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_PREPARE_HUGEPAGE_RANGE 14 static inline int prepare_hugepage_range(struct file *file, 15 unsigned long addr, 16 unsigned long len) 17 { 18 unsigned long task_size = STACK_TOP; 19 20 if (len > task_size) 21 return -ENOMEM; 22 if (task_size - len < addr) 23 return -EINVAL; 24 return 0; 25 } 26 27 #define __HAVE_ARCH_HUGE_PTE_CLEAR 28 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr, 29 pte_t *ptep, unsigned long sz) 30 { 31 pte_t clear; 32 33 pte_val(clear) = (unsigned long)invalid_pte_table; 34 set_pte_at(mm, addr, ptep, clear); 35 } 36 37 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR 38 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, 39 unsigned long addr, pte_t *ptep, 40 unsigned long sz) 41 { 42 pte_t clear; 43 pte_t pte = ptep_get(ptep); 44 45 pte_val(clear) = (unsigned long)invalid_pte_table; 46 set_pte_at(mm, addr, ptep, clear); 47 return pte; 48 } 49 50 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH 51 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma, 52 unsigned long addr, pte_t *ptep) 53 { 54 pte_t pte; 55 unsigned long sz = huge_page_size(hstate_vma(vma)); 56 57 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep, sz); 58 flush_tlb_page(vma, addr); 59 return pte; 60 } 61 62 #define __HAVE_ARCH_HUGE_PTE_NONE 63 static inline int huge_pte_none(pte_t pte) 64 { 65 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL; 66 return !val || (val == (unsigned long)invalid_pte_table); 67 } 68 69 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS 70 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma, 71 unsigned long addr, 72 pte_t *ptep, pte_t pte, 73 int dirty) 74 { 75 int changed = !pte_same(ptep_get(ptep), pte); 76 77 if (changed) { 78 set_pte_at(vma->vm_mm, addr, ptep, pte); 79 /* 80 * There could be some standard sized pages in there, 81 * get them all. 82 */ 83 flush_tlb_range(vma, addr, addr + HPAGE_SIZE); 84 } 85 return changed; 86 } 87 88 #include <asm-generic/hugetlb.h> 89 90 #endif /* __ASM_HUGETLB_H */ 91