_ipi(int virq, int message);
  89 extern const char *smp_ipi_name[];
  90
  91 void smp_init_iSeries(void);
  92 void smp_init_pSeries(void);
  93 void smp_init_cell(void);
  94 void smp_init_celleb(void);
  95 void smp_setup_cpu_maps(void);
  96 void smp_setup_cpu_sibling_map(void);
  97
  98 extern int __cpu_disable(void);
  99 extern void __cpu_die(unsigned int cpu);
 100
 101 #else
 102 /* for UP */
 103 #define hard_smp_processor_id()         get_hard_smp_processor_id(0)
 104 #define smp_setup_cpu_maps()
 105
 106 #endif /* CONFIG_SMP */
 107
 108 #ifdef CONFIG_PPC64
 109 static inline int get_hard_smp_processor_id(int cpu)
 110 {
 111         return paca[cpu].hw_cpu_id;
 112 }
 113
 114 static inline void set_hard_smp_processor_id(int cpu, int phys)
 115 {
 116         paca[cpu].hw_cpu_id = phys;
 117 }
 118
 119 extern void smp_release_cpus(void);
 120
 121 #else
 122 /* 32-bit */
 123 #ifndef CONFIG_SMP
 124 extern int boot_cpuid_phys;
 125 static inline int get_hard_smp_processor_id(int cpu)
 126 {
 127         return boot_cpuid_phys;
 128 }
 129
 130 static inline void set_hard_smp_processor_id(int cpu, int phys)
 131 {
 132         boot_cpuid_phys = phys;
 133 }
 134 #endif /* !CONFIG_SMP */
 135 #endif /* !CONFIG_PPC64 */
 136
 137 extern int smt_enabled_at_boot;
 138
 139 extern int smp_mpic_probe(void);
 140 extern void smp_mpic_setup_cpu(int cpu);
 141 extern void smp_generic_kick_cpu(int nr);
 142
 143 extern void smp_generic_give_timebase(void);
 144 extern void smp_generic_take_timebase(void);
 145
 146 extern struct smp_ops_t *smp_ops;
 147
 148 extern void arch_send_call_function_single_ipi(int cpu);
 149 extern void arch_send_call_function_ipi(cpumask_t mask);
 150
 151 #endif /* __ASSEMBLY__ */
 152
 153 #endif /* __KERNEL__ */
 154 #endif /* _ASM_POWERPC_SMP_H) */