1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */
2a9252aaeSAneesh Kumar K.V #ifndef _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
3a9252aaeSAneesh Kumar K.V #define _ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H
4a9252aaeSAneesh Kumar K.V
5a9252aaeSAneesh Kumar K.V #ifndef __ASSEMBLY__
6a9252aaeSAneesh Kumar K.V #ifdef CONFIG_HUGETLB_PAGE
7a9252aaeSAneesh Kumar K.V /*
8a9252aaeSAneesh Kumar K.V * We have PGD_INDEX_SIZ = 12 and PTE_INDEX_SIZE = 8, so that we can have
9a9252aaeSAneesh Kumar K.V * 16GB hugepage pte in PGD and 16MB hugepage pte at PMD;
10a9252aaeSAneesh Kumar K.V *
11a9252aaeSAneesh Kumar K.V * Defined in such a way that we can optimize away code block at build time
12a9252aaeSAneesh Kumar K.V * if CONFIG_HUGETLB_PAGE=n.
138890e033SAneesh Kumar K.V *
148890e033SAneesh Kumar K.V * returns true for pmd migration entries, THP, devmap, hugetlb
158890e033SAneesh Kumar K.V * But compile time dependent on CONFIG_HUGETLB_PAGE
16a9252aaeSAneesh Kumar K.V */
pmd_huge(pmd_t pmd)17a9252aaeSAneesh Kumar K.V static inline int pmd_huge(pmd_t pmd)
18a9252aaeSAneesh Kumar K.V {
19a9252aaeSAneesh Kumar K.V /*
20a9252aaeSAneesh Kumar K.V * leaf pte for huge page
21a9252aaeSAneesh Kumar K.V */
2266c570f5SAneesh Kumar K.V return !!(pmd_raw(pmd) & cpu_to_be64(_PAGE_PTE));
23a9252aaeSAneesh Kumar K.V }
24a9252aaeSAneesh Kumar K.V
pud_huge(pud_t pud)25a9252aaeSAneesh Kumar K.V static inline int pud_huge(pud_t pud)
26a9252aaeSAneesh Kumar K.V {
27a9252aaeSAneesh Kumar K.V /*
28a9252aaeSAneesh Kumar K.V * leaf pte for huge page
29a9252aaeSAneesh Kumar K.V */
3066c570f5SAneesh Kumar K.V return !!(pud_raw(pud) & cpu_to_be64(_PAGE_PTE));
31a9252aaeSAneesh Kumar K.V }
32a9252aaeSAneesh Kumar K.V
33a9252aaeSAneesh Kumar K.V /*
34a9252aaeSAneesh Kumar K.V * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
35a9252aaeSAneesh Kumar K.V * need to setup hugepage directory for them. Our pte and page directory format
36a9252aaeSAneesh Kumar K.V * enable us to have this enabled.
37a9252aaeSAneesh Kumar K.V */
hugepd_ok(hugepd_t hpd)38a9252aaeSAneesh Kumar K.V static inline int hugepd_ok(hugepd_t hpd)
39a9252aaeSAneesh Kumar K.V {
40a9252aaeSAneesh Kumar K.V return 0;
41a9252aaeSAneesh Kumar K.V }
42fadd03c6SAneesh Kumar K.V
43a9252aaeSAneesh Kumar K.V #define is_hugepd(pdep) 0
44a9252aaeSAneesh Kumar K.V
45fadd03c6SAneesh Kumar K.V /*
46fadd03c6SAneesh Kumar K.V * This should never get called
47fadd03c6SAneesh Kumar K.V */
get_hugepd_cache_index(int index)48fadd03c6SAneesh Kumar K.V static inline int get_hugepd_cache_index(int index)
49fadd03c6SAneesh Kumar K.V {
50fadd03c6SAneesh Kumar K.V BUG();
51fadd03c6SAneesh Kumar K.V }
52fadd03c6SAneesh Kumar K.V
53a9252aaeSAneesh Kumar K.V #endif /* CONFIG_HUGETLB_PAGE */
54a9252aaeSAneesh Kumar K.V
remap_4k_pfn(struct vm_area_struct * vma,unsigned long addr,unsigned long pfn,pgprot_t prot)556cc1a0eeSAneesh Kumar K.V static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr,
566cc1a0eeSAneesh Kumar K.V unsigned long pfn, pgprot_t prot)
576cc1a0eeSAneesh Kumar K.V {
586cc1a0eeSAneesh Kumar K.V if (radix_enabled())
596cc1a0eeSAneesh Kumar K.V BUG();
606cc1a0eeSAneesh Kumar K.V return hash__remap_4k_pfn(vma, addr, pfn, prot);
616cc1a0eeSAneesh Kumar K.V }
62a9252aaeSAneesh Kumar K.V #endif /* __ASSEMBLY__ */
63a9252aaeSAneesh Kumar K.V #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */
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