arch/arm/include/asm/highmem.h

   1 #ifndef _ASM_HIGHMEM_H
   2 #define _ASM_HIGHMEM_H
   3
   4 #include <asm/kmap_types.h>
   5
   6 #define PKMAP_BASE              (PAGE_OFFSET - PMD_SIZE)
   7 #define LAST_PKMAP              PTRS_PER_PTE
   8 #define LAST_PKMAP_MASK         (LAST_PKMAP - 1)
   9 #define PKMAP_NR(virt)          (((virt) - PKMAP_BASE) >> PAGE_SHIFT)
  10 #define PKMAP_ADDR(nr)          (PKMAP_BASE + ((nr) << PAGE_SHIFT))
  11
  12 #define kmap_prot               PAGE_KERNEL
  13
  14 #define flush_cache_kmaps()     flush_cache_all()
  15
  16 extern pte_t *pkmap_page_table;
  17
  18 #define ARCH_NEEDS_KMAP_HIGH_GET
  19
  20 extern void *kmap_high(struct page *page);
  21 extern void *kmap_high_get(struct page *page);
  22 extern void kunmap_high(struct page *page);
  23
  24 extern void *kmap(struct page *page);
  25 extern void kunmap(struct page *page);
  26 extern void *kmap_atomic(struct page *page, enum km_type type);
  27 extern void kunmap_atomic(void *kvaddr, enum km_type type);
  28 extern void *kmap_atomic_pfn(unsigned long pfn, enum km_type type);
  29 extern struct page *kmap_atomic_to_page(const void *ptr);
  30
  31 #endif