Merge branches 'pxa' and 'orion-fixes1'

[linux-2.6] / include / asm-powerpc / pgtable-ppc64.h

diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h
index d61178dea67047e5640dbfa743043ed22b113980..dd4c26dc57d2727d533c19fef3f9ad4224ccf737 100644 (file)
--- a/include/asm-powerpc/pgtable-ppc64.h
+++ b/include/asm-powerpc/pgtable-ppc64.h
@@ -67,6 +67,14 @@
 #define KERNEL_REGION_ID       (REGION_ID(PAGE_OFFSET))
 #define USER_REGION_ID         (0UL)
 
+/*
+ * Defines the address of the vmemap area, in the top 16th of the
+ * kernel region.
+ */
+#define VMEMMAP_BASE (ASM_CONST(CONFIG_KERNEL_START) + \
+                                       (0xfUL << (REGION_SHIFT - 4)))
+#define vmemmap ((struct page *)VMEMMAP_BASE)
+
 /*
  * Common bits in a linux-style PTE.  These match the bits in the
  * (hardware-defined) PowerPC PTE as closely as possible. Additional
@@ -227,9 +235,7 @@ static inline pte_t pfn_pte(unsigned long pfn, pgprot_t pgprot)
  * The following only work if pte_present() is true.
  * Undefined behaviour if not..
  */
-static inline int pte_read(pte_t pte)  { return pte_val(pte) & _PAGE_USER;}
 static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_RW;}
-static inline int pte_exec(pte_t pte)  { return pte_val(pte) & _PAGE_EXEC;}
 static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY;}
 static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED;}
 static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE;}
@@ -237,20 +243,12 @@ static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE;}
 static inline void pte_uncache(pte_t pte) { pte_val(pte) |= _PAGE_NO_CACHE; }
 static inline void pte_cache(pte_t pte)   { pte_val(pte) &= ~_PAGE_NO_CACHE; }
 
-static inline pte_t pte_rdprotect(pte_t pte) {
-       pte_val(pte) &= ~_PAGE_USER; return pte; }
-static inline pte_t pte_exprotect(pte_t pte) {
-       pte_val(pte) &= ~_PAGE_EXEC; return pte; }
 static inline pte_t pte_wrprotect(pte_t pte) {
        pte_val(pte) &= ~(_PAGE_RW); return pte; }
 static inline pte_t pte_mkclean(pte_t pte) {
        pte_val(pte) &= ~(_PAGE_DIRTY); return pte; }
 static inline pte_t pte_mkold(pte_t pte) {
        pte_val(pte) &= ~_PAGE_ACCESSED; return pte; }
-static inline pte_t pte_mkread(pte_t pte) {
-       pte_val(pte) |= _PAGE_USER; return pte; }
-static inline pte_t pte_mkexec(pte_t pte) {
-       pte_val(pte) |= _PAGE_USER | _PAGE_EXEC; return pte; }
 static inline pte_t pte_mkwrite(pte_t pte) {
        pte_val(pte) |= _PAGE_RW; return pte; }
 static inline pte_t pte_mkdirty(pte_t pte) {
@@ -302,29 +300,6 @@ static inline int __ptep_test_and_clear_young(struct mm_struct *mm,
        __r;                                                               \
 })
 
-/*
- * On RW/DIRTY bit transitions we can avoid flushing the hpte. For the
- * moment we always flush but we need to fix hpte_update and test if the
- * optimisation is worth it.
- */
-static inline int __ptep_test_and_clear_dirty(struct mm_struct *mm,
-                                             unsigned long addr, pte_t *ptep)
-{
-       unsigned long old;
-
-               if ((pte_val(*ptep) & _PAGE_DIRTY) == 0)
-               return 0;
-       old = pte_update(mm, addr, ptep, _PAGE_DIRTY, 0);
-       return (old & _PAGE_DIRTY) != 0;
-}
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-#define ptep_test_and_clear_dirty(__vma, __addr, __ptep)                  \
-({                                                                        \
-       int __r;                                                           \
-       __r = __ptep_test_and_clear_dirty((__vma)->vm_mm, __addr, __ptep); \
-       __r;                                                               \
-})
-
 #define __HAVE_ARCH_PTEP_SET_WRPROTECT
 static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
                                      pte_t *ptep)
@@ -352,14 +327,6 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
        __young;                                                        \
 })
 
-#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
-#define ptep_clear_flush_dirty(__vma, __address, __ptep)               \
-({                                                                     \
-       int __dirty = __ptep_test_and_clear_dirty((__vma)->vm_mm, __address, \
-                                                 __ptep);              \
-       __dirty;                                                        \
-})
-
 #define __HAVE_ARCH_PTEP_GET_AND_CLEAR
 static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
                                       unsigned long addr, pte_t *ptep)
@@ -408,10 +375,14 @@ static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry, int dirty)
        :"cc");
 }
 #define  ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-       do {                                                               \
-               __ptep_set_access_flags(__ptep, __entry, __dirty);         \
-               flush_tlb_page_nohash(__vma, __address);                   \
-       } while(0)
+({                                                                        \
+       int __changed = !pte_same(*(__ptep), __entry);                     \
+       if (__changed) {                                                   \
+               __ptep_set_access_flags(__ptep, __entry, __dirty);         \
+               flush_tlb_page_nohash(__vma, __address);                   \
+       }                                                                  \
+       __changed;                                                         \
+})
 
 /*
  * Macro to mark a page protection value as "uncacheable".