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
11uint64_t pmd_to_entrylo(unsigned long pmd_val);
12
13#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
14static 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
33static 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
45static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
46					  unsigned long addr, pte_t *ptep)
47{
48	pte_t pte;
49
50	pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
51	flush_tlb_page(vma, addr);
52	return pte;
53}
54
55#define __HAVE_ARCH_HUGE_PTE_NONE
56static inline int huge_pte_none(pte_t pte)
57{
58	unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
59	return !val || (val == (unsigned long)invalid_pte_table);
60}
61
62#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
63static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
64					     unsigned long addr,
65					     pte_t *ptep, pte_t pte,
66					     int dirty)
67{
68	int changed = !pte_same(*ptep, pte);
69
70	if (changed) {
71		set_pte_at(vma->vm_mm, addr, ptep, pte);
72		/*
73		 * There could be some standard sized pages in there,
74		 * get them all.
75		 */
76		flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
77	}
78	return changed;
79}
80
81#include <asm-generic/hugetlb.h>
82
83#endif /* __ASM_HUGETLB_H */

 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
11uint64_t pmd_to_entrylo(unsigned long pmd_val);
12
13#define __HAVE_ARCH_PREPARE_HUGEPAGE_RANGE
14static 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
33static 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
45static inline pte_t huge_ptep_clear_flush(struct vm_area_struct *vma,
46					  unsigned long addr, pte_t *ptep)
47{
48	pte_t pte;
49
50	pte = huge_ptep_get_and_clear(vma->vm_mm, addr, ptep);
51	flush_tlb_page(vma, addr);
52	return pte;
53}
54
55#define __HAVE_ARCH_HUGE_PTE_NONE
56static inline int huge_pte_none(pte_t pte)
57{
58	unsigned long val = pte_val(pte) & ~_PAGE_GLOBAL;
59	return !val || (val == (unsigned long)invalid_pte_table);
60}
61
62#define __HAVE_ARCH_HUGE_PTEP_SET_ACCESS_FLAGS
63static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
64					     unsigned long addr,
65					     pte_t *ptep, pte_t pte,
66					     int dirty)
67{
68	int changed = !pte_same(*ptep, pte);
69
70	if (changed) {
71		set_pte_at(vma->vm_mm, addr, ptep, pte);
72		/*
73		 * There could be some standard sized pages in there,
74		 * get them all.
75		 */
76		flush_tlb_range(vma, addr, addr + HPAGE_SIZE);
77	}
78	return changed;
79}
80
81#include <asm-generic/hugetlb.h>
82
83#endif /* __ASM_HUGETLB_H */