1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _PGTABLE_NOPUD_H
3 #define _PGTABLE_NOPUD_H
4
5 #ifndef __ASSEMBLY__
6
7 #include <asm-generic/pgtable-nop4d.h>
8
9 #define __PAGETABLE_PUD_FOLDED 1
10
11 /*
12 * Having the pud type consist of a p4d gets t
13 * us to conceptually access the p4d entry tha
14 * without casting.
15 */
16 typedef struct { p4d_t p4d; } pud_t;
17
18 #define PUD_SHIFT P4D_SHIFT
19 #define PTRS_PER_PUD 1
20 #define PUD_SIZE (1UL << PUD_SHIFT)
21 #define PUD_MASK (~(PUD_SIZE-1))
22
23 /*
24 * The "p4d_xxx()" functions here are trivial
25 * setup: the pud is never bad, and a pud alwa
26 * into the p4d entry)
27 */
28 static inline int p4d_none(p4d_t p4d)
29 static inline int p4d_bad(p4d_t p4d)
30 static inline int p4d_present(p4d_t p4d)
31 static inline void p4d_clear(p4d_t *p4d)
32 #define pud_ERROR(pud)
33
34 #define p4d_populate(mm, p4d, pud)
35 #define p4d_populate_safe(mm, p4d, pud)
36 /*
37 * (puds are folded into p4ds so this doesn't
38 * but the define is needed for a generic inli
39 */
40 #define set_p4d(p4dptr, p4dval) set_pud((pud_t
41
42 static inline pud_t *pud_offset(p4d_t *p4d, un
43 {
44 return (pud_t *)p4d;
45 }
46 #define pud_offset pud_offset
47
48 #define pud_val(x)
49 #define __pud(x)
50
51 #define p4d_page(p4d)
52 #define p4d_pgtable(p4d)
53
54 /*
55 * allocating and freeing a pud is trivial: th
56 * inside the p4d, so has no extra memory asso
57 */
58 #define pud_alloc_one(mm, address)
59 #define pud_free(mm, x)
60 #define pud_free_tlb(tlb, x, a)
61
62 #undef pud_addr_end
63 #define pud_addr_end(addr, end)
64
65 #endif /* __ASSEMBLY__ */
66 #endif /* _PGTABLE_NOPUD_H */
67
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