1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (C) 2020 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
prepare_hugepage_range(struct file *file, unsigned long addr, unsigned long len)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 struct hstate *h = hstate_file(file);
20
21 if (len & ~huge_page_mask(h))
22 return -EINVAL;
23 if (addr & ~huge_page_mask(h))
24 return -EINVAL;
25 if (len > task_size)
26 return -ENOMEM;
27 if (task_size - len < addr)
28 return -EINVAL;
29 return 0;
30 }
31
32 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)33 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
34 unsigned long addr, pte_t *ptep)
35 {
36 pte_t clear;
37 pte_t pte = *ptep;
38
39 pte_val(clear) = (unsigned long)invalid_pte_table;
40 set_pte_at(mm, addr, ptep, clear);
41 return pte;
42 }
43
44 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
huge_ptep_clear_flush(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)45 static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
46 unsigned long addr, pte_t *ptep)
47 {
48 huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
49 flush_tlb_page(vma, addr);
50 }
51
52 #define __HAVE_ARCH_HUGE_PTE_NONE
huge_pte_none(pte_t pte)53 static inline int huge_pte_none(pte_t pte)
54 {
55 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
56 return !val || (val == (unsigned long)invalid_pte_table);
57 }
58
59 #define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
huge_ptep_set_access_flags(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, pte_t pte, int dirty)60 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
61 unsigned long addr,
62 pte_t *ptep, pte_t pte,
63 int dirty)
64 {
65 int changed = !pte_same(*ptep, pte);
66
67 if (changed) {
68 set_pte_at(vma->vm_mm, addr, ptep, pte);
69 /*
70 * There could be some standard sized pages in there,
71 * get them all.
72 */
73 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
74 }
75 return changed;
76 }
77
78 #include <asm-generic/hugetlb.h>
79
80 #endif /* __ASM_HUGETLB_H */
81