include/asm-ppc64/smp.h

   1 /*
   2  * smp.h: PPC64 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 #ifdef __KERNEL__
  17 #ifndef _PPC64_SMP_H
  18 #define _PPC64_SMP_H
  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 #include <asm/paca.h>
  28
  29 extern int boot_cpuid;
  30 extern int boot_cpuid_phys;
  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 #define raw_smp_processor_id()  (get_paca()->paca_index)
  49 #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  50
  51 extern cpumask_t cpu_sibling_map[NR_CPUS];
  52
  53 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
  54  *
  55  * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
  56  * in /proc/interrupts will be wrong!!! --Troy */
  57 #define PPC_MSG_CALL_FUNCTION   0
  58 #define PPC_MSG_RESCHEDULE      1
  59 /* This is unused now */
  60 #if 0
  61 #define PPC_MSG_MIGRATE_TASK    2
  62 #endif
  63 #define PPC_MSG_DEBUGGER_BREAK  3
  64
  65 void smp_init_iSeries(void);
  66 void smp_init_pSeries(void);
  67
  68 extern int __cpu_disable(void);
  69 extern void __cpu_die(unsigned int cpu);
  70 #endif /* CONFIG_SMP */
  71
  72 #define get_hard_smp_processor_id(CPU) (paca[(CPU)].hw_cpu_id)
  73 #define set_hard_smp_processor_id(CPU, VAL) \
  74         do { (paca[(CPU)].hw_cpu_id = (VAL)); } while (0)
  75
  76 extern int smt_enabled_at_boot;
  77
  78 extern int smp_mpic_probe(void);
  79 extern void smp_mpic_setup_cpu(int cpu);
  80 extern void smp_mpic_message_pass(int target, int msg);
  81 extern void smp_generic_kick_cpu(int nr);
  82
  83 extern void smp_generic_give_timebase(void);
  84 extern void smp_generic_take_timebase(void);
  85
  86 extern struct smp_ops_t *smp_ops;
  87
  88 #ifdef CONFIG_PPC_PSERIES
  89 void vpa_init(int cpu);
  90 #else
  91 static inline void vpa_init(int cpu)
  92 {
  93 }
  94 #endif /* CONFIG_PPC_PSERIES */
  95
  96 #endif /* __ASSEMBLY__ */
  97
  98 #endif /* !(_PPC64_SMP_H) */
  99 #endif /* __KERNEL__ */