1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * arch/sh/mm/hugetlbpage.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * SuperH HugeTLB page support.
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Cloned from sparc64 by Paul Mundt.
8*4882a593Smuzhiyun *
9*4882a593Smuzhiyun * Copyright (C) 2002, 2003 David S. Miller (davem@redhat.com)
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/fs.h>
14*4882a593Smuzhiyun #include <linux/mm.h>
15*4882a593Smuzhiyun #include <linux/hugetlb.h>
16*4882a593Smuzhiyun #include <linux/pagemap.h>
17*4882a593Smuzhiyun #include <linux/sysctl.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <asm/mman.h>
20*4882a593Smuzhiyun #include <asm/tlb.h>
21*4882a593Smuzhiyun #include <asm/tlbflush.h>
22*4882a593Smuzhiyun #include <asm/cacheflush.h>
23*4882a593Smuzhiyun
huge_pte_alloc(struct mm_struct * mm,struct vm_area_struct * vma,unsigned long addr,unsigned long sz)24*4882a593Smuzhiyun pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
25*4882a593Smuzhiyun unsigned long addr, unsigned long sz)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun pgd_t *pgd;
28*4882a593Smuzhiyun p4d_t *p4d;
29*4882a593Smuzhiyun pud_t *pud;
30*4882a593Smuzhiyun pmd_t *pmd;
31*4882a593Smuzhiyun pte_t *pte = NULL;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun pgd = pgd_offset(mm, addr);
34*4882a593Smuzhiyun if (pgd) {
35*4882a593Smuzhiyun p4d = p4d_alloc(mm, pgd, addr);
36*4882a593Smuzhiyun if (p4d) {
37*4882a593Smuzhiyun pud = pud_alloc(mm, p4d, addr);
38*4882a593Smuzhiyun if (pud) {
39*4882a593Smuzhiyun pmd = pmd_alloc(mm, pud, addr);
40*4882a593Smuzhiyun if (pmd)
41*4882a593Smuzhiyun pte = pte_alloc_map(mm, pmd, addr);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return pte;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
huge_pte_offset(struct mm_struct * mm,unsigned long addr,unsigned long sz)49*4882a593Smuzhiyun pte_t *huge_pte_offset(struct mm_struct *mm,
50*4882a593Smuzhiyun unsigned long addr, unsigned long sz)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun pgd_t *pgd;
53*4882a593Smuzhiyun p4d_t *p4d;
54*4882a593Smuzhiyun pud_t *pud;
55*4882a593Smuzhiyun pmd_t *pmd;
56*4882a593Smuzhiyun pte_t *pte = NULL;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun pgd = pgd_offset(mm, addr);
59*4882a593Smuzhiyun if (pgd) {
60*4882a593Smuzhiyun p4d = p4d_offset(pgd, addr);
61*4882a593Smuzhiyun if (p4d) {
62*4882a593Smuzhiyun pud = pud_offset(p4d, addr);
63*4882a593Smuzhiyun if (pud) {
64*4882a593Smuzhiyun pmd = pmd_offset(pud, addr);
65*4882a593Smuzhiyun if (pmd)
66*4882a593Smuzhiyun pte = pte_offset_map(pmd, addr);
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun return pte;
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
pmd_huge(pmd_t pmd)74*4882a593Smuzhiyun int pmd_huge(pmd_t pmd)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun return 0;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
pud_huge(pud_t pud)79*4882a593Smuzhiyun int pud_huge(pud_t pud)
80*4882a593Smuzhiyun {
81*4882a593Smuzhiyun return 0;
82*4882a593Smuzhiyun }
83