Viewing file:  pgalloc.h (1.82 KB) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ALPHA_PGALLOC_H
#define _ALPHA_PGALLOC_H
#include <linux/mm.h>
#include <linux/mmzone.h>
/*
* Allocate and free page tables. The xxx_kernel() versions are
* used to allocate a kernel page table - this turns on ASN bits
* if any.
*/
static inline void
pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t pte)
{
pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
}
#define pmd_pgtable(pmd) pmd_page(pmd)
static inline void
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
{
pmd_set(pmd, pte);
}
static inline void
pgd_populate(struct mm_struct *mm, pgd_t *pgd, pmd_t *pmd)
{
pgd_set(pgd, pmd);
}
extern pgd_t *pgd_alloc(struct mm_struct *mm);
static inline void
pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
free_page((unsigned long)pgd);
}
static inline pmd_t *
pmd_alloc_one(struct mm_struct *mm, unsigned long address)
{
pmd_t *ret = (pmd_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
return ret;
}
static inline void
pmd_free(struct mm_struct *mm, pmd_t *pmd)
{
free_page((unsigned long)pmd);
}
static inline pte_t *
pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
{
pte_t *pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_ZERO);
return pte;
}
static inline void
pte_free_kernel(struct mm_struct *mm, pte_t *pte)
{
free_page((unsigned long)pte);
}
static inline pgtable_t
pte_alloc_one(struct mm_struct *mm, unsigned long address)
{
pte_t *pte = pte_alloc_one_kernel(mm, address);
struct page *page;
if (!pte)
return NULL;
page = virt_to_page(pte);
if (!pgtable_page_ctor(page)) {
__free_page(page);
return NULL;
}
return page;
}
static inline void
pte_free(struct mm_struct *mm, pgtable_t page)
{
pgtable_page_dtor(page);
__free_page(page);
}
#define check_pgt_cache() do { } while (0)
#endif /* _ALPHA_PGALLOC_H */
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