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Linux/include/asm-ia64/cacheflush.h

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  1 #ifndef _ASM_IA64_CACHEFLUSH_H
  2 #define _ASM_IA64_CACHEFLUSH_H
  3 
  4 /*
  5  * Copyright (C) 2002 Hewlett-Packard Co
  6  *      David Mosberger-Tang <davidm@hpl.hp.com>
  7  */
  8 
  9 #include <linux/page-flags.h>
 10 
 11 #include <asm/bitops.h>
 12 #include <asm/page.h>
 13 
 14 /*
 15  * Cache flushing routines.  This is the kind of stuff that can be very expensive, so try
 16  * to avoid them whenever possible.
 17  */
 18 
 19 #define flush_cache_all()                       do { } while (0)
 20 #define flush_cache_mm(mm)                      do { } while (0)
 21 #define flush_cache_range(vma, start, end)      do { } while (0)
 22 #define flush_cache_page(vma, vmaddr)           do { } while (0)
 23 #define flush_icache_page(vma,page)             do { } while (0)
 24 #define flush_cache_vmap(start, end)            do { } while (0)
 25 #define flush_cache_vunmap(start, end)          do { } while (0)
 26 
 27 #define flush_dcache_page(page)                 \
 28 do {                                            \
 29         clear_bit(PG_arch_1, &(page)->flags);   \
 30 } while (0)
 31 
 32 extern void flush_icache_range (unsigned long start, unsigned long end);
 33 
 34 #define flush_icache_user_range(vma, page, user_addr, len)                                      \
 35 do {                                                                                            \
 36         unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK);  \
 37         flush_icache_range(_addr, _addr + (len));                                               \
 38 } while (0)
 39 
 40 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
 41 do { memcpy(dst, src, len); \
 42      flush_icache_user_range(vma, page, vaddr, len); \
 43 } while (0)
 44 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 45         memcpy(dst, src, len)
 46 
 47 #endif /* _ASM_IA64_CACHEFLUSH_H */
 48 

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