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
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
huge_pte_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep,unsigned long sz)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
huge_ptep_get_and_clear(struct mm_struct * mm,unsigned long addr,pte_t * ptep,unsigned long sz)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
huge_ptep_clear_flush(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep)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
huge_pte_none(pte_t pte)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
huge_ptep_set_access_flags(struct vm_area_struct * vma,unsigned long addr,pte_t * ptep,pte_t pte,int dirty)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