#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
__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)
__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)