sun3_pgalloc.h

 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
18extern const char bad_pmd_string[];
19
20#define __pte_free_tlb(tlb, pte, addr)	\
21	tlb_remove_ptdesc((tlb), page_ptdesc(pte))
22
23static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
24{
25	pmd_val(*pmd) = __pa((unsigned long)pte);
26}
27
28static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
29{
30	pmd_val(*pmd) = __pa((unsigned long)page_address(page));
31}
32
33/*
34 * allocating and freeing a pmd is trivial: the 1-entry pmd is
35 * inside the pgd, so has no extra memory associated with it.
36 */
37#define pmd_free(mm, x)			do { } while (0)
38
39static inline pgd_t * pgd_alloc(struct mm_struct *mm)
40{
41	pgd_t *new_pgd;
42
43	new_pgd = __pgd_alloc(mm, 0);
44	if (likely(new_pgd != NULL)) {
45		memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
46		memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
47	}
48	return new_pgd;
49}
50
51#endif /* SUN3_PGALLOC_H */