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
6 #ifdef CONFIG_HUGETLB_PAGE
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;
11 * Defined in such a way that we can optimize away code block at build time
12 * if CONFIG_HUGETLB_PAGE=n.
14 * returns true for pmd migration entries, THP, devmap, hugetlb
15 * But compile time dependent on CONFIG_HUGETLB_PAGE
17 static inline int pmd_huge(pmd_t pmd)
20 * leaf pte for huge page
22 return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
25 static inline int pud_huge(pud_t pud)
28 * leaf pte for huge page
30 return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
33 static inline int pgd_huge(pgd_t pgd)
36 * leaf pte for huge page
38 return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
40 #define pgd_huge pgd_huge
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.
47 static inline int hugepd_ok(hugepd_t hpd)
52 #define is_hugepd(pdep) 0
55 * This should never get called
57 static inline int get_hugepd_cache_index(int index)
62 #else /* !CONFIG_HUGETLB_PAGE */
63 static inline int pmd_huge(pmd_t pmd) { return 0; }
64 static inline int pud_huge(pud_t pud) { return 0; }
65 #endif /* CONFIG_HUGETLB_PAGE */
67 static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
68 unsigned long pfn, pgprot_t prot)
72 return hash__remap_4k_pfn(vma, addr, pfn, prot);
74 #endif /* __ASSEMBLY__ */
75 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */