1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _5LEVEL_FIXUP_H
3 #define _5LEVEL_FIXUP_H
4
5 #define __ARCH_HAS_5LEVEL_HACK
6 #define __PAGETABLE_P4D_FOLDED 1
7
8 #define P4D_SHIFT PGDIR_SHIFT
9 #define P4D_SIZE PGDIR_SIZE
10 #define P4D_MASK PGDIR_MASK
11 #define MAX_PTRS_PER_P4D 1
12 #define PTRS_PER_P4D 1
13
14 #define p4d_t pgd_t
15
16 #define pud_alloc(mm, p4d, address) \
17 ((unlikely(pgd_none(*(p4d))) && __pud_alloc(mm, p4d, address)) ? \
18 NULL : pud_offset(p4d, address))
19
20 #define p4d_alloc(mm, pgd, address) (pgd)
21 #define p4d_offset(pgd, start) (pgd)
22
23 #ifndef __ASSEMBLY__
p4d_none(p4d_t p4d)24 static inline int p4d_none(p4d_t p4d)
25 {
26 return 0;
27 }
28
p4d_bad(p4d_t p4d)29 static inline int p4d_bad(p4d_t p4d)
30 {
31 return 0;
32 }
33
p4d_present(p4d_t p4d)34 static inline int p4d_present(p4d_t p4d)
35 {
36 return 1;
37 }
38 #endif
39
40 #define p4d_ERROR(p4d) do { } while (0)
41 #define p4d_clear(p4d) pgd_clear(p4d)
42 #define p4d_val(p4d) pgd_val(p4d)
43 #define p4d_populate(mm, p4d, pud) pgd_populate(mm, p4d, pud)
44 #define p4d_populate_safe(mm, p4d, pud) pgd_populate(mm, p4d, pud)
45 #define p4d_page(p4d) pgd_page(p4d)
46 #define p4d_page_vaddr(p4d) pgd_page_vaddr(p4d)
47
48 #define __p4d(x) __pgd(x)
49 #define set_p4d(p4dp, p4d) set_pgd(p4dp, p4d)
50
51 #undef p4d_free_tlb
52 #define p4d_free_tlb(tlb, x, addr) do { } while (0)
53 #define p4d_free(mm, x) do { } while (0)
54 #define __p4d_free_tlb(tlb, x, addr) do { } while (0)
55
56 #undef p4d_addr_end
57 #define p4d_addr_end(addr, end) (end)
58
59 #endif
60
