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-rw-r--r--include/asm-generic/4level-fixup.h38
1 files changed, 38 insertions, 0 deletions
diff --git a/include/asm-generic/4level-fixup.h b/include/asm-generic/4level-fixup.h
new file mode 100644
index 000000000..5bdab6bff
--- /dev/null
+++ b/include/asm-generic/4level-fixup.h
@@ -0,0 +1,38 @@
+#ifndef _4LEVEL_FIXUP_H
+#define _4LEVEL_FIXUP_H
+
+#define __ARCH_HAS_4LEVEL_HACK
+#define __PAGETABLE_PUD_FOLDED
+
+#define PUD_SHIFT PGDIR_SHIFT
+#define PUD_SIZE PGDIR_SIZE
+#define PUD_MASK PGDIR_MASK
+#define PTRS_PER_PUD 1
+
+#define pud_t pgd_t
+
+#define pmd_alloc(mm, pud, address) \
+ ((unlikely(pgd_none(*(pud))) && __pmd_alloc(mm, pud, address))? \
+ NULL: pmd_offset(pud, address))
+
+#define pud_alloc(mm, pgd, address) (pgd)
+#define pud_offset(pgd, start) (pgd)
+#define pud_none(pud) 0
+#define pud_bad(pud) 0
+#define pud_present(pud) 1
+#define pud_ERROR(pud) do { } while (0)
+#define pud_clear(pud) pgd_clear(pud)
+#define pud_val(pud) pgd_val(pud)
+#define pud_populate(mm, pud, pmd) pgd_populate(mm, pud, pmd)
+#define pud_page(pud) pgd_page(pud)
+#define pud_page_vaddr(pud) pgd_page_vaddr(pud)
+
+#undef pud_free_tlb
+#define pud_free_tlb(tlb, x, addr) do { } while (0)
+#define pud_free(mm, x) do { } while (0)
+#define __pud_free_tlb(tlb, x, addr) do { } while (0)
+
+#undef pud_addr_end
+#define pud_addr_end(addr, end) (end)
+
+#endif