Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_IA64_PGALLOC_H
3#define _ASM_IA64_PGALLOC_H
4
5/*
6 * This file contains the functions and defines necessary to allocate
7 * page tables.
8 *
9 * This hopefully works with any (fixed) ia-64 page-size, as defined
10 * in <asm/page.h> (currently 8192).
11 *
12 * Copyright (C) 1998-2001 Hewlett-Packard Co
13 * David Mosberger-Tang <davidm@hpl.hp.com>
14 * Copyright (C) 2000, Goutham Rao <goutham.rao@intel.com>
15 */
16
17
18#include <linux/compiler.h>
19#include <linux/mm.h>
20#include <linux/page-flags.h>
21#include <linux/threads.h>
22#include <linux/quicklist.h>
23
24#include <asm/mmu_context.h>
25
26static inline pgd_t *pgd_alloc(struct mm_struct *mm)
27{
28 return quicklist_alloc(0, GFP_KERNEL, NULL);
29}
30
31static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
32{
33 quicklist_free(0, NULL, pgd);
34}
35
36#if CONFIG_PGTABLE_LEVELS == 4
37static inline void
38pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
39{
40 pgd_val(*pgd_entry) = __pa(pud);
41}
42
43static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
44{
45 return quicklist_alloc(0, GFP_KERNEL, NULL);
46}
47
48static inline void pud_free(struct mm_struct *mm, pud_t *pud)
49{
50 quicklist_free(0, NULL, pud);
51}
52#define __pud_free_tlb(tlb, pud, address) pud_free((tlb)->mm, pud)
53#endif /* CONFIG_PGTABLE_LEVELS == 4 */
54
55static inline void
56pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
57{
58 pud_val(*pud_entry) = __pa(pmd);
59}
60
61static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
62{
63 return quicklist_alloc(0, GFP_KERNEL, NULL);
64}
65
66static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
67{
68 quicklist_free(0, NULL, pmd);
69}
70
71#define __pmd_free_tlb(tlb, pmd, address) pmd_free((tlb)->mm, pmd)
72
73static inline void
74pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
75{
76 pmd_val(*pmd_entry) = page_to_phys(pte);
77}
78#define pmd_pgtable(pmd) pmd_page(pmd)
79
80static inline void
81pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
82{
83 pmd_val(*pmd_entry) = __pa(pte);
84}
85
86static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
87{
88 struct page *page;
89 void *pg;
90
91 pg = quicklist_alloc(0, GFP_KERNEL, NULL);
92 if (!pg)
93 return NULL;
94 page = virt_to_page(pg);
95 if (!pgtable_page_ctor(page)) {
96 quicklist_free(0, NULL, pg);
97 return NULL;
98 }
99 return page;
100}
101
102static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
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 */