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
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_PTE_CLEAR
huge_pte_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep,unsigned long sz)33 static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
34 pte_t *ptep, unsigned long sz)
35 {
36 pte_t clear;
37
38 pte_val(clear) = (unsigned long)invalid_pte_table;
39 set_pte_at(mm, addr, ptep, clear);
40 }
41
42 #define __HAVE_ARCH_HUGE_PTEP_GET_AND_CLEAR
huge_ptep_get_and_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep,unsigned long sz)43 static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
44 unsigned long addr, pte_t *ptep,
45 unsigned long sz)
46 {
47 pte_t clear;
48 pte_t pte = ptep_get(ptep);
49
50 pte_val(clear) = (unsigned long)invalid_pte_table;
51 set_pte_at(mm, addr, ptep, clear);
52 return pte;
53 }
54
55 #define __HAVE_ARCH_HUGE_PTEP_CLEAR_FLUSH
huge_ptep_clear_flush(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep)56 static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
57 unsigned long addr, pte_t *ptep)
58 {
59 pte_t pte;
60 unsigned long sz = huge_page_size(hstate_vma(vma));
61
62 pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep, sz);
63 flush_tlb_page(vma, addr);
64 return pte;
65 }
66
67 #define __HAVE_ARCH_HUGE_PTE_NONE
huge_pte_none(pte_t pte)68 static inline int huge_pte_none(pte_t pte)
69 {
70 unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
71 return !val || (val == (unsigned long)invalid_pte_table);
72 }
73
74 #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)75 static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
76 unsigned long addr,
77 pte_t *ptep, pte_t pte,
78 int dirty)
79 {
80 int changed = !pte_same(ptep_get(ptep), pte);
81
82 if (changed) {
83 set_pte_at(vma->vm_mm, addr, ptep, pte);
84 /*
85 * There could be some standard sized pages in there,
86 * get them all.
87 */
88 flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
89 }
90 return changed;
91 }
92
93 #include <asm-generic/hugetlb.h>
94
95 #endif /* __ASM_HUGETLB_H */
96