arch/mn10300/mm/cache-smp.h

   1 /* SMP caching definitions
   2  *
   3  * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11
  12
  13 /*
  14  * Operation requests for smp_cache_call().
  15  *
  16  * One of smp_icache_ops and one of smp_dcache_ops can be OR'd together.
  17  */
  18 enum smp_icache_ops {
  19         SMP_ICACHE_NOP                  = 0x0000,
  20         SMP_ICACHE_INV                  = 0x0001,
  21         SMP_ICACHE_INV_RANGE            = 0x0002,
  22 };
  23 #define SMP_ICACHE_OP_MASK              0x0003
  24
  25 enum smp_dcache_ops {
  26         SMP_DCACHE_NOP                  = 0x0000,
  27         SMP_DCACHE_INV                  = 0x0004,
  28         SMP_DCACHE_INV_RANGE            = 0x0008,
  29         SMP_DCACHE_FLUSH                = 0x000c,
  30         SMP_DCACHE_FLUSH_RANGE          = 0x0010,
  31         SMP_DCACHE_FLUSH_INV            = 0x0014,
  32         SMP_DCACHE_FLUSH_INV_RANGE      = 0x0018,
  33 };
  34 #define SMP_DCACHE_OP_MASK              0x001c
  35
  36 #define SMP_IDCACHE_INV_FLUSH           (SMP_ICACHE_INV | SMP_DCACHE_FLUSH)
  37 #define SMP_IDCACHE_INV_FLUSH_RANGE     (SMP_ICACHE_INV_RANGE | SMP_DCACHE_FLUSH_RANGE)
  38
  39 /*
  40  * cache-smp.c
  41  */
  42 #ifdef CONFIG_SMP
  43 extern spinlock_t smp_cache_lock;
  44
  45 extern void smp_cache_call(unsigned long opr_mask,
  46                            unsigned long addr, unsigned long end);
  47
  48 static inline unsigned long smp_lock_cache(void)
  49         __acquires(&smp_cache_lock)
  50 {
  51         unsigned long flags;
  52         spin_lock_irqsave(&smp_cache_lock, flags);
  53         return flags;
  54 }
  55
  56 static inline void smp_unlock_cache(unsigned long flags)
  57         __releases(&smp_cache_lock)
  58 {
  59         spin_unlock_irqrestore(&smp_cache_lock, flags);
  60 }
  61
  62 #else
  63 static inline unsigned long smp_lock_cache(void) { return 0; }
  64 static inline void smp_unlock_cache(unsigned long flags) {}
  65 static inline void smp_cache_call(unsigned long opr_mask,
  66                                   unsigned long addr, unsigned long end)
  67 {
  68 }
  69 #endif /* CONFIG_SMP */