include/asm-powerpc/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
  30 extern int boot_cpuid;
  31
  32 extern void cpu_die(void);
  33
  34 #ifdef CONFIG_SMP
  35
  36 extern void smp_send_debugger_break(int cpu);
  37 struct pt_regs;
  38 extern void smp_message_recv(int, struct pt_regs *);
  39
  40 #ifdef CONFIG_HOTPLUG_CPU
  41 extern void fixup_irqs(cpumask_t map);
  42 int generic_cpu_disable(void);
  43 int generic_cpu_enable(unsigned int cpu);
  44 void generic_cpu_die(unsigned int cpu);
  45 void generic_mach_cpu_die(void);
  46 #endif
  47
  48 #ifdef CONFIG_PPC64
  49 #define raw_smp_processor_id()  (get_paca()->paca_index)
  50 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  51 #else
  52 /* 32-bit */
  53 extern int smp_hw_index[];
  54
  55 #define raw_smp_processor_id()  (current_thread_info()->cpu)
  56 #define hard_smp_processor_id()         (smp_hw_index[smp_processor_id()])
  57 #define get_hard_smp_processor_id(cpu)  (smp_hw_index[(cpu)])
  58 #define set_hard_smp_processor_id(cpu, phys)\
  59                                         (smp_hw_index[(cpu)] = (phys))
  60 #endif
  61
  62 extern cpumask_t cpu_sibling_map[NR_CPUS];
  63
  64 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
  65  *
  66  * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
  67  * in /proc/interrupts will be wrong!!! --Troy */
  68 #define PPC_MSG_CALL_FUNCTION   0
  69 #define PPC_MSG_RESCHEDULE      1
  70 /* This is unused now */
  71 #if 0
  72 #define PPC_MSG_MIGRATE_TASK    2
  73 #endif
  74 #define PPC_MSG_DEBUGGER_BREAK  3
  75
  76 void smp_init_iSeries(void);
  77 void smp_init_pSeries(void);
  78 void smp_init_cell(void);
  79 void smp_setup_cpu_maps(void);
  80
  81 extern int __cpu_disable(void);
  82 extern void __cpu_die(unsigned int cpu);
  83
  84 #else
  85 /* for UP */
  86 #define smp_setup_cpu_maps()
  87
  88 #endif /* CONFIG_SMP */
  89
  90 #ifdef CONFIG_PPC64
  91 #define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
  92 #define set_hard_smp_processor_id(CPU, VAL) \
  93         do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
  94
  95 extern void smp_release_cpus(void);
  96
  97 #else
  98 /* 32-bit */
  99 #ifndef CONFIG_SMP
 100 extern int boot_cpuid_phys;
 101 #define get_hard_smp_processor_id(cpu)  boot_cpuid_phys
 102 #define set_hard_smp_processor_id(cpu, phys)
 103 #endif
 104 #endif
 105
 106 extern int smt_enabled_at_boot;
 107
 108 extern int smp_mpic_probe(void);
 109 extern void smp_mpic_setup_cpu(int cpu);
 110 extern void smp_generic_kick_cpu(int nr);
 111
 112 extern void smp_generic_give_timebase(void);
 113 extern void smp_generic_take_timebase(void);
 114
 115 extern struct smp_ops_t *smp_ops;
 116
 117 #endif /* __ASSEMBLY__ */
 118
 119 #endif /* __KERNEL__ */
 120 #endif /* _ASM_POWERPC_SMP_H) */