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-rw-r--r--include/asm-generic/5level-fixup.h41
1 files changed, 41 insertions, 0 deletions
diff --git a/include/asm-generic/5level-fixup.h b/include/asm-generic/5level-fixup.h
new file mode 100644
index 000000000000..b5ca82dc4175
--- /dev/null
+++ b/include/asm-generic/5level-fixup.h
@@ -0,0 +1,41 @@
+#ifndef _5LEVEL_FIXUP_H
+#define _5LEVEL_FIXUP_H
+
+#define __ARCH_HAS_5LEVEL_HACK
+#define __PAGETABLE_P4D_FOLDED
+
+#define P4D_SHIFT PGDIR_SHIFT
+#define P4D_SIZE PGDIR_SIZE
+#define P4D_MASK PGDIR_MASK
+#define PTRS_PER_P4D 1
+
+#define p4d_t pgd_t
+
+#define pud_alloc(mm, p4d, address) \
+ ((unlikely(pgd_none(*(p4d))) && __pud_alloc(mm, p4d, address)) ? \
+ NULL : pud_offset(p4d, address))
+
+#define p4d_alloc(mm, pgd, address) (pgd)
+#define p4d_offset(pgd, start) (pgd)
+#define p4d_none(p4d) 0
+#define p4d_bad(p4d) 0
+#define p4d_present(p4d) 1
+#define p4d_ERROR(p4d) do { } while (0)
+#define p4d_clear(p4d) pgd_clear(p4d)
+#define p4d_val(p4d) pgd_val(p4d)
+#define p4d_populate(mm, p4d, pud) pgd_populate(mm, p4d, pud)
+#define p4d_page(p4d) pgd_page(p4d)
+#define p4d_page_vaddr(p4d) pgd_page_vaddr(p4d)
+
+#define __p4d(x) __pgd(x)
+#define set_p4d(p4dp, p4d) set_pgd(p4dp, p4d)
+
+#undef p4d_free_tlb
+#define p4d_free_tlb(tlb, x, addr) do { } while (0)
+#define p4d_free(mm, x) do { } while (0)
+#define __p4d_free_tlb(tlb, x, addr) do { } while (0)
+
+#undef p4d_addr_end
+#define p4d_addr_end(addr, end) (end)
+
+#endif