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, unsigned long addr)
 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					  unsigned long addr)
104{
105	return quicklist_alloc(0, GFP_KERNEL, NULL);
106}
107
108static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
109{
110	pgtable_page_dtor(pte);
111	quicklist_free_page(0, NULL, pte);
112}
113
114static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
115{
116	quicklist_free(0, NULL, pte);
117}
118
119static inline void check_pgt_cache(void)
120{
121	quicklist_trim(0, NULL, 25, 16);
122}
123
124#define __pte_free_tlb(tlb, pte, address)	pte_free((tlb)->mm, pte)
125
126#endif				/* _ASM_IA64_PGALLOC_H */