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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> /* for pte_{alloc,free}_one */
17
18extern const char bad_pmd_string[];
19
20#define pmd_alloc_one(mm,address) ({ BUG(); ((pmd_t *)2); })
21
22#define __pte_free_tlb(tlb,pte,addr) \
23do { \
24 pgtable_pte_page_dtor(pte); \
25 tlb_remove_page((tlb), pte); \
26} while (0)
27
28static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
29{
30 pmd_val(*pmd) = __pa((unsigned long)pte);
31}
32
33static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
34{
35 pmd_val(*pmd) = __pa((unsigned long)page_address(page));
36}
37#define pmd_pgtable(pmd) pmd_page(pmd)
38
39/*
40 * allocating and freeing a pmd is trivial: the 1-entry pmd is
41 * inside the pgd, so has no extra memory associated with it.
42 */
43#define pmd_free(mm, x) do { } while (0)
44#define __pmd_free_tlb(tlb, x, addr) do { } while (0)
45
46static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
47{
48 free_page((unsigned long) pgd);
49}
50
51static inline pgd_t * pgd_alloc(struct mm_struct *mm)
52{
53 pgd_t *new_pgd;
54
55 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
56 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
57 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
58 return new_pgd;
59}
60
61#define pgd_populate(mm, pmd, pte) BUG()
62
63#endif /* SUN3_PGALLOC_H */