1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef __ASM_SH_PGALLOC_H
 3#define __ASM_SH_PGALLOC_H
 4
 5#include <linux/quicklist.h>
 6#include <asm/page.h>
 7
 8#define QUICK_PT 0	/* Other page table pages that are zero on free */
 9
10extern pgd_t *pgd_alloc(struct mm_struct *);
11extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
12
13#if PAGETABLE_LEVELS > 2
14extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
15extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
16extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
17#endif
18
19static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
20				       pte_t *pte)
21{
22	set_pmd(pmd, __pmd((unsigned long)pte));
23}
24
25static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
26				pgtable_t pte)
27{
28	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
29}
30#define pmd_pgtable(pmd) pmd_page(pmd)
31
32/*
33 * Allocate and free page tables.
34 */
35static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
36					  unsigned long address)
37{
38	return quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
39}
40
41static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
42					unsigned long address)
43{
44	struct page *page;
45	void *pg;
46
47	pg = quicklist_alloc(QUICK_PT, GFP_KERNEL, NULL);
48	if (!pg)
49		return NULL;
50	page = virt_to_page(pg);
51	if (!pgtable_page_ctor(page)) {
52		quicklist_free(QUICK_PT, NULL, pg);
53		return NULL;
54	}
55	return page;
56}
57
58static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
59{
60	quicklist_free(QUICK_PT, NULL, pte);
61}
62
63static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
64{
65	pgtable_page_dtor(pte);
66	quicklist_free_page(QUICK_PT, NULL, pte);
67}
68
69#define __pte_free_tlb(tlb,pte,addr)			\
70do {							\
71	pgtable_page_dtor(pte);				\
72	tlb_remove_page((tlb), (pte));			\
73} while (0)
74
75static inline void check_pgt_cache(void)
76{
77	quicklist_trim(QUICK_PT, NULL, 25, 16);
78}
79
80#endif /* __ASM_SH_PGALLOC_H */

 
 1#ifndef __ASM_SH_PGALLOC_H
 2#define __ASM_SH_PGALLOC_H
 3
 4#include <linux/quicklist.h>
 5#include <asm/page.h>
 6
 7#define QUICK_PT 0	/* Other page table pages that are zero on free */
 8
 9extern pgd_t *pgd_alloc(struct mm_struct *);
10extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
11
12#if PAGETABLE_LEVELS > 2
13extern void pud_populate(struct mm_struct *mm, pud_t *pudp, pmd_t *pmd);
14extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
15extern void pmd_free(struct mm_struct *mm, pmd_t *pmd);
16#endif
17
18static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd,
19				       pte_t *pte)
20{
21	set_pmd(pmd, __pmd((unsigned long)pte));
22}
23
24static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
25				pgtable_t pte)
26{
27	set_pmd(pmd, __pmd((unsigned long)page_address(pte)));
28}
29#define pmd_pgtable(pmd) pmd_page(pmd)
30
31/*
32 * Allocate and free page tables.
33 */
34static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
35					  unsigned long address)
36{
37	return quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
38}
39
40static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
41					unsigned long address)
42{
43	struct page *page;
44	void *pg;
45
46	pg = quicklist_alloc(QUICK_PT, GFP_KERNEL | __GFP_REPEAT, NULL);
47	if (!pg)
48		return NULL;
49	page = virt_to_page(pg);
50	pgtable_page_ctor(page);
 
 
 
51	return page;
52}
53
54static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
55{
56	quicklist_free(QUICK_PT, NULL, pte);
57}
58
59static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
60{
61	pgtable_page_dtor(pte);
62	quicklist_free_page(QUICK_PT, NULL, pte);
63}
64
65#define __pte_free_tlb(tlb,pte,addr)			\
66do {							\
67	pgtable_page_dtor(pte);				\
68	tlb_remove_page((tlb), (pte));			\
69} while (0)
70
71static inline void check_pgt_cache(void)
72{
73	quicklist_trim(QUICK_PT, NULL, 25, 16);
74}
75
76#endif /* __ASM_SH_PGALLOC_H */