tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
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/pgalloc.h>
21#include <asm/tlb.h>
22#include <asm/tlbflush.h>
23#include <asm/cacheflush.h>
24
25pte_t *huge_pte_alloc(struct mm_struct *mm,
26 unsigned long addr, unsigned long sz)
27{
28 pgd_t *pgd;
29 pud_t *pud;
30 pmd_t *pmd;
31 pte_t *pte = NULL;
32
33 pgd = pgd_offset(mm, addr);
34 if (pgd) {
35 pud = pud_alloc(mm, pgd, addr);
36 if (pud) {
37 pmd = pmd_alloc(mm, pud, addr);
38 if (pmd)
39 pte = pte_alloc_map(mm, pmd, addr);
40 }
41 }
42
43 return pte;
44}
45
46pte_t *huge_pte_offset(struct mm_struct *mm,
47 unsigned long addr, unsigned long sz)
48{
49 pgd_t *pgd;
50 pud_t *pud;
51 pmd_t *pmd;
52 pte_t *pte = NULL;
53
54 pgd = pgd_offset(mm, addr);
55 if (pgd) {
56 pud = pud_offset(pgd, addr);
57 if (pud) {
58 pmd = pmd_offset(pud, addr);
59 if (pmd)
60 pte = pte_offset_map(pmd, addr);
61 }
62 }
63
64 return pte;
65}
66
67int pmd_huge(pmd_t pmd)
68{
69 return 0;
70}
71
72int pud_huge(pud_t pud)
73{
74 return 0;
75}