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_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
32 #define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
34 #define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \
35 (unsigned long)(page_address(page)))
37 #define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
39 #define pmd_pgtable(pmd) pmd_page(pmd)
41 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
42 unsigned long address)
44 pgtable_pte_page_dtor(page);
48 #define __pmd_free_tlb(tlb, pmd, address) do { } while (0)
50 static inline struct page *pte_alloc_one(struct mm_struct *mm)
52 struct page *page = alloc_pages(GFP_DMA, 0);
57 if (!pgtable_pte_page_ctor(page)) {
65 __flush_page_to_ram(pte);
66 flush_tlb_kernel_page(pte);
74 static inline void pte_free(struct mm_struct *mm, struct page *page)
76 pgtable_pte_page_dtor(page);
81 * In our implementation, each pgd entry contains 1 pmd that is never allocated
82 * or freed. pgd_present is always 1, so this should never be called. -NL
84 #define pmd_free(mm, pmd) BUG()
86 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
88 free_page((unsigned long) pgd);
91 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
95 new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
98 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
99 memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
103 #define pgd_populate(mm, pmd, pte) BUG()
105 #endif /* M68K_MCF_PGALLOC_H */