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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* include/asm-xtensa/pgalloc.h
*
* Copyright (C) 2001-2007 Tensilica Inc.
*/
#ifndef _XTENSA_PGALLOC_H
#define _XTENSA_PGALLOC_H
#ifdef CONFIG_MMU
#include <linux/highmem.h>
#include <linux/slab.h>
#define __HAVE_ARCH_PTE_ALLOC_ONE_KERNEL
#define __HAVE_ARCH_PTE_ALLOC_ONE
#include <asm-generic/pgalloc.h>
/*
* Allocating and freeing a pmd is trivial: the 1-entry pmd is
* inside the pgd, so has no extra memory associated with it.
*/
#define pmd_populate_kernel(mm, pmdp, ptep) \
(pmd_val(*(pmdp)) = ((unsigned long)ptep))
#define pmd_populate(mm, pmdp, page) \
(pmd_val(*(pmdp)) = ((unsigned long)page_to_virt(page)))
static inline pgd_t*
pgd_alloc(struct mm_struct *mm)
{
return (pgd_t*) __get_free_page(GFP_KERNEL | __GFP_ZERO);
}
static inline void ptes_clear(pte_t *ptep)
{
int i;
for (i = 0; i < PTRS_PER_PTE; i++)
pte_clear(NULL, 0, ptep + i);
}
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
{
pte_t *ptep;
ptep = (pte_t *)__pte_alloc_one_kernel(mm);
if (!ptep)
return NULL;
ptes_clear(ptep);
return ptep;
}
static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
{
struct page *page;
page = __pte_alloc_one(mm, GFP_PGTABLE_USER);
if (!page)
return NULL;
ptes_clear(page_address(page));
return page;
}
#endif /* CONFIG_MMU */
#endif /* _XTENSA_PGALLOC_H */