projects / linux.git / blame
| 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 ([email protected]) | |
| 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 | { |
| 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) | |
| b7b7ef6b | 41 | pte = pte_alloc_huge(mm, pmd, addr); |
| 874e2cc1 | 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, |
| 50 | unsigned long addr, unsigned long sz) | |
| 1da177e4 LT |
51 | { |
| 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) | |
| b7b7ef6b | 66 | pte = pte_offset_huge(pmd, addr); |
| 874e2cc1 | 67 | } |
| 3f787fe2 | 68 | } |
| 63551ae0 | 69 | } |
| 1da177e4 | 70 | |
| 3f787fe2 | 71 | return pte; |
| 1da177e4 | 72 | } |