1 /* SPDX-License-Identifier: GPL-2.0 */
3 * reorganization around 2.3.39, routines moved from sun3_pgtable.h
6 * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam)
8 * moved 1/26/2000 Sam Creasey
11 #ifndef _SUN3_PGALLOC_H
12 #define _SUN3_PGALLOC_H
16 extern const char bad_pmd_string[];
18 #define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
21 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
23 free_page((unsigned long) pte);
26 static inline void pte_free(struct mm_struct *mm, pgtable_t page)
28 pgtable_page_dtor(page);
32 #define __pte_free_tlb(tlb,pte,addr) \
34 pgtable_page_dtor(pte); \
35 tlb_remove_page((tlb), pte); \
38 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
40 unsigned long page = __get_free_page(GFP_KERNEL);
45 memset((void *)page, 0, PAGE_SIZE);
46 return (pte_t *) (page);
49 static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
51 struct page *page = alloc_pages(GFP_KERNEL, 0);
57 if (!pgtable_page_ctor(page)) {
65 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
67 pmd_val(*pmd) = __pa((unsigned long)pte);
70 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
72 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
74 #define pmd_pgtable(pmd) pmd_page(pmd)
77 * allocating and freeing a pmd is trivial: the 1-entry pmd is
78 * inside the pgd, so has no extra memory associated with it.
80 #define pmd_free(mm, x) do { } while (0)
81 #define __pmd_free_tlb(tlb, x, addr) do { } while (0)
83 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
85 free_page((unsigned long) pgd);
88 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
92 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
93 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
94 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
98 #define pgd_populate(mm, pmd, pte) BUG()
100 #endif /* SUN3_PGALLOC_H */