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 
33 /*
34  * With 64k page size, we have hugepage ptes in the pgd and pmd entries. We don't
35  * need to setup hugepage directory for them. Our pte and page directory format
36  * enable us to have this enabled.
37  */
hugepd_ok(hugepd_t hpd)38 static inline int hugepd_ok(hugepd_t hpd)
39 {
40 	return 0;
41 }
42 
43 #define is_hugepd(pdep)			0
44 
45 /*
46  * This should never get called
47  */
get_hugepd_cache_index(int index)48 static inline int get_hugepd_cache_index(int index)
49 {
50 	BUG();
51 }
52 
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