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 pagetable_pte_dtor(page_ptdesc(pte)); \
23 tlb_remove_page_ptdesc((tlb), page_ptdesc(pte)); \
24 } while (0)
25
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
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
36 /*
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.
39 */
40 #define pmd_free(mm, x) do { } while (0)
41
42 static inline pgd_t * pgd_alloc(struct mm_struct *mm)
43 {
44 pgd_t *new_pgd;
45
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));
49 return new_pgd;
50 }
51
52 #endif /* SUN3_PGALLOC_H */
53
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