-static inline int remap_area_pte(pte_t *pte, unsigned long address,
- unsigned long end, unsigned long phys_addr,
- pgprot_t prot)
-{
- unsigned long pfn;
-
- pfn = phys_addr >> PAGE_SHIFT;
- do {
- WARN_ON(!pte_none(*pte));
-
- set_pte(pte, pfn_pte(pfn, prot));
- address += PAGE_SIZE;
- pfn++;
- pte++;
- } while (address && (address < end));
-
- return 0;
-}
-
-static inline int remap_area_pmd(pmd_t *pmd, unsigned long address,
- unsigned long end, unsigned long phys_addr,
- pgprot_t prot)
-{
- unsigned long next;
-
- phys_addr -= address;
-
- do {
- pte_t *pte = pte_alloc_kernel(pmd, address);
- if (!pte)
- return -ENOMEM;
-
- next = (address + PMD_SIZE) & PMD_MASK;
- if (remap_area_pte(pte, address, next,
- address + phys_addr, prot))
- return -ENOMEM;
-
- address = next;
- pmd++;
- } while (address && (address < end));
- return 0;
-}
-
-static int remap_area_pud(pud_t *pud, unsigned long address,
- unsigned long end, unsigned long phys_addr,
- pgprot_t prot)
-{
- unsigned long next;
-
- phys_addr -= address;
-
- do {
- pmd_t *pmd = pmd_alloc(&init_mm, pud, address);
- if (!pmd)
- return -ENOMEM;
- next = (address + PUD_SIZE) & PUD_MASK;
- if (remap_area_pmd(pmd, address, next,
- phys_addr + address, prot))
- return -ENOMEM;
-
- address = next;
- pud++;
- } while (address && address < end);
-
- return 0;
-}
-
-static int remap_area_pages(unsigned long address, unsigned long phys_addr,
- size_t size, pgprot_t prot)
-{
- unsigned long end = address + size;
- unsigned long next;
- pgd_t *pgd;
- int err = 0;
-
- phys_addr -= address;
-
- pgd = pgd_offset_k(address);
- flush_cache_all();
- BUG_ON(address >= end);
-
- spin_lock(&init_mm.page_table_lock);
- do {
- pud_t *pud = pud_alloc(&init_mm, pgd, address);
-
- err = -ENOMEM;
- if (!pud)
- break;
-
- next = (address + PGDIR_SIZE) & PGDIR_MASK;
- if (next < address || next > end)
- next = end;
- err = remap_area_pud(pud, address, next,
- phys_addr + address, prot);
- if (err)
- break;
-
- address = next;
- pgd++;
- } while (address && (address < end));
-
- spin_unlock(&init_mm.page_table_lock);
- flush_tlb_all();
- return err;
-}
-