1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_HUGETLB_H 3 #define _ASM_POWERPC_HUGETLB_H 4 5 #ifdef CONFIG_HUGETLB_PAGE 6 #include <asm/page.h> 7 8 #ifdef CONFIG_PPC_BOOK3S_64 9 #include <asm/book3s/64/hugetlb.h> 10 #elif defined(CONFIG_PPC_E500) 11 #include <asm/nohash/hugetlb-e500.h> 12 #elif defined(CONFIG_PPC_8xx) 13 #include <asm/nohash/32/hugetlb-8xx.h> 14 #endif /* CONFIG_PPC_BOOK3S_64 */ 15 16 extern bool hugetlb_disabled; 17 18 static inline bool hugepages_supported(void) 19 { 20 if (hugetlb_disabled) 21 return false; 22 23 return HPAGE_SHIFT != 0; 24 } 25 #define hugepages_supported hugepages_supported 26 27 void __init hugetlbpage_init_defaultsize(void); 28 29 int slice_is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, 30 unsigned long len); 31 32 static inline int is_hugepage_only_range(struct mm_struct *mm, 33 unsigned long addr, 34 unsigned long len) 35 { 36 if (IS_ENABLED(CONFIG_PPC_64S_HASH_MMU) && !radix_enabled()) 37 return slice_is_hugepage_only_range(mm, addr, len); 38 return 0; 39 } 40 #define is_hugepage_only_range is_hugepage_only_range 41 42 #define __HAVE_ARCH_HUGE_SET_HUGE_PTE_AT 43 void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, 44 pte_t pte, unsigned long sz); 45 46 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR 47 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 48 unsigned long addr, pte_t *ptep, 49 unsigned long sz) 50 { 51 return __pte(pte_update(mm, addr, ptep, ~0UL, 0, 1)); 52 } 53 54 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH 55 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma, 56 unsigned long addr, pte_t *ptep) 57 { 58 pte_t pte; 59 unsigned long sz = huge_page_size(hstate_vma(vma)); 60 61 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep, sz); 62 flush_hugetlb_page(vma, addr); 63 return pte; 64 } 65 66 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS 67 int huge_ptep_set_access_flags(struct vm_area_struct *vma, 68 unsigned long addr, pte_t *ptep, 69 pte_t pte, int dirty); 70 71 #include <asm-generic/hugetlb.h> 72 73 #else /* ! CONFIG_HUGETLB_PAGE */ 74 static inline void flush_hugetlb_page(struct vm_area_struct *vma, 75 unsigned long vmaddr) 76 { 77 } 78 79 static inline void __init hugetlbpage_init_defaultsize(void) 80 { 81 } 82 #endif /* CONFIG_HUGETLB_PAGE */ 83 84 #endif /* _ASM_POWERPC_HUGETLB_H */ 85