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
pgd_alloc(struct mm_struct * mm)25 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
26 {
27 return quicklist_alloc(0, GFP_KERNEL, NULL);
28 }
29
pgd_free(struct mm_struct * mm,pgd_t * pgd)30 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
31 {
32 quicklist_free(0, NULL, pgd);
33 }
34
35 #if CONFIG_PGTABLE_LEVELS == 4
36 static inline void
pgd_populate(struct mm_struct * mm,pgd_t * pgd_entry,pud_t * pud)37 pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
38 {
39 pgd_val(*pgd_entry) = __pa(pud);
40 }
41
pud_alloc_one(struct mm_struct * mm,unsigned long addr)42 static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
43 {
44 return quicklist_alloc(0, GFP_KERNEL, NULL);
45 }
46
pud_free(struct mm_struct * mm,pud_t * pud)47 static 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_LEVELS == 4 */
53
54 static inline void
pud_populate(struct mm_struct * mm,pud_t * pud_entry,pmd_t * pmd)55 pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
56 {
57 pud_val(*pud_entry) = __pa(pmd);
58 }
59
pmd_alloc_one(struct mm_struct * mm,unsigned long addr)60 static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
61 {
62 return quicklist_alloc(0, GFP_KERNEL, NULL);
63 }
64
pmd_free(struct mm_struct * mm,pmd_t * pmd)65 static 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
72 static inline void
pmd_populate(struct mm_struct * mm,pmd_t * pmd_entry,pgtable_t pte)73 pmd_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
79 static inline void
pmd_populate_kernel(struct mm_struct * mm,pmd_t * pmd_entry,pte_t * pte)80 pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
81 {
82 pmd_val(*pmd_entry) = __pa(pte);
83 }
84
pte_alloc_one(struct mm_struct * mm,unsigned long addr)85 static 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
pte_alloc_one_kernel(struct mm_struct * mm,unsigned long addr)101 static 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
pte_free(struct mm_struct * mm,pgtable_t pte)107 static 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
pte_free_kernel(struct mm_struct * mm,pte_t * pte)113 static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
114 {
115 quicklist_free(0, NULL, pte);
116 }
117
check_pgt_cache(void)118 static 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