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
23#include <asm-generic/pgalloc.h>
24
25#include <asm/mmu_context.h>
26
27static inline pgd_t *pgd_alloc(struct mm_struct *mm)
28{
29	return (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
30}
31
32static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
33{
34	free_page((unsigned long)pgd);
35}
36
37#if CONFIG_PGTABLE_LEVELS == 4
38static inline void
39pgd_populate(struct mm_struct *mm, pgd_t * pgd_entry, pud_t * pud)
40{
41	pgd_val(*pgd_entry) = __pa(pud);
42}
43
44static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
45{
46	return (pud_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
47}
48
49static inline void pud_free(struct mm_struct *mm, pud_t *pud)
50{
51	free_page((unsigned long)pud);
52}
53#define __pud_free_tlb(tlb, pud, address)	pud_free((tlb)->mm, pud)
54#endif /* CONFIG_PGTABLE_LEVELS == 4 */
55
56static inline void
57pud_populate(struct mm_struct *mm, pud_t * pud_entry, pmd_t * pmd)
58{
59	pud_val(*pud_entry) = __pa(pmd);
60}
61
62static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long addr)
63{
64	return (pmd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
65}
66
67static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
68{
69	free_page((unsigned long)pmd);
70}
71
72#define __pmd_free_tlb(tlb, pmd, address)	pmd_free((tlb)->mm, pmd)
73
74static inline void
75pmd_populate(struct mm_struct *mm, pmd_t * pmd_entry, pgtable_t pte)
76{
77	pmd_val(*pmd_entry) = page_to_phys(pte);
78}
79#define pmd_pgtable(pmd) pmd_page(pmd)
80
81static inline void
82pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmd_entry, pte_t * pte)
83{
84	pmd_val(*pmd_entry) = __pa(pte);
85}
86
87#define __pte_free_tlb(tlb, pte, address)	pte_free((tlb)->mm, pte)
88
89#endif				/* _ASM_IA64_PGALLOC_H */