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1da177e4 LT |
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 | #include <linux/config.h> | |
17 | ||
18 | #include <linux/compiler.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/page-flags.h> | |
21 | #include <linux/threads.h> | |
22 | ||
23 | #include <asm/mmu_context.h> | |
24 | ||
fde740e4 RH |
25 | DECLARE_PER_CPU(unsigned long *, __pgtable_quicklist); |
26 | #define pgtable_quicklist __ia64_per_cpu_var(__pgtable_quicklist) | |
27 | DECLARE_PER_CPU(long, __pgtable_quicklist_size); | |
28 | #define pgtable_quicklist_size __ia64_per_cpu_var(__pgtable_quicklist_size) | |
1da177e4 | 29 | |
fde740e4 RH |
30 | static inline long pgtable_quicklist_total_size(void) |
31 | { | |
c411cb56 | 32 | long ql_size = 0; |
fde740e4 RH |
33 | int cpuid; |
34 | ||
35 | for_each_online_cpu(cpuid) { | |
36 | ql_size += per_cpu(__pgtable_quicklist_size, cpuid); | |
37 | } | |
38 | return ql_size; | |
39 | } | |
40 | ||
41 | static inline void *pgtable_quicklist_alloc(void) | |
1da177e4 LT |
42 | { |
43 | unsigned long *ret = NULL; | |
44 | ||
45 | preempt_disable(); | |
46 | ||
fde740e4 | 47 | ret = pgtable_quicklist; |
1da177e4 | 48 | if (likely(ret != NULL)) { |
fde740e4 | 49 | pgtable_quicklist = (unsigned long *)(*ret); |
1da177e4 | 50 | ret[0] = 0; |
fde740e4 | 51 | --pgtable_quicklist_size; |
2d29306b | 52 | preempt_enable(); |
fde740e4 | 53 | } else { |
2d29306b | 54 | preempt_enable(); |
fde740e4 RH |
55 | ret = (unsigned long *)__get_free_page(GFP_KERNEL | __GFP_ZERO); |
56 | } | |
1da177e4 | 57 | |
fde740e4 | 58 | return ret; |
1da177e4 LT |
59 | } |
60 | ||
fde740e4 | 61 | static inline void pgtable_quicklist_free(void *pgtable_entry) |
1da177e4 | 62 | { |
fde740e4 RH |
63 | #ifdef CONFIG_NUMA |
64 | unsigned long nid = page_to_nid(virt_to_page(pgtable_entry)); | |
1da177e4 | 65 | |
fde740e4 RH |
66 | if (unlikely(nid != numa_node_id())) { |
67 | free_page((unsigned long)pgtable_entry); | |
68 | return; | |
1da177e4 | 69 | } |
fde740e4 | 70 | #endif |
1da177e4 | 71 | |
1da177e4 | 72 | preempt_disable(); |
fde740e4 RH |
73 | *(unsigned long *)pgtable_entry = (unsigned long)pgtable_quicklist; |
74 | pgtable_quicklist = (unsigned long *)pgtable_entry; | |
75 | ++pgtable_quicklist_size; | |
1da177e4 LT |
76 | preempt_enable(); |
77 | } | |
78 | ||
fde740e4 | 79 | static inline pgd_t *pgd_alloc(struct mm_struct *mm) |
1da177e4 | 80 | { |
fde740e4 | 81 | return pgtable_quicklist_alloc(); |
1da177e4 LT |
82 | } |
83 | ||
fde740e4 | 84 | static inline void pgd_free(pgd_t * pgd) |
1da177e4 | 85 | { |
fde740e4 | 86 | pgtable_quicklist_free(pgd); |
1da177e4 LT |
87 | } |
88 | ||
fde740e4 RH |
89 | static inline void |
90 | pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd) | |
1da177e4 | 91 | { |
fde740e4 RH |
92 | pud_val(*pud_entry) = __pa(pmd); |
93 | } | |
1da177e4 | 94 | |
fde740e4 RH |
95 | static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr) |
96 | { | |
97 | return pgtable_quicklist_alloc(); | |
1da177e4 LT |
98 | } |
99 | ||
fde740e4 | 100 | static inline void pmd_free(pmd_t * pmd) |
1da177e4 | 101 | { |
fde740e4 | 102 | pgtable_quicklist_free(pmd); |
1da177e4 LT |
103 | } |
104 | ||
105 | #define __pmd_free_tlb(tlb, pmd) pmd_free(pmd) | |
106 | ||
107 | static inline void | |
fde740e4 | 108 | pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, struct page *pte) |
1da177e4 LT |
109 | { |
110 | pmd_val(*pmd_entry) = page_to_phys(pte); | |
111 | } | |
112 | ||
113 | static inline void | |
fde740e4 | 114 | pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte) |
1da177e4 LT |
115 | { |
116 | pmd_val(*pmd_entry) = __pa(pte); | |
117 | } | |
118 | ||
fde740e4 RH |
119 | static inline struct page *pte_alloc_one(struct mm_struct *mm, |
120 | unsigned long addr) | |
1da177e4 | 121 | { |
fde740e4 | 122 | return virt_to_page(pgtable_quicklist_alloc()); |
1da177e4 LT |
123 | } |
124 | ||
fde740e4 RH |
125 | static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, |
126 | unsigned long addr) | |
1da177e4 | 127 | { |
fde740e4 | 128 | return pgtable_quicklist_alloc(); |
1da177e4 LT |
129 | } |
130 | ||
fde740e4 | 131 | static inline void pte_free(struct page *pte) |
1da177e4 | 132 | { |
fde740e4 | 133 | pgtable_quicklist_free(page_address(pte)); |
1da177e4 LT |
134 | } |
135 | ||
fde740e4 | 136 | static inline void pte_free_kernel(pte_t * pte) |
1da177e4 | 137 | { |
fde740e4 | 138 | pgtable_quicklist_free(pte); |
1da177e4 LT |
139 | } |
140 | ||
fde740e4 | 141 | #define __pte_free_tlb(tlb, pte) pte_free(pte) |
1da177e4 | 142 | |
fde740e4 | 143 | extern void check_pgt_cache(void); |
1da177e4 | 144 | |
fde740e4 | 145 | #endif /* _ASM_IA64_PGALLOC_H */ |