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 #include <asm-generic/pgalloc.h>
18 extern const char bad_pmd_string[];
20 #define __pte_free_tlb(tlb, pte, addr) \
22 pagetable_pte_dtor(page_ptdesc(pte)); \
23 tlb_remove_page_ptdesc((tlb), page_ptdesc(pte)); \
26 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
28 pmd_val(*pmd) = __pa((unsigned long)pte);
31 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
33 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
37 * allocating and freeing a pmd is trivial: the 1-entry pmd is
38 * inside the pgd, so has no extra memory associated with it.
40 #define pmd_free(mm, x) do { } while (0)
42 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
46 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
47 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
48 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
52 #endif /* SUN3_PGALLOC_H */