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 */ 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 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 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 */ 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 */ 57 static inline int get_hugepd_cache_index(int index) 58 { 59 BUG(); 60 } 61 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 */ 66 67 static inline int remap_4k_pfn(struct vm_area_struct *vma, unsigned long addr, 68 unsigned long pfn, pgprot_t prot) 69 { 70 if (radix_enabled()) 71 BUG(); 72 return hash__remap_4k_pfn(vma, addr, pfn, prot); 73 } 74 #endif /* __ASSEMBLY__ */ 75 #endif /*_ASM_POWERPC_BOOK3S_64_PGTABLE_64K_H */ 76