text: /*-
   * Copyright (c) 2001 Jake Burkholder.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * $FreeBSD: src/sys/sparc64/include/smp.h,v 1.19 2005/11/03 21:08:20 jhb Exp $
   */
  
  #ifndef	_MACHINE_SMP_H_
  #define	_MACHINE_SMP_H_
  
  #define	CPU_CLKSYNC		1
  #define	CPU_INIT		2
  #define	CPU_BOOTSTRAP		3
  
  #ifndef	LOCORE
  
  #include <machine/intr_machdep.h>
  #include <machine/tte.h>
  
  #define	IDR_BUSY	(1<<0)
  #define	IDR_NACK	(1<<1)
  
  #define	IPI_AST		PIL_AST
  #define	IPI_RENDEZVOUS	PIL_RENDEZVOUS
  #define	IPI_STOP	PIL_STOP
  
  #define	IPI_RETRIES	5000
  
  struct cpu_start_args {
  	u_int	csa_count;
  	u_int	csa_mid;
  	u_int	csa_state;
  	vm_offset_t csa_pcpu;
  	u_long	csa_tick;
  	u_long	csa_ver;
  	struct	tte csa_ttes[PCPU_PAGES];
  };
  
  struct ipi_cache_args {
  	u_int	ica_mask;
  	vm_paddr_t ica_pa;
  };
  
  struct ipi_tlb_args {
  	u_int	ita_mask;
  	struct	pmap *ita_pmap;
  	u_long	ita_start;
  	u_long	ita_end;
  };
  #define	ita_va	ita_start
  
  struct pcpu;
  
  extern struct pcb stoppcbs[];
  
  void	cpu_mp_bootstrap(struct pcpu *pc);
  void	cpu_mp_shutdown(void);
  
  void	cpu_ipi_selected(u_int cpus, u_long d0, u_long d1, u_long d2);
  void	cpu_ipi_send(u_int mid, u_long d0, u_long d1, u_long d2);
  
  void	ipi_selected(u_int cpus, u_int ipi);
  void	ipi_all(u_int ipi);
  void	ipi_all_but_self(u_int ipi);
  
  vm_offset_t mp_tramp_alloc(void);
  
  extern	struct mtx ipi_mtx;
  extern	struct ipi_cache_args ipi_cache_args;
  extern	struct ipi_tlb_args ipi_tlb_args;
  
  extern	vm_offset_t mp_tramp;
  extern	char *mp_tramp_code;
  extern	u_long mp_tramp_code_len;
  extern	u_long mp_tramp_tlb_slots;
  extern	u_long mp_tramp_func;
  
  extern	void mp_startup(void);
  
  extern	char tl_ipi_cheetah_dcache_page_inval[];
  extern	char tl_ipi_spitfire_dcache_page_inval[];
  extern	char tl_ipi_spitfire_icache_page_inval[];
  
  extern	char tl_ipi_level[];
  extern	char tl_ipi_tlb_context_demap[];
  extern	char tl_ipi_tlb_page_demap[];
  extern	char tl_ipi_tlb_range_demap[];
  
  #ifdef SMP
  
  #if defined(_MACHINE_PMAP_H_) && defined(_SYS_MUTEX_H_)
  
  static __inline void *
  ipi_dcache_page_inval(void *func, vm_paddr_t pa)
  {
  	struct ipi_cache_args *ica;
  
  	if (smp_cpus == 1)
  		return (NULL);
  	ica = &ipi_cache_args;
  	mtx_lock_spin(&ipi_mtx);
  	ica->ica_mask = all_cpus;
  	ica->ica_pa = pa;
  	cpu_ipi_selected(PCPU_GET(other_cpus), 0, (u_long)func, (u_long)ica);
  	return (&ica->ica_mask);
  }
  
  static __inline void *
  ipi_icache_page_inval(void *func, vm_paddr_t pa)
  {
  	struct ipi_cache_args *ica;
  
  	if (smp_cpus == 1)
  		return (NULL);
  	ica = &ipi_cache_args;
  	mtx_lock_spin(&ipi_mtx);
  	ica->ica_mask = all_cpus;
  	ica->ica_pa = pa;
  	cpu_ipi_selected(PCPU_GET(other_cpus), 0, (u_long)func, (u_long)ica);
  	return (&ica->ica_mask);
  }
  
  static __inline void *
  ipi_tlb_context_demap(struct pmap *pm)
  {
  	struct ipi_tlb_args *ita;
  	u_int cpus;
  
  	if (smp_cpus == 1)
  		return (NULL);
  	if ((cpus = (pm->pm_active & PCPU_GET(other_cpus))) == 0)
  		return (NULL);
  	ita = &ipi_tlb_args;
  	mtx_lock_spin(&ipi_mtx);
  	ita->ita_mask = cpus | PCPU_GET(cpumask);
  	ita->ita_pmap = pm;
  	cpu_ipi_selected(cpus, 0, (u_long)tl_ipi_tlb_context_demap,
  	    (u_long)ita);
  	return (&ita->ita_mask);
  }
  
  static __inline void *
  ipi_tlb_page_demap(struct pmap *pm, vm_offset_t va)
  {
  	struct ipi_tlb_args *ita;
  	u_int cpus;
  
  	if (smp_cpus == 1)
  		return (NULL);
  	if ((cpus = (pm->pm_active & PCPU_GET(other_cpus))) == 0)
  		return (NULL);
  	ita = &ipi_tlb_args;
  	mtx_lock_spin(&ipi_mtx);
  	ita->ita_mask = cpus | PCPU_GET(cpumask);
  	ita->ita_pmap = pm;
  	ita->ita_va = va;
  	cpu_ipi_selected(cpus, 0, (u_long)tl_ipi_tlb_page_demap, (u_long)ita);
  	return (&ita->ita_mask);
  }
  
  static __inline void *
  ipi_tlb_range_demap(struct pmap *pm, vm_offset_t start, vm_offset_t end)
  {
  	struct ipi_tlb_args *ita;
  	u_int cpus;
  
  	if (smp_cpus == 1)
  		return (NULL);
  	if ((cpus = (pm->pm_active & PCPU_GET(other_cpus))) == 0)
  		return (NULL);
  	ita = &ipi_tlb_args;
  	mtx_lock_spin(&ipi_mtx);
  	ita->ita_mask = cpus | PCPU_GET(cpumask);
  	ita->ita_pmap = pm;
  	ita->ita_start = start;
  	ita->ita_end = end;
  	cpu_ipi_selected(cpus, 0, (u_long)tl_ipi_tlb_range_demap, (u_long)ita);
  	return (&ita->ita_mask);
  }
  
  static __inline void
  ipi_wait(void *cookie)
  {
  	volatile u_int *mask;
  
  	if ((mask = cookie) != NULL) {
  		atomic_clear_int(mask, PCPU_GET(cpumask));
  		while (*mask != 0)
  			;
  		mtx_unlock_spin(&ipi_mtx);
  	}
  }
  
  #endif /* _MACHINE_PMAP_H_ && _SYS_MUTEX_H_ */
  
  #else
  
  static __inline void *
  ipi_dcache_page_inval(void *func, vm_paddr_t pa)
  {
  	return (NULL);
  }
  
  static __inline void *
  ipi_icache_page_inval(void *func, vm_paddr_t pa)
  {
  	return (NULL);
  }
  
  static __inline void *
  ipi_tlb_context_demap(struct pmap *pm)
  {
  	return (NULL);
  }
  
  static __inline void *
  ipi_tlb_page_demap(struct pmap *pm, vm_offset_t va)
  {
  	return (NULL);
  }
  
  static __inline void *
  ipi_tlb_range_demap(struct pmap *pm, vm_offset_t start, vm_offset_t end)
  {
  	return (NULL);
  }
  
  static __inline void
  ipi_wait(void *cookie)
  {
  }
  
  #endif /* SMP */
  
  #endif /* !LOCORE */
  
  #endif /* !_MACHINE_SMP_H_ */
  