1#ifndef _ASM_IA64_PGALLOC_H
2#define _ASM_IA64_PGALLOC_H
3
4/*
5 * This file contains the functions and defines necessary to allocate
6 * page tables.
7 *
8 * This hopefully works with any (fixed) ia-64 page-size, as defined
9 * in <asm/page.h> (currently 8192).
10 *
11 * Copyright (C) 1998-2001 Hewlett-Packard Co
12 *	David Mosberger-Tang <davidm@hpl.hp.com>
13 * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com>
14 */
15
16
17#include <linux/compiler.h>
18#include <linux/mm.h>
19#include <linux/page-flags.h>
20#include <linux/threads.h>
21#include <linux/quicklist.h>
22
23#include <asm/mmu_context.h>
24
25static inline pgd_t *pgd_alloc(struct mm_struct *mm)
26{
27	return quicklist_alloc(0, GFP_KERNEL, NULL);
28}
29
30static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
31{
32	quicklist_free(0, NULL, pgd);
33}
34
35#ifdef CONFIG_PGTABLE_4
36static inline void
37pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
38{
39	pgd_val(*pgd_entry) = __pa(pud);
40}
41
42static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
43{
44	return quicklist_alloc(0, GFP_KERNEL, NULL);
45}
46
47static inline void pud_free(struct mm_struct *mm, pud_t *pud)
48{
49	quicklist_free(0, NULL, pud);
50}
51#define __pud_free_tlb(tlb, pud, address)	pud_free((tlb)->mm, pud)
52#endif /* CONFIG_PGTABLE_4 */
53
54static inline void
55pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
56{
57	pud_val(*pud_entry) = __pa(pmd);
58}
59
60static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
61{
62	return quicklist_alloc(0, GFP_KERNEL, NULL);
63}
64
65static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
66{
67	quicklist_free(0, NULL, pmd);
68}
69
70#define __pmd_free_tlb(tlb, pmd, address)	pmd_free((tlb)->mm, pmd)
71
72static inline void
73pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
74{
75	pmd_val(*pmd_entry) = page_to_phys(pte);
76}
77#define pmd_pgtable(pmd) pmd_page(pmd)
78
79static inline void
80pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
81{
82	pmd_val(*pmd_entry) = __pa(pte);
83}
84
85static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr)
86{
87	struct page *page;
88	void *pg;
89
90	pg = quicklist_alloc(0, GFP_KERNEL, NULL);
91	if (!pg)
92		return NULL;
93	page = virt_to_page(pg);
94	if (!pgtable_page_ctor(page)) {
95		quicklist_free(0, NULL, pg);
96		return NULL;
97	}
98	return page;
99}
100
101static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
102					  unsigned long addr)
103{
104	return quicklist_alloc(0, GFP_KERNEL, NULL);
105}
106
107static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
108{
109	pgtable_page_dtor(pte);
110	quicklist_free_page(0, NULL, pte);
111}
112
113static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
114{
115	quicklist_free(0, NULL, pte);
116}
117
118static inline void check_pgt_cache(void)
119{
120	quicklist_trim(0, NULL, 25, 16);
121}
122
123#define __pte_free_tlb(tlb, pte, address)	pte_free((tlb)->mm, pte)
124
125#endif				/* _ASM_IA64_PGALLOC_H */
126