vserver 1.9.5.x5

[linux-2.6.git] / include / asm-i386 / pgtable-2level.h

diff --git a/include/asm-i386/pgtable-2level.h b/include/asm-i386/pgtable-2level.h
index cea3979..58026f6 100644 (file)
--- a/include/asm-i386/pgtable-2level.h
+++ b/include/asm-i386/pgtable-2level.h
@@ -1,39 +1,13 @@
 #ifndef _I386_PGTABLE_2LEVEL_H
 #define _I386_PGTABLE_2LEVEL_H
 
-/*
- * traditional i386 two-level paging structure:
- */
-
-#define PGDIR_SHIFT    22
-#define PTRS_PER_PGD   1024
-
-/*
- * the i386 is two-level, so we don't really have any
- * PMD directory physically.
- */
-#define PMD_SHIFT      22
-#define PTRS_PER_PMD   1
-
-#define PTRS_PER_PTE   1024
+#include <asm-generic/pgtable-nopmd.h>
 
 #define pte_ERROR(e) \
        printk("%s:%d: bad pte %08lx.\n", __FILE__, __LINE__, (e).pte_low)
-#define pmd_ERROR(e) \
-       printk("%s:%d: bad pmd %08lx.\n", __FILE__, __LINE__, pmd_val(e))
 #define pgd_ERROR(e) \
        printk("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
 
-/*
- * The "pgd_xxx()" functions here are trivial for a folded two-level
- * setup: the pgd is never bad, and a pmd always exists (as it's folded
- * into the pgd entry)
- */
-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; }
-#define pgd_clear(xp)                          do { } while (0)
-
 /*
  * Certain architectures need to do special things when PTEs
  * within a page table are directly modified.  Thus, the following
@@ -41,20 +15,8 @@ static inline int pgd_present(pgd_t pgd)     { return 1; }
  */
 #define set_pte(pteptr, pteval) (*(pteptr) = pteval)
 #define set_pte_atomic(pteptr, pteval) set_pte(pteptr,pteval)
-/*
- * (pmds are folded into pgds so this doesn't get actually called,
- * but the define is needed for a generic inline function.)
- */
-#define set_pmd(pmdptr, pmdval) (*(pmdptr) = pmdval)
-#define set_pgd(pgdptr, pgdval) (*(pgdptr) = pgdval)
-
-#define pgd_page(pgd) \
-((unsigned long) __va(pgd_val(pgd) & PAGE_MASK))
+#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
 
-static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
-{
-       return (pmd_t *) dir;
-}
 #define ptep_get_and_clear(xp) __pte(xchg(&(xp)->pte_low, 0))
 #define pte_same(a, b)         ((a).pte_low == (b).pte_low)
 #define pte_page(x)            pfn_to_page(pte_pfn(x))
@@ -63,6 +25,27 @@ static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
 #define pfn_pte(pfn, prot)     __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
 #define pfn_pmd(pfn, prot)     __pmd(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
 
+#define pmd_page(pmd) (pfn_to_page(pmd_val(pmd) >> PAGE_SHIFT))
+
+#define pmd_page_kernel(pmd) \
+((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+
+/*
+ * All present user pages are user-executable:
+ */
+static inline int pte_exec(pte_t pte)
+{
+       return pte_user(pte);
+}
+
+/*
+ * All present pages are kernel-executable:
+ */
+static inline int pte_exec_kernel(pte_t pte)
+{
+       return 1;
+}
+
 /*
  * Bits 0, 6 and 7 are taken, split up the 29 bits of offset
  * into this range:
@@ -75,4 +58,11 @@ static inline pmd_t * pmd_offset(pgd_t * dir, unsigned long address)
 #define pgoff_to_pte(off) \
        ((pte_t) { (((off) & 0x1f) << 1) + (((off) >> 5) << 8) + _PAGE_FILE })
 
+/* Encode and de-code a swap entry */
+#define __swp_type(x)                  (((x).val >> 1) & 0x1f)
+#define __swp_offset(x)                        ((x).val >> 8)
+#define __swp_entry(type, offset)      ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
+#define __pte_to_swp_entry(pte)                ((swp_entry_t) { (pte).pte_low })
+#define __swp_entry_to_pte(x)          ((pte_t) { (x).val })
+
 #endif /* _I386_PGTABLE_2LEVEL_H */