[linux-block.git] / arch / alpha / include / asm / pgalloc.h

/* 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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _ALPHA_PGALLOC_H
	3	#define _ALPHA_PGALLOC_H
	4
1da177e4 LT	5	#include <linux/mm.h>
	6	#include <linux/mmzone.h>
	7
	8	/*
	9	* Allocate and free page tables. The xxx_kernel() versions are
	10	* used to allocate a kernel page table - this turns on ASN bits
	11	* if any.
	12	*/
	13
	14	static inline void
2f569afd	15	pmd_populate(struct mm_struct mm, pmd_t pmd, pgtable_t pte)
1da177e4 LT	16	{
	17	pmd_set(pmd, (pte_t *)(page_to_pa(pte) + PAGE_OFFSET));
	18	}
2f569afd	19	#define pmd_pgtable(pmd) pmd_page(pmd)
1da177e4 LT	20
	21	static inline void
	22	pmd_populate_kernel(struct mm_struct mm, pmd_t pmd, pte_t *pte)
	23	{
	24	pmd_set(pmd, pte);
	25	}
	26
	27	static inline void
	28	pgd_populate(struct mm_struct mm, pgd_t pgd, pmd_t *pmd)
	29	{
	30	pgd_set(pgd, pmd);
	31	}
	32
	33	extern pgd_t pgd_alloc(struct mm_struct mm);
	34
	35	static inline void
5e541973	36	pgd_free(struct mm_struct mm, pgd_t pgd)
1da177e4 LT	37	{
	38	free_page((unsigned long)pgd);
	39	}
	40
	41	static inline pmd_t *
	42	pmd_alloc_one(struct mm_struct *mm, unsigned long address)
	43	{
32d6bd90	44	pmd_t ret = (pmd_t )__get_free_page(GFP_KERNEL\|__GFP_ZERO);
1da177e4 LT	45	return ret;
	46	}
	47
	48	static inline void
5e541973	49	pmd_free(struct mm_struct mm, pmd_t pmd)
1da177e4 LT	50	{
	51	free_page((unsigned long)pmd);
	52	}
	53
5da7f3d7 IK	54	static inline pte_t *
	55	pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
	56	{
32d6bd90	57	pte_t pte = (pte_t )__get_free_page(GFP_KERNEL\|__GFP_ZERO);
5da7f3d7 IK	58	return pte;
5da7f3d7 IK	59	}
1da177e4 LT	60
1da177e4 LT	61	static inline void
5e541973	62	pte_free_kernel(struct mm_struct mm, pte_t pte)
1da177e4 LT	63	{
	64	free_page((unsigned long)pte);
	65	}
	66
2f569afd MS	67	static inline pgtable_t
2f569afd MS	68	pte_alloc_one(struct mm_struct *mm, unsigned long address)
1da177e4	69	{
2f569afd MS	70	pte_t *pte = pte_alloc_one_kernel(mm, address);
	71	struct page *page;
	72
	73	if (!pte)
	74	return NULL;
	75	page = virt_to_page(pte);
3fd681b6 KS	76	if (!pgtable_page_ctor(page)) {
	77	__free_page(page);
	78	return NULL;
	79	}
2f569afd	80	return page;
1da177e4 LT	81	}
	82
	83	static inline void
2f569afd	84	pte_free(struct mm_struct *mm, pgtable_t page)
1da177e4	85	{
2f569afd	86	pgtable_page_dtor(page);
1da177e4 LT	87	__free_page(page);
	88	}
	89
	90	#define check_pgt_cache() do { } while (0)
	91
	92	#endif /* _ALPHA_PGALLOC_H */