Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 __pte_free_tlb(tlb,pte,addr) \
21do { \
22 pgtable_pte_page_dtor(pte); \
23 tlb_remove_page((tlb), pte); \
24} while (0)
25
26static 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
31static 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
43static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
44{
45 free_page((unsigned long) pgd);
46}
47
48static inline pgd_t * pgd_alloc(struct mm_struct *mm)
49{
50 pgd_t *new_pgd;
51
52 new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
53 memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
54 memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
55 return new_pgd;
56}
57
58#endif /* SUN3_PGALLOC_H */