1 files changed, 19 insertions, 5 deletions

diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index dc936dddf161..6c846228948d 100644
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -18,8 +18,11 @@
    (ie, 32-bit PAE). */
 #define PHYSICAL_PAGE_MASK      (((signed long)PAGE_MASK) & __PHYSICAL_MASK)
 
-/* PTE_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
-#define PTE_MASK                ((pteval_t)PHYSICAL_PAGE_MASK)
+/* PTE_PFN_MASK extracts the PFN from a (pte|pmd|pud|pgd)val_t */
+#define PTE_PFN_MASK            ((pteval_t)PHYSICAL_PAGE_MASK)
+
+/* PTE_FLAGS_MASK extracts the flags from a (pte|pmd|pud|pgd)val_t */
+#define PTE_FLAGS_MASK          (~PTE_PFN_MASK)
 
 #define PMD_PAGE_SIZE           (_AC(1, UL) << PMD_SHIFT)
 #define PMD_PAGE_MASK           (~(PMD_PAGE_SIZE-1))
@@ -51,9 +54,17 @@
 
 #ifndef __ASSEMBLY__
 
+typedef struct { pgdval_t pgd; } pgd_t;
+typedef struct { pgprotval_t pgprot; } pgprot_t;
+
 extern int page_is_ram(unsigned long pagenr);
 extern int devmem_is_allowed(unsigned long pagenr);
+extern void map_devmem(unsigned long pfn, unsigned long size,
+                       pgprot_t vma_prot);
+extern void unmap_devmem(unsigned long pfn, unsigned long size,
+                         pgprot_t vma_prot);
 
+extern unsigned long max_low_pfn_mapped;
 extern unsigned long max_pfn_mapped;
 
 struct page;
@@ -74,9 +85,6 @@ static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
         alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
 #define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
 
-typedef struct { pgdval_t pgd; } pgd_t;
-typedef struct { pgprotval_t pgprot; } pgprot_t;
-
 static inline pgd_t native_make_pgd(pgdval_t val)
 {
         return (pgd_t) { val };
@@ -139,6 +147,11 @@ static inline pteval_t native_pte_val(pte_t pte)
         return pte.pte;
 }
 
+static inline pteval_t native_pte_flags(pte_t pte)
+{
+        return native_pte_val(pte) & PTE_FLAGS_MASK;
+}
+
 #define pgprot_val(x)   ((x).pgprot)
 #define __pgprot(x)     ((pgprot_t) { (x) } )
 
@@ -160,6 +173,7 @@ static inline pteval_t native_pte_val(pte_t pte)
 #endif
 
 #define pte_val(x)      native_pte_val(x)
+#define pte_flags(x)    native_pte_flags(x)
 #define __pte(x)        native_make_pte(x)
 
 #endif  /* CONFIG_PARAVIRT */