1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef M68K_MCF_PGALLOC_H
3 #define M68K_MCF_PGALLOC_H
6 #include <asm/tlbflush.h>
8 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
10 pagetable_free(virt_to_ptdesc(pte));
13 extern const char bad_pmd_string[];
15 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
17 struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_ZERO) &
23 return ptdesc_address(ptdesc);
26 extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
31 #define pmd_populate(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
33 #define pmd_populate_kernel pmd_populate
35 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable,
36 unsigned long address)
38 struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
40 pagetable_pte_dtor(ptdesc);
41 pagetable_free(ptdesc);
44 static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
46 struct ptdesc *ptdesc = pagetable_alloc(GFP_DMA | __GFP_ZERO, 0);
51 if (!pagetable_pte_ctor(ptdesc)) {
52 pagetable_free(ptdesc);
56 pte = ptdesc_address(ptdesc);
60 static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
62 struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
64 pagetable_pte_dtor(ptdesc);
65 pagetable_free(ptdesc);
69 * In our implementation, each pgd entry contains 1 pmd that is never allocated
70 * or freed. pgd_present is always 1, so this should never be called. -NL
72 #define pmd_free(mm, pmd) BUG()
74 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
76 pagetable_free(virt_to_ptdesc(pgd));
79 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
82 struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_NOWARN) &
87 new_pgd = ptdesc_address(ptdesc);
89 memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
90 memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
94 #endif /* M68K_MCF_PGALLOC_H */