Merge /spare/repo/linux-2.6/

[linux-2.6-omap-h63xx.git] / include / asm-um / pgtable.h

diff --git a/include/asm-um/pgtable.h b/include/asm-um/pgtable.h
index a88040920311e7e7333d65e3610fe574b8ce4259..b48e0966ecd7b8b936a4be2a3e8cf06d9645edec 100644 (file)
--- a/include/asm-um/pgtable.h
+++ b/include/asm-um/pgtable.h
@@ -16,13 +16,15 @@
 
 #define _PAGE_PRESENT  0x001
 #define _PAGE_NEWPAGE  0x002
-#define _PAGE_NEWPROT   0x004
-#define _PAGE_FILE     0x008   /* set:pagecache unset:swap */
-#define _PAGE_PROTNONE 0x010   /* If not present */
+#define _PAGE_NEWPROT  0x004
 #define _PAGE_RW       0x020
 #define _PAGE_USER     0x040
 #define _PAGE_ACCESSED 0x080
 #define _PAGE_DIRTY    0x100
+/* If _PAGE_PRESENT is clear, we use these: */
+#define _PAGE_FILE     0x008   /* nonlinear file mapping, saved PTE; unset:swap */
+#define _PAGE_PROTNONE 0x010   /* if the user mapped it with PROT_NONE;
+                                  pte_present gives true */
 
 #ifdef CONFIG_3_LEVEL_PGTABLES
 #include "asm/pgtable-3level.h"
@@ -151,10 +153,24 @@ extern unsigned long pg0[1024];
 
 #define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
 
+#define pte_page(x) pfn_to_page(pte_pfn(x))
 #define pte_address(x) (__va(pte_val(x) & PAGE_MASK))
 #define mk_phys(a, r) ((a) + (((unsigned long) r) << REGION_SHIFT))
 #define phys_addr(p) ((p) & ~REGION_MASK)
 
+#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE))
+
+/*
+ * =================================
+ * Flags checking section.
+ * =================================
+ */
+
+static inline int pte_none(pte_t pte)
+{
+       return pte_is_zero(pte);
+}
+
 /*
  * The following only work if pte_present() is true.
  * Undefined behaviour if not..
@@ -210,6 +226,18 @@ static inline int pte_newprot(pte_t pte)
        return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT)));
 }
 
+/*
+ * =================================
+ * Flags setting section.
+ * =================================
+ */
+
+static inline pte_t pte_mknewprot(pte_t pte)
+{
+       pte_set_bits(pte, _PAGE_NEWPROT);
+       return(pte);
+}
+
 static inline pte_t pte_rdprotect(pte_t pte)
 { 
        pte_clear_bits(pte, _PAGE_USER);
@@ -278,6 +306,26 @@ static inline pte_t pte_mkuptodate(pte_t pte)
        return(pte); 
 }
 
+static inline pte_t pte_mknewpage(pte_t pte)
+{
+       pte_set_bits(pte, _PAGE_NEWPAGE);
+       return(pte);
+}
+
+static inline void set_pte(pte_t *pteptr, pte_t pteval)
+{
+       pte_copy(*pteptr, pteval);
+
+       /* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
+        * fix_range knows to unmap it.  _PAGE_NEWPROT is specific to
+        * mapped pages.
+        */
+
+       *pteptr = pte_mknewpage(*pteptr);
+       if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
+}
+#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
 extern phys_t page_to_phys(struct page *page);
 
 /*