1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited 4 */ 5 6 #ifndef __ASM_HUGETLB_H 7 #define __ASM_HUGETLB_H 8 9 #include <asm/page.h> 10 11 uint64_t pmd_to_entrylo(unsigned long pmd_val); 12 13 #define __HAVE_ARCH_HUGE_PTE_CLEAR 14 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr, 15 pte_t *ptep, unsigned long sz) 16 { 17 pte_t clear; 18 19 pte_val(clear) = (unsigned long)invalid_pte_table; 20 set_pte_at(mm, addr, ptep, clear); 21 } 22 23 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR 24 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 25 unsigned long addr, pte_t *ptep, 26 unsigned long sz) 27 { 28 pte_t clear; 29 pte_t pte = ptep_get(ptep); 30 31 pte_val(clear) = (unsigned long)invalid_pte_table; 32 set_pte_at(mm, addr, ptep, clear); 33 return pte; 34 } 35 36 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH 37 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma, 38 unsigned long addr, pte_t *ptep) 39 { 40 pte_t pte; 41 unsigned long sz = huge_page_size(hstate_vma(vma)); 42 43 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep, sz); 44 flush_tlb_page(vma, addr); 45 return pte; 46 } 47 48 #define __HAVE_ARCH_HUGE_PTE_NONE 49 static inline int huge_pte_none(pte_t pte) 50 { 51 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; 52 return !val || (val == (unsigned long)invalid_pte_table); 53 } 54 55 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS 56 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 57 unsigned long addr, 58 pte_t *ptep, pte_t pte, 59 int dirty) 60 { 61 int changed = !pte_same(ptep_get(ptep), pte); 62 63 if (changed) { 64 set_pte_at(vma->vm_mm, addr, ptep, pte); 65 /* 66 * There could be some standard sized pages in there, 67 * get them all. 68 */ 69 flush_tlb_range(vma, addr, addr + HPAGE_SIZE); 70 } 71 return changed; 72 } 73 74 #include <asm-generic/hugetlb.h> 75 76 #endif /* __ASM_HUGETLB_H */ 77