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 extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
10 free_page((unsigned long) pte);
13 extern const char bad_pmd_string[];
15 extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
17 unsigned long page = __get_free_page(GFP_DMA);
22 memset((void *)page, 0, PAGE_SIZE);
23 return (pte_t *) (page);
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 page *page = virt_to_page(pgtable);
40 pgtable_pte_page_dtor(page);
44 static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
46 struct page *page = alloc_pages(GFP_DMA, 0);
51 if (!pgtable_pte_page_ctor(page)) {
56 pte = page_address(page);
62 static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
64 struct page *page = virt_to_page(pgtable);
66 pgtable_pte_page_dtor(page);
71 * In our implementation, each pgd entry contains 1 pmd that is never allocated
72 * or freed. pgd_present is always 1, so this should never be called. -NL
74 #define pmd_free(mm, pmd) BUG()
76 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
78 free_page((unsigned long) pgd);
81 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
85 new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
88 memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
89 memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
93 #endif /* M68K_MCF_PGALLOC_H */