1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* sun3_pgalloc.h --
3 * reorganization around 2.3.39, routines moved from sun3_pgtable.h
4 *
5 *
6 * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam)
7 *
8 * moved 1/26/2000 Sam Creasey
9 */
10
11 #ifndef _SUN3_PGALLOC_H
12 #define _SUN3_PGALLOC_H
13
14 #include <asm/tlb.h>
15
16 #include <asm-generic/pgalloc.h>
17
18 extern const char bad_pmd_string[];
19
20 #define __pte_free_tlb(tlb,pte,addr) \
21 do { \
22 pgtable_pte_page_dtor(pte); \
23 tlb_remove_page((tlb), pte); \
24 } while (0)
25
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmd,pte_t * pte)26 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
27 {
28 pmd_val(*pmd) = __pa((unsigned long)pte);
29 }
30
pmd_populate(struct mm_struct * mm,pmd_t * pmd,pgtable_t page)31 static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
32 {
33 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
34 }
35 #define pmd_pgtable(pmd) pmd_page(pmd)
36
37 /*
38 * allocating and freeing a pmd is trivial: the 1-entry pmd is
39 * inside the pgd, so has no extra memory associated with it.
40 */
41 #define pmd_free(mm, x) do { } while (0)
42
pgd_alloc(struct mm_struct * mm)43 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
44 {
45 pgd_t *new_pgd;
46
47 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
48 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
49 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
50 return new_pgd;
51 }
52
53 #endif /* SUN3_PGALLOC_H */
54