1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
6 #ifndef __ASM_HUGETLB_H
7 #define __ASM_HUGETLB_H
11 uint64_t pmd_to_entrylo(unsigned long pmd_val);
13 #define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
14 static inline int prepare_hugepage_range(struct file *file,
18 unsigned long task_size = STACK_TOP;
19 struct hstate *h = hstate_file(file);
21 if (len & ~huge_page_mask(h))
23 if (addr & ~huge_page_mask(h))
27 if (task_size - len < addr)
32 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
33 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
34 unsigned long addr, pte_t *ptep)
39 pte_val(clear) = (unsigned long)invalid_pte_table;
40 set_pte_at(mm, addr, ptep, clear);
44 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
45 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
46 unsigned long addr, pte_t *ptep)
50 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
51 flush_tlb_page(vma, addr);
55 #define __HAVE_ARCH_HUGE_PTE_NONE
56 static inline int huge_pte_none(pte_t pte)
58 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
59 return !val || (val == (unsigned long)invalid_pte_table);
62 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
63 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
65 pte_t *ptep, pte_t pte,
68 int changed = !pte_same(*ptep, pte);
71 set_pte_at(vma->vm_mm, addr, ptep, pte);
73 * There could be some standard sized pages in there,
76 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
81 #include <asm-generic/hugetlb.h>
83 #endif /* __ASM_HUGETLB_H */