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kernel/linux-rt-4.4.41/arch/mn10300/mm/cache-smp-flush.c 4.48 KB
5113f6f70   김현기   kernel add
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  /* Functions for global dcache flush when writeback caching in SMP
   *
   * 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.
   */
  #include <linux/mm.h>
  #include <asm/cacheflush.h>
  #include "cache-smp.h"
  
  /**
   * mn10300_dcache_flush - Globally flush data cache
   *
   * Flush the data cache on all CPUs.
   */
  void mn10300_dcache_flush(void)
  {
  	unsigned long flags;
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush();
  	smp_cache_call(SMP_DCACHE_FLUSH, 0, 0);
  	smp_unlock_cache(flags);
  }
  
  /**
   * mn10300_dcache_flush_page - Globally flush a page of data cache
   * @start: The address of the page of memory to be flushed.
   *
   * Flush a range of addresses in the data cache on all CPUs covering
   * the page that includes the given address.
   */
  void mn10300_dcache_flush_page(unsigned long start)
  {
  	unsigned long flags;
  
  	start &= ~(PAGE_SIZE-1);
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush_page(start);
  	smp_cache_call(SMP_DCACHE_FLUSH_RANGE, start, start + PAGE_SIZE);
  	smp_unlock_cache(flags);
  }
  
  /**
   * mn10300_dcache_flush_range - Globally flush range of data cache
   * @start: The start address of the region to be flushed.
   * @end: The end address of the region to be flushed.
   *
   * Flush a range of addresses in the data cache on all CPUs, between start and
   * end-1 inclusive.
   */
  void mn10300_dcache_flush_range(unsigned long start, unsigned long end)
  {
  	unsigned long flags;
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush_range(start, end);
  	smp_cache_call(SMP_DCACHE_FLUSH_RANGE, start, end);
  	smp_unlock_cache(flags);
  }
  
  /**
   * mn10300_dcache_flush_range2 - Globally flush range of data cache
   * @start: The start address of the region to be flushed.
   * @size: The size of the region to be flushed.
   *
   * Flush a range of addresses in the data cache on all CPUs, between start and
   * start+size-1 inclusive.
   */
  void mn10300_dcache_flush_range2(unsigned long start, unsigned long size)
  {
  	unsigned long flags;
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush_range2(start, size);
  	smp_cache_call(SMP_DCACHE_FLUSH_RANGE, start, start + size);
  	smp_unlock_cache(flags);
  }
  
  /**
   * mn10300_dcache_flush_inv - Globally flush and invalidate data cache
   *
   * Flush and invalidate the data cache on all CPUs.
   */
  void mn10300_dcache_flush_inv(void)
  {
  	unsigned long flags;
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush_inv();
  	smp_cache_call(SMP_DCACHE_FLUSH_INV, 0, 0);
  	smp_unlock_cache(flags);
  }
  
  /**
   * mn10300_dcache_flush_inv_page - Globally flush and invalidate a page of data
   *	cache
   * @start: The address of the page of memory to be flushed and invalidated.
   *
   * Flush and invalidate a range of addresses in the data cache on all CPUs
   * covering the page that includes the given address.
   */
  void mn10300_dcache_flush_inv_page(unsigned long start)
  {
  	unsigned long flags;
  
  	start &= ~(PAGE_SIZE-1);
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush_inv_page(start);
  	smp_cache_call(SMP_DCACHE_FLUSH_INV_RANGE, start, start + PAGE_SIZE);
  	smp_unlock_cache(flags);
  }
  
  /**
   * mn10300_dcache_flush_inv_range - Globally flush and invalidate range of data
   *	cache
   * @start: The start address of the region to be flushed and invalidated.
   * @end: The end address of the region to be flushed and invalidated.
   *
   * Flush and invalidate a range of addresses in the data cache on all CPUs,
   * between start and end-1 inclusive.
   */
  void mn10300_dcache_flush_inv_range(unsigned long start, unsigned long end)
  {
  	unsigned long flags;
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush_inv_range(start, end);
  	smp_cache_call(SMP_DCACHE_FLUSH_INV_RANGE, start, end);
  	smp_unlock_cache(flags);
  }
  
  /**
   * mn10300_dcache_flush_inv_range2 - Globally flush and invalidate range of data
   *	cache
   * @start: The start address of the region to be flushed and invalidated.
   * @size: The size of the region to be flushed and invalidated.
   *
   * Flush and invalidate a range of addresses in the data cache on all CPUs,
   * between start and start+size-1 inclusive.
   */
  void mn10300_dcache_flush_inv_range2(unsigned long start, unsigned long size)
  {
  	unsigned long flags;
  
  	flags = smp_lock_cache();
  	mn10300_local_dcache_flush_inv_range2(start, size);
  	smp_cache_call(SMP_DCACHE_FLUSH_INV_RANGE, start, start + size);
  	smp_unlock_cache(flags);
  }