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/config.h>
  21 #include <linux/threads.h>
  22 #include <linux/cpumask.h>
  23 #include <linux/kernel.h>
  24
  25 #ifndef __ASSEMBLY__
  26
  27 #ifdef CONFIG_PPC64
  28 #include <asm/paca.h>
  29 #endif
  30
  31 extern int boot_cpuid;
  32 extern int boot_cpuid_phys;
  33
  34 extern void cpu_die(void);
  35
  36 #ifdef CONFIG_SMP
  37
  38 extern void smp_send_debugger_break(int cpu);
  39 struct pt_regs;
  40 extern void smp_message_recv(int, struct pt_regs *);
  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()  (get_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 #define get_hard_smp_processor_id(cpu)  (smp_hw_index[(cpu)])
  60 #define set_hard_smp_processor_id(cpu, phys)\
  61                                         (smp_hw_index[(cpu)] = (phys))
  62 #endif
  63
  64 extern cpumask_t cpu_sibling_map[NR_CPUS];
  65
  66 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
  67  *
  68  * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
  69  * in /proc/interrupts will be wrong!!! --Troy */
  70 #define PPC_MSG_CALL_FUNCTION   0
  71 #define PPC_MSG_RESCHEDULE      1
  72 /* This is unused now */
  73 #if 0
  74 #define PPC_MSG_MIGRATE_TASK    2
  75 #endif
  76 #define PPC_MSG_DEBUGGER_BREAK  3
  77
  78 void smp_init_iSeries(void);
  79 void smp_init_pSeries(void);
  80 void smp_init_cell(void);
  81 void smp_setup_cpu_maps(void);
  82
  83 extern int __cpu_disable(void);
  84 extern void __cpu_die(unsigned int cpu);
  85
  86 #else
  87 /* for UP */
  88 #define smp_setup_cpu_maps()
  89
  90 #endif /* CONFIG_SMP */
  91
  92 #ifdef CONFIG_PPC64
  93 #define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
  94 #define set_hard_smp_processor_id(CPU, VAL) \
  95         do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
  96
  97 extern void smp_release_cpus(void);
  98
  99 #else
 100 /* 32-bit */
 101 #ifndef CONFIG_SMP
 102 #define get_hard_smp_processor_id(cpu)  boot_cpuid_phys
 103 #define set_hard_smp_processor_id(cpu, phys)
 104 #endif
 105 #endif
 106
 107 extern int smt_enabled_at_boot;
 108
 109 extern int smp_mpic_probe(void);
 110 extern void smp_mpic_setup_cpu(int cpu);
 111 extern void smp_generic_kick_cpu(int nr);
 112
 113 extern void smp_generic_give_timebase(void);
 114 extern void smp_generic_take_timebase(void);
 115
 116 extern struct smp_ops_t *smp_ops;
 117
 118 #endif /* __ASSEMBLY__ */
 119
 120 #endif /* __KERNEL__ */
 121 #endif /* _ASM_POWERPC_SMP_H) */