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,
16 unsigned long address)
18 unsigned long page = __get_free_page(GFP_DMA);
23 memset((void *)page, 0, PAGE_SIZE);
24 return (pte_t *) (page);
27 extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
32 #define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
33 #define pmd_alloc_one(mm, address) ({ BUG(); ((pmd_t *)2); })
35 #define pte_alloc_one_fast(mm, addr) pte_alloc_one(mm, addr)
37 #define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \
38 (unsigned long)(page_address(page)))
40 #define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
42 #define pmd_pgtable(pmd) pmd_page(pmd)
44 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
45 unsigned long address)
47 pgtable_page_dtor(page);
51 #define __pmd_free_tlb(tlb, pmd, address) do { } while (0)
53 static inline struct page *pte_alloc_one(struct mm_struct *mm,
54 unsigned long address)
56 struct page *page = alloc_pages(GFP_DMA, 0);
61 if (!pgtable_page_ctor(page)) {
69 __flush_page_to_ram(pte);
70 flush_tlb_kernel_page(pte);
78 static inline void pte_free(struct mm_struct *mm, struct page *page)
80 pgtable_page_dtor(page);
85 * In our implementation, each pgd entry contains 1 pmd that is never allocated
86 * or freed. pgd_present is always 1, so this should never be called. -NL
88 #define pmd_free(mm, pmd) BUG()
90 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
92 free_page((unsigned long) pgd);
95 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
99 new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
102 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
103 memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
107 #define pgd_populate(mm, pmd, pte) BUG()
109 #endif /* M68K_MCF_PGALLOC_H */