powerpc: Fix pte_update for CONFIG_PTE_64BIT and !PTE_ATOMIC_UPDATES

[linux-2.6-omap-h63xx.git] / include / asm-powerpc / pgtable-ppc64.h

diff --git a/include/asm-powerpc/pgtable-ppc64.h b/include/asm-powerpc/pgtable-ppc64.h
index 27f18695f7d6627f18071b6870281a665a431fef..ab98a9c80b2883b60957a0a7a69f2758de133687 100644 (file)
--- a/include/asm-powerpc/pgtable-ppc64.h
+++ b/include/asm-powerpc/pgtable-ppc64.h
@@ -65,15 +65,15 @@
 
 #define VMALLOC_REGION_ID      (REGION_ID(VMALLOC_START))
 #define KERNEL_REGION_ID       (REGION_ID(PAGE_OFFSET))
+#define VMEMMAP_REGION_ID      (0xfUL)
 #define USER_REGION_ID         (0UL)
 
 /*
- * Defines the address of the vmemap area, in the top 16th of the
- * kernel region.
+ * Defines the address of the vmemap area, in its own region
  */
-#define VMEMMAP_BASE (ASM_CONST(CONFIG_KERNEL_START) + \
-                                       (0xfUL << (REGION_SHIFT - 4)))
-#define vmemmap ((struct page *)VMEMMAP_BASE)
+#define VMEMMAP_BASE           (VMEMMAP_REGION_ID << REGION_SHIFT)
+#define vmemmap                        ((struct page *)VMEMMAP_BASE)
+
 
 /*
  * Common bits in a linux-style PTE.  These match the bits in the
@@ -91,9 +91,11 @@
 #define _PAGE_DIRTY    0x0080 /* C: page changed */
 #define _PAGE_ACCESSED 0x0100 /* R: page referenced */
 #define _PAGE_RW       0x0200 /* software: user write access allowed */
-#define _PAGE_HASHPTE  0x0400 /* software: pte has an associated HPTE */
 #define _PAGE_BUSY     0x0800 /* software: PTE & hash are busy */
 
+/* Strong Access Ordering */
+#define _PAGE_SAO      (_PAGE_WRITETHRU | _PAGE_NO_CACHE | _PAGE_COHERENT)
+
 #define _PAGE_BASE     (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_COHERENT)
 
 #define _PAGE_WRENABLE (_PAGE_RW | _PAGE_DIRTY)
@@ -314,6 +316,16 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
        old = pte_update(mm, addr, ptep, _PAGE_RW, 0);
 }
 
+static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
+                                          unsigned long addr, pte_t *ptep)
+{
+       unsigned long old;
+
+       if ((pte_val(*ptep) & _PAGE_RW) == 0)
+               return;
+       old = pte_update(mm, addr, ptep, _PAGE_RW, 1);
+}
+
 /*
  * We currently remove entries from the hashtable regardless of whether
  * the entry was young or dirty. The generic routines only flush if the