1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
3 #define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
4
5 #ifndef __ASSEMBLY__
6 #ifdef CONFIG_HUGETLB_PAGE
7 /*
8 * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
9 * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
10 *
11 * Defined in such a way that we can optimize away code block at build time
12 * if CONFIG_HUGETLB_PAGE=n.
13 *
14 * returns true for pmd migration entries, THP, devmap, hugetlb
15 * But compile time dependent on CONFIG_HUGETLB_PAGE
16 */
pmd_huge(pmd_t pmd)17 static inline int pmd_huge(pmd_t pmd)
18 {
19 /*
20 * leaf pte for huge page
21 */
22 return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
23 }
24
pud_huge(pud_t pud)25 static inline int pud_huge(pud_t pud)
26 {
27 /*
28 * leaf pte for huge page
29 */
30 return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
31 }
32
pgd_huge(pgd_t pgd)33 static inline int pgd_huge(pgd_t pgd)
34 {
35 /*
36 * leaf pte for huge page
37 */
38 return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
39 }
40 #define pgd_huge pgd_huge
41
42 /*
43 * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
44 * need to setup hugepage directory for them. Our pte and page directory format
45 * enable us to have this enabled.
46 */
hugepd_ok(hugepd_t hpd)47 static inline int hugepd_ok(hugepd_t hpd)
48 {
49 return 0;
50 }
51
52 #define is_hugepd(pdep) 0
53
54 /*
55 * This should never get called
56 */
get_hugepd_cache_index(int index)57 static inline int get_hugepd_cache_index(int index)
58 {
59 BUG();
60 }
61
62 #endif /* CONFIG_HUGETLB_PAGE */
63
remap_4k_pfn(struct vm_area_struct * vma,unsigned long addr,unsigned long pfn,pgprot_t prot)64 static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
65 unsigned long pfn, pgprot_t prot)
66 {
67 if (radix_enabled())
68 BUG();
69 return hash__remap_4k_pfn(vma, addr, pfn, prot);
70 }
71 #endif /* __ASSEMBLY__ */
72 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */
73