text: /*
   * This file is subject to the terms and conditions of the GNU General
   * Public License.  See the file "COPYING" in the main directory of this
   * archive for more details.
   *
   * Copyright (C) 2000 - 2001 by Kanoj Sarcar (kanoj@sgi.com)
   * Copyright (C) 2000 - 2001 by Silicon Graphics, Inc.
   * Copyright (C) 2000, 2001, 2002 Ralf Baechle
   * Copyright (C) 2000, 2001 Broadcom Corporation
   */
  #ifndef __ASM_SMP_H
  #define __ASM_SMP_H
  
  #include <linux/bitops.h>
  #include <linux/linkage.h>
  #include <linux/smp.h>
  #include <linux/threads.h>
  #include <linux/cpumask.h>
  
  #include <linux/atomic.h>
  #include <asm/smp-ops.h>
  
  extern int smp_num_siblings;
  extern cpumask_t cpu_sibling_map[];
  extern cpumask_t cpu_core_map[];
  extern cpumask_t cpu_foreign_map[];
  
  #define raw_smp_processor_id() (current_thread_info()->cpu)
  
  /* Map from cpu id to sequential logical cpu number.  This will only
     not be idempotent when cpus failed to come on-line.	*/
  extern int __cpu_number_map[NR_CPUS];
  #define cpu_number_map(cpu)  __cpu_number_map[cpu]
  
  /* The reverse map from sequential logical cpu number to cpu id.  */
  extern int __cpu_logical_map[NR_CPUS];
  #define cpu_logical_map(cpu)  __cpu_logical_map[cpu]
  
  #define NO_PROC_ID	(-1)
  
  #define SMP_RESCHEDULE_YOURSELF 0x1	/* XXX braindead */
  #define SMP_CALL_FUNCTION	0x2
  /* Octeon - Tell another core to flush its icache */
  #define SMP_ICACHE_FLUSH	0x4
  /* Used by kexec crashdump to save all cpu's state */
  #define SMP_DUMP		0x8
  #define SMP_ASK_C0COUNT		0x10
  
  extern cpumask_t cpu_callin_map;
  
  /* Mask of CPUs which are currently definitely operating coherently */
  extern cpumask_t cpu_coherent_mask;
  
  extern void asmlinkage smp_bootstrap(void);
  
  extern void calculate_cpu_foreign_map(void);
  
  /*
   * this function sends a 'reschedule' IPI to another CPU.
   * it goes straight through and wastes no time serializing
   * anything. Worst case is that we lose a reschedule ...
   */
  static inline void smp_send_reschedule(int cpu)
  {
  	extern struct plat_smp_ops *mp_ops;	/* private */
  
  	mp_ops->send_ipi_single(cpu, SMP_RESCHEDULE_YOURSELF);
  }
  
  #ifdef CONFIG_HOTPLUG_CPU
  static inline int __cpu_disable(void)
  {
  	extern struct plat_smp_ops *mp_ops;	/* private */
  
  	return mp_ops->cpu_disable();
  }
  
  static inline void __cpu_die(unsigned int cpu)
  {
  	extern struct plat_smp_ops *mp_ops;	/* private */
  
  	mp_ops->cpu_die(cpu);
  }
  
  extern void play_dead(void);
  #endif
  
  /*
   * This function will set up the necessary IPIs for Linux to communicate
   * with the CPUs in mask.
   * Return 0 on success.
   */
  int mips_smp_ipi_allocate(const struct cpumask *mask);
  
  /*
   * This function will free up IPIs allocated with mips_smp_ipi_allocate to the
   * CPUs in mask, which must be a subset of the IPIs that have been configured.
   * Return 0 on success.
   */
  int mips_smp_ipi_free(const struct cpumask *mask);
  
  static inline void arch_send_call_function_single_ipi(int cpu)
  {
  	extern struct plat_smp_ops *mp_ops;	/* private */
  
  	mp_ops->send_ipi_mask(cpumask_of(cpu), SMP_CALL_FUNCTION);
  }
  
  static inline void arch_send_call_function_ipi_mask(const struct cpumask *mask)
  {
  	extern struct plat_smp_ops *mp_ops;	/* private */
  
  	mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
  }
  
  #if defined(CONFIG_KEXEC)
  extern void (*dump_ipi_function_ptr)(void *);
  void dump_send_ipi(void (*dump_ipi_callback)(void *));
  #endif
  #endif /* __ASM_SMP_H */
  