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 /* 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 */ 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 */ 48 static inline int get_hugepd_cache_index(int index) 49 { 50 BUG(); 51 } 52 53 #endif /* CONFIG_HUGETLB_PAGE */ 54 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