[linux-2.6-block.git] / arch / sh / mm / hugetlbpage.c

// SPDX-License-Identifier: GPL-2.0
/*
 * arch/sh/mm/hugetlbpage.c
 *
 * SuperH HugeTLB page support.
 *
 * Cloned from sparc64 by Paul Mundt.
 *
 * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
 */

#include <linux/init.h>
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/hugetlb.h>
#include <linux/pagemap.h>
#include <linux/sysctl.h>

#include <asm/mman.h>
#include <asm/tlb.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>

pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
			unsigned long addr, unsigned long sz)
{
	pgd_t *pgd;
	p4d_t *p4d;
	pud_t *pud;
	pmd_t *pmd;
	pte_t *pte = NULL;

	pgd = pgd_offset(mm, addr);
	if (pgd) {
		p4d = p4d_alloc(mm, pgd, addr);
		if (p4d) {
			pud = pud_alloc(mm, p4d, addr);
			if (pud) {
				pmd = pmd_alloc(mm, pud, addr);
				if (pmd)
					pte = pte_alloc_map(mm, pmd, addr);
			}
		}
	}

	return pte;
}

pte_t *huge_pte_offset(struct mm_struct *mm,
		       unsigned long addr, unsigned long sz)
{
	pgd_t *pgd;
	p4d_t *p4d;
	pud_t *pud;
	pmd_t *pmd;
	pte_t *pte = NULL;

	pgd = pgd_offset(mm, addr);
	if (pgd) {
		p4d = p4d_offset(pgd, addr);
		if (p4d) {
			pud = pud_offset(p4d, addr);
			if (pud) {
				pmd = pmd_offset(pud, addr);
				if (pmd)
					pte = pte_offset_map(pmd, addr);
			}
		}
	}

	return pte;
}

int pmd_huge(pmd_t pmd)
{
	return 0;
}

int pud_huge(pud_t pud)
{
	return 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* arch/sh/mm/hugetlbpage.c
	4	*
	5	* SuperH HugeTLB page support.
	6	*
	7	* Cloned from sparc64 by Paul Mundt.
	8	*
	9	* Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
	10	*/
	11
1da177e4 LT	12	#include <linux/init.h>
	13	#include <linux/fs.h>
	14	#include <linux/mm.h>
	15	#include <linux/hugetlb.h>
	16	#include <linux/pagemap.h>
1da177e4 LT	17	#include <linux/sysctl.h>
	18
	19	#include <asm/mman.h>
1da177e4 LT	20	#include <asm/tlb.h>
	21	#include <asm/tlbflush.h>
	22	#include <asm/cacheflush.h>
	23
aec44e0f	24	pte_t huge_pte_alloc(struct mm_struct mm, struct vm_area_struct *vma,
a5516438	25	unsigned long addr, unsigned long sz)
1da177e4 LT	26	{
1da177e4 LT	27	pgd_t *pgd;
874e2cc1	28	p4d_t *p4d;
3f787fe2	29	pud_t *pud;
1da177e4 LT	30	pmd_t *pmd;
	31	pte_t *pte = NULL;
	32
	33	pgd = pgd_offset(mm, addr);
	34	if (pgd) {
874e2cc1 MR	35	p4d = p4d_alloc(mm, pgd, addr);
	36	if (p4d) {
	37	pud = pud_alloc(mm, p4d, addr);
	38	if (pud) {
	39	pmd = pmd_alloc(mm, pud, addr);
	40	if (pmd)
	41	pte = pte_alloc_map(mm, pmd, addr);
	42	}
3f787fe2	43	}
1da177e4	44	}
3f787fe2	45
1da177e4 LT	46	return pte;
	47	}
	48
7868a208 PA	49	pte_t huge_pte_offset(struct mm_struct mm,
7868a208 PA	50	unsigned long addr, unsigned long sz)
1da177e4 LT	51	{
1da177e4 LT	52	pgd_t *pgd;
874e2cc1	53	p4d_t *p4d;
3f787fe2	54	pud_t *pud;
1da177e4 LT	55	pmd_t *pmd;
	56	pte_t *pte = NULL;
	57
	58	pgd = pgd_offset(mm, addr);
	59	if (pgd) {
874e2cc1 MR	60	p4d = p4d_offset(pgd, addr);
	61	if (p4d) {
	62	pud = pud_offset(p4d, addr);
	63	if (pud) {
	64	pmd = pmd_offset(pud, addr);
	65	if (pmd)
	66	pte = pte_offset_map(pmd, addr);
	67	}
3f787fe2	68	}
63551ae0	69	}
1da177e4	70
3f787fe2	71	return pte;
1da177e4 LT	72	}
1da177e4 LT	73
1da177e4 LT	74	int pmd_huge(pmd_t pmd)
	75	{
	76	return 0;
	77	}
	78
ceb86879 AK	79	int pud_huge(pud_t pud)
	80	{
	81	return 0;
	82	}