text: /* 
   * smp.h: PowerPC-specific SMP code.
   *
   * Original was a copy of sparc smp.h.  Now heavily modified
   * for PPC.
   *
   * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
   * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #ifndef _ASM_POWERPC_SMP_H
  #define _ASM_POWERPC_SMP_H
  #ifdef __KERNEL__
  
  #include <linux/threads.h>
  #include <linux/cpumask.h>
  #include <linux/kernel.h>
  
  #ifndef __ASSEMBLY__
  
  #ifdef CONFIG_PPC64
  #include <asm/paca.h>
  #endif
  #include <asm/percpu.h>
  
  extern int boot_cpuid;
  
  extern void cpu_die(void);
  
  #ifdef CONFIG_SMP
  
  extern void smp_send_debugger_break(int cpu);
  extern void smp_message_recv(int);
  
  DECLARE_PER_CPU(unsigned int, cpu_pvr);
  
  #ifdef CONFIG_HOTPLUG_CPU
  extern void fixup_irqs(const struct cpumask *map);
  int generic_cpu_disable(void);
  int generic_cpu_enable(unsigned int cpu);
  void generic_cpu_die(unsigned int cpu);
  void generic_mach_cpu_die(void);
  #endif
  
  #ifdef CONFIG_PPC64
  #define raw_smp_processor_id()	(local_paca->paca_index)
  #define hard_smp_processor_id() (get_paca()->hw_cpu_id)
  #else
  /* 32-bit */
  extern int smp_hw_index[];
  
  #define raw_smp_processor_id()	(current_thread_info()->cpu)
  #define hard_smp_processor_id() 	(smp_hw_index[smp_processor_id()])
  
  static inline int get_hard_smp_processor_id(int cpu)
  {
  	return smp_hw_index[cpu];
  }
  
  static inline void set_hard_smp_processor_id(int cpu, int phys)
  {
  	smp_hw_index[cpu] = phys;
  }
  #endif
  
  DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
  DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
  
  static inline struct cpumask *cpu_sibling_mask(int cpu)
  {
  	return per_cpu(cpu_sibling_map, cpu);
  }
  
  static inline struct cpumask *cpu_core_mask(int cpu)
  {
  	return per_cpu(cpu_core_map, cpu);
  }
  
  extern int cpu_to_core_id(int cpu);
  
  /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
   *
   * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
   * in /proc/interrupts will be wrong!!! --Troy */
  #define PPC_MSG_CALL_FUNCTION   0
  #define PPC_MSG_RESCHEDULE      1
  #define PPC_MSG_CALL_FUNC_SINGLE	2
  #define PPC_MSG_DEBUGGER_BREAK  3
  
  /*
   * irq controllers that have dedicated ipis per message and don't
   * need additional code in the action handler may use this
   */
  extern int smp_request_message_ipi(int virq, int message);
  extern const char *smp_ipi_name[];
  
  void smp_init_iSeries(void);
  void smp_init_pSeries(void);
  void smp_init_cell(void);
  void smp_init_celleb(void);
  void smp_setup_cpu_maps(void);
  
  extern int __cpu_disable(void);
  extern void __cpu_die(unsigned int cpu);
  
  #else
  /* for UP */
  #define hard_smp_processor_id()		get_hard_smp_processor_id(0)
  #define smp_setup_cpu_maps()
  
  #endif /* CONFIG_SMP */
  
  #ifdef CONFIG_PPC64
  static inline int get_hard_smp_processor_id(int cpu)
  {
  	return paca[cpu].hw_cpu_id;
  }
  
  static inline void set_hard_smp_processor_id(int cpu, int phys)
  {
  	paca[cpu].hw_cpu_id = phys;
  }
  
  extern void smp_release_cpus(void);
  
  #else
  /* 32-bit */
  #ifndef CONFIG_SMP
  extern int boot_cpuid_phys;
  static inline int get_hard_smp_processor_id(int cpu)
  {
  	return boot_cpuid_phys;
  }
  
  static inline void set_hard_smp_processor_id(int cpu, int phys)
  {
  	boot_cpuid_phys = phys;
  }
  #endif /* !CONFIG_SMP */
  #endif /* !CONFIG_PPC64 */
  
  extern int smt_enabled_at_boot;
  
  extern int smp_mpic_probe(void);
  extern void smp_mpic_setup_cpu(int cpu);
  extern void smp_generic_kick_cpu(int nr);
  
  extern void smp_generic_give_timebase(void);
  extern void smp_generic_take_timebase(void);
  
  extern struct smp_ops_t *smp_ops;
  
  extern void arch_send_call_function_single_ipi(int cpu);
  extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
  
  /* Definitions relative to the secondary CPU spin loop
   * and entry point. Not all of them exist on both 32 and
   * 64-bit but defining them all here doesn't harm
   */
  extern void generic_secondary_smp_init(void);
  extern void generic_secondary_thread_init(void);
  extern unsigned long __secondary_hold_spinloop;
  extern unsigned long __secondary_hold_acknowledge;
  extern char __secondary_hold;
  
  #endif /* __ASSEMBLY__ */
  
  #endif /* __KERNEL__ */
  #endif /* _ASM_POWERPC_SMP_H) */
  