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
 15/* FIXME - when we get this compiling */
 16/* erm, now that it's compiling, what do we do with it? */
 17#define _KERNPG_TABLE 0
 18
 19extern const char bad_pmd_string[];
 20
 21#define pmd_alloc_one(mm,address)       ({ BUG(); ((pmd_t *)2); })
 22
 23
 24static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 25{
 26        free_page((unsigned long) pte);
 27}
 28
 29static inline void pte_free(struct mm_struct *mm, pgtable_t page)
 30{
 31	pgtable_page_dtor(page);
 32        __free_page(page);
 33}
 34
 35#define __pte_free_tlb(tlb,pte,addr)			\
 36do {							\
 37	pgtable_page_dtor(pte);				\
 38	tlb_remove_page((tlb), pte);			\
 39} while (0)
 40
 41static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
 42					  unsigned long address)
 43{
 44	unsigned long page = __get_free_page(GFP_KERNEL|__GFP_REPEAT);
 45
 46	if (!page)
 47		return NULL;
 48
 49	memset((void *)page, 0, PAGE_SIZE);
 50	return (pte_t *) (page);
 51}
 52
 53static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
 54					unsigned long address)
 55{
 56        struct page *page = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
 57
 58	if (page == NULL)
 59		return NULL;
 60
 61	clear_highpage(page);
 62	if (!pgtable_page_ctor(page)) {
 63		__free_page(page);
 64		return NULL;
 65	}
 66	return page;
 67
 68}
 69
 70static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
 71{
 72	pmd_val(*pmd) = __pa((unsigned long)pte);
 73}
 74
 75static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
 76{
 77	pmd_val(*pmd) = __pa((unsigned long)page_address(page));
 78}
 79#define pmd_pgtable(pmd) pmd_page(pmd)
 80
 81/*
 82 * allocating and freeing a pmd is trivial: the 1-entry pmd is
 83 * inside the pgd, so has no extra memory associated with it.
 84 */
 85#define pmd_free(mm, x)			do { } while (0)
 86#define __pmd_free_tlb(tlb, x, addr)	do { } while (0)
 87
 88static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 89{
 90        free_page((unsigned long) pgd);
 91}
 92
 93static inline pgd_t * pgd_alloc(struct mm_struct *mm)
 94{
 95     pgd_t *new_pgd;
 96
 97     new_pgd = (pgd_t *)get_zeroed_page(GFP_KERNEL);
 98     memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
 99     memset(new_pgd, 0, (PAGE_OFFSET >> PGDIR_SHIFT));
100     return new_pgd;
101}
102
103#define pgd_populate(mm, pmd, pte) BUG()
104
105#endif /* SUN3_PGALLOC_H */