1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_M32R_PGALLOC_H
3 #define _ASM_M32R_PGALLOC_H
4
5 #include <linux/mm.h>
6
7 #include <asm/io.h>
8
9 #define pmd_populate_kernel(mm, pmd, pte) \
10 set_pmd(pmd, __pmd(_PAGE_TABLE + __pa(pte)))
11
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pgtable_t pte)12 static __inline__ void pmd_populate(struct mm_struct *mm, pmd_t *pmd,
13 pgtable_t pte)
14 {
15 set_pmd(pmd, __pmd(_PAGE_TABLE + page_to_phys(pte)));
16 }
17 #define pmd_pgtable(pmd) pmd_page(pmd)
18
19 /*
20 * Allocate and free page tables.
21 */
pgd_alloc(struct mm_struct * mm)22 static __inline__ pgd_t *pgd_alloc(struct mm_struct *mm)
23 {
24 pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
25
26 return pgd;
27 }
28
pgd_free(struct mm_struct * mm,pgd_t * pgd)29 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
30 {
31 free_page((unsigned long)pgd);
32 }
33
pte_alloc_one_kernel(struct mm_struct * mm,unsigned long address)34 static __inline__ pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
35 unsigned long address)
36 {
37 pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
38
39 return pte;
40 }
41
pte_alloc_one(struct mm_struct * mm,unsigned long address)42 static __inline__ pgtable_t pte_alloc_one(struct mm_struct *mm,
43 unsigned long address)
44 {
45 struct page *pte = alloc_page(GFP_KERNEL|__GFP_ZERO);
46
47 if (!pte)
48 return NULL;
49 if (!pgtable_page_ctor(pte)) {
50 __free_page(pte);
51 return NULL;
52 }
53 return pte;
54 }
55
pte_free_kernel(struct mm_struct * mm,pte_t * pte)56 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
57 {
58 free_page((unsigned long)pte);
59 }
60
pte_free(struct mm_struct * mm,pgtable_t pte)61 static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
62 {
63 pgtable_page_dtor(pte);
64 __free_page(pte);
65 }
66
67 #define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, (pte))
68
69 /*
70 * allocating and freeing a pmd is trivial: the 1-entry pmd is
71 * inside the pgd, so has no extra memory associated with it.
72 * (In the PAE case we free the pmds as part of the pgd.)
73 */
74
75 #define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); })
76 #define pmd_free(mm, x) do { } while (0)
77 #define __pmd_free_tlb(tlb, x, addr) do { } while (0)
78 #define pgd_populate(mm, pmd, pte) BUG()
79
80 #define check_pgt_cache() do { } while (0)
81
82 #endif /* _ASM_M32R_PGALLOC_H */
83