x86: introduce /dev/mem restrictions with a config option

[linux-2.6-omap-h63xx.git] / include / asm-x86 / page.h

diff --git a/include/asm-x86/page.h b/include/asm-x86/page.h
index 91920565a575d5377961b2d8497bcbb0106cc6f8..b381f4a5a0bd90fc0e75268f5ee743b56ff1d3dd 100644 (file)
--- a/include/asm-x86/page.h
+++ b/include/asm-x86/page.h
@@ -13,8 +13,8 @@
 #define PHYSICAL_PAGE_MASK     (PAGE_MASK & __PHYSICAL_MASK)
 #define PTE_MASK               (_AT(long, PHYSICAL_PAGE_MASK))
 
-#define LARGE_PAGE_SIZE                (_AC(1,UL) << PMD_SHIFT)
-#define LARGE_PAGE_MASK                (~(LARGE_PAGE_SIZE-1))
+#define PMD_PAGE_SIZE          (_AC(1, UL) << PMD_SHIFT)
+#define PMD_PAGE_MASK          (~(PMD_PAGE_SIZE-1))
 
 #define HPAGE_SHIFT            PMD_SHIFT
 #define HPAGE_SIZE             (_AC(1,UL) << HPAGE_SHIFT)
@@ -45,15 +45,21 @@
 
 
 #ifndef __ASSEMBLY__
+
+extern int page_is_ram(unsigned long pagenr);
+extern int devmem_is_allowed(unsigned long pagenr);
+
+extern unsigned long max_pfn_mapped;
+
 struct page;
 
-static void inline clear_user_page(void *page, unsigned long vaddr,
+static inline void clear_user_page(void *page, unsigned long vaddr,
                                struct page *pg)
 {
        clear_page(page);
 }
 
-static void inline copy_user_page(void *to, void *from, unsigned long vaddr,
+static inline void copy_user_page(void *to, void *from, unsigned long vaddr,
                                struct page *topage)
 {
        copy_page(to, from);
@@ -91,6 +97,11 @@ static inline pudval_t native_pud_val(pud_t pud)
 }
 #else  /* PAGETABLE_LEVELS == 3 */
 #include <asm-generic/pgtable-nopud.h>
+
+static inline pudval_t native_pud_val(pud_t pud)
+{
+       return native_pgd_val(pud.pgd);
+}
 #endif /* PAGETABLE_LEVELS == 4 */
 
 typedef struct { pmdval_t pmd; } pmd_t;
@@ -106,8 +117,23 @@ static inline pmdval_t native_pmd_val(pmd_t pmd)
 }
 #else  /* PAGETABLE_LEVELS == 2 */
 #include <asm-generic/pgtable-nopmd.h>
+
+static inline pmdval_t native_pmd_val(pmd_t pmd)
+{
+       return native_pgd_val(pmd.pud.pgd);
+}
 #endif /* PAGETABLE_LEVELS >= 3 */
 
+static inline pte_t native_make_pte(pteval_t val)
+{
+       return (pte_t) { .pte = val };
+}
+
+static inline pteval_t native_pte_val(pte_t pte)
+{
+       return pte.pte;
+}
+
 #define pgprot_val(x)  ((x).pgprot)
 #define __pgprot(x)    ((pgprot_t) { (x) } )