1#ifndef M68K_MCF_PGALLOC_H
2#define M68K_MCF_PGALLOC_H
3
4#include <asm/tlb.h>
5#include <asm/tlbflush.h>
6
7extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
8{
9	free_page((unsigned long) pte);
10}
11
12extern const char bad_pmd_string[];
13
14extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
15	unsigned long address)
16{
17	unsigned long page = __get_free_page(GFP_DMA|__GFP_REPEAT);
18
19	if (!page)
20		return NULL;
21
22	memset((void *)page, 0, PAGE_SIZE);
23	return (pte_t *) (page);
24}
25
26extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
27{
28	return (pmd_t *) pgd;
29}
30
31#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
32#define pmd_alloc_one(mm, address)      ({ BUG(); ((pmd_t *)2); })
33
34#define pte_alloc_one_fast(mm, addr) pte_alloc_one(mm, addr)
35
36#define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \
37	(unsigned long)(page_address(page)))
38
39#define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
40
41#define pmd_pgtable(pmd) pmd_page(pmd)
42
43static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t page,
44				  unsigned long address)
45{
46	__free_page(page);
47}
48
49#define __pmd_free_tlb(tlb, pmd, address) do { } while (0)
50
51static inline struct page *pte_alloc_one(struct mm_struct *mm,
52	unsigned long address)
53{
54	struct page *page = alloc_pages(GFP_DMA|__GFP_REPEAT, 0);
55	pte_t *pte;
56
57	if (!page)
58		return NULL;
59	if (!pgtable_page_ctor(page)) {
60		__free_page(page);
61		return NULL;
62	}
63
64	pte = kmap(page);
65	if (pte) {
66		clear_page(pte);
67		__flush_page_to_ram(pte);
68		flush_tlb_kernel_page(pte);
69		nocache_page(pte);
70	}
71	kunmap(page);
72
73	return page;
74}
75
76extern inline void pte_free(struct mm_struct *mm, struct page *page)
77{
78	__free_page(page);
79}
80
81/*
82 * In our implementation, each pgd entry contains 1 pmd that is never allocated
83 * or freed.  pgd_present is always 1, so this should never be called. -NL
84 */
85#define pmd_free(mm, pmd) BUG()
86
87static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
88{
89	free_page((unsigned long) pgd);
90}
91
92static inline pgd_t *pgd_alloc(struct mm_struct *mm)
93{
94	pgd_t *new_pgd;
95
96	new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
97	if (!new_pgd)
98		return NULL;
99	memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
100	memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
101	return new_pgd;
102}
103
104#define pgd_populate(mm, pmd, pte) BUG()
105
106#endif /* M68K_MCF_PGALLOC_H */
107