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#include <linux/mm.h>

/* Caches aren't brain-dead on the Alpha. */
#define flush_cache_all()                 do { } while (0)
#define flush_cache_mm(mm)                do { } while (0)
#define flush_cache_dup_mm(mm)                  do { } while (0)
#define flush_cache_range(vma, start, end)      do { } while (0)
#define flush_cache_page(vma, vmaddr, pfn)      do { } while (0)
#define flush_dcache_page(page)                 do { } while (0)
#define flush_dcache_mmap_lock(mapping)         do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
#define flush_cache_vmap(start, end)            do { } while (0)
#define flush_cache_vunmap(start, end)          do { } while (0)

/* Note that the following two definitions are _highly_ dependent
   on the contexts in which they are used in the kernel.  I personally
   think it is criminal how loosely defined these macros are.  */

/* We need to flush the kernel's icache after loading modules.  The
   only other use of this macro is in load_aout_interp which is not
   used on Alpha. 

   Note that this definition should *not* be used for userspace
   icache flushing.  While functional, it is _way_ overkill.  The
   icache is tagged with ASNs and it suffices to allocate a new ASN
   for the process.  */
#ifndef CONFIG_SMP
#define flush_icache_range(start, end)          imb()
#define flush_icache_range(start, end)          smp_imb()
extern void smp_imb(void);

/* We need to flush the userspace icache after setting breakpoints in

   Instead of indiscriminately using imb, take advantage of the fact
   that icache entries are tagged with the ASN and load a new mm context.  */
/* ??? Ought to use this in arch/alpha/kernel/signal.c too.  */

#ifndef CONFIG_SMP
extern void __load_new_mm_context(struct mm_struct *);
static inline void
flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
                  unsigned long addr, int len)
      if (vma->vm_flags & VM_EXEC) {
            struct mm_struct *mm = vma->vm_mm;
            if (current->active_mm == mm)
                  mm->context[smp_processor_id()] = 0;
extern void flush_icache_user_range(struct vm_area_struct *vma,
            struct page *page, unsigned long addr, int len);

/* This is used only in do_no_page and do_swap_page.  */
#define flush_icache_page(vma, page) \
  flush_icache_user_range((vma), (page), 0, 0)

#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
do { memcpy(dst, src, len); \
     flush_icache_user_range(vma, page, vaddr, len); \
} while (0)
#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
      memcpy(dst, src, len)

#endif /* _ALPHA_CACHEFLUSH_H */

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