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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(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(pud_t * pud)
48{
49 quicklist_free(0, NULL, pud);
50}
51#define __pud_free_tlb(tlb, pud) pud_free(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(pmd_t * pmd)
66{
67 quicklist_free(0, NULL, pmd);
68}
69
70#define __pmd_free_tlb(tlb, pmd) pmd_free(pmd)
71
72static inline void
73pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte)
74{
75 pmd_val(*pmd_entry) = page_to_phys(pte);
76}
77
78static inline void
79pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
80{
81 pmd_val(*pmd_entry) = __pa(pte);
82}
83
84static inline struct page *pte_alloc_one(struct mm_struct *mm,
85 unsigned long addr)
86{
87 void *pg = quicklist_alloc(0, GFP_KERNEL, NULL);
88 return pg ? virt_to_page(pg) : NULL;
89}
90
91static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
92 unsigned long addr)
93{
94 return quicklist_alloc(0, GFP_KERNEL, NULL);
95}
96
97static inline void pte_free(struct page *pte)
98{
99 quicklist_free_page(0, NULL, pte);
100}
101
102static inline void pte_free_kernel(pte_t * pte)
103{
104 quicklist_free(0, NULL, pte);
105}
106
107static inline void check_pgt_cache(void)
108{
109 quicklist_trim(0, NULL, 25, 16);
110}
111
112#define __pte_free_tlb(tlb, pte) pte_free(pte)
113
114#endif /* _ASM_IA64_PGALLOC_H */