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kernel/linux-rt-4.4.41/arch/mn10300/mm/cache-smp.h 1.81 KB
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  /* SMP caching definitions
   *
   * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public Licence
   * as published by the Free Software Foundation; either version
   * 2 of the Licence, or (at your option) any later version.
   */
  
  
  /*
   * Operation requests for smp_cache_call().
   *
   * One of smp_icache_ops and one of smp_dcache_ops can be OR'd together.
   */
  enum smp_icache_ops {
  	SMP_ICACHE_NOP			= 0x0000,
  	SMP_ICACHE_INV			= 0x0001,
  	SMP_ICACHE_INV_RANGE		= 0x0002,
  };
  #define SMP_ICACHE_OP_MASK		0x0003
  
  enum smp_dcache_ops {
  	SMP_DCACHE_NOP			= 0x0000,
  	SMP_DCACHE_INV			= 0x0004,
  	SMP_DCACHE_INV_RANGE		= 0x0008,
  	SMP_DCACHE_FLUSH		= 0x000c,
  	SMP_DCACHE_FLUSH_RANGE		= 0x0010,
  	SMP_DCACHE_FLUSH_INV		= 0x0014,
  	SMP_DCACHE_FLUSH_INV_RANGE	= 0x0018,
  };
  #define SMP_DCACHE_OP_MASK		0x001c
  
  #define	SMP_IDCACHE_INV_FLUSH		(SMP_ICACHE_INV | SMP_DCACHE_FLUSH)
  #define SMP_IDCACHE_INV_FLUSH_RANGE	(SMP_ICACHE_INV_RANGE | SMP_DCACHE_FLUSH_RANGE)
  
  /*
   * cache-smp.c
   */
  #ifdef CONFIG_SMP
  extern spinlock_t smp_cache_lock;
  
  extern void smp_cache_call(unsigned long opr_mask,
  			   unsigned long addr, unsigned long end);
  
  static inline unsigned long smp_lock_cache(void)
  	__acquires(&smp_cache_lock)
  {
  	unsigned long flags;
  	spin_lock_irqsave(&smp_cache_lock, flags);
  	return flags;
  }
  
  static inline void smp_unlock_cache(unsigned long flags)
  	__releases(&smp_cache_lock)
  {
  	spin_unlock_irqrestore(&smp_cache_lock, flags);
  }
  
  #else
  static inline unsigned long smp_lock_cache(void) { return 0; }
  static inline void smp_unlock_cache(unsigned long flags) {}
  static inline void smp_cache_call(unsigned long opr_mask,
  				  unsigned long addr, unsigned long end)
  {
  }
  #endif /* CONFIG_SMP */