arch/arm/mm/mm.h

   1 #ifdef CONFIG_MMU
   2
   3 /* the upper-most page table pointer */
   4 extern pmd_t *top_pmd;
   5
   6 #define TOP_PTE(x)      pte_offset_kernel(top_pmd, x)
   7
   8 static inline pmd_t *pmd_off_k(unsigned long virt)
   9 {
  10         return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
  11 }
  12
  13 struct mem_type {
  14         pteval_t prot_pte;
  15         pmdval_t prot_l1;
  16         pmdval_t prot_sect;
  17         unsigned int domain;
  18 };
  19
  20 const struct mem_type *get_mem_type(unsigned int type);
  21
  22 extern void __flush_dcache_page(struct address_space *mapping, struct page *page);
  23
  24 /*
  25  * ARM specific vm_struct->flags bits.
  26  */
  27
  28 /* (super)section-mapped I/O regions used by ioremap()/iounmap() */
  29 #define VM_ARM_SECTION_MAPPING  0x80000000
  30
  31 /* permanent static mappings from iotable_init() */
  32 #define VM_ARM_STATIC_MAPPING   0x40000000
  33
  34 /* mapping type (attributes) for permanent static mappings */
  35 #define VM_ARM_MTYPE(mt)                ((mt) << 20)
  36 #define VM_ARM_MTYPE_MASK       (0x1f << 20)
  37
  38 #endif
  39
  40 #ifdef CONFIG_ZONE_DMA
  41 extern u32 arm_dma_limit;
  42 #else
  43 #define arm_dma_limit ((u32)~0)
  44 #endif
  45
  46 void __init bootmem_init(void);
  47 void arm_mm_memblock_reserve(void);