vserver 1.9.3

[linux-2.6.git] / include / asm-i386 / pgtable-3level.h

diff --git a/include/asm-i386/pgtable-3level.h b/include/asm-i386/pgtable-3level.h
index 147acd8..80a24b0 100644 (file)
--- a/include/asm-i386/pgtable-3level.h
+++ b/include/asm-i386/pgtable-3level.h
@@ -8,24 +8,6 @@
  * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
  */
 
-/*
- * PGDIR_SHIFT determines what a top-level page table entry can map
- */
-#define PGDIR_SHIFT    30
-#define PTRS_PER_PGD   4
-
-/*
- * PMD_SHIFT determines the size of the area a middle-level
- * page table can map
- */
-#define PMD_SHIFT      21
-#define PTRS_PER_PMD   512
-
-/*
- * entries per page directory level
- */
-#define PTRS_PER_PTE   512
-
 #define pte_ERROR(e) \
        printk("%s:%d: bad pte %p(%08lx%08lx).\n", __FILE__, __LINE__, &(e), (e).pte_high, (e).pte_low)
 #define pmd_ERROR(e) \
@@ -37,6 +19,29 @@ static inline int pgd_none(pgd_t pgd)                { return 0; }
 static inline int pgd_bad(pgd_t pgd)           { return 0; }
 static inline int pgd_present(pgd_t pgd)       { return 1; }
 
+/*
+ * Is the pte executable?
+ */
+static inline int pte_x(pte_t pte)
+{
+       return !(pte_val(pte) & _PAGE_NX);
+}
+
+/*
+ * All present user-pages with !NX bit are user-executable:
+ */
+static inline int pte_exec(pte_t pte)
+{
+       return pte_user(pte) && pte_x(pte);
+}
+/*
+ * All present pages with !NX bit are kernel-executable:
+ */
+static inline int pte_exec_kernel(pte_t pte)
+{
+       return pte_x(pte);
+}
+
 /* Rules for using set_pte: the pte being assigned *must* be
  * either not present or in a state where the hardware will
  * not attempt to update the pte.  In places where this is
@@ -49,6 +54,7 @@ static inline void set_pte(pte_t *ptep, pte_t pte)
        smp_wmb();
        ptep->pte_low = pte.pte_low;
 }
+#define __HAVE_ARCH_SET_PTE_ATOMIC
 #define set_pte_atomic(pteptr,pteval) \
                set_64bit((unsigned long long *)(pteptr),pte_val(pteval))
 #define set_pmd(pmdptr,pmdval) \
@@ -101,18 +107,24 @@ static inline unsigned long pte_pfn(pte_t pte)
                (pte.pte_high << (32 - PAGE_SHIFT));
 }
 
+extern unsigned long long __supported_pte_mask;
+
 static inline pte_t pfn_pte(unsigned long page_nr, pgprot_t pgprot)
 {
        pte_t pte;
 
-       pte.pte_high = page_nr >> (32 - PAGE_SHIFT);
-       pte.pte_low = (page_nr << PAGE_SHIFT) | pgprot_val(pgprot);
+       pte.pte_high = (page_nr >> (32 - PAGE_SHIFT)) | \
+                                       (pgprot_val(pgprot) >> 32);
+       pte.pte_high &= (__supported_pte_mask >> 32);
+       pte.pte_low = ((page_nr << PAGE_SHIFT) | pgprot_val(pgprot)) & \
+                                                       __supported_pte_mask;
        return pte;
 }
 
 static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
 {
-       return __pmd(((unsigned long long)page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
+       return __pmd((((unsigned long long)page_nr << PAGE_SHIFT) | \
+                       pgprot_val(pgprot)) & __supported_pte_mask);
 }
 
 /*
@@ -123,4 +135,11 @@ static inline pmd_t pfn_pmd(unsigned long page_nr, pgprot_t pgprot)
 #define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
 #define PTE_FILE_MAX_BITS       32
 
+/* Encode and de-code a swap entry */
+#define __swp_type(x)                  (((x).val) & 0x1f)
+#define __swp_offset(x)                        ((x).val >> 5)
+#define __swp_entry(type, offset)      ((swp_entry_t){(type) | (offset) << 5})
+#define __pte_to_swp_entry(pte)                ((swp_entry_t){ (pte).pte_high })
+#define __swp_entry_to_pte(x)          ((pte_t){ 0, (x).val })
+
 #endif /* _I386_PGTABLE_3LEVEL_H */