Don't include linux/config.h from anywhere else in include/
[linux-2.6.git] / include / asm-ia64 / pgalloc.h
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
22 #include <asm/mmu_context.h>
23
24 DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist);
25 #define pgtable_quicklist __ia64_per_cpu_var(__pgtable_quicklist)
26 DECLARE_PER_CPU(long, __pgtable_quicklist_size);
27 #define pgtable_quicklist_size __ia64_per_cpu_var(__pgtable_quicklist_size)
28
29 static inline long pgtable_quicklist_total_size(void)
30 {
31         long ql_size = 0;
32         int cpuid;
33
34         for_each_online_cpu(cpuid) {
35                 ql_size += per_cpu(__pgtable_quicklist_size, cpuid);
36         }
37         return ql_size;
38 }
39
40 static inline void *pgtable_quicklist_alloc(void)
41 {
42         unsigned long *ret = NULL;
43
44         preempt_disable();
45
46         ret = pgtable_quicklist;
47         if (likely(ret != NULL)) {
48                 pgtable_quicklist = (unsigned long *)(*ret);
49                 ret[0] = 0;
50                 --pgtable_quicklist_size;
51                 preempt_enable();
52         } else {
53                 preempt_enable();
54                 ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
55         }
56
57         return ret;
58 }
59
60 static inline void pgtable_quicklist_free(void *pgtable_entry)
61 {
62 #ifdef CONFIG_NUMA
63         unsigned long nid = page_to_nid(virt_to_page(pgtable_entry));
64
65         if (unlikely(nid != numa_node_id())) {
66                 free_page((unsigned long)pgtable_entry);
67                 return;
68         }
69 #endif
70
71         preempt_disable();
72         *(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist;
73         pgtable_quicklist = (unsigned long *)pgtable_entry;
74         ++pgtable_quicklist_size;
75         preempt_enable();
76 }
77
78 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
79 {
80         return pgtable_quicklist_alloc();
81 }
82
83 static inline void pgd_free(pgd_t * pgd)
84 {
85         pgtable_quicklist_free(pgd);
86 }
87
88 #ifdef CONFIG_PGTABLE_4
89 static inline void
90 pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
91 {
92         pgd_val(*pgd_entry) = __pa(pud);
93 }
94
95 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
96 {
97         return pgtable_quicklist_alloc();
98 }
99
100 static inline void pud_free(pud_t * pud)
101 {
102         pgtable_quicklist_free(pud);
103 }
104 #define __pud_free_tlb(tlb, pud)        pud_free(pud)
105 #endif /* CONFIG_PGTABLE_4 */
106
107 static inline void
108 pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
109 {
110         pud_val(*pud_entry) = __pa(pmd);
111 }
112
113 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
114 {
115         return pgtable_quicklist_alloc();
116 }
117
118 static inline void pmd_free(pmd_t * pmd)
119 {
120         pgtable_quicklist_free(pmd);
121 }
122
123 #define __pmd_free_tlb(tlb, pmd)        pmd_free(pmd)
124
125 static inline void
126 pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte)
127 {
128         pmd_val(*pmd_entry) = page_to_phys(pte);
129 }
130
131 static inline void
132 pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
133 {
134         pmd_val(*pmd_entry) = __pa(pte);
135 }
136
137 static inline struct page *pte_alloc_one(struct mm_struct *mm,
138                                          unsigned long addr)
139 {
140         return virt_to_page(pgtable_quicklist_alloc());
141 }
142
143 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
144                                           unsigned long addr)
145 {
146         return pgtable_quicklist_alloc();
147 }
148
149 static inline void pte_free(struct page *pte)
150 {
151         pgtable_quicklist_free(page_address(pte));
152 }
153
154 static inline void pte_free_kernel(pte_t * pte)
155 {
156         pgtable_quicklist_free(pte);
157 }
158
159 #define __pte_free_tlb(tlb, pte)        pte_free(pte)
160
161 extern void check_pgt_cache(void);
162
163 #endif                          /* _ASM_IA64_PGALLOC_H */