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Linux/arch/ia64/include/asm/cacheflush.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef _ASM_IA64_CACHEFLUSH_H
  3 #define _ASM_IA64_CACHEFLUSH_H
  4 
  5 /*
  6  * Copyright (C) 2002 Hewlett-Packard Co
  7  *      David Mosberger-Tang <davidm@hpl.hp.com>
  8  */
  9 
 10 #include <linux/page-flags.h>
 11 #include <linux/bitops.h>
 12 
 13 #include <asm/page.h>
 14 
 15 /*
 16  * Cache flushing routines.  This is the kind of stuff that can be very expensive, so try
 17  * to avoid them whenever possible.
 18  */
 19 
 20 #define flush_cache_all()                       do { } while (0)
 21 #define flush_cache_mm(mm)                      do { } while (0)
 22 #define flush_cache_dup_mm(mm)                  do { } while (0)
 23 #define flush_cache_range(vma, start, end)      do { } while (0)
 24 #define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
 25 #define flush_icache_page(vma,page)             do { } while (0)
 26 #define flush_cache_vmap(start, end)            do { } while (0)
 27 #define flush_cache_vunmap(start, end)          do { } while (0)
 28 
 29 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1
 30 #define flush_dcache_page(page)                 \
 31 do {                                            \
 32         clear_bit(PG_arch_1, &(page)->flags);   \
 33 } while (0)
 34 
 35 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
 36 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
 37 
 38 extern void flush_icache_range (unsigned long start, unsigned long end);
 39 extern void clflush_cache_range(void *addr, int size);
 40 
 41 
 42 #define flush_icache_user_range(vma, page, user_addr, len)                                      \
 43 do {                                                                                            \
 44         unsigned long _addr = (unsigned long) page_address(page) + ((user_addr) & ~PAGE_MASK);  \
 45         flush_icache_range(_addr, _addr + (len));                                               \
 46 } while (0)
 47 
 48 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
 49 do { memcpy(dst, src, len); \
 50      flush_icache_user_range(vma, page, vaddr, len); \
 51 } while (0)
 52 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
 53         memcpy(dst, src, len)
 54 
 55 #endif /* _ASM_IA64_CACHEFLUSH_H */
 56 

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