LXR linux/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 */
  18enum 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
  25enum 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
  43extern spinlock_t smp_cache_lock;
  44
  45extern void smp_cache_call(unsigned long opr_mask,
  46                           unsigned long addr, unsigned long end);
  47
  48static 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
  56static 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
  63static inline unsigned long smp_lock_cache(void) { return 0; }
  64static inline void smp_unlock_cache(unsigned long flags) {}
  65static inline void smp_cache_call(unsigned long opr_mask,
  66                                  unsigned long addr, unsigned long end)
  67{
  68}
  69#endif /* CONFIG_SMP */
  70