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 */
pmd_huge(pmd_t pmd)14 static inline int pmd_huge(pmd_t pmd)
15 {
16 /*
17 * leaf pte for huge page
18 */
19 return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
20 }
21
pud_huge(pud_t pud)22 static inline int pud_huge(pud_t pud)
23 {
24 /*
25 * leaf pte for huge page
26 */
27 return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
28 }
29
pgd_huge(pgd_t pgd)30 static inline int pgd_huge(pgd_t pgd)
31 {
32 /*
33 * leaf pte for huge page
34 */
35 return !!(pgd_raw(pgd) & cpu_to_be64(_PAGE_PTE));
36 }
37 #define pgd_huge pgd_huge
38
39 /*
40 * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
41 * need to setup hugepage directory for them. Our pte and page directory format
42 * enable us to have this enabled.
43 */
hugepd_ok(hugepd_t hpd)44 static inline int hugepd_ok(hugepd_t hpd)
45 {
46 return 0;
47 }
48 #define is_hugepd(pdep) 0
49
50 #else /* !CONFIG_HUGETLB_PAGE */
pmd_huge(pmd_t pmd)51 static inline int pmd_huge(pmd_t pmd) { return 0; }
pud_huge(pud_t pud)52 static inline int pud_huge(pud_t pud) { return 0; }
53 #endif /* CONFIG_HUGETLB_PAGE */
54
remap_4k_pfn(struct vm_area_struct * vma,unsigned long addr,unsigned long pfn,pgprot_t prot)55 static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
56 unsigned long pfn, pgprot_t prot)
57 {
58 if (radix_enabled())
59 BUG();
60 return hash__remap_4k_pfn(vma, addr, pfn, prot);
61 }
62 #endif /* __ASSEMBLY__ */
63 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */
64