1 // SPDX-License-Identifier: GPL-2.0 <<
2 /* 1 /*
3 * arch/sh/mm/hugetlbpage.c !! 2 * MIPS Huge TLB Page Support for Kernel.
4 * 3 *
5 * SuperH HugeTLB page support. !! 4 * This file is subject to the terms and conditions of the GNU General Public
>> 5 * License. See the file "COPYING" in the main directory of this archive
>> 6 * for more details.
6 * 7 *
7 * Cloned from sparc64 by Paul Mundt. !! 8 * Copyright (C) 2002, Rohit Seth <rohit.seth@intel.com>
8 * !! 9 * Copyright 2005, Embedded Alley Solutions, Inc.
9 * Copyright (C) 2002, 2003 David S. Miller (d !! 10 * Matt Porter <mporter@embeddedalley.com>
>> 11 * Copyright (C) 2008, 2009 Cavium Networks, Inc.
10 */ 12 */
11 13
12 #include <linux/init.h> <<
13 #include <linux/fs.h> 14 #include <linux/fs.h>
14 #include <linux/mm.h> 15 #include <linux/mm.h>
15 #include <linux/hugetlb.h> 16 #include <linux/hugetlb.h>
16 #include <linux/pagemap.h> 17 #include <linux/pagemap.h>
>> 18 #include <linux/err.h>
17 #include <linux/sysctl.h> 19 #include <linux/sysctl.h>
18 <<
19 #include <asm/mman.h> 20 #include <asm/mman.h>
20 #include <asm/tlb.h> 21 #include <asm/tlb.h>
21 #include <asm/tlbflush.h> 22 #include <asm/tlbflush.h>
22 #include <asm/cacheflush.h> <<
23 23
24 pte_t *huge_pte_alloc(struct mm_struct *mm, st 24 pte_t *huge_pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma,
25 unsigned long addr, un !! 25 unsigned long addr, unsigned long sz)
26 { 26 {
27 pgd_t *pgd; 27 pgd_t *pgd;
28 p4d_t *p4d; 28 p4d_t *p4d;
29 pud_t *pud; 29 pud_t *pud;
30 pmd_t *pmd; <<
31 pte_t *pte = NULL; 30 pte_t *pte = NULL;
32 31
33 pgd = pgd_offset(mm, addr); 32 pgd = pgd_offset(mm, addr);
34 if (pgd) { !! 33 p4d = p4d_alloc(mm, pgd, addr);
35 p4d = p4d_alloc(mm, pgd, addr) !! 34 pud = pud_alloc(mm, p4d, addr);
36 if (p4d) { !! 35 if (pud)
37 pud = pud_alloc(mm, p4 !! 36 pte = (pte_t *)pmd_alloc(mm, pud, addr);
38 if (pud) { <<
39 pmd = pmd_allo <<
40 if (pmd) <<
41 pte = <<
42 } <<
43 } <<
44 } <<
45 37
46 return pte; 38 return pte;
47 } 39 }
48 40
49 pte_t *huge_pte_offset(struct mm_struct *mm, !! 41 pte_t *huge_pte_offset(struct mm_struct *mm, unsigned long addr,
50 unsigned long addr, uns !! 42 unsigned long sz)
51 { 43 {
52 pgd_t *pgd; 44 pgd_t *pgd;
53 p4d_t *p4d; 45 p4d_t *p4d;
54 pud_t *pud; 46 pud_t *pud;
55 pmd_t *pmd; !! 47 pmd_t *pmd = NULL;
56 pte_t *pte = NULL; <<
57 48
58 pgd = pgd_offset(mm, addr); 49 pgd = pgd_offset(mm, addr);
59 if (pgd) { !! 50 if (pgd_present(*pgd)) {
60 p4d = p4d_offset(pgd, addr); 51 p4d = p4d_offset(pgd, addr);
61 if (p4d) { !! 52 if (p4d_present(*p4d)) {
62 pud = pud_offset(p4d, 53 pud = pud_offset(p4d, addr);
63 if (pud) { !! 54 if (pud_present(*pud))
64 pmd = pmd_offs 55 pmd = pmd_offset(pud, addr);
65 if (pmd) <<
66 pte = <<
67 } <<
68 } 56 }
69 } 57 }
70 !! 58 return (pte_t *) pmd;
71 return pte; <<
72 } 59 }
73 60
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