1// SPDX-License-Identifier: GPL-2.0
 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
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>
17#include <linux/sysctl.h>
18
19#include <asm/mman.h>
 
20#include <asm/tlb.h>
21#include <asm/tlbflush.h>
22#include <asm/cacheflush.h>
23
24pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
25			unsigned long addr, unsigned long sz)
26{
27	pgd_t *pgd;
28	p4d_t *p4d;
29	pud_t *pud;
30	pmd_t *pmd;
31	pte_t *pte = NULL;
32
33	pgd = pgd_offset(mm, addr);
34	if (pgd) {
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			}
43		}
44	}
45
46	return pte;
47}
48
49pte_t *huge_pte_offset(struct mm_struct *mm,
50		       unsigned long addr, unsigned long sz)
51{
52	pgd_t *pgd;
53	p4d_t *p4d;
54	pud_t *pud;
55	pmd_t *pmd;
56	pte_t *pte = NULL;
57
58	pgd = pgd_offset(mm, addr);
59	if (pgd) {
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			}
68		}
69	}
70
71	return pte;
72}
73
 
 
 
 
 
 
 
 
 
 
 
74int pmd_huge(pmd_t pmd)
75{
76	return 0;
77}
78
79int pud_huge(pud_t pud)
80{
81	return 0;
 
 
 
 
 
 
82}

 
 1/*
 2 * arch/sh/mm/hugetlbpage.c
 3 *
 4 * SuperH HugeTLB page support.
 5 *
 6 * Cloned from sparc64 by Paul Mundt.
 7 *
 8 * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
 9 */
10
11#include <linux/init.h>
12#include <linux/fs.h>
13#include <linux/mm.h>
14#include <linux/hugetlb.h>
15#include <linux/pagemap.h>
16#include <linux/sysctl.h>
17
18#include <asm/mman.h>
19#include <asm/pgalloc.h>
20#include <asm/tlb.h>
21#include <asm/tlbflush.h>
22#include <asm/cacheflush.h>
23
24pte_t *huge_pte_alloc(struct mm_struct *mm,
25			unsigned long addr, unsigned long sz)
26{
27	pgd_t *pgd;
 
28	pud_t *pud;
29	pmd_t *pmd;
30	pte_t *pte = NULL;
31
32	pgd = pgd_offset(mm, addr);
33	if (pgd) {
34		pud = pud_alloc(mm, pgd, addr);
35		if (pud) {
36			pmd = pmd_alloc(mm, pud, addr);
37			if (pmd)
38				pte = pte_alloc_map(mm, NULL, pmd, addr);
 
 
 
39		}
40	}
41
42	return pte;
43}
44
45pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr)
 
46{
47	pgd_t *pgd;
 
48	pud_t *pud;
49	pmd_t *pmd;
50	pte_t *pte = NULL;
51
52	pgd = pgd_offset(mm, addr);
53	if (pgd) {
54		pud = pud_offset(pgd, addr);
55		if (pud) {
56			pmd = pmd_offset(pud, addr);
57			if (pmd)
58				pte = pte_offset_map(pmd, addr);
 
 
 
59		}
60	}
61
62	return pte;
63}
64
65int huge_pmd_unshare(struct mm_struct *mm, unsigned long *addr, pte_t *ptep)
66{
67	return 0;
68}
69
70struct page *follow_huge_addr(struct mm_struct *mm,
71			      unsigned long address, int write)
72{
73	return ERR_PTR(-EINVAL);
74}
75
76int pmd_huge(pmd_t pmd)
77{
78	return 0;
79}
80
81int pud_huge(pud_t pud)
82{
83	return 0;
84}
85
86struct page *follow_huge_pmd(struct mm_struct *mm, unsigned long address,
87			     pmd_t *pmd, int write)
88{
89	return NULL;
90}