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)				\
21do {								\
22	pagetable_pte_dtor(page_ptdesc(pte));			\
23	tlb_remove_page_ptdesc((tlb), page_ptdesc(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
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
42static 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 */

 
  1/* sun3_pgalloc.h --
  2 * reorganization around 2.3.39, routines moved from sun3_pgtable.h
  3 *
  4 *
  5 * 02/27/2002 -- Modified to support "highpte" implementation in 2.5.5 (Sam)
  6 *
  7 * moved 1/26/2000 Sam Creasey
  8 */
  9
 10#ifndef _SUN3_PGALLOC_H
 11#define _SUN3_PGALLOC_H
 12
 13#include <asm/tlb.h>
 14
 
 
 15extern const char bad_pmd_string[];
 16
 17#define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); })
 18
 19
 20static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 21{
 22        free_page((unsigned long) pte);
 23}
 24
 25static inline void pte_free(struct mm_struct *mm, pgtable_t page)
 26{
 27	pgtable_page_dtor(page);
 28        __free_page(page);
 29}
 30
 31#define __pte_free_tlb(tlb,pte,addr)			\
 32do {							\
 33	pgtable_page_dtor(pte);				\
 34	tlb_remove_page((tlb), pte);			\
 35} while (0)
 36
 37static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 38					  unsigned long address)
 39{
 40	unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT);
 41
 42	if (!page)
 43		return NULL;
 44
 45	memset((void *)page, 0, PAGE_SIZE);
 46	return (pte_t *) (page);
 47}
 48
 49static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
 50					unsigned long address)
 51{
 52        struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
 53
 54	if (page == NULL)
 55		return NULL;
 56
 57	clear_highpage(page);
 58	if (!pgtable_page_ctor(page)) {
 59		__free_page(page);
 60		return NULL;
 61	}
 62	return page;
 63
 64}
 65
 66static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 67{
 68	pmd_val(*pmd) = __pa((unsigned long)pte);
 69}
 70
 71static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
 72{
 73	pmd_val(*pmd) = __pa((unsigned long)page_address(page));
 74}
 75#define pmd_pgtable(pmd) pmd_page(pmd)
 76
 77/*
 78 * allocating and freeing a pmd is trivial: the 1-entry pmd is
 79 * inside the pgd, so has no extra memory associated with it.
 80 */
 81#define pmd_free(mm, x)			do { } while (0)
 82#define __pmd_free_tlb(tlb, x, addr)	do { } while (0)
 83
 84static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 85{
 86        free_page((unsigned long) pgd);
 87}
 88
 89static inline pgd_t * pgd_alloc(struct mm_struct *mm)
 90{
 91     pgd_t *new_pgd;
 92
 93     new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
 94     memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
 95     memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
 96     return new_pgd;
 97}
 98
 99#define pgd_populate(mm, pmd, pte) BUG()
100
101#endif /* SUN3_PGALLOC_H */